Novel adsorption refrigerators with separate type two phase closed thermosyphon designs

Abstract

Two adsorption refrigerators with separate type two-phase closed thermosyphon heating processes are designed to improve the heat transfer performance and to reduce the system's moving parts number and system's size. One adsorption refrigerator uses the design of three-effect separate type two-phase closed thermosyphon heating/cooling; the other one uses the design of separated separate type two-phase closed thermosyphon heating and force convection cooling. The results show that the coefficient of performance (COP) and specific of cooling power (SCP) can be improved because of the pressure difference mass recovery process. The system with the separate type two-phase closed thermosyphon heating and force convection cooling design is more attractive because fewer moving parts are used and the system's size can be reduced for building. Moreover, the thermal transfer of the adsorption beds is designed as separate type heat pipe, which can avoid the problem of corrosion from heat or sink sources, such as heavy-duty exhaust gases or seawater. Under the nominal working condition, the evaporating temperature, COP and SCP can reach −21 °C, 0.26 and 474 W kg−1. Copyright © 2015 John Wiley & Sons, Ltd.