Power Engineering International
Summary
In what has been hailed as a landmark moment for renewable energy in Cornwall and the UK, the Eden Geothermal project has been opened and is now generating heat.
Drilling was completed in 2021 and now the heat main and plant – the UK’s first operating deep geothermal heating plant since 1986 – are ready to supply heat to the Eden Project and its new nursery, Growing Point.
The project is being built by Eden Geothermal Ltd, a venture consisting of three partners; Eden Project, EGS Energy Ltd, and Bestec (UK) Ltd.
The Eden Project includes a well with a vertical depth of 4,871 metres (just over 3 miles).
According to Eden Geothermal Ltd, the geothermal heat system is a single-well coaxial system. A 4000m vacuum-insulated tube inserted into the well lifts hot water from below. This water is passed through a heat exchanger and the cooled water is then re-injected into the well via the outer ring.
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