论文信息 - Analysis of an integrated vapour compression and a waste heat dehumidifier A/C system

Analysis of an integrated vapour compression and a waste heat dehumidifier A/C system

Abstract A compact, self-contained energy efficient air-conditioning system is presented. It has a vapour compression (VC) unit combined with a rotary solid desiccant dehumidifier. The drying matrix is regenerated entirely using the waste heat of the VC unit by a heat pump in a heat recovery system. The governing equations are given and are numerically solved for a typical case study. Computations show that employing parallel flow rather than counterflow configurations through the matrix can reduce the regeneration heat required by about 40%. Equations are solved for a practical range of cycle duration from 180 to 900 s. Results show the variations of temperature and water content for the matrix as well as the flowing air streams. The overall cooling COP achieved by the combined system reached 1.73 for design conditions in Jeddah, Saudi Arabia, which is 25% more than that of the VC alone. Whenever the ARI conditions are applied, the combined system showed an overall COP of 1.76 with 27% energy savings compared to the VC alone.

S. E. Aly | H. A. Gari | K. A. Fathalah

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