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Article Dans Une Revue AIP Conference Proceedings Année : 2017

Impact of operating conditions on cooling capacity for sorption systems using water as refrigerant

Résumé

The implementation of compact heat exchanger in sorption systems is a key factor to allow the development of these systems. The aim of this paper is to develop a statistical model with a design of experiment (DOE) methodology and use dimensionless number to evaluate and understand the influence of the height of refrigerant liquid and secondary fluid inlet temperature on cooling capacity of a compact pate-type evaporator for sorption systems working near vacuum pressure. For this purpose, an experimental campaign was conducted on a small adsorption test bench using 13X/water as working couple. Cooling capacities from 640 to 2000 W were measured. The DOE is a Doelhert type with two parameters: the inlet secondary fluid temperature (from 10 to 21 °C) and the filing level of refrigerant in the evaporator (from 6 to 24 cm). Thanks to the exploitation of the mathematical model obtained, optimal points under different constraints were found. A maximum cooling capacity of 2021 +/−75 W in the entire experimental field was predicted for a secondary fluid inlet temperature of 25°C and a height of liquid level of 19.2 cm. Bond number and modified Jacob number per the ratio Psat/Ptriple were analyzed. The dimensionless numbers are correlated to the cooling capacity as a first step for designing compact plate-type evaporator for adsorption systems using water as refrigerant.
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Dates et versions

hal-01505320 , version 1 (11-04-2017)

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Brice Tremeac, Florine Giraud, Pierrick Vallon. Impact of operating conditions on cooling capacity for sorption systems using water as refrigerant . AIP Conference Proceedings, 2017, 1814, ⟨10.1063/1.4976259⟩. ⟨hal-01505320⟩
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