BUILDING ENGINEERING FINAL GRADE ENERGY CERTIFICATION PROJECT FOR A YOUTH MULTI FUNCTIONAL WELCOME HOME, AIGUABLAVA BARCELONA DOCUMENT 1.

Transcription

1 BUILDING ENGINEERING FINAL GRADE ENERGY CERTIFICATION PROJECT FOR A YOUTH MULTI FUNCTIONAL WELCOME HOME, AIGUABLAVA BARCELONA DOCUMENT 1. MEMORY Designer: Director: Announcement: DAVID LLOP BERNUS MONTSERRAT BOSCH GONZÀLEZ OCTOBER 2011

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3 2 CERTIFICATION OF ENERGY PROJECT FOR A HOUSE OF WELCOME OF ADOLESCENT MULTI FUNCTIONAL, AIGUABLAVA BARCELONA ABSTRACT This Final Grade Project (from now on FGP) is to explain what energy certification is, what options there are to do it and how to perform a certified energy project using the most common options, LIDER and CALENER software. The method chosen to explain how certification is done in an energy project is using a real example of application of energy certification at a Youth Multifunctional Welcome Home at Aiguablava Street in Barcelona, done by author of this project in October The documents that make the following FGP are structured with the following parts: DOCUMENT 1 1. Historical context of energy certification and regulatory framework. 2. Energy Certification. Concept and procedures. 3. Procedures for obtaining Energy Certification of a project. Example. a. Verification of DB HE1. LIDER Software. b. Obtaining Energy Rating. CALENER GT program. c. Registration at ICAEN (Catalan Institute of Energy) to obtain Energy Project Certification. 4.Comment on current situation of Energy Certification. DOCUMENT 2 Graphic documentation DOCUMENT 3 Annex

4 CERTIFICATION OF ENERGY PROJECT FOR A HOUSE OF WELCOME OF ADOLESCENT MULTI FUNCTIONAL, AIGUABLAVA BARCELONA 3 INDEX 1. GLOSSARY AND ACRONYMS 4 2. INTRODUCTION 6 3. HISTORICAL CONTEXT AND REGULATORY FRAMEWORK HISTORICAL CONTEXT REGULATORY FRAMEWORK DIRECTIVE 2010/31/UE. (CURRENT REGULATORY FRAMEWORK) 7 4. ENERGY CERTIFICATION. CONCEPT AND PROCEDURES DEFINITIONS ENERGY RATING CALCULATION METHODOLOGY GENERAL OPTION OR SIMPLIFIED? SIMPLIFIED OPTION GENERAL OPTION LABEL AND RATIO SCALES ENERGY CERTIFICATION ENERGY EFFICIENCY CERTIFICATE 14

