Experimental investigation of vapour compression chiller based on transient cooling performance influenced by expansion devices

Sutthivirode, Kittiwoot; Thongtip, Tongchana

doi:10.1016/j.csite.2020.100669

Cited by 8 publications

(1 citation statement)

References 34 publications

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“…Using refrigeration machines to produce useful cooling production faces a problem of energy shortages in the future because most machines are electrically powered by vaporcompression systems. Therefore, many efforts to reduce the electricity consumption for the refrigeration process have been made by researchers [1][2][3][4][5][6][7][8]. The use of a heat-powered refrigeration machine is a promising solution to reduce the electricity consumption because it satisfies the cooling purposes, as well as providing a huge reduction in electrical energy consumption.…”

Section: Introductionmentioning

confidence: 99%

Experimental Determination of an Optimal Performance Map of a Steam Ejector Refrigeration System

Sutthivirode

Thongtip

2022

Energies

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An experimental determination of optimal performance of a steam ejector refrigerator was proposed which aims to indicate the optimal performance under various heat source temperatures. A small-scale steam ejector refrigerator test bench was constructed to carry out the experiment and to determine the optimal performance map. Three primary nozzles with throat diameters of 1.4, 1.6, and 1.8 mm, were tested with an ejector throat diameter of 14.5 mm, providing the ejector area ratios of 107, 82, and 65, respectively. For a particular working condition, the boiler temperature was varied to determine the maximum COP which is recognized as the optimal operation. It was found that the secondary fluid stream is first choked at the optimal boiler temperature. This optimal point varied significantly with the evaporator temperature, condenser pressure, and ejector area ratios. It was found that this steam ejector refrigerator could be operated under the optimal boiler temperature between 102.5 and 117.5 °C depending on the ejector area ratio, evaporator temperature, and condenser pressure. The optimal performance map is beneficial to further control the heat source temperature so that the maximum COP is achieved.

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