Proceedings of the 1986 International Congress on Renewable Energy Sources. Second law analysis of absorption refrigeration system of the solar-powered desalination pilot plant at Yanbu. International Congress on Renewable Energy Sources [18-23 Mayo 1986, Madrid].

Hamad, Ghassan F. Gupta, Makam C.
Consejo Superior de Investigaciones Científicas.

1987

CIENA
1113
v. 2

84-00-6674-X

The greatest challenge in solar applications is to find the most cost-effective solar process for a given application, and in order to find such a process, a thermodynamic analysis of the system becomes imperative. The first law of thermodynamics completely ignores the quality of energy and it is only the second law that brings out the effectiveness of energy utilization in a process by definign the availability of energy. The paper presents the merits of the application of the second law efficiency and relates it to the analysis of a solar absorption system, which is used to produce additional refrigeration for precooling ammonia in the solar desalination pilot plant at Yanbu, Kingdom of Saudi Arabia. The plant is an indirect freezing unit, designed to provide 200 cubic meters of product water in a day. The absorption system uses the lithium bromide absorption cycle, and recovers the energy remaining in the steam engine exhaust. Refrigerant is water which absorbs heat from the condensing ammonia. The paper analyses and evaluates the processes in the absorption cycle and computes the second law efficiency of the system. ABSTRACT. INTRODUCTION. THERMODYNAMIC ANALYSIS. Limitations of the first law. Energy. Second law efficiency. SYSTEM DESCRIPTION. Design parameters of the absorption system. ENERGY BALANCE AND COP. SECOND LAW EFFICIENCY. Availability balance. SUMMARY AND CONCLUSIONS. ACKNOWLEDGEMENT. REFERENCES.

Presenta tbls. y gráfs.

ARABIA SAUDITA; ENERGIA SOLAR; DESALINIZACION; AGUA; TERMODINAMICA;