Hello,
here I would like to share some experiences and data regarding my brine heat pump and deep drilling, based in part on the expert’s "questionnaire":
a) What is the soil composition on your property?
Up to 3m (10 feet) silty, fine sandy, clayey soil
Up to 4m (13 feet) slope debris, rock fragments
Then bedrock (mainly limestone)
b) How deep was the drilling?
Drilled twice to a depth of 72m (236 feet)
c) How much did the drilling cost?
€10,400 including double U-probes DN25
Grouting material with 2.0 W/mK thermal conductivity
Permitting process (building permit / planning permission)
Pressure-tight house entry at the basement and underground routing of supply lines (about 25m (82 feet))
Filling/draining equipment, filling, pressure testing, etc. (all inclusive)
d) How much did the system cost?
System: Tecalor TTc 05 with heating output at B0/W35 of 5.8 kW and coefficient of performance (COP) of 4.8
Cost: €9,800
e) Were there any difficulties during installation, if so, what kind?
Because the water used to flush out the drilled material during drilling seeped away, a "small compressor" was needed to blow it out with air. However, it had to be placed on a neighbor’s property who had not yet started building. The machine was the size and approximate weight of a 20-ton truck but was off-road capable. This caused a 2-day delay because the compressor first had to be transported to our site. No additional costs were charged.
f) How is the daily operation?
"Like a refrigerator." Once the parameters on the heating system are correctly set, the only thing that should be done is occasionally reading the information/data such as operating hours and source temperature. Otherwise, it runs "on its own," just like any heating system. When the door is closed, the unit is virtually inaudible. Very discreet since, apart from the cabinet in the utility room, nothing else is visible (all brine pipes are underground).
e) What are the operating costs for which living area?
Currently, a living area of 180sqm (1937 sqft) is heated, plus an additional 65sqm (700 sqft) of cellar space within the insulated thermal envelope (these rooms are around 15-16°C (59-61°F) on the coldest days). From September 2014 to September 2015, 2,000 kWh of electricity was consumed for heating and hot water (2 adults, 1 baby, 1 toddler). The house is a KfW-70 standard building according to the 2009 energy saving regulations, which already met the required technical standards before the central ventilation system with enthalpy heat exchanger was installed (we decided to add this after the initial applications).
f) to be continued ....
Note regarding the comparison of the coefficient of performance (COP):
Since optimizing the heating curve and settings at the end of last year, the system has had a COP of about 5.5. Operating hours are around 1200; the deep borehole was drilled approximately 20% deeper than initially recommended by the companies, at our own request.
here I would like to share some experiences and data regarding my brine heat pump and deep drilling, based in part on the expert’s "questionnaire":
a) What is the soil composition on your property?
Up to 3m (10 feet) silty, fine sandy, clayey soil
Up to 4m (13 feet) slope debris, rock fragments
Then bedrock (mainly limestone)
b) How deep was the drilling?
Drilled twice to a depth of 72m (236 feet)
c) How much did the drilling cost?
€10,400 including double U-probes DN25
Grouting material with 2.0 W/mK thermal conductivity
Permitting process (building permit / planning permission)
Pressure-tight house entry at the basement and underground routing of supply lines (about 25m (82 feet))
Filling/draining equipment, filling, pressure testing, etc. (all inclusive)
d) How much did the system cost?
System: Tecalor TTc 05 with heating output at B0/W35 of 5.8 kW and coefficient of performance (COP) of 4.8
Cost: €9,800
e) Were there any difficulties during installation, if so, what kind?
Because the water used to flush out the drilled material during drilling seeped away, a "small compressor" was needed to blow it out with air. However, it had to be placed on a neighbor’s property who had not yet started building. The machine was the size and approximate weight of a 20-ton truck but was off-road capable. This caused a 2-day delay because the compressor first had to be transported to our site. No additional costs were charged.
f) How is the daily operation?
"Like a refrigerator." Once the parameters on the heating system are correctly set, the only thing that should be done is occasionally reading the information/data such as operating hours and source temperature. Otherwise, it runs "on its own," just like any heating system. When the door is closed, the unit is virtually inaudible. Very discreet since, apart from the cabinet in the utility room, nothing else is visible (all brine pipes are underground).
e) What are the operating costs for which living area?
