Second law evaluation of a lightweight cooling unit

摘要

The analysis based on the second law of thermodynamics of a lightweight vapor com- Received 12 November 2015 pression refrigeration system is presented. A small-scale linear compressor was applied in Received in revised form a DC-powered portable cooler for vehicles and for the medical field, using finned-tube 17 January 2016 Accepted 25 January 2016 Available online 27 January 2016 heat exchangers and R600-a (Isobutane) as the working fluid. The cooler was tested in an environmental chamber (with controlled temperature and humidity) under three differ- ent ambient temperatures (21, 25 and 32 °C) in order to measure key parameters of the.