Low Head Pressure Operation of Commercial Systems
Low Head Pressure Operation of Commercial Systems (2020) - Commercial refrigeration compressors account for approximately one-third of the energy a grocery store consumes. Commercial systems in the United States do not typically utilize liquid refrigerant pumps and instead use system pressure to feed liquid to the cases. The high-side liquid pressure is often a limiting factor for low head pressure operation. Retrofitting existing refrigeration systems with liquid pumps and other components is possible to allow for operating systems with a significant reduction in minimum head pressure operation. This paper will explore a common rack system design, break down the components (beyond liquid pumps) that are limiting factors for low head pressure operation, and provide a methodology to establish operational boundaries for low head pressure operation based on the common refrigeration system components’ limiting factors.
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