PROPERTIES OF SEAWATER WITH ICE SLURRY USE IN FOCUS

摘要

Seawater is the most common fluid on earth and ice generating machines are increasingly used on fishingrnvessels to produce ice slurry from seawater with up to 60% ice to be poured over the catch. An experimentrnusing this method has recently shown that sensitive fish immersed in ice slurry, when flown from Japan tornTaiwan, arrived in better condition than fish chilled by ordinary procedure. In this study, a literature searchrnhas been made to establish physical property data of seawater as function of salinity and temperature. Icernslurry properties of seawater have been generated and are presented by means of an enthalpy-phase diagramrnand related tables with ice concentration, enthalpy change and density. This material confirms that an initialrnsalt content of 2–3 % is optimal and it can help determine the potential for long preservation of catch onrnboard and during transport. As seawater is known to be corrosive, a brief discussion on corrosion factors andrnproblems, the use of corrosion inhibitors and choice of machine and transport materials is included in thisrnpaper.