Abstract
Alternative methods of providing cooling using lower-grade energy have been investigated. This paper considers a cycle which combines indirect evaporative cooling with a dehumidifier to meet latent loads and a vapour compression refrigeration unit to meet sensible load. The cycle has been studied for two climate types and two different loads representative of those likely to be met in commercial buildings. Also considered is the combination of this cycle with a solar energy system which regenerated the desiccant dehumidifier. The advantage of a desiccant system is the use of low-grade heat at temperatures between 60/sup 0/ and 100/sup 0/ which can be provided by a conventional solar energy system or from waste heat. Another significant advantage of these cycles is their ability to operate in an indirect evaporative cooling mode at times of low latent load and low relative humidity.
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