BFoelsch said:
The flow-temp rise constant is 2.3 in Liters/sec and degrees C.
NOW you can design the heat exchanger for me!
Heck a central heating heat exchanger may be a bit on the large side,
but certainly not enormous. This whole thing is 67 cm tall and 40 cm wide:
http://www.remeha.info/business/index.php?area=product&prodid=91&id=90
http://libraryuk.remeha.info/Avanta Plus Brochure.pdf
Delivers 28 kilowatt to hot tap water, and 23.5 kilowatt in heating
water heated from 30 to 50 degrees. Flue gases are cooled below boiling
to condense water vapour and get the heat from that.
That thing contains two heat exchangers (gas to heating water, and
heating water to tap water), the circulation pump, gas valve, fan for
combution air, and controller.
Reducting to chip size is left as an excercise...
Thomas