Experimental performance study of R290 as an alternative to R22 refrigerant in a window air conditioner

Jawale, Vishakha S.; Keche, Ashok J.

doi:10.1088/1757-899x/377/1/012046

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…R290 (propane) has an Ozone Depletion Potential (ODP) of 0, a Global Warming Potential (GWP) of 20, a density of 580 kg•m −3 , and the advantages of being non-toxic, chlorine-free, and low in carbon. Its key thermophysical properties, such as its boiling point, freezing point, and critical point, are similar to those of R22, and it has excellent recyclability and is environmentally friendly; therefore, it is an ideal alternative refrigerant [2][3][4][5]. However, the application of R290 is limited due to the disadvantages of its flammability and explosiveness [6].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of the Heat Transfer Characteristics of R290 Flow Boiling in Corrugated Tubes with Different Internal Corrugated Structures

2021

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The heat transfer and pressure drop characteristics of R290 flow boiling in a corrugated tube were investigated through computational fluid dynamics (CFD) in this study. We established a model of flow boiling in a corrugated tube with different corrugated structures (rectangular and circular corrugations) and validated the model using the Liu–Winterton and Xu–Fang empirical equations. The heat transfer coefficient (HTC) and pressure drop were obtained at a mass flow rate of 0.04–0.2 kg/s and a water inlet temperature of 310–330 K. The results show that the HTC and the drop in the pressure of the corrugated tubes both obviously increased compared with a smooth tube as the mass flow rate increased. The HTC decreased for the three tubes as the water inlet temperature increased, while the drop in pressure slightly increased for the three tubes. Moreover, the corrugated structure was found to significantly enhance the heat transfer; the heat transfer enhancement factor (E1) of the corrugated tube with the rectangular corrugations and the corrugated tube with the circular corrugations was 2.01–2.36 and 1.67–1.98, respectively. The efficiency index (I) for both the rectangular corrugated pipe and the circular corrugated pipe was greater than 1 (1.05–1.24 and 1.13–1.29, respectively). The application of corrugated tubes with round and rectangular corrugations can reduce the heat transfer area required for the exchange of heat and, thus, reduce the cost.

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Section: Introductionmentioning

confidence: 99%

Numerical Investigation of the Heat Transfer Characteristics of R290 Flow Boiling in Corrugated Tubes with Different Internal Corrugated Structures

2021

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“…The R290 heat pump system has similar components and structure to the typical R134a heat pump system, as operation pressure of R290 is at the same level as R134a. Research into the R290 heat pump system in EVs is still at the early stage, but as a substitution of R22 in household air-conditioning system, R290 has been widely investigated for decades [10,[19][20][21]. In the heat pump system, R290 has shown a similar heating performance with CO 2 above −20°C and larger volume cooling capacity compared with R134a [17,22].…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on combustion characteristics of flammable refrigerant R290/R1234yf leakage from heat pump system for electric vehicles

Wang

Luo

et al. 2020

R. Soc. open sci.

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Concerning the issues regarding driving mileage reduction for electric vehicles (EVs) in cold climates, a heat pump system with low global warming potential refrigerant R290/R1234yf is employed as one of the promising solutions. Different from the widely used mobile refrigerant R134a, R290 and R1234yf are both flammable or explosive. The application of R290/R1234yf in the mobile heat pump system is hindered by unexpected refrigerant leakage with the existence of fire and explosion risk. In this study, the combustion characteristics of R290/R1234yf in a potential leakage process from an air-conditioning heat pump system for EVs were investigated. Firstly, thermodynamic behaviours of R290/R1234yf used in a typical heat pump system were analysed based on a special experimental facility designed for EVs. Then the leakage and combustion characteristics of R290/R1234yf including flame shape, temperature, radiation etc. were obtained by the experimental method under different initial temperature and mass flow rate conditions. It was found that R290/R1234yf leaked is difficult to ignite at low temperatures, while the blow-off phenomenon of the jet flame would occur at high temperature with high leakage mass flow rate. In addition, the results showed that combustion intensity would be enhanced by the leakage mass flow rate between 30 and 60°C. These results could provide guidance for fire detection and rescue system design for new energy vehicles.

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Experimental study on the failure of electronic expansion valve of a R290 split room air conditioner

et al. 2020

International Journal of Refrigeration

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Experimental performance study of R290 as an alternative to R22 refrigerant in a window air conditioner

Cited by 3 publications

References 4 publications

Numerical Investigation of the Heat Transfer Characteristics of R290 Flow Boiling in Corrugated Tubes with Different Internal Corrugated Structures

Numerical Investigation of the Heat Transfer Characteristics of R290 Flow Boiling in Corrugated Tubes with Different Internal Corrugated Structures

Experimental investigation on combustion characteristics of flammable refrigerant R290/R1234yf leakage from heat pump system for electric vehicles

Experimental study on the failure of electronic expansion valve of a R290 split room air conditioner

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