Flow condensation heat transfer performance of natural and emerging synthetic refrigerants

Morrow, Jordan A.; Huber, Ryan A.; Nawaz, Kashif; Derby, Melanie M.

doi:10.1016/j.ijrefrig.2021.09.014

Cited by 10 publications

(2 citation statements)

References 90 publications

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“…In particular, for the condensation HTC, the Tao [96] correlation predicts the experimental data well, with an AAD of 7.4%. The maximum error in terms of AAD is 41% for the Shah correlation, as reported in [77]. For the evaporation HTC the proposed correlations show errors ranging from 4.7% to 40.9%, the best being those of Fang [144], Choi [25] and Zhang [110] with AADs of 4.7%, 11.09% and 11.4%, respectively.…”

Section: R717mentioning

confidence: 82%

A Systematic Review on Heat Transfer and Pressure Drop Correlations for Natural Refrigerants

Carella,

D’Orazio

2024

Energies

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Due to environmental concerns, natural refrigerants and their use in refrigeration and air conditioning systems are receiving more attention from manufacturers, end users and the scientific community. The study of heat transfer and pressure drop is essential for accurate design and more energy efficient cycles using natural refrigerants. The aim of this work is to provide an overview of the latest outcomes related to heat transfer and pressure drop correlations for ammonia, propane, isobutane and propylene and to investigate the current state of the art in terms of operating conditions. Available data on the existing correlations between heat transfer coefficients and pressure drops for natural refrigerants have been collected through a systematic search. Whenever possible, validity intervals are given for each correlation, and the error is quantified. It is the intention of the authors that this paper be a valuable support for researchers and an aid to design, with particular reference to heat pumps. A procedure based on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement was adopted, and the Scopus database was used to query the relevant literature. A total of 135 publications qualified for inclusion in the survey; 34 articles report experimental investigations for unusual geometric conditions. Of the 101 selected papers related to usual geometric conditions, N = 50 deal only with HTC, N = 16 deal only with pressure drop and the remainder (N = 35) analyse both HTC and pressure drop. Among the 85 HTC papers, N = 53 deal with the evaporating condition, N = 30 with condensation and only N = 2 with the heat transfer correlations under both conditions. Most of the 101 articles concern propane and isobutane. The high temperatures are less widely investigated.

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Section: R717mentioning

confidence: 82%

A Systematic Review on Heat Transfer and Pressure Drop Correlations for Natural Refrigerants

Carella,

D’Orazio

2024

Energies

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“…Some of these correlations are presented in Table 2, including the Shah [15] correlation. Morrow et al [20] tested the suitability of 12 correlations describing the condensation of refrigerants with low ODP and GWP. The comparison shows that the Cavallini et al [21] and Kim and Mudawar [22] correlations were the best predictors for emerging synthetic refrigerants (e.g., R1234yf, R1234ze (E), R32, R450A, R513A, etc.).…”

Section: 144mentioning

confidence: 99%

Modelling the Condensation Process of Low-Pressure Refrigerants in Mini-Channels

Sikora

Bohdal

2022

Materials

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The measure of the energy efficiency of the non-adiabatic two-phase condensation process of refrigerants in mini-channels is both the value of the heat transfer coefficient α and the flow resistance expressing the external energy input required to realize the flow. The modelling of this very complex process is effective if the condensation mechanism in mini-channels is correctly identified. It has been proven that the effects of changes in the condensation mechanism are the different structures of the two-phase flow resulting from process interactions both in the channel cross-section and along the flow path. The research aimed to connect the value of the heat transfer coefficient with the flow structures occurring during condensation. Thermal and visualization studies of the condensation process of low-pressure refrigerants were carried out: Novec649, HFE7100 and HFE7000 in tubular mini-channels with diameters dh = 0.5; 0.8; 1.2; 2.0 mm. Based on visualization studies, flow structures were proposed to be divided into 3 main groups: dispersive, stratified and intermittent. Based on this, a computational correlation was derived for determining the heat transfer coefficient and frictional resistance depending on the type of flow structure. The research shows that the highest values of the heat transfer coefficient occur during the mist flow and the lowest during the bubble flow.

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Experimental Study of the Condensation of Retrofit Refrigerant R32 Over Single Horizontal Plain and 2D Low-Finned Integral Tubes

Mohammed

Kumar

2023

Arab J Sci Eng

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Flow condensation heat transfer performance of natural and emerging synthetic refrigerants

Cited by 10 publications

References 90 publications

A Systematic Review on Heat Transfer and Pressure Drop Correlations for Natural Refrigerants

A Systematic Review on Heat Transfer and Pressure Drop Correlations for Natural Refrigerants

Modelling the Condensation Process of Low-Pressure Refrigerants in Mini-Channels

Experimental Study of the Condensation of Retrofit Refrigerant R32 Over Single Horizontal Plain and 2D Low-Finned Integral Tubes

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