Boreholes

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.

For more information, call sales on 0845 680 4328.

Schematic drawing*

*For illustrative purposes only

Costed example

Cascaded system utilising boreholesHeat pump architecture
Heat pump architectureCascaded central plant
Total heat pump capacity120kW
Equipment type3x 45kW Plant Rooms
Design conditions0/50°C
Potable DHW tempSpace heating only
Integral immersion heatersNo
Ground array typeBoreholes
Boreholes required*2700mtrs
Land area required2000sq/m
Equipment supply costs**£75-90K
Borehole installation, drilling & trenching costs***£142-145K
LPG external costs & boiler equipment£15K
Total 20 year NDRHI funding****£350-500K
Estimated heat pump 20 year running costs*****£350-400K
Estimated LPG running costs******£450-550K
Heat pump lifetime expectancyHeat pump 20 years - pond mats 80 years
Heat pump annual servicingNot required
Projected carbon saving800 tonnes
*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

Coming soon!