5 4 CERTIFICATION OF ENERGY PROJECT FOR A HOUSE OF WELCOME OF ADOLESCENT MULTI FUNCTIONAL, AIGUABLAVA BARCELONA 1. GLOSSARY AND ACRONYMS NOTE. The definitions that appear in this section are listed in alphabetical order and are identified by being written in italics, highlighted in bold and followed by an asterisk. AIR PERMEABILITY: It is the property of a window or door to let air pass when it is subjected to a differential pressure. Air s permeability characteristic is airflow capacity, expressed in m³ / h, depending on the pressure difference. CALENER: The CALENER Software is a tool promoted by the Ministry of Industry, Tourism and Trade through the (IDEA) and the Ministry of Housing, which helps to determine the level of Energy Efficiency in a building. CENER: "National Centre for Renewable energies". is a technological centre that specializes in applied research, development and promotion of renewable energy. It has a highly qualified and recognized worldwide. It is a foundation that began its activity in 2002, the Board which is composed by the Ministry of Industry, the Ministry of Science and Innovation * Ciemat, and the Government of Navarre. COMPACTNESS OF THE BUILDING: Relationship between the volume V enclosed by the thermal envelope and the sum S of the surfaces of the envelope. C = V / S [m]. DB HE1: This is one of six Basic Documents (DB) that form the Technical Building Code (TBC), in which minimum values of quality and procedures are specified, the compliance of which ensure the satisfaction of the basic requirements concerning energy saving, making a rational use of it in the common building use. DECRET D ECOEFICIÈNCIA: On the 14th of February the Catalan Government approved the Decree 21/2006, which regulates the adoption of environmental and ecoefficiency criteria for buildings. The Decree defines a set of ecoefficient parameters that buildings must satisfy, and are grouped in four areas: water, energy, materials and construction systems, and residual products. In some points it is more restrictive than the TBC. ENERGY DEMAND: Is the energy required to maintain at the interior of the building at comfort conditions, defined by regulations based on the use of the building and the climate zone in which its placed. It consists of the energy demand for heating, during the months of seasonal heating and cooling respectively. ESCOs: (Energy Services Companies) They are energy service companies that design, develop, install and finance Energy Efficient and Renewable energy projects (solar * wind, etc.).. They take technical and financial risks associated with the project. Typically the services offered by these companies are: a) Development, design and project financing b) Installation and maintenance of the efficient equipment. c) Measurement, monitoring and verification of savings generated by the project d) Assume the risk of the project. ICAEN. Catalan Energy Institute is the competent body in charge of the inscription and of registration of Catalan Certification. INSIDE SURFACE TEMPERATURE FACTOR (frsi): Temperature difference between superficial interior and outside air, calculated with an internal surface resistance RSI. KYOTO PROTOCOL: The Kyoto Protocol is an international agreement for climatic change prevention, sponsored by the (UNO) within the United Nations Framework Convention on Climatic Change (CMNUCC), signed at 2002 by the European Union (EU), whose objective was for industrialized countries to reduce an 8% their emissions in respect to 1990 volume, as developing countries have no restrictions as would be the case of China, India or Brazil, to name the most polluting. Its formal English name is the Kyoto Protocol To the United Nations Framework Convention on Climate Change. The 11th of December 1997, industrialized countries compromised at Kyoto to run a number of measures to reduce greenhouse effect gases. The signing governments agreed a 5,2% average decrease in polluting emissions between 2008 and 2012, in reference to 1990 levels. The agreement came into force the16th of February 2005 following Russian ratification the 18 th of November The main objective is to fight the effects of climate change. According to UNO numbers, it is expected that the average temperature of the planet s surface will increases between 1.4 and 5.8 ºC by 2100, although winters are colder and more violent. This is known as global warming. "These changes will impact heavily on the ecosystem and our economies," points out the European Commission at Kyoto. LIDER: LIDER is the software that allows the general verification option to meet the DB HE1 requirements and is sponsored by the Ministry of Housing and the Institute for Energy Diversification and Saving (IDEA). MODIFIED SOLAR FACTOR: The product of solar factor per shade factor. NBE-CT79: "Basic rule of buildings on thermal conditions in the buildings," repealed by DB HE1. NEARLY ZERO-ENERGY BUILDING: A building with a very high level of Energy Efficiency, as determined by conformity to the annex of the directive The nearly zero or small amount of energy required should be covered in great extent by energy from renewable sources, produced on-site or nearby. Or otherwise, buildings capable to generate the same energy they consume. RD 47/2007: Royal Decree 47/2007 of 19 th of January, which approves the basic procedure for certifying energy efficiency of new buildings. RICCA: Regulation of Heating, Air conditioning and Sanitary hot water approved by the Royal Decree 1618/1980 of 4 th of July, and subsequently developed, modified and supplemented by various dispositions. It has greatly contributed to promote and encourage a more rational use of the energies at thermal non industrial installations, usually destined to provide safely and efficiently the services for heating, cooling and sanitary hot water production required to meet the requirements of thermal comfort and hygiene in buildings, repealed by RD1751/1998 of 31 July, that approves the Regulation of Thermal Installations in buildings (RITE).

6 CERTIFICATION OF ENERGY PROJECT FOR A HOUSE OF WELCOME OF ADOLESCENT MULTI FUNCTIONAL, AIGUABLAVA BARCELONA 5 SKYLIGHT: Any empty space on a deck or roof, with a slope of less than 60 with respect to the plane, named as "skylight". SHADE FACTOR : It s the fraction of radiation in a vacuum not blocked by the presence of obstacles on the exterior walls or façade. SOLAR FACTOR: It is the ratio of solar radiation at normal incidence that enters the building through glass, and radiation which would enter if glass was replaced by a perfectly transparent vacuum.. TERTIARY BUILDING: Service sector or tertiary sector includes all those economic activities that don t produce directly goods, but are services that meet the needs of the population. It includes sub-sectors such as trade, transport, communications, finance, tourism, hosting, leisure, culture, entertainment, public administration and the so-called public services, provided both by the state or the private sector (health, education, care for dependents, etc.). THERMAL BRIDGES : Thermal bridges are considered those areas of the building envelope in which we find variations of the uniformity of the construction, either by changing the thickness of the closure, the materials used for penetration of construction elements with different conductivity, etc.., which necessarily entails a reduction in thermal resistance compared to other enclosures. The thermal bridges are sensitive parts of buildings which increases the possibility of producing condensation surface, common situations in winter or cold periods. THERMAL ENVELOPE: It consists of the building closures separating the habitable spaces from exterior spaces and the internal partitions that separate habitable sites of non-habitable contact with the outside exterior spaces. THERMAL TRANSMITTANCE* Is the heat flux in stationary regime, divided by the area and the temperature difference of the means placed on each side of the element considered.

