AMMONIA/CO sb 2 /sb REFRIGERATION SYSTEM, CO sb 2 /sb BRINE PRODUCTION SYSTEM FOR USE THEREIN, AND AMMONIA COOING UNIT INCORPORATING THAT PRODUCTION SYSTEM

摘要

The object of the invention is to provide an ammonia/CO 2 refrigeration system in which the ammonia cycle and CO 2 brine cycle can be combined without problems even when refrigeration load such as refrigerating showcase, etc. is located at any place in accordance with circumstances of customer's convenience. The system comprises apparatuses working on an ammonia refrigerating cycle, a brine cooler for cooling and condensing CO 2 by utilizing the latent heat of vaporization of the ammonia, and a liquid pump provided in a supply line for supplying the cooled and liquefied CO 2 to a refrigeration load side cooler, wherein said liquid pump is a variable-discharge pump for allowing CO 2 to be circulated forcibly, and the forced circulation flow is determined so that CO 2 is recovered from the outlet of the cooler of the refrigeration load side in a liquid or liquid/gas mixed state.