Selection of optimal parameters of the heating and cooling system of a residential building

An example of the calculation of combined system of heat and refrigeration supply for an apartment house under the conditions of hot climate (Cairo, Egypt) is given. The components of the reversible vapor-compression machine suggested for this purpose were selected according to the results of the calculation of energy and economic efficiency of the machine. Energy optimization was carried out by means of comparison of the exergy efficiencies of different thermodynamic cycles on several refrigerants. With the economic optimization, dimensionless costs were compared for the case of different completeness of the machine. The results of the optimization calculations are given.