7 6 CERTIFICATION OF ENERGY PROJECT FOR A HOUSE OF WELCOME OF ADOLESCENT MULTI FUNCTIONAL, AIGUABLAVA BARCELONA 2. INTRODUCTION The entry into force of RD 47/2007, poses an initial problem for the designer to accomplish the normative standards, as Energy Certification must be attached to the executive project. This new procedure is solved easily if it s a housing project using the Simplified Option, filling out a simple form, along with information about the executive project compliance with the DB HE1 * and the Decret d Ecoeficiencia * and present it to the competent authority, ICAEN * in Catalonia. But the problem, arises when certifying for tertiary buildings or housings, constructions that don t meet the requirements to be evaluated according to the Simplified Option, so the use of computer programs specialized in energy certification LIDER* and CALENER * is needed. The big problem was finding someone who could use them. The engineering company for whom I work, decided to start working with these programs as they were familiar with this problem, every day different architectural firms working in collaboration wanted coverage in this issue,. The motivation that pushed me to do this FPG, is none other than three years of experience at Energy Certification Projects (some at already finished building) and over thirty Certifications, mostly of Educational buildings. I wanted to share this experience and give a small help to future students of this University, and so, encourage them to work and increase their knowledge on this subject, hoping that the contents of this FPG serves them to understand a little better the software tools at our disposal to make Energy Certificates.

8 CERTIFICATION OF ENERGY PROJECT FOR A HOUSE OF WELCOME OF ADOLESCENT MULTI FUNCTIONAL, AIGUABLAVA BARCELONA 7 3. HISTORICAL CONTEXT AND REGULATORY FRAMEWORK HISTORICAL CONTEXT For over a century, during industrial development, man has mainly used fossil fuels as a cheap and inexhaustible energy source. It was not until the year 1973, at the first oil crisis, when man became aware that the until now believed unlimited source of oil is harder to reach. The once superficial oil bags are dry, thus the need to look deeper results in the increase of extraction costs. To all this, must be added the large population growth experienced globally in the twentieth century, from 1500 to 6000 million, also increasing the demand of fuel oil. This first obstacle, alerts the developed countries for the need to change the energy policy model too dependent on oil exports. The first visible measure in Spain (although it took several years to appear), that had an effect on construction, was the appearance of the first specific legislation regulating the minimum building insulation NBE-CT79*, and following at 1980 the first regulations of buildings heating systems appeared, the RICCA *. Assuming that petrol could be a cheap and an inexhaustible source of energy, it s combustion poses a new dilemma to be solved and gives a definitive shift in the energy policies of the States as CO2 emissions resulting from fossil fuel combustion cause an increase in the greenhouse effect on Earth's surface, causing global warming and consequently a climate change caused by man. From this issue in December 1997 the first summit on climate change, the "Kyoto Protocol" * arose. The EEC (European Economic Community), aware that most of the CO2 emissions (40% at European level) come from buildings, found it necessary to regulate this aspect. From this need and the Kyoto agreement signature, the European Parliament and the Council of the European Union approved Directive 2002/91/EC on December 16 th 2002 on Energy Efficiency in buildings. It should be mentioned that this was not the first time the EEC undertook initiatives to reduce CO2 emissions of buildings;17 years before the EU drafted and approved the SAVE Directive 76/93 aimed at reducing CO2 atmosphere emissions as a result of energy consumption in the construction sector. This Directive defined the Energy Certification methodology, but without any calculation program set to carry it out. The problem with this directive was that each state member developed it s own valuation of environmental impact by the generation of CO2 emissions. So the implementation of the directive, which was 2 years later, was not carried out REGULATORY FRAMEWORK The aim of Directive 2002/91/EC is to promote Energy Efficiency in buildings at EEC, taking into account outdoor climate and local particularities, as well as indoor environmental requirements and cost-effectiveness. This Directive establishes requirements in relation to: The general framework of a methodology for calculating the integrated energy performance of buildings. The application of minimum energy efficiency requirements for new buildings and large existing buildings subject to major reforms. Energy certification of buildings. The regular inspection of heating boilers and air conditioning systems of buildings, and assessment of heating installations of over 15 years. The implementation in Spain of the objectives of Directive 2002/91/EC (which has recently been amended by Directive 2010/31/UE) was carried out through a series of norms: Royal Decree 314/2006, 17 th of March 2006, approving thetbc. The basic requirements set out in Articles 4, 5 and 6 of Directive 2002/91/EC were included in the TBC Basic Documents on energy saving (DB-HE). Royal Decree 1027/2007, 20 th of July, approving the Regulation of Thermal Installations of buildings. This Decree repeals and replaces the Regulation of Thermal Installations of buildings (RITE), approved by Royal Decree 1751/1998 of 31 st of July. Royal Decree 47/2007, 19 th of January, by which the Energy Certification of new buildings is approved. This Royal Decree establishes the basic procedures which calculation methodology must meet for Energy Efficiency qualification, initiating certification process, considering those factors that have larger impact on energy consumption. It applies to new buildings, modifications, alterations or renovations of existing buildings with a useful area exceeding 1,000 m² with a renewal of more than 25% of its total closures. It also imposes the obligation to deliver to buyers or renters of housings, an of Energy Efficiency Certificate that allows them to know the characteristics of the building to assess and compare before sale or rental Directive 2010/31/UE. (Current regulatory framework) 2010/31/UE Directive of the European Parliament and Council of 19 th of May 2010 on the energy performance of buildings (revised text), comes into force on the twentieth day following its publication in the Official Journal of the EU and repeals Directive 2002/91/EC from 1 February 2012 onwards. As mentioned in the Directive, 40% of total energy consumption in the EU is from buildings. The sector is at an expansion phase, which will increase energy consumption. Therefore, the reduction of energy consumption and the use of Renewable energy sources in the construction sector is an important part of the necessary measures to reduce energy dependency of the EU and gas emissions with greenhouse effect. For this reason the European Council in March 2007 highlighted the need to increase Energy Efficiency in the EU to achieve the aim of reducing its energy consumption by 20% by 2020, and called for an fast and complete application of the priorities established at the Communication of the Commission "Action Plan for Energy Efficiency: reach its Potential", where considerable potential energy saving of the building sector was shown. In its Resolution of 31 st of January 2008 the European Parliament called for a strengthening of the provisions of Directive 2002/91/EC in a strategy of improvement and of energy efficiency in buildings, decrease emissions and the integrate renewable energies. This new directive is actually a revised text of the above, maintaining the same purpose, but better in some aspects and setting objectives that must be achieved gradually in the near future and forced to change some aspects of current regulations. The highlights of the new regulation are: Establishing a general common framework for calculation methodology of building s energy efficiency, so as to unify the methods used by State Members.

