Since confirmation of the contribution of the refrigerants to ozone depletion and global warning, many solutions have been carried out to reduce their direct and indirect impact on the environment. One of them consists in using secondary refrigerant fluid (SRF) to reduce the amount of refrigerant flowing in the refrigerant loop. The new two-phase SRF present some advantages, and this paper presents a process using supercooled water to produce such fluid. (c) 2006 Elsevier Ltd. All rights reserved.