ENERGY STATEMENT for a proposed new residential care home at Great North Road, Doncaster, South Yorkshire, DN6 7EJ

Transcription

1 ENERGY STATEMENT for a proposed new residential care home at Great North Road, Doncaster, South Yorkshire, DN6 7EJ Ref. No: 12/02870/FULM Contents 1. General Planning Condition Development Efficiency Measures Baseline CO Decentralised, Renewable or Low Carbon Sources Photovoltaics Air source heat pumps Results Photovoltaics Air source heat pumps... 5 Page 1 13 June 2013

2 1. General This energy statement has been prepared by test Ltd in support of a planning application for a proposed new residential care home at Great North Road, Doncaster, South Yorkshire, DN6 7EJ. The statement provides an initial assessment of the overall energy requirements for the proposed development using approved standard calculation methods (SBEM). 2. Planning Condition No development shall take place in implementation of this permission until the applicant has submitted to and received approval thereto in writing from the local planning authority a report identifying how the predicted CO 2 from the development will be reduced by at least 10% through the use of on-site renewable energy equipment. The carbon savings, which result from this, will be above and beyond what is required to comply with Part L Building Regulations. Unless otherwise agreed in writing by the local planning authority, the development shall then proceed in accordance with the approved report. Before any dwelling is occupied or sold, the renewable energy equipment shall have been installed and the local planning authority shall be satisfied that the day-to-day operation of the equipment will provide energy for the development as long as the development remains in existence. 3. Development The proposed development comprises a detached three storey residential care home. The construction will meet the requirements of the 2010 version of Approved Document L2A of the Building Regulations (2000). 4. Efficiency Measures Research by the Building Research Establishment (BRE) has found improvement to building fabric and services to be the most cost effective way of reducing energy. Results of the study indicated that: The cost per tonne of achieving a 1% reduction in CO 2 with renewables was approximately 4 times higher than building fabric improvement; and Combining improvements to building fabric and services to achieve approximately a 20% reduction in energy use was cheaper per tonne of CO 2 reduced than by achieving a 10% reduction by using renewables alone. Following this research BRE have concluded that improvements to building fabric and services should be implemented first with additional renewable energy installations to follow. Enhancing the thermal performance of the building envelope helps to future-proof the structure and also yields the greatest CO 2 savings. Adding renewable technologies will then yield maximum reductions with lower long-term costs for the developer. Page 2 13 June 2013

3 The following energy-efficient design measures are proposed: i. Enhanced fabric U-values: ii. a. Ground floor 0.16 W/m 2 K b. External walls 0.24 W/m 2 K c. Pitched roof (insulation at rafters) 0.18 W/m 2 K d. Pitched roof (insulation at joists) 0.13 W/m 2 K e. Windows 1.40 W/m 2 K Mechanical ventilation with heat recovery. iii. Design air permeability rate of 5m 3 /h.m 2. iv. High efficiency gas fired water heaters. v. 100% low energy lighting (LED). vi. Automated controls (Building Management System) and appropriate zoning to be provided for heating and lighting systems to ensure efficient management. 5. Baseline CO 2 For buildings built to the requirements of the 2010 version of Approved Document L2A of the Building Regulations the baseline CO 2 are the notional CO 2 as calculated using the National Calculation Method (SBEM). For this building the following baseline energy demand has been calculated: 6. Decentralised, Renewable or Low Carbon Sources 6.1. Photovoltaics Solar photovoltaics (PV) capture the sun's energy using photovoltaic cells. The cells convert sunlight into electricity, which can be utilised on site or transferred into the National Grid. PV cells are made from layers of semi-conducting material, usually silicon. When light shines on the cell it creates an electric field across the layers. The stronger the sunshine, Page 3 13 June 2013

4 the more electricity is produced. Groups of cells are mounted together in panels or modules that can be mounted on a roof. The power of a PV cell is measured in kilowatts peak (kwp). This is the rate at which the cell generates energy at peak performance in full direct sunlight during the summer. Proposal: Installing 165No. monocrystalline silicon photovoltaic panels (total collector size 271m 2 ). The panels shall be located on a south-east or south-west elevation with a 30 o pitch Air source heat pumps Air source heat pumps operate on similar principles to refrigerators. An electric pump extracts heat from the air using an exchanger and transfers it to a heating distribution system (radiators, underfloor heating systems, or warm air convectors). The pump can be designed to operate in reverse to provide cooling. Both ground and air source heat pumps require a supply of electricity to power the system but generally contribute around four to five times the amount of energy consumed. Furthermore the heat they extract from the ground, air, or water is constantly being renewed naturally. Proposal: 7. Results The following communal zones are to be heated and cooled via high efficiency air source heat pumps (SCOP > 4.0 and SEER > 3.6): i. Lounges. ii. Dining rooms. iii. Internal corridors. iv. Café. v. Activity room Photovoltaics Baseline (notional) (%) Page 4 13 June 2013

5 7.2. Air source heat pumps Baseline (notional) (%) Page 5 13 June 2013