Since the advent of the mandated Process Safety Management program (PSM) the industrial refrigeration sector has been faced with attempts to maintain lower refrigerant charges (re: inventories of refrigerant used in the system). To date, most of the efforts expended focus on keeping the ammonia refrigerant charge under 10,000 pounds. To a degree, this has largely centered around minimizing the quantity or use of gravity-flooded air-cooling evaporators or flooded shell and tube heat chillers. While these methods will drastically reduce the total refrigerant charge, other methods can be applicable. These typically involve re-thinking the basic premise for the use of a refrigerant and the application of specific sub-systems that are used in ammonia refrigeration systems.
About the author
Mike Fisher has over 35 years of experience with refrigeration systems. This background includes; service, installation, equipment manufacturing, research and development, project management, consulting engineering, system design and packaged systems.
You are currently browsing the Cold Systems blog archives for November, 2009.
Archive for November, 2009
I often see people interested in heat recovery asking questions about desuperheating. This mode of heat recovery is based on circulating a fluid such as water through a heat exchanger to aid in transferring heat from one location to another. One of the major issues with utilizing the superheat of the discharge gas from a refrigeration systems is; there is not a lot of available heat! The available superheat in the discharge gas from a compressor is only a small percentage of the the total available heat energy.