Experimental analysis of refrigerant mixtures flow through adiabatic capillary tubes

Fiorelli, Flávio Augusto Sanzovo; Huerta, Alex Alberto Silva; Silvares, Otavio de Mattos

doi:10.1016/s0894-1777(02)00158-9

“…The refrigerant flow through capillary tubes can be significantly influenced by the under-pressure of evaporation or the so-called metastability (Mikol and Dudley, 1964), leading to an increased liquid length and higher mass flow rate under otherwise equal operating conditions (Gonçalves, 1994;Meyer and Dunn, 1998). Models that describe this phenomenon (Chen et al, 1990) exist, but were shown to be unreliable (Melo et al, 1999b).…”

Section: Influence Of Metastabilitymentioning

confidence: 99%

Impact of neglecting the variations in the relative surface roughnesses of capillary tubes on the accuracy of a capillary tube model

Lorbek

¹

,

Katrašnik

²

,

Kitanovski

³

2021

International Journal of Refrigeration

0

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“…Rubas and Bullard [3] presented an experimental analysis of the refrigerant circulating in an A/C system and its general implications on the coefficient of performance (COP). Joudi et al [4], Lee and Loo [5], Kaynakli and Horuz [6], Buck [7], Kim et al [8] and Flavio et al [9] analyzed performance of an air conditioning system using different experimental methods. Ratts and Brown[10] used experimental methods to analyze an vehicle A/C system COP, focusing on the relationships between the COP and the compressor revolution and vehicle speed.…”

Section: Introductionmentioning

confidence: 99%

Effect of Condenser Temperature and Speed on one A/C System

Pan

¹

,

Tang

²

2011

AMR

1

0

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This study describes the results on the performance of one vehicle air conditioning system. The coefficient of performance, evaporator cooling capacity, compressor power consumption, total mass flow rate, vapor mass flow rate, liquid mass flow rate and oil in circulation, pressures and temperatures of refrigerant at every component (inlets and outlets) are measured and analyzed with the variation of the outside temperatures at the evaporator and condenser, the speed of the compressor, refrigerant charge and oil charge. The systematical experimental results obtained from this real-size test system depict the relations between the above parameters in a vehicle air conditioning system, which constitute a useful source for vehicle air conditioning systems design and analysis. The vapor quality (two-phase flow) measurements realized in this work provide an extremely important tool for diagnosing the system performances.

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“…Rubas and Bullard [3] presented an experimental analysis of the refrigerant circulating in an A/C system and its general implications on the coefficient of performance (COP). Joudi et al [4], Lee and Loo [5], Kaynakli and Horuz [6], Buck [7], Kim et al [8] and Flavio et al [9] analyzed performance of an air conditioning system using different experimental methods. Ratts and Brown[10] used experimental methods to analyze an vehicle A/C system COP, focusing on the relationships between the COP and the compressor revolution and vehicle speed.…”

Section: Introductionmentioning

confidence: 99%

Effect of Refrigerant Charge and Inlet Air Temperature on One A/C System

Pan

¹

,

Tang

²

2011

AMM

0

View full text Add to dashboard Cite

This study describes the results on the performance of one vehicle air conditioning system. The coefficient of performance, evaporator cooling capacity, compressor power consumption, total mass flow rate, vapor mass flow rate, liquid mass flow rate and oil in circulation, pressures and temperatures of refrigerant at every component (inlets and outlets) are measured and analyzed with the variation of the outside temperatures at the evaporator and condenser, the speed of the compressor, refrigerant charge and oil charge. The systematical experimental results obtained from this real-size test system depict the relations between the above parameters in a vehicle air conditioning system, which constitute a useful source for vehicle air conditioning systems design and analysis. The vapor quality (two-phase flow) measurements realized in this work provide an extremely important tool for diagnosing the system performances.

show abstract

Experimental analysis of refrigerant mixtures flow through adiabatic capillary tubes

Cited by 36 publications

References 6 publications

Impact of neglecting the variations in the relative surface roughnesses of capillary tubes on the accuracy of a capillary tube model

Impact of neglecting the variations in the relative surface roughnesses of capillary tubes on the accuracy of a capillary tube model

Effect of Condenser Temperature and Speed on one A/C System

Effect of Refrigerant Charge and Inlet Air Temperature on One A/C System

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