Page 365 - Handbook of Energy Engineering Calculations

FIGURE 20 Closed-cycle system gassifies refrigerant in boiler to
drive Rankine-cycle turbine for pumping water. (Product Engineering.
Battelle Memorial Institute, and Northwestern Mutual Life Insurance

Co.)

The rate of gas release in such a closed system is a function of (a) the unit
enthalpy of vaporization of the refrigerant chosen, (b) the temperature of the
water leaving the solar collector, and (c) the efficiency of the boiler used to
transfer heat from the water to the refrigerant. While there will be some heat

loss in the piping and equipment in the system, this loss is generally
considered negligible in a well-designed layout.