Experimental tests and computer simulation results of Lorenz and Meutzner’s two-evaporator refrigerators are reported. Zeotropic refrigerant mixtures were used as working fluids and theoretically shown to increase the coefficient of performance (COP) by 16% to 20% compared to conventional single-evaporator refrigerators. Experimentally, a refrigerator converted to a Lorenz-Meutzner cycle showed a 9% reduction in energy consumption compared to an original production unit of a 557.0-litre (20.0 ft3), side-by-side upright refrigerator. Cycling operation of refrigerators degraded the performance of zeotropic refrigerant mixtures 6% more than R12. With a further optimisation of cycles, heat exchangers, and mixtures, Lorenz and Meutzner’s two-evaporator refrigerators can be one of the viable candidates to help alleviate global energy and environmental problems.
KEYWORDS: testing, domestic, evaporators, refrigerators, refrigerators, mixtures, non azeotropic, cyclic, operations, performance, R12, heat exchangers, energy consumption, coefficient of performance, Lorenz cycle
Citation: ASHRAE Trans. 1992, vol.98, Part 2, Paper number 3620, 216-226, 7 figs., 3 tabs., refs.
Product Details
- Published:
- 1992
- File Size:
- 1 file , 1.4 MB
- Product Code(s):
- D-17778
