Title

Investigation on capacity matching in liquid desiccant and heat pump hybrid air-conditioning systems

Document Type

Journal Article

Publication Details

Niu, X., Xiao, F. & Ma, Z. (2012). Investigation on capacity matching in liquid desiccant and heat pump hybrid air-conditioning systems. International Journal of Refrigeration, 35 (1), 160-170.

Abstract

Liquid desiccant and heat pump (LDHP) hybrid air-conditioning system provides a promisingindependent air dehumidification solution. Capacity matching among the four major heatand mass transfer components, i.e. dehumidifier, regenerator, evaporator and condenser, isessentially important for energy efficiency of the hybrid system. In this paper, the configurationof the hybrid system is firstly studied. Novel matching indices are proposed to evaluatethe matching effect. The results show that a LDHP hybrid system with double-condenser,one solution-cooled and one air-cooled, is a feasible configuration for achieving capacitymatching. To achieve dynamic capacity matching under real changing operating conditions,the effects of three critical operating variables, including solution flow rate, revolution of thecompressor and air flow rate in the air-cooled condenser, on capacity matching and energyperformance are studied. Simulation results show that dynamic capacity matching can onlybe achieved by regulating these three operating variables simultaneously.Liquid desiccant and heat pump (LDHP) hybrid air-conditioning system provides a promisingindependent air dehumidification solution. Capacity matching among the four major heatand mass transfer components, i.e. dehumidifier, regenerator, evaporator and condenser, isessentially important for energy efficiency of the hybrid system. In this paper, the configurationof the hybrid system is firstly studied. Novel matching indices are proposed to evaluatethe matching effect. The results show that a LDHP hybrid system with double-condenser,one solution-cooled and one air-cooled, is a feasible configuration for achieving capacitymatching. To achieve dynamic capacity matching under real changing operating conditions,the effects of three critical operating variables, including solution flow rate, revolution of thecompressor and air flow rate in the air-cooled condenser, on capacity matching and energyperformance are studied. Simulation results show that dynamic capacity matching can onlybe achieved by regulating these three operating variables simultaneously.

RIS ID

39107

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Link to publisher version (DOI)

http://dx.doi.org/10.1016/j.ijrefrig.2011.08.004