Andrew Grimsley, Nu-Heat’s Technical Director, clarifies how this can be achieved:
“There are many factors to consider when designing any combined underfloor heating and also heat pump system, however how successful it is will certainly basically depend on the padding levels of the property and, which means flow temperature the heat pump motor has to generate. ” To find out more about goedkoopste vloerverwarming prijzen click here.
Circulation temperatures
All heat pump motor types operate using similar principles – by collecting energy from the environment and ‘compressing’ it to a temp that can be used for a home’s trouble and heating needs.
The largest single factor impacting the efficiency of a high-temperature pump is the flow temp that it is asked to produce. The bigger this temperature, the more work the compressor can accomplish and the less efficient.
As a result, a heating system that could operate with lower movement temperatures, such as underfloor home heating, which typically operates at around 55oC, allows the pump to maximize its efficiency and minimize carbon production and energy costs to the homeowner.
Whenever underfloor heating systems tend to be specifically designed to be fed with a heat pump, additional tubes and more efficient floor buildings can be used to allow even reduced flow temperatures, typically 35oC – 45oC, whilst nevertheless achieving the required air temperatures inside the property (averaging twenty-one oC in living areas).
Due to the smaller surface area from the heat emitter, a conventional rad system requires a significantly greater flow temperature to achieve the same internal air temperature. As a result, underfloor heating and temperature pumps are perfect spouses as they are both well suited towards the low temperatures involved in making the most of efficiency.
When operating UFH with a GSHP, open circulation weather compensated system is favoured. An external sensor examines any deviation in outside temperature, comparing flow and return temperatures on the UFH, then adjusting accordingly.
Padding, insulation, insulation!
With underfloor heating, warmth passes into the room from the floor, which is important to reduce creating heat loss, including downwards heat losses into the floor or the floor below. Current changes to Part L from the Building Regulations have concentrated attention on the importance of insulating material levels within domestic houses.
In a new building that meets the regulations, there will probably always be an adequate level of floors insulation. In these instances, pumps can provide 4 to five kilowatts of free energy for every single 1 kilowatt of electric power used to power them.
Normally, the aim should be to insulate the home so that less than 50 m of heating is required for each square meter of living area. This will then ensure that typically the UFH water temperatures might be kept to a minimum, and the high-temperature pump can operate at the higher Coefficient of Functionality (COP) -typically four rapid 5 for a ground resource unit.
In general, it is less expensive to increase insulation levels than install a larger pump motor and buildings that surpass the requirements of Part T of the Building Regulations tend to be most suitable.
In theory, there is nothing to avoid a heat pump by working in a building with a higher heat loss, like a property requiring up to eighty watts per square inmiscuirse.
However, higher heat reduction requires higher heating drinking water temperatures from the heat pump motor – typically 55°C instead of 35 – 45°C, which means the heat pump’s COP can experience although the heat pump might still be sufficient to temperature the property.
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