Go with the flow
Ground source heat pumps work especially well with non-tidal water sources, such as lakes, ponds and rivers, as water is an excellent conductor.
Kensa has used ground source heat pumps very effectively to extract heat energy from a variety of non-tidal water sources to provide heating and hot water to residents on the shoreline.
Water collectors have a number of advantages:
- The heat transfer rate from water is higher than that in the ground;
- The water is in close contact with all of the pipe at all times enhancing it’s efficiency;
- The flow/circulation of water provides constant energy replacement;
- The use of a water source removes the need for digging or drilling, reducing the cost and duration of the installation;
- The return temperature to the heat pump is generally 5-6°C higher than ground collectors, increasing the efficiency of the heat pump.
How do you extract heat energy from the water?
Typically non-tidal water collectors take the form of closed loop Kensa pond mats constructed of slinky pipe attached to corrosion resistant stainless steel frames which are sunk to the bottom of the water source or secured underneath a floating pontoon, however open loop methods can be employed using straight pipe or two separate boreholes.
Boreholes can also be used to extract energy in certain uses of non-tidal water sources.Read more about pond mats