ᐅ Heating system: Flue gas heat exchanger for solar/gas condensing boiler
Created on: 4 Feb 2014 20:51
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Oxmox1980O
Oxmox19804 Feb 2014 20:51Good day,
my name is Adrian and I am new to this forum. The topic of heating is completely new to me. I am building a house with 130 sqm (1400 sq ft).
I want to use solar collectors for domestic hot water in the summer and a hydronic fireplace in the winter for hot water and heating support.
The condensing boiler will be the main heating source.
The whole system should be controlled by a UVR1611 from Technische Alternative, as I own one.
In addition, I already have three solar collectors from VivaSolar and a hot water tank from Hellmann with two heat exchangers and 400 liters (105 gallons) capacity. The fireplace should have a heat exchanger of 10 kW.
I have read quite a bit about such systems online and put my thoughts into a drawing. I have some questions about my ideas and whether they will work, since I am not a hydraulics specialist.
In short, my idea is that in summer the hot water will come from the solar collectors. Of course, the collectors should also support the heating if the domestic hot water tank is full. In winter, the fireplace should be fired regularly to keep gas consumption within limits.
- Here is my first question: Since I live in Poland, I don’t have to follow any guidelines from German chimney sweeps. What is better: a flue gas heat exchanger or a coil that extracts heat directly from the embers, because that seems roughly how it works?
- And what is more sensible if I am not at home for an extended period, say two weeks: keeping the buffer tank for the heating at about 50°C (122°F) with the gas burner, or better to have an extra circuit as shown in the drawing? Also, how big should the buffer tank be?
- Is it possible to use the return flow from radiators to the underfloor heating and, if the water from the radiators is not warm enough, then take hot water directly from the buffer tank?
First of all, thank you very much. I don’t have any more questions for now.
my name is Adrian and I am new to this forum. The topic of heating is completely new to me. I am building a house with 130 sqm (1400 sq ft).
I want to use solar collectors for domestic hot water in the summer and a hydronic fireplace in the winter for hot water and heating support.
The condensing boiler will be the main heating source.
The whole system should be controlled by a UVR1611 from Technische Alternative, as I own one.
In addition, I already have three solar collectors from VivaSolar and a hot water tank from Hellmann with two heat exchangers and 400 liters (105 gallons) capacity. The fireplace should have a heat exchanger of 10 kW.
I have read quite a bit about such systems online and put my thoughts into a drawing. I have some questions about my ideas and whether they will work, since I am not a hydraulics specialist.
In short, my idea is that in summer the hot water will come from the solar collectors. Of course, the collectors should also support the heating if the domestic hot water tank is full. In winter, the fireplace should be fired regularly to keep gas consumption within limits.
- Here is my first question: Since I live in Poland, I don’t have to follow any guidelines from German chimney sweeps. What is better: a flue gas heat exchanger or a coil that extracts heat directly from the embers, because that seems roughly how it works?
- And what is more sensible if I am not at home for an extended period, say two weeks: keeping the buffer tank for the heating at about 50°C (122°F) with the gas burner, or better to have an extra circuit as shown in the drawing? Also, how big should the buffer tank be?
- Is it possible to use the return flow from radiators to the underfloor heating and, if the water from the radiators is not warm enough, then take hot water directly from the buffer tank?
First of all, thank you very much. I don’t have any more questions for now.
O
Oxmox19808 Feb 2014 17:53It seems that no one here has any knowledge about these matters, or am I in the wrong place?
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