A comparison of phase change phenomena in CTH with experimental data

The thermal performance of an air-heated/cooled, phase-change, heat stoage module was tested and evaluated. The module (rated at 38.7 kWh) consist of 130 vertically oriented tubes filled with 729 kg (1607 lb) of calcium chloride hexahydrate and enclosed in a rectangular box. Heat transfer rates measured during charging and discharging decreased with time as a result of decreasing effective heat transfer area and increasing thermal resistance of the phase-change material. These two dominant effects are included in a proposed mathematical model that predicted the experimental data.

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Shock Wave Propagation in Low Temperature Fluids and Phase Change Phenomena

Adiabatic Waves in Liquid-Vapor Systems ◽

10.1007/978-3-642-83587-2_7 ◽

1990 ◽

pp. 69-78

Author(s):

K. Maeno

Keyword(s):

Shock Wave ◽

Wave Propagation ◽

Low Temperature ◽

Phase Change ◽

Shock Wave Propagation ◽

Phase Change Phenomena

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Transient modeling for the prediction of the temperature distribution with phase change material in a salt-gradient solar pond and comparison with experimental data

Journal of Energy Storage ◽

10.1016/j.est.2019.101011 ◽

2019 ◽

Vol 26 ◽

pp. 101011 ◽

Cited By ~ 5

Author(s):

Alireza Jafar Gholi Beik ◽

Mohammad Reza Assari ◽

Hassan Basirat Tabrizi

Keyword(s):

Experimental Data ◽

Temperature Distribution ◽

Phase Change ◽

Phase Change Material ◽

Solar Pond ◽

Transient Modeling ◽

Salt Gradient ◽

Change Material ◽

Comparison With Experimental Data

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Experimental research on hydrodynamic instabilities during condensation of the pro-ecological refrigerant R1234yf in tubular minichannels

E3S Web of Conferences ◽

10.1051/e3sconf/20187002010 ◽

2018 ◽

Vol 70 ◽

pp. 02010

Author(s):

Waldemar Kuczyński ◽

Aleksander Denis

Keyword(s):

Experimental Data ◽

Phase Change ◽

Experimental Research ◽

Change Process ◽

Internal Diameter ◽

Hydrodynamic Instabilities ◽

Condensation Zone ◽

Phase Change Process ◽

Flow Condensation ◽

Propagation Velocities

The following paper presents the results of preliminary experimental research on the influence of instabilities of a hydrodynamic type on the condensation phase change process in tubular minichannels. The research was focused on a new pro-ecological refrigerant, R1234yf, intended as a substitute for R134a that currently is being phased out. The flow condensation phase change process was investigated for both steady and un-steady conditions in singular tubular minichannels with an internal diameter d = {1,44; 2,30; 3,30} mm. The scope of the analysis of the experimental data covered an estimation of propagation velocities for both pressure and temperature instabilities as well as the shrinkage of the condensation zone. The results were also compared with the previous results obtained for the flow condensation phase change of R134a refrigerant in tubular minichannels with the same internal diameters.

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