Patent ID: 7406837
Filing Date: 2008-08-05
Classification: F25B

Abstract:
1. An ammonia/CO 2 refrigeration system comprising 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 heat exchanger (cooler), wherein are provided; a receiver for receiving CO a liquid pump composed to be a variable-discharge type forced circulating pump, which corresponds to said liquid pump for supplying the cooled and liquefied CO a riser pipe located between said liquid pump and a heat exchanger of refrigeration load side, a communication pipe for connecting the top part of the riser pipe to the CO wherein discharge pressure (of forced circulation) is determined so that CO wherein the top part of the riser pipe runs along a height position equal to or higher than the maximum liquid level of CO