Question

Calculation of the available power, the outlet temperatures and the thermal efficiency for a facadeintegrated

air collector at 800 W/mÇ irradiance and an ambient temperature of 10°C. The ambient

temperature equals the inlet temperature Tf,in in the collector. The air duct geometry corresponds to

the examples already calculated with a collector length of 2.5 m, and the heat transfer coefficient of

the rear Ub is a constant 0.65 W/mÇK (side losses ignored).

v =2.5m/s (vwind=1m/s), ea=0.9

Answer 1