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 pond mat Shared Ground Loop Array can provide heating and hot water to multiple holiday accommodation buildings.
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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 Array|
|Total heat pump capacity||52kW|
|Equipment type||4x 13kW Evo's|
|Potable DHW temp||60°C|
|Integral immersion heaters||No (DNO friendly)|
|Ground array type||Pond mats|
|Pond mats required||14|
|Lake surface area - no flow||3500sq/m|
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)||300 tonnes||0 tonnes|
|Local NOx emissions*||0kg NOx/y||5.24kg NOx/y|
|Appliance & Infrastructure Cost**||£52K to £64K||£15K|
|Running Costs (over 20 years)***||£115K to £135K||£175K to £200K|
|Servicing Costs (over 20 years)****||£0||£2K|
|RHI Income (over 20 years)*****||£170K to £200K||Not eligible|
|Net cost excluding running & servicing (after 20 years)*****||£118K to £136K profit||£15K cost|
*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.
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…