Experimental studies on an air-cooled two-stage NH3-H2O solar absorption air-conditioning prototype

S. Du, R.Z. Wang, P. Lin, Z.Z. Xu, Q.W. Pan and S.C. Xu

Energy, 2012, vol. 45, issue 1, 581-587

Abstract: An air-cooled two-stage NH3-H2O absorption refrigeration system is proposed for potential application of residential small scale cooling system driven by solar heated hot water. It can reduce the initial fabrication and maintenance costs of both the solar collection system and the absorption chiller. An experimental prototype for 2 kW cooling capacity has been built to investigate the feasibility and performance of the proposed system. The experimental results indicate that the prototype operates smoothly and steadily. When the prototype is driven by 85 °C hot water with an evaporating temperature of 8 °C and ambient air temperature of 29 °C, its thermal COP and electric efficacy (ε) reach 0.21 and 5.1, respectively. COP stabilizes within the range of 0.18–0.25, and ε varies between 3.6 and 5.1 under air-conditioning conditions in summer, which are the right applications of air-cooled two-stage absorption systems. The study reveals the technical feasibility of the air-cooled two-stage NH3-H2O absorption system. It provides a way to develop low-cost small bulk solar absorption air-conditioning systems for residential applications.

Keywords: Solar air conditioning; Ammonia-water; Two-stage absorption cycle; Air-cooled; Prototype (search for similar items in EconPapers)
Date: 2012
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (17)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:45:y:2012:i:1:p:581-587

DOI: 10.1016/j.energy.2012.07.041

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