The Goswami cycle is a cycle that combines an ammonia–water vapor absorption cycle and a Rankine cycle for cooling and mechanical power purposes by using thermal heat sources such as solar energy or geothermal steam. In this paper, a theoretical investigation was conducted to determine the performance outputs of the cycle, namely, net mechanical power, cooling, effective first law efficiency and exergy efficiency, for a boiler and an absorber temperature of 85 °C and 35 °C, respectively, and different boiler pressures and ammonia-water concentrations. In addition, an experimental investigation was carried out to verify the predicted trends of theoretical analysis and evaluate the performance of a modified scroll expander. The theoretical analysis showed that maximum effective first law and exergy efficiencies were 7.2% and 45%, respectively. The experimental tests showed that the scroll expander reached a 30–40% of efficiency when boiler temperature was 85 °C and rectifier temperature was 55 °C. Finally, it was obtained that superheated inlet conditions improved the efficiency of the modified expander.
Experimental and Theoretical Analysis of the Goswami Cycle Operating at Low Temperature Heat Sources
Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received May 21, 2017; final manuscript received December 4, 2017; published online March 15, 2018. Assoc. Editor: Luis Serra.
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Demirkaya, G., Padilla, R. V., Fontalvo, A., Bula, A., and Goswami, D. Y. (March 15, 2018). "Experimental and Theoretical Analysis of the Goswami Cycle Operating at Low Temperature Heat Sources." ASME. J. Energy Resour. Technol. July 2018; 140(7): 072005. https://doi.org/10.1115/1.4039376
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