ᐅ Comparison of Geothermal Heat Pump and Air-to-Water Heat Pump
Created on: 8 Aug 2020 22:33
M
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)...
Tolentino schrieb:
Yes, but I haven’t figured out which ones yet. Depending on the groundwater level, collectors might not work either. After all, there is still coolant in the ground...If the ground is moist enough, they are supposed to be even better than deep drilling. We’ll see.
Yes, it actually failed for me because of that. I would recommend using a search engine and entering some relevant keywords. Additionally, try researching in another forum that specializes in this topic. Look for “ring trench collector.”
The problem is that regulations vary greatly by region and, in the worst case, depend on the individual case officer.
Try searching for the local water protection authority for your district. Often, they provide an information sheet.
In my case, they were very strict and precise. This means that approval would generally be possible, but I would have had to meet certain conditions or provide proof. For example, a soil report with infiltration rates. If this value isn’t very low (for instance, in clay soil), I would have had to add an artificial impermeable layer under the collector, such as bentonite. But that adds significant cost. It wouldn’t have made sense financially, and the application still might not have been approved. This, along with a few other factors, led me to abandon the idea.
The problem is that regulations vary greatly by region and, in the worst case, depend on the individual case officer.
Try searching for the local water protection authority for your district. Often, they provide an information sheet.
In my case, they were very strict and precise. This means that approval would generally be possible, but I would have had to meet certain conditions or provide proof. For example, a soil report with infiltration rates. If this value isn’t very low (for instance, in clay soil), I would have had to add an artificial impermeable layer under the collector, such as bentonite. But that adds significant cost. It wouldn’t have made sense financially, and the application still might not have been approved. This, along with a few other factors, led me to abandon the idea.