| What's it all about? |
St Mary's Church, Welwyn has recently built an extension to the church building to provide meeting rooms and facilities for the congregation and the community. The new building, Church House, and the church itself are heated by Ground Source Heat Pumps.
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To reduce the amount of Carbon Dioxide released into the air and save on heating bills in the long term.
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Because Carbon Dioxide is a Greenhouse Gas and is causing Climate Change.
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It is estimated we shall avoid releasing around
30 tonnes of Carbon Dioxide a year.
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Heat pumps are more normally used for industrial cold stores. In our case three electrically driven heat pumps are connected to a system of pipes drilled into the churchyard. From them they collect ground heat which is compressed to a higher temperature and used to heat the church buildings. For every unit of electricity used by the heat pump, we get around 3 units of heat.
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In many countries lots of people do. There are hundreds of thousands of them throughout USA and Europe. They are more expensive than a gas boiler and drilling the boreholes is an extra cost.
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The system cost us around £50,000.
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Yes! Initial results are in line with the performance predictions made from theoretical studies and from measurements of the earlier church heating system over the two previous winters
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Real-time information is available to Registered Users on this website
and, if there is sufficient interest, we plan to run a
number of Open Days at which the performance results and the
technical details of the installation will be provided. St Mary's installation includes meters to measure the electricity consumed by the heat pumps and the heat they provide.
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You can contact us by clicking here.
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