Currently, a living area of 180sqm (1937 sqft) is heated, plus an additional 65sqm (700 sqft) of cellar space within the insulated thermal envelope (these rooms are around 15-16°C (59-61°F) on the coldest days). From September 2014 to September 2015, 2,000 kWh of electricity was consumed for heating and hot water (2 adults, 1 baby, 1 toddler). The house is a KfW-70 standard building according to the 2009 energy saving regulations, which already met the required technical standards before the central ventilation system with enthalpy heat exchanger was installed (we decided to add this after the initial applications).
f) to be continued ....
Note regarding the comparison of the coefficient of performance (COP):
Since optimizing the heating curve and settings at the end of last year, the system has had a COP of about 5.5. Operating hours are around 1200; the deep borehole was drilled approximately 20% deeper than initially recommended by the companies, at our own request.
Why be provocative? A heating system that is never used is unnecessary, regardless of whether the building is well or poorly insulated, or heated with underfloor heating or radiators. In our current rental apartment from just after the turn of the millennium, the radiators in the bedroom and kitchen have never been turned on; they only take up space. These rooms could easily be left without heating (if that were allowed, which I don’t know).
Maybe someone here with expertise can answer this. For example, we currently don’t have underfloor heating installed in the utility room (upper floor). However, I’m not sure if that’s due to the function of the room or its very small size. We only rented the property and were not involved in its construction.
Besides the potential cost savings from not installing unnecessary underfloor heating, a heat pump could of course be better adjusted to actual usage. If there is a radiator or heater in every room, that is factored into the heat demand calculation and flow rate, even if in practice 30% of them are always turned off. Someone could always come along and turn all the controls up, right? Just a theory.
Besides the potential cost savings from not installing unnecessary underfloor heating, a heat pump could of course be better adjusted to actual usage. If there is a radiator or heater in every room, that is factored into the heat demand calculation and flow rate, even if in practice 30% of them are always turned off. Someone could always come along and turn all the controls up, right? Just a theory.
M
Mastermind119 May 2018 15:30Fuchur schrieb:
Maybe there is a professional around here who can answer this. For example, we currently don’t have underfloor heating installed in the utility room (first floor). However, I’m not sure if that’s due to the function of the room or simply because the room is quite small. We only rented the place and were not involved in the construction.
Besides the potential cost savings from not installing unnecessary underfloor heating, you could also better adapt a heat pump to actual usage. If there is a heater in every room, that of course factors into the heat demand calculation / flow rate, even if in practice 30% of the time they are set to “off.” Someone could always come along and turn all the valves up, right? Just theory. Wrong. An unheated room indirectly cools down the adjacent rooms. For example, if there is a bathroom next door, it is doubly inconvenient. That means you have to heat the neighboring room even more to reach the desired room temperature. However, if the room is next to other rooms that are generally kept cool (such as pure bedrooms), then it is fine...
But what exactly is the question aiming at in the case of a rental property?
If the heating costs are low, then everything should be fine...
Of course, I understand that heat will more or less distribute. But even in the shown example of bedroom-bathroom, I wouldn’t heat the bedroom just to keep the bathroom warm if I actually want to keep the bedroom cool (and the bathroom will probably need an additional heater anyway for proper warmth).
The rent was not a question, just a statement that I don’t know the reason for the missing underfloor heating.
The rent was not a question, just a statement that I don’t know the reason for the missing underfloor heating.
No, you regulate the temperature in the bedroom to avoid “stealing” heat from the bathroom. That is exactly why the underfloor heating must be properly designed according to the heat demand of each room. Only in this way can the supply temperature be kept as low as possible, allowing the heat pump to operate as efficiently as possible.
M
Markus130417 Oct 2018 22:05Hello everyone,
a brief overview of our situation: We have installed an Alpha Innotec brine heat pump with deep geothermal drilling. The house is a KFW 55 energy-efficient building, 160 m² (1,722 sq ft) over 1.5 floors. The rooms are equipped with individual room thermostats.
Unfortunately, the system was only explained to us briefly, and after we encountered the first malfunction, the installer recommended and set a nighttime setback. Under the conditions mentioned above, is this actually advisable? Opinions on this seem to differ. Also, the domestic hot water is no longer continuously heated.
I am grateful for any tips.
a brief overview of our situation: We have installed an Alpha Innotec brine heat pump with deep geothermal drilling. The house is a KFW 55 energy-efficient building, 160 m² (1,722 sq ft) over 1.5 floors. The rooms are equipped with individual room thermostats.
Unfortunately, the system was only explained to us briefly, and after we encountered the first malfunction, the installer recommended and set a nighttime setback. Under the conditions mentioned above, is this actually advisable? Opinions on this seem to differ. Also, the domestic hot water is no longer continuously heated.
I am grateful for any tips.
Similar topics