9 8 CERTIFICATION OF ENERGY PROJECT FOR A HOUSE OF WELCOME OF ADOLESCENT MULTI FUNCTIONAL, AIGUABLAVA BARCELONA It erases the minimum area of 1000m ² to implement the minimum requirements to reform or rehabilitate buildings, being as follows: "Major reforms": renovation of a building when: The new Directive makes an special amendment for the need of further control over the requirements of the regulations on energy efficiency to improve the results of the previous directive. a) the total costs of the renovation related to the envelope of the building or its technical facilities are more than 25% of the value of the building, excluding the value of the land on which it is built. b) more than 25% of the surface of the envelope of the building is renewed. State Members may choose between the application of option a) or b). This will force change in the application scope of DB HE1 and RD 47/2007. State Members shall have to calculate the optimal cost of efficiency levels and adjust the minimum requirements to these levels. These calculations shall be done considering the lifetime of the building and as a result will surely lead to the review of minimum and maximum values of thermal transmittance of the HE1 DB closings, understanding (this is a personal evaluation), the current values give insulation thicknesses at closures which are below the optimal cost recommended by a study by CENER *, which is recommended to be read. Table Thickness of insulation. (Source: CENER) State Members should seek by financial measures to stimulate investment in energy efficiency, encouraging entrepreneurship * ESCOs (Energy Service Companies) Steps shall be taken to ensure in those buildings with floor space greater than 500 m², frequented by the public and which have been issued a Certificate of Energy Efficiency, that such certificate shall be set in a prominent and visible place. In 2015 this requirement shall also apply to buildings of 250 m². Governments should promote the implementation of improvements in energy efficiency associated with the certification setting an example at public buildings. All buildings (residential, offices and services) that are constructed from 2020 onwards will be nearly zero-energy building *, in public buildings this term is set earlier at 2018.

