This section provides details of an example project featuring a cascaded ground source heat pump system fed by a borehole ground array.
We have provided schematic drawings, example costs and a real-life case study to showcase how a cascaded ground source heat pump system architecture designed by Kensa can effectively meet a high commercial heating and hot water load.
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*For illustrative purposes only
|System architecture||Cascaded central plant|
|Total heat pump capacity||120kW|
|Equipment type||3x 45kW Plant Rooms|
|Potable DHW temp||Space heating only|
|Integral immersion heaters||No (DNO friendly)|
|Ground array type||Boreholes|
|Land area required||2000sq/m|
*Boreholes based on average ground conductivity
**A cost range is depicted here as every project is different and can contain more design features than shown in this example
***Installation costs for external kit only (costs to install internals equivalent to a traditional system)
****NDRHI is a 20 year index linked funding stream which assumes inflation at 3%
*****Based on electric at 15p/kW/hr and COP of 3
******Based on LPG at 40p litre and 85% efficiency
Case study: Charlestown School
Located next to a busy railway line this school required an efficient heating and cooling system that could operate all year round. The solution was to install an 80 kW cascaded ground source heat pump system connected to ten boreholes located underneath adjacent playing fields. Overall heating costs have been reduced by 75%.
- Retrofit installation of 1960s building;
- Cascaded ground source heat pump system;
- 80kW Kensa Plantroom heat pumps;
- Providing heating and cooling;
- 10x boreholes under playing field;
- 75% reduction in heating costs.