Chelmsford Cathedral case study

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Chelmsford Cathedral case study

• Cathedrals and Climate Change
• 2nd November 2009
• Daniel Kenning CEng CEnv
• Principal Environmental Consultant
• Harrison Group Environmental

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Harrison Group Environmental

• Energy services
• energy efficiency and renewables
• Thermal modelling
• SAP, EPC
• Travel planning
• Ecology services
• Habitat surveys
• Bats
• Habitat creation and enhancement
• Work with local wildlife trusts
• Geotechnology, site investigation

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Driver 1 Carbon Dioxide CO2
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Driver 2 Energy Insecurity
Supply ?
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Phased review at Chelmsford

• 4 phases
• Chapter House
• Cathedral and Churchyard
• Cathedral Centre
• Residences
• 7 properties
• On-site and off-site

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Review Process

• Review of bills
• Site survey
• Energy
• Water
• Waste
• Transport

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Survey findings
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Review Process - Analysis

• Total electricity used 2005-2006
• 43,593 kWh/yr
• Measured floor area
• Approx. 500 m2
• Baseline demand and CO2 emissions
• 87 kWh/m2/yr, 36.7 kgCO2/m2/yr
• Comparison with industry benchmarks
• Community centres 147 kWh/m2/yr
• Further education classrooms 181 kWh/m2/yr
• Social clubs 200 kWh/m2/yr
• Step-by-step forecast for proposed measures

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Review Process - Recommendations

• Low cost
• Investment
• Strategic long term

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Low cost measures

• Simple monitoring and control strategy
• Energy-efficient and water-efficient equipment in
  new kitchen
• Design-in facilities for recycling
• Complete change to energy efficient lighting
• Travel plan for staff and visitors
• Energy awareness programme
• Hypothecation of savings for investments

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Example - Monitoring and Targeting

• Data collection
• Electricity
• Water
• Waste
• Travel
• Data analysis
• Reporting
• Action

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Investment measures

• Central heating with radiators and gas boiler
• Effective controls
• Effective insulation
• Hot water storage compatible with future solar
  system
• Designed to allow flexibility in future type of
  boiler
• Regenerative braking for lift
• Internal insulation on walls
• Replacement water efficient appliances in toilets

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Example Internal Insulation
100 mm glass fibre
Cold Bridge
40 mm polystyrene
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Strategic long term measures

• Electricity from zero carbon source
• Solar thermal system for hot water in summer

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Possible CO2 emissions reduction
Target for UK
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Next steps

• Modelling of the benefits of
• New insulation
• New heating system
• Cost analysis
• Implementation
• Monitoring
• Next three phases of the programme

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Modelling and Energy Profile
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Summary

• Carbon and Security
• Energy, water, waste, transport
• A strategic approach makes it feasible
• We would be pleased to help you too.
• Daniel Kenning
• daniel_at_harrisongroupuk.com
• 020 7537 9233