10 CERTIFICATION OF ENERGY PROJECT FOR A HOUSE OF WELCOME OF ADOLESCENT MULTI FUNCTIONAL, AIGUABLAVA BARCELONA 9 4. ENERGY CERTIFICATION. CONCEPT AND PROCEDURES DEFINITIONS Royal Decree 47/2007 establishes the following definitions: Energy efficiency in buildings: is the energy consumption estimated necessary to meet the energy demand of the building in daily operation and occupation. Energy efficiency Rating of a building: energy efficiency of a building that is expresses in a determined calculation methodology and is expressed with energy indicators through the Energy Efficiency label. Project Certification of Energy Efficiency : the process that verifies the conformity of the energy Project efficiency rating and leads to issue the project s certificate of energy efficiency. Certification of energy efficiency in completed buildings: the process that verifies the conformity of the energy project efficiency rating towards the finished building and leads to issue a certificate of energy efficiency of completed building. General Option: Reference Procedure: CALENER VYP or CALENER GT. Alternative procedure recognized and validated. Simplified Option: Ministry IDAE Option : simplified procedure for housing buildings that comply strictly with the simplified option of HE1. Other agencies have offered alternative options for simplified calculation other than the Commissions. "Simplified housing CE2 ". Energy Certification Simplified "CES". Abbreviated Residential Energy Qualification Method "CERMA" Table Outline of options to obtain energy rating. (Source: ICAEN) Energy Project s Efficiency Certificate: are the documents signed by the designer as a result of the certification process that include energy efficiency rating of the project indicating the energy efficiency scale. Energy Efficiency Certificate of completed buildings: are the documents signed by the work s direction as a result of the certification process that includes energy efficiency rating of the finished building indicating the scale of energy efficiency. Energy efficiency label: label indicating the level of energy project efficiency rating or of completed buildings. Documents recognized for energy efficiency certification : Technical Documentation, without the normative featuring, that have been recognized by the Ministry of Industry, Trade and Tourism and the Ministry of Housing, and are registered within the General Register for such purpose. Having set these definitions we develop and extend its meaning in the following sections ENERGY RATING The energy efficiency rating of a building is the expression of the energy efficiency of a building determined according to a calculation methodology and is expressed with energy indicators within the energy efficiency label, that range from the letter A to G, from the most efficient to the least Calculation Methodology The calculation methodology used will depend largely on the characteristics of our building, which will determine whether this classification can be performed by one of the two options available and described below: Besides the minimum requirements for thermal transmittance* of walls and minimum solar contribution to sanitary hot water set by the respective basic documents of the TBC, also the minimum requirements of eco-efficiency of Catalonia Decree and the municipal ordinances, whenever the case, should be met.

11 10 CERTIFICATION OF ENERGY PROJECT FOR A HOUSE OF WELCOME OF ADOLESCENT MULTI FUNCTIONAL, AIGUABLAVA BARCELONA General Option or Simplified? As technicians committed to energy efficiency, we should always favour the use of General Option, because this software permits energy demand *and consumption simulation of our building, allowing us to consider whether we need to improve some aspect in the design of our building and be able to analyze the feasibility of the improvements. On the other hand the Simplified option only permits proof that our building meets minimum parameters, although the new recognized documents provide more information, they are only simulations that safety versed. What we really want to analyze in this section, based on regulations, when each choice is best.. The Simplified option is restricted exclusively to residential buildings and those which comply strictly with the Simplified DB HE1 option. The Simplified Option can be applied in New constructions and Rehabilitation, in both cases provided that: The use of conventional construction solutions, and the surface of openings in the façade is 60% of it s surface, and skylights * area is 5% of the total area of the roof. It shall be presented with the model justifying files specified by DB HE1. Obtaining Energy Rating (Simplified option) As mentioned above, it can be obtained with the use of four recognized documents: 1. Basic simplified procedure (Option Ministry IDAE) Simplified procedure for residential buildings that comply strictly with the HE1 Simplified option. It was the first known document applied only to housing, and allows to obtain E and D rating based on a number of technical solutions in relation to the compactness of the building *, published in twelve tables (six per single-family housing and six per flats housing) distributed based on climatic zones. It has to be remembered that the studied building must comply with paragraphs HE1, HE2, HE3 and HE4,of the HE section of the TBC, guarantee E rating, and if it also meets any of the table solutions, it could obtain D. Table a. Details of obtaining energy rating. (Source: IDAE) As an exception percentage openings of > 60% are allowed if the surface of the façade is less than 10% of the sum of the areas of all façades of the building. In addition, the average transmittance of the façade (including windows and solid parts) must be less than the average transmittance obtained if the percentage of openings was 60%. In all other cases that don t meet these requirements, the General option must be chosen. However, we might find a tertiary *building with regards justification of the DB HE-1 within the parameters, that could be justified with a Simplified option, but it wouldn t make sense since it would involve a lot of work and when making energy certification we should need to use the geometric building definition with CALENER software, which shares engine calculation and environment with LIDER if it s VYP, and allows to export LIDER geometry if it s CALENER GT, so once the geometric definition at LIDER is done, verification of DB HE-1 would only be a matter of pressing a button and get the report generated Simplified Option Justification DB HE1 In the Simplified Option the building s energy demand is limited indirectly, verifying that the characteristic parameters of the thermal envelope* of the building (Thermal transmittance and Modified solar factor *) do not exceed the limits established for each climate zone. Surface and interstitial condensation must also be checked. The first shall be avoided setting a minimum value of interior superficial temperature factor (frsi) for each closing, and interstitial condensation is controlled by checking that the vapor pressure at the surface of each closing layer is lower than the saturation pressure. The temperature factor of the inner surface (frsi)* is a non-dimensional value that relates the outdoor winter temperature and the design of the indoor environment (set to 20 C) with the inner surface closure, so as to ensure that this last one is higher than dew and no condensation will occur. We also need to check maximum air permeability* of the woodworks, which depend on the weather.

