Performance of a single‐duct portable propane air conditioning system under different refrigerant charge levels

Siang, Jeri Tangalajuk; Sharifian, Ahmad

doi:10.1002/htj.21271

Cited by 5 publications

(3 citation statements)

References 18 publications

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“…The cooling capacity of R290 is slightly lower than its R22 (Park et al, 2007). Siang and Sharifian, 2017 found that the cooling capacity of R290 increases gradually from -20% undercharged -+30% overcharged.…”

Section: Research Backgroundmentioning

confidence: 88%

Physical Properties Analysis of Environmentally Friendly Refrigerant on the Convective Heat Transfer Coefficient

Siang¹,

Leda²,

Chairuddin³

2020

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The negative impacts of synthetic refrigerant on the environment are ozone depletion and global warming. In spite of all the new refrigerants has no ozone depletion potential (ODP), only the existing refrigerant R22 has ODP as 0.055, however, the global warming potential of the new refrigerants are high. Therefore the use of environmentally friendly refrigerants is a must. Propane (R290) and isobutene (R600a) are environmentally friendly refrigerants as the refrigerants have no ODP and negligible GWP. R290 is more efficiently than R22 because R290 has higher COP. One should be noted of two refrigerants, R290 and R600a is their flammability. Therefore, the amount of R290 or R600a should be minimized in refrigeration or air conditioning system. This research is conducted experimentally and theoretically comparing the effect of physical properties on the heat transfer process of the low mass of R290 and R290 -R600a blends. An increase in vapor quality decreases the convective heat transfer coefficient. This is due to the decrease in thermal conductivity and specific heat of the refrigerant with an increase in the vapor quality. R290 has the highest convective heat transfer coefficient while 60%R290 -40%R600a blend has the lowest convective heat transfer coefficient.

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Section: Research Backgroundmentioning

confidence: 88%

Physical Properties Analysis of Environmentally Friendly Refrigerant on the Convective Heat Transfer Coefficient

Siang¹,

Leda²,

Chairuddin³

2020

Self Cite

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“…R290 is a natural refrigerant with a mass and volumetric cooling capacity of 87.7% and 54.2% higher than other refrigerants (R134a), respectively [6]. In other studies, R290 was used in air conditioning and heat pump systems [17,18]. It was found that there was an improvement of 16.71% in the COP value in the steam compression refrigeration cycle, and it was observed that the cooling capacity increased by approximately 35% [15,19].…”

Section: Introductionmentioning

confidence: 99%

Experimental Assessment of Comparative R290vs. R449a Refrigerants by Using 3e (Energy, Exergy and Environment) Analysis: A Supermarket Application

Arslan

Koşan

Aktaş

et al. 2021

Journal of Thermal Engineering

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Efficiency is becoming an increasingly important issue in cooling systems. It is important to use micro channel heat exchangers in order to increase the cooling system efficiency. In this study, performance analysis of refrigerants used in supermarkets was tested experimentally. Thermodynamic analyses of the refrigerants were examined. The compatibility of R290 and R449A refrigerants with the environment has been experimentally observed. Energy, exergy, and environmental analyses were performed using R290 and R449a refrigerants based on the test results for 24 hours using double inlet and double outlet evaporator. Accordingly, in the experiments using R290, the exergy efficiency and COP value are 43.52 % and 2.09, respectively. In experiments using R449A, these values were found to be 22.28 % and 1.59. Exergy efficiency was increased by 48.81 % in experiments using propane. In addition, an increase of 24.12% was observed in the Coefficient of Performance (COP) value. Considering the environmental analysis results, the amount of CO2 emitted by the R290 refrigerant to the atmosphere during the test period was 3.14 kg/h and R449A was calculated as 3.97 kg/h. It was seen in this study that the R290 refrigerant emits 26.22 % less CO2 to the atmosphere.

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“…In order to find out optimal charge quantity of different refrigerants, the performance of the heat pump and the suction pressure of compressor were experimentaly studied by Afshari et al [11]. At ambient temperature 20-35 • C, the variation of system parameters with different refrigerant charge was studied by Siang et al [12]. It was found that refrigeration capacity and performance coefficient can be improved by increasing refrigerant charge, while specific refrigeration capacity of the system decreased.…”

Section: Introductionmentioning

confidence: 99%

A Study of Optimal Refrigerant Charge Amount Determination for Air-Conditioning Heat Pump System in Electric Vehicles

Jin

Liu

et al. 2020

Energies

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With regard to concerns about an electric vehicle’s driving range extension in a cold climate, an air-conditioning heat pump (ACHP) shows considerable advantage over thermoelectric heaters for battery energy conservation. The effect of refrigerant charge amount for cooling and heating performance of the ACHP system is significant. The optimal charge, realizing the optimal system performance, is usually determined by experiments of cooling and heating performance. In this paper, the optimal charge determination process based on a newly designed ACHP applied in electric vehicles was introduced. Relationships of characteristics with charge in two modes were investigated by experimental and theoretical methods. Firstly, the performance of the ACHP system was respectively investigated at different charge amounts in cooling and heating operating conditions according to key parameters of system cycles. Secondly, the intersection platforms of subcooling and superheat variation curves with refrigerant charge amount were obtained for determining optimal charge amount of the system further by comprehensive analysis. Finally, the theoretical calculation of charge with three instructive and classical void friction correlation models were applied for better comparisons. It was found that charge amount calculated by the Hughmark model proved to be most consistent with the comprehensive experimental results.

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Performance of a single‐duct portable propane air conditioning system under different refrigerant charge levels

Cited by 5 publications

References 18 publications

Physical Properties Analysis of Environmentally Friendly Refrigerant on the Convective Heat Transfer Coefficient

Physical Properties Analysis of Environmentally Friendly Refrigerant on the Convective Heat Transfer Coefficient

Experimental Assessment of Comparative R290vs. R449a Refrigerants by Using 3e (Energy, Exergy and Environment) Analysis: A Supermarket Application

A Study of Optimal Refrigerant Charge Amount Determination for Air-Conditioning Heat Pump System in Electric Vehicles

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