ᐅ Comparison of Geothermal Heat Pump and Air-to-Water Heat Pump
Created on: 8 Aug 2020 22:33
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mjammjammjam
Starting point: In the builder’s cost estimate, an air-to-water heat pump Nibe F2040 with a 180-liter (48-gallon) hot water tank is listed. Additionally, there are electric towel radiators and appropriate insulation to meet KfW-40 house standards. This package is supposed to cost us €13,900.
After some research, I found out that ground source heat pumps have a higher annual performance factor. According to the builder’s catalog, the air-to-water heat pump has a COP of 3.6, while the ground source heat pump has at least 4.5. In this case, it is a Nibe 1255.
Even though I don’t yet know the potential price for the 1255 from the builder, I would like to ask,
I look forward to your answers, as a non-expert I feel a bit lost here (at least I do right now)...
After some research, I found out that ground source heat pumps have a higher annual performance factor. According to the builder’s catalog, the air-to-water heat pump has a COP of 3.6, while the ground source heat pump has at least 4.5. In this case, it is a Nibe 1255.
Even though I don’t yet know the potential price for the 1255 from the builder, I would like to ask,
- what you paid for any borehole drilling for the ground loops?
- how the running costs compare between air-to-water and ground source heat pumps
- what you had to pay for your eligible Nibe units
I look forward to your answers, as a non-expert I feel a bit lost here (at least I do right now)...
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neo-sciliar13 Jan 2021 12:58General question regarding this: cooling using underfloor heating. Heating is fine. The floor is 2-3°C (4-5°F) warmer than the room, heat rises, the screed transfers the heat to the room. But: why does the screed also transfer cold to the room? Isn’t that significantly more energy-intensive than heating?
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BauBauNRW13 Jan 2021 13:02Fuchur schrieb:
You want to compare passive cooling with active cooling? The energy consumption differs significantly. In both cases, the cooling capacity is limited by the dew point.Not really.
As far as I know, an air-to-water heat pump can hardly or not at all provide cooling (for example, in the height of summer). With a ground-source (brine-to-water) heat pump, passive cooling is possible. That’s why I wanted to confirm if this is correct. It’s quite relevant, especially in times of climate change.
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WilderSueden13 Jan 2021 13:12Regarding the heat pump, I can’t say much, but the underfloor cooling works fairly well. We have it in the office. During the first summer, it wasn’t active or installed (landlord and contractors claim different things 😉), and it was almost unbearable. In the second summer, with the cooling on, it was noticeably better. However, it still remains warm, and you have to keep the windows closed from late morning onward; otherwise, it doesn’t work. And if you don’t have proper shading, it won’t work at all.
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BauBauNRW13 Jan 2021 13:24I don’t quite understand. So you actively cool down?
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T_im_Norden13 Jan 2021 14:34neo-sciliar schrieb:
But: why does the screed also release cold into the room? Isn’t that much more energy-intensive than heating?The screed does not release cold; it absorbs heat and transports it to the heating system. There, the heat is transferred via the heat exchanger to the medium (brine or air).Similar topics