12 CERTIFICATION OF ENERGY PROJECT FOR A HOUSE OF WELCOME OF ADOLESCENT MULTI FUNCTIONAL, AIGUABLAVA BARCELONA Simplified housing Ce2. Figure b. Screen Data Entry Program CES. (Source: CES Program) Recognized document in November 2009, it was the first known that didn t come from the Administration. It is based on a few sheets (Excel) that cover all mainland climate zones (excluding Balearic Islands, Canary Islands, Ceuta and Melilla), which allow for B, C and D rating. The type of Energy Efficiency obtained from the building is expressed in terms of the Global Energy Efficiency Indicator IEEG. The procedure followed to obtain this Indicator is represented by the following diagram: Figure a. Obtaining energy rating scheme. (Source: ICAEN) 4. Residential Energy Rating, Abbreviated Method "CERM" Document recognized in May 2011, CERM is an application that allows the energy efficiency rating of residential buildings newly constructed for the whole of Spain, offering a detailed study to improve the rating obtained. This tool has been developed by the Valencian Institute of Building (* IVE) and the Spanish Technical Association of Refrigeration and Air Conditioning (ATECYR *) with the technical collaboration of the group FREDSOL * Department of Applied Thermodynamics of the Polytechnic University of Valencia and supported by the Ministry of Environment, Water, Planning and Housing of the Generalitat Valenciana. The method to obtain the rating is very similar to that described above. Figure b. Screen Data Entry Program ESC. (Source: CES Program) 3. Simplified Energy Certification "CES" On 14 April 2009 a draft document was presented as a recognized Certification of Energy Efficiency in buildings, the Energy Certification Simplified software (ECS). Due to the nature of the procedure, a battery of comparison tests were performed between the results obtained by applying the reference procedure CALENER VYP and ECS. ECS is a software program developed by MYABI, which obtains the rating of the studied building immediately after entering the data our building through different screens, this compares the entries with those in its database, obtained from battery of tests above described, and discriminating the type of building and climate zone. This method allows to obtain the same rating as CALENER VYP software.

