If a commercial premises has a high demand for heating and hot water, then modular cascaded ground source heat pumps provide an effective solution to meet the heat load of the property.
Ground source heat pumps aren’t a one size fits all technology – they can be used in a wide variety of different scenarios. Kensa has launched a new suite of online resources to help customers identify which application of ground source technology would be the best fit for their project.
If a commercial premises has a high demand for heating and hot water, then an effective solution is to link a number of modular ground source heat pumps together in a cascaded system to meet the heat load of the property.
Kensa Sales Manager, Paul Dennison, explains: “Any high heating load can be matched with a cascaded system, as the central ground array, whether it be coiled slinky pipe, boreholes or pond mats, is sized to deal with the peak heat demand.
“This solution is becoming increasingly popular in commercial applications, such as in golf clubs, care homes and garden centres, where multiple heat pumps housed in a central plantroom can satisfy demand for large volumes of heat and hot water.”
Cascaded ground source heat pumps offer greater flexibility & increased efficiency
Cascaded ground source heat pump systems are designed to adjust between minimum and maximum heat demand as needed. This means that the system is highly efficient as it always produces the required amount of heat and hot water.
For example, in winter a project might need 100kW of heat to satisfy demand, however during the spring and summer the need for heat may be more like 40kW. In order to avoid inefficiencies, a cascaded ground source heat pump system comprising of two 50kW units might be installed. When a load greater than 50kW is needed, then both heat pumps will operate to fulfil demand, whilst only one need usually operate in the summer.
Cascaded systems can also be designed to satisfy both space heating and domestic hot water demands at the same time. These types of systems feature multiple ground source heat pumps with one or more dedicated to the production of domestic hot water only, and the remaining units dedicated to the space heating load. Specialist high temperature ground source heat pumps can be used to produce the domestic hot water, removing the reliance on immersion heaters. It is possible to have these types of cascade systems comprising of three, four or even more heat pumps where the domestic hot water and space heating loads are split again.
Seamless operation & guaranteed payback from the RHI
Kensa’s Commercial Plant Room series comprises of modular three phase ground source heat pumps from 25kW up to 75kW, perfect for cascaded systems when combined together to more closely match the heat demand of a building.
Having more than one heat pump offers a degree of redundancy; in the unlikely event that one breaks down, the system will continue to operate. Although the full heat load cannot be met, a degree of heat can be maintained until the faulty unit can be replaced. It also means that engineers can work on each individual heat pump separately, whilst the rest of the system remains operational.
Projects using cascaded ground source heat pumps are eligible for the Government’s Non-Domestic Renewable Heat Incentive (RHI) which provides a guaranteed quarterly income for 20 years based on the actual heat output of the system.
For more information on cascaded ground source heat pumps
More information on cascaded ground source heat pump systems, including example project costs, schematic drawings, and different ground array configurations, can be found here.