Test Results of Hydrocarbon Mixtures in Domestic Refrigerators/Freezers
نویسندگان
چکیده
In the first part of the present research, an R290/R600 mixture was tested as a drop-in substitute in a 20cubic-feet, single-evaporator, autodefrost, topmount, conventional domestic refrigerator/freezer. All the hardware remained the same, only the capillary tube was lengthened to achieve the optimum performance. The best result with an optimized R290/R600 blend was 6% savings compared to the baseline test with R12. In the second part of the research, an 18.0cubic-feet, autodefrost, topmount, domestic refrigerator was used for experiments. Having tested for the single-evaporator baseline performance, the unit was converted to a two-evaporator modified-lorenzMeutzner cycle. The optimum performance of the modified unit yielded 14.6% and 16.7% energy savings with binary mixtures R290/nc5, and R290/R600, respectively. A ternary mixture R290/R600/n-c5 with 17.3 % energy savings proved to be better than the binary mixtures. The superior transport properties of the hydrocarbon mixtures are believed to be responsible for their better test performance.
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