EFFECTS OF OPERATING-CONDITIONS ON PERFORMANCE OF ADSORPTIVE DESICCANT COOLING SYSTEM

For the purpose of practical application of the adsorptive desiccant c ooling system using a honeycomb rotor dehumidifier, a 20 kw field-test apparatus has been carried out. Effects of operating conditions and a mbient air conditions on performance of the adsorptive desiccant cooli ng system are investigated, and the following results are obtained; 1) The optimum air temperature Tg for regeneration of the adsorbent roto r is found to maximize the thermal coefficient of performance. When th e temperature and absolute humidity of ambient air are T-1 = 28.4 simi lar to 32.3 degrees C, X-1 = 8.8 similar to 11.7 g/kg, the optimum air temperature for regeneration is around T-8 = 65 similar to 85 degrees C. 2) The cooling capacity is found to decrease with increasing absol ute humidity of ambient air. 3) At regeneration air temperature above 100 degrees C, the thermal coefficient of performance is improved sign ificantly when the flow rate ratio of regeneration air to supply air t hrough the dehumidifier is selected as one-half. 4) The cooling perfor mance is estimated to be improved by using a water spray heat exchange r instead of the conventional evaporative cooler.