Boreholes

This section provides a ground source heat pump design with schematic drawings and ground source heat pump installation costs for both self-financed and funded split ownership shared ground loop array options compared to LPG.

A real-life case study and ground source heat pump reviews showcase how individual ground source heat pumps linked by a borehole Shared Ground Loop Array can provide heating and hot water to multiple holiday accommodation buildings.

For more information, call sales on 0845 680 4328.

Example: Schematic

For illustrative purposes only

Example: Project & Finances

Based on the above schematic, Kensa has calculated example costs below to illustrate the upfront finance required for self-financed and funded split ownership Shared Ground Loop Arrays in holiday lodge developments featuring the Kensa Shoebox heat pump.

Also included are expected running costs and income generated via the Non-Domestic Renewable Heat Incentive (RHI) over a 20 year period (the duration of the Non Domestic RHI), compared to an LPG system. For a bespoke quote please click here.

Heat Pump Specification

System architecture Shared Ground Loop Arrays
Total heat pump capacity 515kW
Equipment type x103 units - Shoebox and Evo Mix
Design conditions 0/40°C
Potable DHW temp 60°C
Integral immersion heaters No (DNO friendly)
Ground array type Boreholes
Boreholes required* 15,000mtrs
Land area required Groups of lodges fed by clusters of boreholes

*Boreholes based on average ground conductivity

 

Total Project Costs, Savings & Returns vs LPG

  Self-Financed Funded Split Ownership  
Kensa Shared Ground Loop Array & GSHP LPG Boiler
Lifetime Expectancy: Appliance Up to 20 years Up to 20 years Up to 10 years
Lifetime Expectancy: Infrastructure Up to 100 years Up to 100 years -
Carbon Saved (over 20 years) 5,000,000 tonnes 5,000,000 tonnes 0 tonnes
Local NOx emissions* 0kg NOx/y 0kg NOx/y 51.91kg NOx/y
Appliance & Infrastructure Cost** £1.1m to £1.3m Details coming soon! £100K
Running Costs (over 20 years)*** £1.9m to £2.1m £1.9m to £2.1m £2.3m to £2.6m
Servicing Costs (over 20 years)**** £0 £0 £2K
RHI Income (over 20 years)***** £2m - £2.5m £0 Not eligible
Net cost (after 20 years)****** £900K - £1m Details coming soon! £2.4m - £2.7m

*NOx emissions based on 56mg/Kwh for gas and liquefied petroleum gas (LPG) boilers (1800 run hours)  **Costs are for the supply and installation of the Kensa heat pump and ground array only, and the supply and installation of the LPG boiler equipment only. Costs for supply and installation of internals such as radiators, underfloor and heating controls are not included, please speak to your plumbing contractor. ***Based on electric at 15p/kW/hr and COP of 3. Based on LPG at 40p a litre and 85% efficiency ****Ground source heat pumps have no requirement for annual maintenance. However, it is good practice for the heating distribution system to be proactively checked and maintained to ensure optimum performance. *****The NON-DOMESTIC RHI is a 20 year index linked funding stream which assumes inflation at 3%. ******Net cost for LPG does not include an additional LPG boiler, which will likely need to be  factored in during the 20 year comparison period due to the LPG’s 10 year average lifetime expectancy.

Related Content

Blog: Multiple buildings? Unlock Non Domestic RHI Funding

Homeowners and self-builders whose projects feature two or more domestic buildings on one site, could be earning themselves a profitable income by utilising a simple district ground source heat pump system architecture to unlock quarterly payments from the Government’s Non Domestic Renewable Heat Incentive (RHI) scheme for the next 20 years. More commonly associated with…