Study on the heat transfer with regard to an off-grid vending machine having a low impact on the environment

Abstract Following the current trend of energy economy, article’s team designed a vending machine made sandwich panels, in order to minimize heat transfer from environment chilled volume. The inputs calculation was based on data provided panels’ technical sheets. In this paper, real performance operation monitored, resulting deviation between 2.27 and 5.37% theoretical values for global coefficient. Furthermore, TEWI coefficient ( T otal E quivalent W arming I mpact) evaluated highlight efficiency equipment, operating with refrigerant R290. Thereby, authors emphasize importance transition natural refrigerants.