학술논문
Exergy analysis of solar rankine power cycles used for cooling
Document Type
Conference
Author
Source
Proc. Annu. Meet. - Am. Sect. Int. Sol. Energy Soc.; (United States); 6; Conference: American Solar Energy Society meeting, Minneapolis, MN, USA, 1 Jun 1983
Subject
Language
English
Abstract
Second law (exergy) analysis was performed on two types of solar cooling systems which are based on a vapor compression cycle driven by a Rankine cycle: those energized by the sun at one temperature and using organic fluids in the power cycle, and a hybrid cycle which is energized by a solar source at low temperatures and by a fossil source at higher temperatures and which uses steam as the fluid. A better thermodynamic match is obtained between the energy sources and sinks in the hybrid cycle, which results in a doubling of the cycle's efficiency as compared to the single-temperature organic fluid cycle. Nevertheless, there still exists a large difference between the temperatures of combustion (1500/sup 0/C) and superheated steam ( about 600/sup 0/C), and thus the superheater's effectiveness is relatively low. This points to several methods of improvement.