Hello,
our builder offers a solar thermal system from the company Junkers (A2/300/FKC-V2/ISM1) with 2 rooftop collectors totaling 4.74m² (51 ft²), Comfortline series, including an approximately 300-liter (79 gallons) hot water storage tank. Is this worthwhile for a single-family home of about 140m² (1,507 ft²)? Does anyone have experience with this system?
Thanks for your suggestions
our builder offers a solar thermal system from the company Junkers (A2/300/FKC-V2/ISM1) with 2 rooftop collectors totaling 4.74m² (51 ft²), Comfortline series, including an approximately 300-liter (79 gallons) hot water storage tank. Is this worthwhile for a single-family home of about 140m² (1,507 ft²)? Does anyone have experience with this system?
Thanks for your suggestions
TomTom1 schrieb:
...I’ve never really thought about that – but it sounds like nonsense. Well, I would think about it again. TomTom1 schrieb:
...heat meter... => Heat meter, not a thermometer. This device can measure the actual amount of energy “harvested.” However, it is often overlooked, which would then reveal the true “modesty” of the average solar thermal system. Best regards.
M
Micha&Dany13 Oct 2011 08:30Hi there
Temperature is thermal energy.
And when the water cools down – so it releases thermal energy – then something else is absorbing this thermal energy, so it gets warmer.
But whether this really leaves a measurable effect in the room, I doubt – and you definitely won’t notice anything in the heating costs.
Regards
Micha
€uro schrieb:
"Temperature" is something completely different from energy!!!
Temperature is thermal energy.
And when the water cools down – so it releases thermal energy – then something else is absorbing this thermal energy, so it gets warmer.
But whether this really leaves a measurable effect in the room, I doubt – and you definitely won’t notice anything in the heating costs.
Regards
Micha
Micha&Dany schrieb:
....Temperature is thermal energy .. That’s quite alarming. No wonder so many homebuilders get misled. Best regards
€uro schrieb:
This is shocking. No wonder so many builders are being misled.
Regards.Hello!
A very specific and helpful statement. Otherwise, I completely agree with Micha&Dany.
Surely, €uro has a detailed and factual explanation for such a qualified claim.
Best regards,
TomTom1.
Micha&Dany schrieb:
Hi there
But I seriously doubt that this has a measurable impact on the room – and you definitely won’t notice anything on your heating bills
Regards
Micha Hello!
Well, if a panel radiator with much less water volume and significantly lower supply temperature can have an effect, then surely a 300-liter (79-gallon) storage tank at 60 degrees Celsius (140 degrees Fahrenheit) can as well.
Otherwise, it’s just as ineffective for heating as my condensing dryer – it’s just a “side effect.”
Best regards,
TomTom1
M
Micha&Dany14 Oct 2011 09:51Hello Tom
Well, if you think about how much heat energy is released...
300 liters (79 gallons) at 60°C (140°F) – if it cools down to 40°C (104°F), you could calculate the amount of heat energy released.
But who absorbs this energy?
The pipes, the insulation of the storage tank, depending on how it’s installed also the wall, the room air, and so on...
It’s not that much heat energy after all, and it’s distributed across many things – and air probably has the lowest heat capacity among all those.
But physics has been a while for me too, so these are just rough estimates – anyone interested in exact numbers can do the calculations.
Best regards,
Micha
Well, if you think about how much heat energy is released...
300 liters (79 gallons) at 60°C (140°F) – if it cools down to 40°C (104°F), you could calculate the amount of heat energy released.
But who absorbs this energy?
The pipes, the insulation of the storage tank, depending on how it’s installed also the wall, the room air, and so on...
It’s not that much heat energy after all, and it’s distributed across many things – and air probably has the lowest heat capacity among all those.
But physics has been a while for me too, so these are just rough estimates – anyone interested in exact numbers can do the calculations.
Best regards,
Micha