Development of Energy Efficient Electrical Household Appliances: Part 1, Refrigerators: Final Report

摘要

The work reported here was undertaken to verify conservation potentials by designing and building low energy refrigerator prototypes. The project was carried out in cooperation with the refrigerator manufacturer Brdr. Gram. Improved compressors were provided by the compressor manufacturer Danfoss. A 200 liter low energy refrigerator with no freezer compartment was designed. A few prototype cabinets were built with better insulation than usually. A compressor with improved performance was used in the refrigeration system installed in the cabinets. Furthermore, the evaporator and condensor were improved. The system is automatically defrosting. Electricity consumption for the low energy refrigerator was found to be 102 kWh/year under standard test conditions. This is about 20% of what a typical 1975-refrigerator of same size consumes, and 40% a current model consumes. However, experimental tests indicated that the insulation standard was better than anticipated, while the refrigeration system was performing below the expected. We conclude that further reduction in electricity consumption is possible through a better adapted compressor, better control systems, etc. 40 refs., 15 figs., 13 tabs. (ERA citation 13:034084)