How much will a ground source heat pump borehole system cost for a large holiday lodge development?
A shared ground loop array ground source heat pump system with boreholes for 103 holiday lodges could cost £1,100,000 and earn £2,000,000 via the Non Domestic Renewable Heat Incentive.
The costed example below reviews how the costs and savings breakdown for a development of 103 holiday lodges featuring a Shared Ground Loop Array of boreholes serving a mix of Kensa Shoebox heat pumps and Kensa Evo Heat Pumps compared to an LPG boiler alternative.
Example: Project & Finances
Kensa has calculated example costs to illustrate the upfront finance required for Shared Ground Loop Arrays featuring boreholes connected to Evo heat pumps in a small development of four holiday lodges, compared to an LPG system.
Expected running costs and Non-Domestic Renewable Heat Incentive (RHI) income are also included.
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Heat Pump Specification
|System architecture||Shared Ground Loop Arrays|
|Total heat pump capacity||515kW|
|Equipment type||x103 units - Shoebox and Evo Mix|
|Potable DHW temp||60°C|
|Integral immersion heaters||No (DNO friendly)|
|Ground array type||Boreholes|
|Land area required||Groups of lodges fed by clusters of boreholes|
*Boreholes based on average ground conductivity
Total Project Costs, Savings & Returns vs LPG
| ||Kensa Shared Ground Loop Array & GSHP||LPG Boiler|
|Lifetime Expectancy: Appliance||Up to 20 years||Up to 10 years|
|Lifetime Expectancy: Infrastructure||Up to 100 years||-|
|Carbon Saved (over 20 years)||5,000,000 tonnes||0 tonnes|
|Local NOx emissions*||0kg NOx/y||51.91kg NOx/y|
|Appliance & Infrastructure Cost**||£1.1m to £1.3m||£100K|
|Running Costs (over 20 years)***||£1.9m to £2.1m||£2.3m to £2.6m|
|Servicing Costs (over 20 years)****||£0||£2K|
|RHI Income (over 20 years)*****||£2m - £2.5m||Not eligible|
|Net cost (after 20 years)******||£900K - £1m||£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.
For illustrative purposes only
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…