constructing excellence: gallions ecopark 25 th october 2005 rebecca miller sustainability manager
TRANSCRIPT
Constructing Excellence:Constructing Excellence: Gallions Ecopark Gallions Ecopark
2525thth October 2005 October 2005
Rebecca Miller
Sustainability Manager
Why did we build Ecopark?Why did we build Ecopark?
Commitment to environmental sustainability
Accent on innovation
Replicable project not just a ‘one off’
The big picture…
Why it makes sense to build Why it makes sense to build environmentally sustainable homesenvironmentally sustainable homes
Low Carbon, energy efficient homes are better for the environment
Energy efficient, well insulated homes can help reduce incidents of fuel poverty
Lower consumption of energy means lower utility bills which is a great selling point for private developers and a great incentive for housing associations
Water shortages across the South East
Improve tenants’ health levels
Ecopark AimsEcopark Aims
Transfer the best of European thinking into a UK setting
Affordable project that can be replicated
Conduct an experiment – human & scientific & share results
Project that can reduce costs for consumers
Not about cutting edge technology
Tried & trusted materials
Raise awareness in UK
Why is Ecopark a good example of an Why is Ecopark a good example of an environmentally sustainable?environmentally sustainable?
Dutch Green Financing Model Pass
EcoHomes ‘Excellent’
Focus on reducing energy demand and water consumption
Gas in comparison to electricity is better for the environment and better in terms of cost
Ecopark is a realistic, pragmatic approach to environmentally sustainable development.
Haven’t tried to ‘push the boat out’
AffordabilityAffordability
Common complaints about building sustainably are that it costs too much
Practical, cost-effective approach to environmentally sustainable development
Ecopark achieved cost parity in comparison to our traditional new build schemes and was developed for £1,056/m²
Financial Analysis has been published and can be downloaded off website www.gallionsecopark.co.uk
Predicted Savings Predicted Savings
Expected energy consumption reduced by 50%
CO2 emissions reduced by up to 60%
Water use reduced by up to 50%
Monitoring will give scientific results
Consultation will give human results
Site PlanSite Plan
Ecopark Specification - ComponentsEcopark Specification - Components
Walls - double insulation, U value 0.25.
Windows - Argon gas filled double glazing achieves U=1.1w/m2k
Ecopark Specification - ComponentsEcopark Specification - Components
Heating - Aqua-sol solar collector panels for preheating domestic water
- Valient Eco max gas condensing boilers - 83-98% efficient
- Radiators - 70/40 short DHW piping low temperature heating
Specification - ComponentsSpecification - Components
Sun rooms - South facing properties to heat incoming air
Additional Energy/Water Saving FeaturesAdditional Energy/Water Saving Features
PV powered street lights
Energy Efficient lights used internally
Designed to maximise solar gain
Lower energy mechanical ventilation and heat recovery units
Water butts for rainwater harvesting
Spray taps fitted with flow restrictors
Ultra-low flush toilets
Small, low volume baths
Water saving showers
Monitoring and EvaluationMonitoring and Evaluation
Telemetric monitoring systems installed in each house type collecting data on:
Solar collector output, temperature and humidity, energy consumption – extraction and heat recovery systems, onsite weather station
Resident Liaison Interviews: 20 out of the 38 houses have been evaluated to review the practical success of the homes
Dutch Green Financing Report
Financial Analysis Report
Recorded SavingsRecorded Savings
Up to 60% reduction in gas billsUp to 45% reduction in electricity billsSolar thermal unit provides pre-heated domestic hot water30% reduction in water consumption
Types of Monitoring – TelemetricTypes of Monitoring – Telemetric
4 houses fitted with telemetric data-loggers for remote collection:
Temperature and humidity
Energy Consumption – heat recovery and ventilation systems
Water flow – production from solar collectors
Weather station on site to put information into context
Energy and water bills collected from 22 of the 38 occupied properties
Types of Monitoring - HumanTypes of Monitoring - Human
‘Toolkit for Collecting Feedback from Tenants Living in Innovative Housing’ devised by BRE and Sustainable Homes19 of the 38 occupied properties reviewedEcopark Manager met and interviewed all residents – interviews lasted approximately 1 hour each and covered a wide range of subject areasEach house type was represented as follows:
Block A – 4 out of 13Block B – 5 out of 9Block C – 6 out of 9Block D – 4 out of 8
Results of Energy ReportResults of Energy Report
Good savings are being made on gas and water, but electricity consumption is higher than expected –
Due to solar collectors being accidentally over-ridden by switching off he solar and in effect turning on the emersion heater
Better ventilation is needed for houses with sunspaces
Humidity within properties meets recommended conditions for a comfortable indoor climate
Houses outperform specifications for air-tightness
Results of Tenant Feedback ReportResults of Tenant Feedback Report
Overall feedback is that the tenants are very happy with the homes
Almost 1/4th residents have reported annual energy savings of £250 on their previous dwellings
One tenant recorded annual saving of £536 in contrast to previous dwellings
All tenants are experiencing some form of reduction in utility bills
Most instances where difference is small the tenant has moved from a smaller property into a larger one
ConclusionConclusion
Constructing Excellence ‘Demonstration Project’ Status
DGFM Pass
EcoHomes “Excellent” rating
Gold Award ‘Best Energy Saving Development’ – What House Awards
Overall purpose – Inform Debate and Educate
Exhibition CentreExhibition Centre
Dissemination strategy IGPG
School children to Academics to Politicians
Practical explanations, seminars etc
Exhibition space with meeting facilities
More information on EcoparkMore information on Ecopark