부산대학교 도서관

The design for refrigerant flow control (orifice or trap) between the first generator and condenser has a significant influence on performance, particularly if the source hot water temperature decreases significantly from its design or nominal value. The trap flow design tends to maintain high performance over a wider range of hot source temperatures. In addition, the characteristic of the solution circulation pump has a marked effect on performance for temperatures above the nominal or design source hot water temperature. A steep pump characteristic (approaching positive displacement) is preferred. The relative allocation of heat exchange area to the seven heat exchange components is critical to optimizing cycle performance and cost. While increasing the area of any component has a beneficial effect on both capacity and COP, the relative influence on capacity and COP may be markedly different for different components. Since a large portion of the cost of absorption cooling systems in in heat exchange areas, the relative allocation of area is a salient consideration. The dynamic computer code developed for this investigation should provide a useful tool for manufacturers to improve future double-effect absorption cooling machines.