Analysis and hazard evaluation of geat-treansfer fluids for the direct contact cooling system

Abstract

This paper discusses several low-temperature heat-tranfer fluids, including water-based inorganic salt,organic salt, alcohol/glycol mixtures, silicones, and halogenated hydrocarbons in order to choose the best heat-products such as propylene glycol and potassium formate as newly used in super market and food procesingrefrigeration. The stability of comercial fluids at the working temperature of -20oC was monitored as a functionof time up to two months. And organic and inorganic compositions of candidate fluids were obtained by analyticalpropylene glycol is very efficient and safe heat transfer fluids for the direct cooling system with liquid phase.