How to represent the cooling tower working on psychrometric chart.?

Question

How to represent the cooling tower working on psychrometric chart. consider initial conditions as WBT 28 deg.C, RH-50%, cooling range of cooling tower 10 deg.C., water exit temp from CT 33 deg.C. How the winter and summer affects cooling tower performance.

Answer 1

Look up air psychometric chart at constant pressure. Set the air temperature and relative humidity, two known quantities, as point 1. Set the  air outlet temp. and relative humidity around saturation as point 2. The difference in enthalpy values between the two points gives the heat loss in the air. If the flow rate is known one can obtain the total heat lost from air.