hi everyone,
i have one question i am stuck with this problem.
1- i want heating a room having one window, by using type 56
inside temp = 10, 20, 30,....
dry bulk temp= ambient temp = outside = 0
sky temp = 0 and -20
i wanna see the change in overall heat transfer coefficient = u-value of glazing (window) by changing inside temperature using this equation
U = Q / A(T) where
U = U-value
q= convective and radiative heat loss
A = Area of window
T = ambient and inside temp difference.
i get results but TRNSYS giving me almost the same value of U for all temp difference. trend is not same as experimental U-value trend according to change in inside temp.
anyone please help me with this is it possible to calculate U-value of window like this. or trnsys use fix U-value for the calculation of heat load.
thanks in advance. for killing your time.
Regards
Adnan