Flat collectors or gas condensing boilers

without a large panoramic window because only in this way can you get enough power into the water (about 30 kW per firing cycle for us)....

What is supposed to be supplied here, a commercial operation? 30 kW is the theoretical power output at a single operating point; how much energy is actually usable during the combustion process can be proven with a heat meter. I would not want to know the JNG of this solution.

best regards

Hello Euro,
if I burn 10kg of hardwood, I have a heating value of approximately 40kWh (4kWh/kg).
With a water content in the tiled stove of 70%, 28kWh go into the water.
Okay, ideally considered without losses!
To heat the storage (900L) by e.g. 40K, I need about 43kW. (m*CP*deltaT)
Heat quantity meters for monitoring will be installed... I can report later.
The boiler of the tiled stove is suitable as the sole heating system for buildings with a heating load up to 9kW.
I know people who additionally have no gas condensing boiler and manage with the system without freezing in winter... however, then 30 - 40kg of wood pass through the stove per day.

Regards Fragi

....when I burn 10kg of hardwood, I have a heating value of approx. 40kWh (4kWh/kg)....

Correct, however this supply must also be accepted/capable of being accepted. ;-)

...With a water content in the tiled stove of 70%, 28kW/h go into the water...

Actual energy or pure power supply? Pure theory, practically completely irrelevant.

...Ok, ideally considered without losses!..

Then just wait for the heat meter, the sobering will surely come! ;-)

..To heat the storage tank (900L) by e.g. 40K I need about 43kW. (m*CP*deltaT)...

Surely and not just pure theory? Could volume flows, the size of the heat-transferring exchanger surface, their position inside a storage tank not also play a role ;-)

....Heat meter for monitoring will be installed... I can report later....

I am curious!

....The boiler of the tiled stove is suitable as the sole heating for buildings with a heating load up to 9kW.....

30 kW on the water side? How is the heat distribution of the tiled stove realized on the heating side?

best regards

Hello Euro, no no... I made a mistake... not 30kW... I meant 30kW/h per burn. The tiled stove has about 10kW on the water side. The nominal heat output is 15kW. We can adjust the volume flow (flow measurement) and adjustable pump. Of course, the correct design of such a system is essential... as with other heating systems as well...