Develop an expression for enthalpy of moist air per unit mass of dry air as under:
h = 1.005 t + w(2500 + 1.88 t) kJ/kg where is DBT and w is humidity ratio.
Discuss the importance of liquid-vapour heat exchanger (LVHE) in the vapour compression refrigeration system. Clearly mention advantages and disadvantages of using such heat exchangers. Represent the cycle of T-s and P-h diagrams and illustrate the influence of LVHE.