The Institution of Engineering and Technology Savoy Place. BREEAM Bespoke 2008 Credit Man 9 Publication of Building Information Case Study Report

Transcription

1 The Institution of Engineering and Technology Savoy Place BREEAM Bespoke 2008 Credit Man 9 Publication of Building Information Case Study Report 1

2 Contents Project Description Sustainability Innovation at Savoy Place BREEAM Rating and Score The Key Innovative and Low Impact Design Features Of The Building Costs Functions and Areas Predicted Energy Consumption Construction Management Techniques to reduce Environmental Impacts Next Steps 2

3 Project Description Background The IET is a world leading professional organisation sharing and advancing knowledge to promote science, engineering and technology across the world 167,000 members worldwide in 127 countries. Savoy Place is the institutional headquarters and a unique conferencing venue set beside the Thames in London s city centre, blending historic character, the latest built in technology, stunning waterside views and top notch catering Project Aspirations, Aims and Priorities Introduce a distinct sense of place and belonging for the Institution members Apply the Vision, Mission and Values of the Institution wherever appropriate. Provide a generous and welcoming arrival and entry sequence Restore clear vertical and horizontal circulation routes throughout Create a series of contemporary uplifting spaces and places while retaining the important heritage aspects of the building and of the Institution. Introduce facilities appropriate to the beginning of the 21 century Capitalise on the riverside location and exploit the stunning views Optimise the revenue earning potential for functions and events Project Team Team Role Architect Services Engineers Structural Engineer Quantity Surveyor Contractor Company Pringle Richards Sharrat MTT Limited Alan Baxter Associates Rider Hunt Gilbert Ash 3

4 Sustainability Innovation at Savoy Place Overview As part of its role to share and advance knowledge to promote science, engineering and technology, the IET actively engaged with the Building Research Establishment (BRE) and others to explore current and emerging best practice in sustainable refurbishment. This engagement has allowed lessons learnt from project experiences at Savoy Place, along with the wider knowledge that the IET has in the Built Environment Sector, to be shared to the benefit of all. Project Team dialogue with the BRE A Sustainability Review of the proposed scheme was undertaken starting in June 2012 between the Project Team and sustainability experts from the BRE. This explored a range of issues under the headings of energy performance, sustainable materials, benefits of refurbishment to building users, building performance monitoring and innovation, appearance, cost and information/technology insight The Sustainability Review also set out an aspiration to substantiate any claims about the environmental performance of the building by benchmarking it against an appropriate and recognised scheme and to inform the development of the project in response to recommendations arising from that exercise. Site Visits BRE Innovation Park and Arcola Theatre As part of the Sustainability Review, in May 2012 the Project Team visited the BRE Innovation Park in Watford, a showcase of sustainable buildings and hundreds of low carbon products, materials and technologies. The Victorian Terrace (supported by The Department of Energy and Climate Change) gave useful insight into measures to improve the energy performance of hard to treat heritage buildings whilst retain their original character a living laboratory demonstrating the latest processes, materials and technological advances in sustainable refurbishment. The Project Team also visited the Arcola Theatre in Dalston the world s first Carbon Neutral theatre to understand how sustainability is integrated in to the core ethos of this arts and community venue and to visit their Clean Energy Technology Incubator. 4

5 BREEAM Non Domestic Refurbishment Pilot Project Whereas Savoy Place is being assessed under BREEAM 2008, a key outcome of the engagement with the BRE was work to help develop their new BREEAM standard for sustainability in historic building refurbishments, with Savoy Place used as a key pilot case study. Through close liaison with the Project Team and BREEAM assessor, a detailed review of the design was undertaken against the BREEAM Refurbishment criteria to identify and document the key challenges and achievements for the project, with a focus on the more challenging and sensitive issues to achieve in historic buildings. These issues included improving daylighting, air quality, building fabric and services and use of sustainable materials in order to understand the restrictions and opportunities. The pilot study looked at how sustainability standards can be set for historic buildings by testing out strict environmental criteria now adopted in BREEAM Refurbishment and Fit Out on the design proposals for Savoy Place. A description of the contribution of the Savoy Place to this process now features on the BRE website and in their publication Sustainable Refurbishment of Heritage Buildings 5

