Hello,
we actually wanted to use our air-to-water heat pump to actively cool through the underfloor heating as well, but unfortunately forgot to inform the electrician about this.
He said we would need room thermostats that allow switching between heating and cooling.
However, the plastering is already done, so the wiring cannot be changed. As a result, we have too few wires for thermostats with a changeover switch.
Is it possible to simply turn the thermostat all the way up and set the heat pump to cooling? Or would that cause problems with condensation on the floor?
Are there any other options?
Best regards,
Daniel
we actually wanted to use our air-to-water heat pump to actively cool through the underfloor heating as well, but unfortunately forgot to inform the electrician about this.
He said we would need room thermostats that allow switching between heating and cooling.
However, the plastering is already done, so the wiring cannot be changed. As a result, we have too few wires for thermostats with a changeover switch.
Is it possible to simply turn the thermostat all the way up and set the heat pump to cooling? Or would that cause problems with condensation on the floor?
Are there any other options?
Best regards,
Daniel
D
daniels8727 Aug 2016 14:23@Axel85: In theory, you could significantly lower the supply temperature, but condensation would form on the floor. Nevertheless, there is still some effect. A 3-4°C (5.4-7.2°F) difference is definitely achievable, and in my opinion, that is sufficient for the summer.
D
daniels8727 Aug 2016 14:29The problem only arises if all thermostats are simply turned up fully, as there would effectively be no regulation anymore. At night, for example, the heat pump still operates, and with temperature fluctuations, you would constantly have to adjust the supply temperature in summer. Right?
Grym schrieb:
Alex, this works perfectly with an air-to-water heat pump. It’s called active cooling and provides more than just the passive cooling from the ground loop.You’ll really have to explain that to me in more detail. I haven’t quite understood it yet. 🙂
You have to transfer the warm indoor air to the water in the underfloor heating system. That’s the tricky part. The heat pump can only release heat from the water to the outside air. A ground-source (water-to-water) heat pump would clearly have an advantage here, since the cold ground loop provides a medium to lower the temperature of the water in the underfloor heating system.
Or do you mean by "active cooling" blowing cooled air into the rooms and/or cooling the water in the underfloor heating? Then we’re no longer talking about a reversible heat pump but about an air conditioning system?!
Where does the coolness come from? 🙂
D
daniels8727 Aug 2016 14:53The underfloor heating system releases energy to the indoor air during winter and absorbs energy from the indoor air in summer.
The only minor difference is that warm air rises, while cold air sinks. However, since gases tend to reach a homogeneous state, this effect is not very significant at the current supply temperatures.
The only minor difference is that warm air rises, while cold air sinks. However, since gases tend to reach a homogeneous state, this effect is not very significant at the current supply temperatures.
daniels87 schrieb:
The underfloor heating releases energy into the indoor air during winter, and in summer it removes energy from the indoor air.But only near the floor...
daniels87 schrieb:
The only small difference is that warm air rises. Cold air sinks to the floor.Unfortunately, this is not a small difference but the biggest one, and also the main problem. For this reason, chilled ceilings are usually installed instead of chilled floors to effectively cool buildings.
The fact that a heat pump can do this is of course not bad... however, the desired effect will likely not be achieved.
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