Flow characteristics of HFC407C/HC600a/HC290 refrigerant mixture in adiabatic capillary tubes

Jabaraj, D.B.; Kathirvel, Arumugam; Lal, D. Mohan

doi:10.1016/j.applthermaleng.2005.11.017

Cited by 33 publications

(16 citation statements)

References 6 publications

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“…A comparison of their results with their data indicates a deviation of 6.5%. Jabaraj et al 2006 [25] conducted an experimental study on the flow of refrigerant mixture M20 (R-407c, R-600, and R-290) through capillary tubes. By using Buckingham's π theory, they developed a non-dimensional correlation to predict critical mass flow rate of M20.…”

mentioning

confidence: 99%

Numerical-based non-dimensional analysis of critical flow of R-12, R-22, and R-134a through horizontal capillary tubes

Javidmand

Hoffmann

2015

International Journal of Refrigeration

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confidence: 99%

Numerical-based non-dimensional analysis of critical flow of R-12, R-22, and R-134a through horizontal capillary tubes

Javidmand

Hoffmann

2015

International Journal of Refrigeration

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“…Based on the Buckingham Pi theorem, analysis of all the variables in Eq. 1with four repeating variables and [17][18][19] gives eight nondimensional Pi groups. In Eq.…”

Section: Development Of Correlationmentioning

confidence: 99%

Taguchi Method for Development of Mass Flow Rate Correlation using Hydrocarbon Refrigerant Mixture in Capillary Tube

et al. 2014

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The capillary tube is an important control device used in small vapor compression refrigeration systems such as window air-conditioners, household refrigerators and freezers. This paper develops a non-dimensional correlation based on the test results of the adiabatic capillary tube for the mass flow rate through the tube using a hydrocarbon refrigerant mixture of 89.3% propane and 10.7% butane (HCM). The Taguchi method, a statistical experimental design approach, was employed. This approach explores the economic benefit that lies in studies of this nature, where only a small number of experiments are required and yet valid results are obtained. Considering the effects of the capillary tube geometry and the inlet condition of the tube, dimensionless parameters were chosen. The new correlation was also based on the Buckingham Pi theorem. This correlation predicts 86.67% of the present experimental data within a relative deviation of-10% to +10%. The predictions by this correlation were also compared with results in published literature.

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“…Several researchers have also collected large sets of experimental data measured with capillary tubes of different lengths and inner diameters. A few of them should be noted: Melo et al [9], Kim et al [10], Choi et al [11], and Jabaraj et al [12]. Dimensional analysis of the experimental data provides relatively simple and accurate predictions of the mass flow rate.…”

Section: Capillary Flow Studiesmentioning

confidence: 99%

Two-Phase Flow Analyses During Throttling Processes

Vacek

Vinš

2009

Int J Thermophys

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This study presents an experimental investigation of the throttling process of saturated fluorocarbon refrigerants (such as R116, R218, and R610) inside capillary tubes. For the detailed two-phase flow analyses, refrigerant R218 was selected. A divided capillary tube was prepared with a set of precise pressure and temperature sensors providing detailed information about the refrigerant flow behavior inside the tube. The metastable flow regions of the superheated liquid and of the two-phase vapor-liquid mixture were clearly detected. A correlation for the 'underpressure' of vaporization applicable for capillary flow of fluorocarbon refrigerants was determined. New experimental data were compared with a modified numerical model simulating all four capillary flow regions. A negative effect of non-condensing gases present within the cooling circuit on the overall capillary tube performance was experimentally noted. List of Symbols CCoefficient D Reference length, m Gb Gibbs number ID Inner diameter, m

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Flow characteristics of HFC407C/HC600a/HC290 refrigerant mixture in adiabatic capillary tubes

Cited by 33 publications

References 6 publications

Numerical-based non-dimensional analysis of critical flow of R-12, R-22, and R-134a through horizontal capillary tubes

Numerical-based non-dimensional analysis of critical flow of R-12, R-22, and R-134a through horizontal capillary tubes

Taguchi Method for Development of Mass Flow Rate Correlation using Hydrocarbon Refrigerant Mixture in Capillary Tube

Two-Phase Flow Analyses During Throttling Processes

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