13 12 CERTIFICATION OF ENERGY PROJECT FOR A HOUSE OF WELCOME OF ADOLESCENT MULTI FUNCTIONAL, AIGUABLAVA BARCELONA General Option The calculus methodology used in this option can usually be done with CALENER and LIDER software and its scope covers housing and tertiary buildings. DB HE1 Justification (LIDER Programm) LIDER software is a self reference based method, whilst the Simplified option explained limits energy demand in an indirect manner (limiting average values of the closings), in LIDER software limiting energy demand is checked by calculation and compares it to the reference building, thus our building (from now on object building) being valued below the reference building. Hence, it is named self reference method as it compares the demand of the object building, which is none other than the one in our project, to the reference building, which consists of a building like ours in geometry, orientation, location and usage profiles, except that the exteriors comply with minimum DB HE1 regulations for each climate zone. So our building is being compared with itself but with worse closings, or at least it should be so, because if it weren t so the building wouldn t meet the demand for energy limitation imposed by DB HE1. LIDER means "Limitations in energy demand", it s a free software and can be downloaded from the website In the application example it will be explained in detail how it works. Obtaining Energy Rating (CALENER) After accomplishing the DB HE1 by LIDER, energy rating should be obtained with CALENER software. CALENER means "CALificación ENERgy"; and can be downloaded from the following website: aginas/documentosreconocidos.aspx. In tertiary buildings, depending on facilities, CALENER VYP or the CALENER GT may be used, the latter restricted exclusively to tertiary buildings. If we use the CALENER VyP there is no need to exit the program with which we have generated the LIDER as they share environment and calculation engine with the LIDER, we need only press a button to call in CALENER and a new tab will appear allowing us to enter the data of the facilities of our building. If the installations of our building do not allow us to obtain the energy rating with CALENER VyP, then we will have to use GT. Suffice to say, that whenever possible it is better to use VyP because it s simpler to use, plus the GT has a problem in the calculation of energy demand being that it doesn t include thermal bridges*, quite strange as for IDAE to accept a program as a recognized document it must include the calculation of thermal bridges according to the publication of the IDAE "conditions of acceptance of Procedures alternative to CALENER and LIDER" in its point The use of VyP or GT, is solely limited by the complexity of the facilities of our building and not by its size, as has been mentioned in some publications that associate the use of the VyP to residential and small tertiary, and of GT to large tertiary buildings. As an example, we could mention a building with partition of PB+2PP, a usable area of 200m ², destined for municipal offices where the Simplified option with DB HE1 justification could be done but being a tertiary building project energy ratings must be done using the General option, using LIDER directly. With respect to the facilities, the basement has radiant floor heating and the offices and meeting rooms with fan-coils where the heat carrier fluid is water, all supplied by a heat bomb with two heat pipes. This type of facility cannot be simulated by CALENER VyP, since this program does not cover this type of fan-coils, however if can be simulated with GT and the option "Ventiloconvectores." Note that in this example, the size of the building is not mandatory, but the type of air conditioning facilities are. In contrast, we could mention another example of a High school building of 6000 m² of constructed area where only heating equipment is installed (as in the summer it s closed), based on aluminium transmitters fed by a natural gas boiler, ventilation is performed with a UTA air treatment equipment, which heats the air going into the classrooms with a hydraulic circuit connected to the boiler drives, so that all consumption of energy demand of the building is met by the natural gas boiler. The modelling of this installation can be done in a quick, easy and reliable way with CALENER VyP, since the consumption of air conditioning can be entered as another radiator or affecting this consumption as a proportional consumption part of ventilation to the classroom radiators. Once again we see that it s not the size of the building that determines the CALENER to be chosen but the complexity of its facilities determine the software used Label and Ratio scales The Royal Decree 47/2007 of January 19th, by which the basic procedures for Energy Efficiency Certification of New Construction buildings was approved, states that Energy Efficiency Certificate will contain, among other things, the energy rating of the building expressed through an energy label. Using this label, the buildings are classified in energy efficiency labels within a scale of seven letters, which range from A (most energy efficient building) to G rating (least energy efficient building). For the designing of the energy label in our country,a specific study has been done in which the scales taken into consideration are those present in other countries, and specifically the proposal contained in document CEN pren "Energy performance of buildings - Methods for expressing energy performance and for energy certification of buildings" (version December 2005). The main energy indicator is expressed as: Emissions of CO2 per year, expressed in kg per m2 of usable area of the building. Primary Annual energy, in kwh per m2 of usable area of the building. Figure Sample label. (Source: RD47/2007)

14 CERTIFICATION OF ENERGY PROJECT FOR A HOUSE OF WELCOME OF ADOLESCENT MULTI FUNCTIONAL, AIGUABLAVA BARCELONA 13 Where: Io: are the CO2 emissions of the object building calculated according to the methodology described in Annex I and limited for heating, cooling and hot water services. Ir: corresponds to the average value of CO2 emissions from heating, cooling and hot water services for new building housings that comply strictly with sections HE1, HE2, HE3 and HE4 of the HE section of the TBC. R: the ratio between the value of Io and the value of CO2 emissions from heating, cooling and hot water services, 10% percent for new building housings that comply strictly with sections HE1, HE2, HE3 and HE4 of the HE section of the TBC. Is: corresponds to the average value of CO2 emissions from heating, cooling and hot water services for the existing park of residential buildings in R ': the ratio between the value Is and the value of CO2 emissions from heating, cooling and hot water services, of 10% percent for the existing park of residential buildings in The values of Ir, R, and R' corresponding to the various provincial capitals will be included in the document Energetic Rating scale for newly built buildings," published by IDAE. In this document the procedure to obtain such values in places that are not provincial capitals will be described. These values will be independent of the procedure used to evaluate CO2 emissions. For tertiary buildings there are no such comparison values. The only building similar to be used as a comparison is the so called reference building. The energy rating index (C) for each energy indicator is directly the index of energy efficiency, that is the relationship between the estimated value of the indicator for the object building and the value of the indicator for the reference building: As far as rating scales, as mentioned in Annex II of Royal Decree 47/2007, they re established according to the type of building; residential or tertiary, using in each case qualification indicators described in the Annex and are as follows: C1: Energy rating Indicator for new buildings intended for residential use. Table tables of energy rating scales. (Source: RD47/2007) C2: Energy rating Indicator for existing buildings intended for residential use. C: Energy rating Indicator for buildings for other uses (tertiary). The scales obtained in residential buildings and according to Table I, are the result of considering an efficiency indicator (to compare), the scenery of comparison (with which buildings the building under study is being compared), and finally, the limits of the letters representing the energy efficiency of the building in relation to the chosen indicator, so that indicators do not represent any percentage reduction of CO2 on any particular building, but are a representative scale that fixes the index of efficiency of our building. The scales obtained in Table II, as they don t arise from a comparative framework of a representative housing park, unless they come directly from a relationship as specified in the previous section, they can have a direct reading, so a building that achieves a grade "A" will have CO2 emissions lower than 60% of the reference building.

