Hi all;
I have a datasheet for air cooled heat exchanger (ACHE). In this document i found that the vendor has calculated the product UA (Overall heat transfer coefficient multiply by heat transfer area), this product is calculated according to a fixed set of design conditions such as mass flow rates of air and process fluid, air inlet/outlet temperature, process fluid inlet/outlet temperature, pressure drop,etc...
If i apply the equation Q=U.A.∆Tlm having the in/out temperatures then i can calculate the duty.
can i use this product (UA) always to calculate the duty? regardless whatever temperatures i have
Is the duty mentioned in the datasheet considered as the max. duty