6 BREEAM Rating and Score Overview BREEAM (the Building Research Establishment Environmental Assessment Method) is an independent, transparent environmental labelling scheme for new build and major refurbishment projects. It assesses the environmental quality of a project by considering the broad concerns of climate change, use of resources, pollution and impacts on biodiversity. The BREEAM scheme assesses the scheme at both the design and post construction stages. The post construction review serves to confirm the interim assessment (done at the design stage) and, most importantly, that the as built performance matches that envisaged at the design stage. An overall rating of the building s performance is given using the terms Pass, Good, Very Good, Excellent, or Outstanding. BREEAM Scheme BRE have confirmed that Savoy Place should be assessed under BREEAM Bespoke BREEAM Bespoke is also known as BREEAM Other Buildings. Presently, all refurbishment projects are still assessed under the BREEAM 2008 schemes, as BREEAM 2011 is for new construction only. It is expected that BRE will launch BREEAM 2012 for refurbished building later this year, but other than generally being more onerous, no details of what the scheme will contain have been published. Based on the changes for new building between BREEAM 2008 and BREEAM 2011 New Construction, it is likely that a rating (say from Very Good to Good ) would be dropped by the same project if scored under the newer scheme. 6

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8 BREEAM Scoring A BREEAM Bespoke 2008 Rating of Very Good is to be achieved; the score currently targeted is 58.60% Maximum % Outstanding 85.00% Excellent 70.00% Savoy Place 58.60% Very Good 55.00% Good 45.00% Pass 30.00% 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Target BREEAM Rating Very Good (58.60%) Savoy Place Maximum Man. H & W. Ene. Trans. Water Matls. Waste LUE Pol. Target BREEAM Scores by Category 8

9 Key Innovative and Low Impact Design Features of the Building Overview Building Fabric Measures Potential Measure Enhance Glazing Insulation (double, low e, triple...) Fit Draught Stripping Around Windows/Doors Shading Devices to Reduce Heat Gain Enhancement of Insulation to External Wall Construction Roof Insulation Floor Insulation Use Pale Colours In Walls And Ceilings Typical Approach Secondary double glazing Reglazing existing window units; replacement of single glazed panes with double Replacement of complete double units with glazed units Replacement of complete units with triple glazed units Internal blinds manually operated Internal blinds automatically operated External blinds Brise soleil Filling existing cavity wall with insulation injected cavity wall Internal lining of external walls with insulation and dry lining Over cladding building externally with insulated panels Installation of additional insulation within existing pitched roof construction Insulation of existing flat roof construction; additional existing roof covering insulation overlaid on Insulation of existing flat roof coverings replaced construction; roof Insulation of existing flat roof construction; roof coverings replaced Application of additional insulation within floor finish 9

10 Building Services Measures Potential Measure Energy Efficient Lighting Lighting Control Zones Daylight Sensors Enhance daylight by placing lights where they are most cost effective. Adjust lighting levels to type of activity undertaken Reflective Baffles for Luminaires Upgrade to More Efficient Boiler Optimise Heat Recovery Optimise Pipe Sizes and Layouts to Reduce Resistance to Fluid Flow Upgrade Pumps Heating Control Zoning Upgrade Mechanical Ventilation System Ventilation System Optimisation Upgrade Chillers/Cooling Plant Typical Approach Upgrading of existing lamping Up grading of luminaires Installation of movement sensors Installation of sensors May be provided by discrete task lighting in existing situations or incorporated within a fundamental lighting redesign By use of thermal wheel, plate heat exchanger or run around coil Optimise Length and Size of Hot Water Pipes, Recirculate Mains Circuit LTHW (low temperature hot water) Options include: Tempered fresh air supply system, Full Mechanical Ventilation Optimise Duct Sizes And Layouts To Reduce Resistance To Fluid Flow Option; Ammonia chillers in lieu of air or water cooled chillers Specific Energy Efficiency Measures Potential Measure Building Energy Management System (BEMS) Maintenance Plans and Energy Audits Energy Efficient Policies and Staff Awareness And Training Building Energy Management System (BEMS) Typical Approach As a part of building management plan As a part of building management plan 10

