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.
S
Sebastian7930 Nov 2015 10:46Because I thought that you gradually increase and decrease the temperature in specific steps to verify the load-bearing capacity of the screed. And you’re not supposed to make such big jumps in a short time.
I was only familiar with accelerating the normal screed drying process until now.
But alright, if that’s how it is.
I was only familiar with accelerating the normal screed drying process until now.
But alright, if that’s how it is.
B
Bauexperte30 Nov 2015 11:13Sebastian79 schrieb:
I was only familiar with accelerating normal screed drying so far. There is still a lot you don’t know.
Sebastian79 schrieb:
But okay, if that’s the case. The product is called Viebronol® and it reaches readiness for covering within 5 days; even with parquet flooring. Essentially, it’s similar to a fast-drying screed with a carefully guarded composition.
Regards, Bauexperte
S
Sebastian7930 Nov 2015 11:35Fortunately, I don’t have to either - but it sounds more like marketing talk, since everything has its downside.
I prefer to let it dry the traditional way...
I prefer to let it dry the traditional way...
The topic is interesting but has somewhat gone off track.
I’m curious about your energy consumption AFTER the screed has dried.
So, for those who have been living in their homes for a while... what are your energy costs for how many square meters (sq m) of living space, and according to which KfW standard? Solid construction or timber frame?
We initially decided on a gas condensing boiler with solar panels, but we might still change... I’m just wondering if the additional €8,000 cost (after BAFA subsidy) will ever pay off. With that, I could have cooling in the summer, which should also be possible with a central ventilation system... So the question is: give up the ventilation system in favor of geothermal energy? I don’t think so.
But please share your electricity costs, I’m curious. I often hear about surprisingly high electricity bills.
I’m curious about your energy consumption AFTER the screed has dried.
So, for those who have been living in their homes for a while... what are your energy costs for how many square meters (sq m) of living space, and according to which KfW standard? Solid construction or timber frame?
We initially decided on a gas condensing boiler with solar panels, but we might still change... I’m just wondering if the additional €8,000 cost (after BAFA subsidy) will ever pay off. With that, I could have cooling in the summer, which should also be possible with a central ventilation system... So the question is: give up the ventilation system in favor of geothermal energy? I don’t think so.
But please share your electricity costs, I’m curious. I often hear about surprisingly high electricity bills.
N
nordanney13 Dec 2015 16:23xycrazy schrieb:
The topic is interesting but has kind of drifted off course.
I’m curious about your consumption AFTER screed drying.
So, those of you who have been living in your homes for a while... what consumption do you have for how many square meters of living space, and according to which KfW standard? Solid construction or timber frame?
We have basically decided on a gas condensing boiler with solar panels, but could still change... I just wonder if the additional 8,000€ (already deducting BAFA funding) will ever pay off. For that, I could cool in summer, which should actually also be possible with a central ventilation system... so the question arises: Give up the ventilation system in favor of geothermal energy? I don’t think so.
But please post your electricity costs, I’m curious. I often hear about outrageous electricity bills. 300 sqm (3,229 sq ft) heated area with a temperature of about 22°C (72°F), the house is approximately KfW 55 standard (solid construction, partly clinker brick, partly external thermal insulation composite system). Heating plus hot water costs for five people run about €55–60 per month (depending on electricity prices; photovoltaic electricity valued at our electricity supplier’s rate). Geothermal heat pump by Waterkotte plus controlled mechanical ventilation.
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