The thermal performances of a refrigerator incorporating a phase change material

•Cyclic operations of an R-600a refrigerator equipped with PCM were investigated.•The effects of different control settings were shown.•The utilisation of PCM latent heat was estimated.•Product temperature fluctuation was reduced using PCM.•PCM ensured a better uniformity of the product temperature,...

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Veröffentlicht in:International journal of refrigeration 2019-04, Vol.100, p.255-264
Hauptverfasser: Maiorino, Angelo, Del Duca, Manuel Gesù, Mota-Babiloni, Adrián, Greco, Adriana, Aprea, Ciro
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container_end_page 264
container_issue
container_start_page 255
container_title International journal of refrigeration
container_volume 100
creator Maiorino, Angelo
Del Duca, Manuel Gesù
Mota-Babiloni, Adrián
Greco, Adriana
Aprea, Ciro
description •Cyclic operations of an R-600a refrigerator equipped with PCM were investigated.•The effects of different control settings were shown.•The utilisation of PCM latent heat was estimated.•Product temperature fluctuation was reduced using PCM.•PCM ensured a better uniformity of the product temperature, increasing with hysteresis. In this paper, a Phase Change Material (PCM) has been incorporated within the cabinet of a refrigerator, attached to the bare tube evaporator placed below the racks, with the aim of analysing the variation of temperatures and compressor operation, among others. The effect of different control settings (hysteresis) on the performance of such a system, equipped with tap water as PCM, is investigated. Furthermore, the impact of the variation of the ambient temperature and the product mass is highlighted. Two novel parameters are introduced: the first one to estimate the utilisation of the PCM during the cyclic operations of the refrigerator, and the second one is used to evaluate the fluctuation of the product temperature within the cabinet. Experimental results show that the introduction of the PCM has led to a noticeable reduction of the temperature gradient within the cabinet and the fluctuations of product temperature ensuring better conservation conditions, and to extend the OFF time of the compressor. The tests also show that with PCM, hysteresis has lower impact on the fluctuation of the product temperature, ON-time ratio and energy consumption of the refrigerator than without it. On the contrary, the product temperature distribution is more affected by the hysteresis with PCM than without, leading to a better uniformity with higher hysteresis.
doi_str_mv 10.1016/j.ijrefrig.2019.02.005
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Experimental results show that the introduction of the PCM has led to a noticeable reduction of the temperature gradient within the cabinet and the fluctuations of product temperature ensuring better conservation conditions, and to extend the OFF time of the compressor. The tests also show that with PCM, hysteresis has lower impact on the fluctuation of the product temperature, ON-time ratio and energy consumption of the refrigerator than without it. 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subjects Ambient temperature
Cold storage
Compressors
Drinking water
Energy consumption
Entreposage frigorifique
Evaporation
Evaporators
Hydrocarbons
Hydrocarbures
Hysteresis
Matériau à changement de phase (PCM)
ON/OFF control
Phase Change Material (PCM)
Phase change materials
Racks
Refrigerators
Régulation de la température
Temperature control
Temperature distribution
Temperature gradients
Time compression
Variations
title The thermal performances of a refrigerator incorporating a phase change material
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