Exergy Analysis of a Combined Power and Cooling Cycle

• Authors: R. Karaalı
• Languages of publication: EN

Abstracts

EN

Ammonia-water power cycles are important for efficient utilization of low temperature heat sources such as geothermal, solar, waste heat sources, etc. For some special conditions ammonia-water power cycle is an important and economical option. This paper presents an exergetic analysis of a combined power and cooling cycle that uses ammonia-water mixture as working fluid. Such cycles, use solar or geothermal energy or waste heat energy from a conventional power cycle. Ammonia-water power cycle can be used as independent cycles to provide power output and cooling. For a range (25-55 Bar) of boiler pressure the performance of the combined power and cooling cycle is investigated. The exergy of the boiler is very low compared to its energy. There is a boiling process and a heat transfer process at low temperature, both of which destruct the energy given to the boiler, so that the energy efficiency is low; however the exergy efficiency is higher than the energy efficiency. Increasing the turbine inlet pressure decreases the energy and exergy efficiencies.

Keywords

EN

88.05.Sv; 88.10.cn; 88.20.tf

Discipline

• 88.20.tf: Combined heat and power
• 88.10.cn: Heating and cooling of buildings; space heating(for solar heating and cooling of residential and commercial buildings, see 88.40.me)
• 88.05.Sv: Energy use in heating and cooling of residential and commercial buildings(for solar heating and cooling of residential and commercial buildings, see 88.40.me; for geothermal energy use in heating and cooling of buildings, see 88.10.cn)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2016
• Volume: 130
• Issue: 1
• Pages: 209-213

Dates

published

2016-07

Contributors

author

R. Karaalı

• Department of Mechanical Engineering, Bayburt University, 69000 Bayburt

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Identifiers

DOI

10.12693/APhysPolA.130.209