The Refrigeration Playbook: Heat Reclaim provides guidance for reducing the energy consumption of refrigeration systems by reducing the load on the system and reclaiming waste heat for use in the building service hot water and HVAC systems. The intended audience of this “playbook” includes building owners, operators, designers, and installers though many of the calculation procedures are The Refrigeration Playbook: Heat Reclaim provides guidance for reducing the energy consumption of refrigeration systems by reducing the load on the system and reclaiming waste heat for use in the building service hot water and HVAC systems.
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This report provides guidance for selecting and designing energy efficient commercial refrigeration systems using low global warming potential refrigerants. Refrigeration systems are generally the largest energy end use in a supermarket type building, often accounting for more than half of a building’s energy consumption.
Walmart opened two experimental stores—one in Colorado and one in Texas—in 2005 to serve as test beds for several advanced building systems. Each store embodied more than 50 experiments covering materials, water systems, energy systems, and renewable energy production. The energy system performance was compared to the measured performance of a prototypical Walmart store and to other benchmarks where appropriate.
Defrost Temperature Termination in Supermarket Refrigeration Systems
Waste Heat Recapture from Supermarket Refrigeration Systems
The objective of this project was to determine the potential energy savings associated with reducing the relative humidity in the vicinity of refrigerated display cases in supermarkets, as compared to the widely
accepted current practice of maintaining a relatively higher and uniform humidity level throughout the entire supermarket. Existing and new strategies for maintaining lower relative humidity levels near the vicinity of refrigerated display cases were analyzed to determine their effectiveness and limits of application.
The objective of this project was to determine the potential energy savings associated with implementing demand defrost strategies to defrost supermarket refrigerated display case evaporators, as compared to the widely accepted current practice of controlling display case defrost cycles with a preset timer. The defrost heater energy use of several representative display case types was evaluated. In addition, demand defrost strategies for refrigerated display cases as well as those used in residential refrigerator/freezers were evaluated.