What is a shared ground loop array?
Kensa’s Shared Ground Loop Arrays (SGLAs) are a form of ultra-low temperature Heat Network for use with ground source heat pumps.
Mimicking a traditional gas framework, a series of ground arrays, typically boreholes, are linked together to form a shared ground loop array acting as a heat energy source to multiple properties.
Unlike a traditional district heating system, the heat network does not lose heat as it is distributed around the streets so there is not any waste. Each home can choose their energy supplier, there is no heat metering and no need to generate more heat than is needed by each house.
The shared ground loop system transfers low grade heat energy from the ground to individual ground source heat pumps located inside each individual dwelling.
Each ground source heat pump then upgrades the ground’s heat energy to provide independently controllable heat and hot water to the property.
Essentially, a heat pump borehole is a vertical array or collector used to collect heat energy from the ground for use with a ground source heat pump. Boreholes provide significant space savings and minimize disruption to heat pump installation projects, since they only require 150mm of garden space per borehole. Borehole depths typically range from 60 to 200 meters.
With Kensa’s Shared Ground Loop Array, we prefer to use boreholes for clusters of properties connected via shared ground loops.
In general, one borehole is needed per property. However, a deeper borehole could serve two properties in Shared Ground Loop Array schemes.