Boiling heat-transfer coefficient variation for R407C inside horizontal tubes of a refrigerating vapour-compression plant’s shell-and-tube evaporator

Torrella, E.; Navarro-Esbrí, Joaquin; Cabello, R.

doi:10.1016/j.apenergy.2005.01.010

Cited by 12 publications

(7 citation statements)

References 9 publications

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“…Torrella et al [6] investigated an experimental refrigerating vapour compression plant's shell and tube evaporator working with R407C. They have determined the influence of the From the literature survey, it can be seen that the boiling heat-transfer coefficient properties of R404A in a shell and tube heat exchanger do not exist in the literature, but some similar studies show similar trends.…”

Section: à2mentioning

confidence: 62%

“…To avoid this problem, the specific heat capacity of R404A is computed using the following expression [6,14]:…”

Section: Thermal Modelingmentioning

confidence: 99%

“…Glide and pressure drop result in a difference between the evaporator's inlet and outlet conditions, a fact that breaks the assumption of constant evaporating temperature and infinite specific heat capacity. To avoid this problem, the specific heat capacity of R404A is computed using the following expression [6,14]:…”

Section: Thermal Modelingmentioning

confidence: 99%

“…A short survey of the literature shows a number of studies that are related to boiling heat-transfer coefficient of refrigerants. Torrella et al [6] studied a shell and tube evaporator working with R407C in a refrigeration vapour compression plant. They investigated the influence of evaporating pressure and the refrigerant's mass flow rate on the refrigerant's boiling heat-transfer coefficient inside horizontal tubes.…”

Section: Introductionmentioning

confidence: 99%

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Thermal modeling of a shell and tube type evaporator with R404A

Kabul

Yakut

2011

Int. J. Energy Res.

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SUMMARYIn this study, the two-phase heat-transfer coefficient of R404A inside horizontal tubes is analyzed through the evaporator's overall heat-transfer coefficient, obtained using the effectiveness-Number of Transfer Units thermal design approach. This method constitutes an approximation that can be used in the evaporator's thermal design with an attempt to break some of the initial assumptions established in the heat exchanger thermal design method development. For the analysis, an experimental refrigeration system that is commercially available is built up with a shell and tube evaporator. All the experiments are performed at different evaporator pressures (270, 570 kPa), evaporator temperatures (À20, 01C) and cooling water temperatures (20, 401C). For these parameters, overall heattransfer coefficient of the heat exchanger is found in the range of 0.05-0.35 kW 1C À1.

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Section: à2mentioning

confidence: 62%

“…To avoid this problem, the specific heat capacity of R404A is computed using the following expression [6,14]:…”

Section: Thermal Modelingmentioning

confidence: 99%

Section: Thermal Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Thermal modeling of a shell and tube type evaporator with R404A

Kabul

Yakut

2011

Int. J. Energy Res.

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show abstract

“…Enrique Torrella et al [10] presented the work on evaporation of R407C in a refrigerating vapor compression plant's shell and tube evaporator using effectiveness-NTU method; concluding that the evaporating temperature presides the heat transfer coefficient than refrigerant's mass flow rate in the test range. S.Wellsandt et al [19] performed investigation on evaporation of R407C and R410A in a herringbone microfin tube with an outer diameter of 9.53 mm with end remark that at equal mass flow rates and temperatures the heat transfer coefficients for R410A and R407C are generally lower than that for R134a and starts to degrade earlier than R134a.…”

Section: Introductionmentioning

confidence: 99%