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An independent dehumidification air-conditioning system has been built in Beijing, China. The dehumidificaiton is done by a hot water-driven liquid desiccant dehumidification subsystem. This paper reports results of field measurement of the system, which shows that the system can produce a comfortable indoor environment even in very humid weather. On dry days, the dehumidification system bears around 40% of the total load, while on humid days, it bears around 50%. Economic comparison of the independent dehumidification system and a conventional system indicates that the two systems have equivalent distribution power consumption, but the former one may save about 30% cooling source cost when the price ratio of electricity to heat is reasonably set. [ABSTRACT FROM AUTHOR]

This paper presents the field study results of a novel hot water-powered liquid desiccant dehumidification system, which has been installed in a demonstration building in Beijing, China, as part of an independent dehumidification air-conditioning system. The hot water is supplied by the urban heating network, which is powered by a heat and power cogeneration (CHP) plant. The working principles of the system, both in summer and in winter, are illustrated in detail. The performance of the system has been measured, showing that the average energy efficiency of the outdoor air processor is 1.83, the average regeneration efficiency 0.82, and the average energy efficiency of the entire liquid desiccant dehumidification system 1.50, which is competitive compared to a conventional electrical refrigeration system. The outdoor processors work in winter as total heat recovery units with efficiency being around 0.5. [ABSTRACT FROM AUTHOR]