Approach temperature

[Pons19]

Hi All,

What is mean by approach temperature in Air cooler?

Thanks in Advance.

Kind Regards
Pons

 

[srfish]

The temperature approach is the difference between the process outlet temperature and the inlet air temperature. So the approach temperature is probably the process outlet temperature.

 

[Armen75]

The appoach temperature is how close you can get the process side (hot outlet) to the air side (cold inlet). So, if it is ambient 25oC, unless you have a very large oversurface, you are not going to get 25oC in the process outlet, you are going to get it cooled to, let's say, 30 oC, which is a 5 degree approach.