11 Energy Low and Zero Carbon Energy Systems Measures Potential Measure Solar Water Heating Combined heating and Power (CHP) or Combined Cooling Heating and Power (CCHP) Ground Source Cooling Micro Wind Turbines Photovoltaics Typical Approach Roof mounted tiles Various configurations are possible, depending on availability of land and local ground conditions. Roof mounted tiles Water Measures Potential Measure Meter Consumption Implement a Water Management Plan Rainwater Recycling Grey Water Dual Flush Toilets Aerated Taps/Flow Regulated Taps Optimise Length and Size of Water Pipes Place Hot Water Pipes Above Cold Water Ones to Reduce Heat Transfer Reed Bed Water Treatment Drainage Irrigation Insulation on Heating/Hot Water Pipes Typical Approach Provision of water meters and as a part of building management plan As a part of building management plan Recycling hot water main with short tails to individual outlets to minimise volume of water required to run before reaching desired temperature; recirculating mains circuit Waste and Building Materials Measures Potential Measure Carpet Selection Vinyl Flooring Selection Underlay Selection Plasterboard Replacement Typical Approach Provision of water meters and as a part of building management plan As a part of building management plan 11

12 Ecology, Biodiversity and Land Use Measures Potential Measure Green Roof Green Wall Bird and Bat Boxes Perches and Voids Additional Rooftop or Terrace Planting Enhanced External Landscaping Water Features Typical Approach Extensive (shallow substrate usually planted with sedum, grass or moss) or intensive (deep substrate capable of supporting larger p ants, can be used as a garden or park) External vertical planting structure or terrace planting Ponds, swales and fountains Final Selected Measures Improved lighting efficiency including daylight control throughout is a reasonable target for the building. Internal gains can be reduced by specifying energy efficient equipment, lamps and luminaires, or controls to switch off lighting/equipment when not required. Where practicable, the IET office spaces should have openable windows, enabling natural ventilation for the occupants as current ambient conditions allow and providing a 'future proofed' cooling strategy should local noise and air quality conditions improve Providing a high level Energy Management Strategy for building management, particularly with respect to optimising the building s operation, small power loads and equipment should be seen as a priority for the building. As far as possible, areas of the building shall be metered separately to encourage energy efficiency and responsible use of heating, cooling, ventilation and lighting. A high efficiency mechanical ventilation heat recovery (MVHR) system should be installed where possible to air handling units serving the building. Specific Fan Powers of W/l/s, heat exchanger efficiency of 65% or more are possible for the building. 12

13 Costs Element Total Building Cost Based on the Contract Sum of 20,485, and a GIA of 8,875m2 M and E Services Based on the Contract Sum value of the services of 10,131,950 (including additions for GA Prelims and OHP) External Works (Inc Drainage and Ext Services) Based on the Contract Sum value of the external works of 81,413 (including additions for GA Prelims and OHP), Cost /m 2 2,308 / m 2 1,142 / m 2 9 / m 2 Functions and Areas Function Area m 2 Arrival Hall and Foyers 167 Reception Desk 33 Offices 504 Meeting Room 185 Conference and Events 983 Council Chamber and Lecture Theatre 285 Library 373 Catering Station 233 Kitchen 138 Kelvin Lounge 173 Bar 24 Staff Changing 70 Breakout/Exhibition Space

14 Construction Management Techniques to Reduce Environmental Impacts A requirement of the BREEAM assessment is to publicise to relevant stakeholders information relating to the aspects of the design and procurement which will reduce the building s overall environmental impact. Construction has been planned and executed to minimise the impact of the work on the environment. Steps taken include: The contractor and site are registered under the Considerate Contractors Scheme with regular inspection. The contractor is committed to going beyond best practice under this scheme and is aiming to achieve a score of more than 32 points The contractor has implemented a construction site waste management plan to maximise the amount of waste that will be recycled and reused The contractor is committed to monitoring site energy and water consumption and to implementing best practice procedures to minimise dust (air) pollution and water pollution Recycling facilities are provided in the building and onsite The construction elements are all Green Guide A or A+ rated Specific Measures implemented during construction to reduce environmental impacts include Metered Temporary Services Segregation of Site Waste Recycled Timber used for site hoardings Constant monitoring of site noise (sound insulated tools and silenced plant to be used Site dust (wet cutting used to reduce dust) Accurate measurement of site materials to minimise waste Labour, plant and materials will use local suppliers. 14

15 Next Steps To understand the ongoing sustainability performance of the completed Savoy Place, it is proposed to assess the building under the BREEAM In Use standard. BREEAM In Use assists property managers and occupiers to drive sustainable improvements through effective building management. It seeks to reduce operational resource use (energy, water, materials), improving the wellbeing, productivity and satisfaction of people working and visiting in the building and helping bridge the 'performance gap' between modelled performance and that experienced in use. It provides independent third party certification of a building s sustainability, contributing to corporate social responsibility, business reporting and sustainability leadership. 15