15 14 CERTIFICATION OF ENERGY PROJECT FOR A HOUSE OF WELCOME OF ADOLESCENT MULTI FUNCTIONAL, AIGUABLAVA BARCELONA 4.3. ENERGY CERTIFICATION. Energy Certification is the process through which we will obtain a Certificate of energy efficiency of our building and that is included in the verification of compliance with the Basic Document HE1 and the posterior obtainable Energy Efficiency Rating according to the methods explained above. The Energy Efficiency Project Certification, is an administrative procedure which verifies the conformity of the energy rating that the project has obtained, ending with the issuing of project certificate of energy efficiency. In Catalonia, the competent authority responsible for inscription and registration of Certificates and ultimately who CERTIFIES them is ICAEN (Catalan Energy Institute). The procedure for project energy certification is simultaneous to its registration at the Register of Project Certificates, as the software that creates the Certificate of energy efficiency of the project is the same that provides the registration number given at the Registry. This registration is done through internet and through an application called "Gen-t" which can be downloaded from the ICAEN website, address; 211bd30761a24210VgnVCM d0c1e0aRCRD&vgnextchannel=211bd30761a24210VgnVCM d0c1e0aRCRD&vgnextfmt=default Gent-t software is used to access both the program to make energy efficiency certification of buildings (RCEE) and the application form of grants for energy efficient and saving energies. From Gent-t you can access the certificate software that generates both project energy efficient and saving energies Certificate and of finished buildings, as the registration form of the Register. The inscription form at registration shall be signed by the developer. Once the Certificate is validated, printed, and signed by the developer and the competent technician, with the corresponding visa, it must be presented to the ICAEN with the documentation which accompanies the Certificate and mentioned below. 1. If you have used the General Option of rating: There are two types of certificates for energy efficiency: Energy Efficiency Project Certificate Together with the executive project of the building. Signed by the building designer or of the partial project part of the heating systems. Energy Efficiency Certificate of the finished building: Attached to the Building Book. Signed by the facultative Direction of the works. Its contents will be at least: Identification of the building. Indication of the energy legislation that is applicable at the time of its construction. Indication of the selected option, General or Simplified, and if it be the case, the reference software or Alternative used to obtain Energy Efficiency Rating. Description of the energy features of the building, thermal envelope, facilities, normal operation usage and occupation, data used to obtain the energy rating of the building. Qualification of energy efficiency expressed with energy indicators through energy efficiency label. Description of the tests, checking and inspections carried out during the execution of the building. In the case of the finished building. Obtaining the energy efficiency Certificate will grant the right of usage during the period of validity of the energy efficiency label, that will be 10 years or less. The label must be included in any offer, promotion and advertising, directed to the sale or lease of the building. It prohibits the display of labels, marks, symbols or inscriptions relating to energy efficiency certification of buildings that do not meet the requirements in RD 47/2007 and can lead to error or confusion. The building owner is responsible for certificate renewal or update of energy efficiency. Voluntary updating is possible, alleging variations in aspects of the building that may modify the certificate of energy efficiency. a. Compliance HE1 of the TBC of the Simplified option phase of the executive project or the file in pdf format created by LIDER program, printed. b. If the referral program used is CALENER, the created file in pdf format, printed. c. If you have used an alternative program, the file created by the program in printed form. d. Compliance of Eco Efficiency Decree, of the executive project printed. 2. If you have used the option of Simplified rating: a. Printed compliance of HE1 of the TBC of the Simplified option, of the executive project printed. b. If you have used the Simplified option of the Ministry IDAE, resulting tables printed. c. If Other. Specify. d. Compliance of Eco Efficiency Decree, of the executive project, printed ENERGY EFFICIENCY CERTIFICATE As explained, in the definition section, they are the documents signed by the designer as a result of the certification process that include energy efficiency rating of the project indicated the scale of energy efficiency.