Effects of Operating Conditions on Performance of Adsorptive Desiccant Cooling System

• Published in: KAGAKU KOGAKU RONBUNSHU Vol. 24; no. 6; pp. 894 - 900
• Main Authors: JIN, WEILI, KODAMA, AKIO, GOTO, MOTONOBU, HIROSE, TSUTOMU
• Format: Journal Article
• Language: Japanese
• Published: Tokyo The Society of Chemical Engineers, Japan 10.11.1998; Kagaku Kōgaku Kyōkai
• Subjects: adsorption; adsorption heat pump; adsorptive desiccant cooling; air-conditioning; honeycomb rotor dehumidifier
• ISSN: 0386-216X; 1349-9203
• DOI: 10.1252/kakoronbunshu.24.894

For the purpose of practical application of the adsorptive desiccant cooling system using a honeycomb rotor dehumidifier, a 20 kw field-test apparatus has been carried out. Effects of operating conditions and ambient air conditions on performance of the adsorptive desiccant cooling system are investigated, and the following results are obtained ; 1) The optimum air temperature T8 for regeneration of the adsorbent rotor is found to maximize the thermal coefficient of performance. When the temperature and absolute humidity of ambient air are T1=28.432.3°C, X1=8.811.7 g/kg, the optimum air temperature for regeneration is around T8=6585°C. 2) The cooling capacity is found to decrease with increasing absolute humidity of ambient air. 3) At regeneration air temperature above 100°C, the thermal coefficient of performance is improved significantly when the flow rate ratio of regeneration air to supply air through the dehumidifier is selected as one-half. 4) The cooling performance is estimated to be improved by using a water spray heat exchanger instead of the conventional evaporative cooler.