Performance enhancement study of mobile air conditioning system using microchannel heat exchangers

Qi, Zhaogang; Zhao, Yangping; Chen, Jiangping

doi:10.1016/j.ijrefrig.2009.08.014

Cited by 58 publications

(20 citation statements)

References 10 publications

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“…This conclusion provides a basis for selecting the fin type for outdoor heat exchangers. AC systems with micro-channel heat exchangers were proposed in [58][59][60]. The representative micro-channel evaporator is shown in Figure 5 [60].…”

Section: Novel Componentsmentioning

confidence: 99%

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Progress in Heat Pump Air Conditioning Systems for Electric Vehicles—A Review

Qing-hong

2016

Energies

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Electric vehicles have become increasingly popular in recent years due to our limited natural resources. As a result, interest in climate control systems for electric vehicles is rising rapidly. According to a variety of research sources, the heat pump air conditioning system seems to be a potential climate control system for electric vehicles. In this paper, an extensive literature review has been performed on the progress in heat pump air conditioning systems for electric vehicles. First, a review of applications of alternative environmentally friendly refrigerants in electric vehicles is introduced. This is followed by a review of other advanced technologies, such as the inverter technology, innovative components and the system structure of the heat pump air conditioning system for electric vehicles. Lastly, recent developments in multiple source heat pump systems are presented. The use of these advanced technologies can provide not only sufficient refrigerating capacity for the electric vehicle, but also higher climate control system efficiency. We believe that ideal practical air conditioning for electric vehicles can be attained in the near future as the mentioned technical problems are gradually resolved.

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Section: Novel Componentsmentioning

confidence: 99%

“…AC systems with micro-channel heat exchangers were proposed in [58][59][60]. The representative micro-channel evaporator is shown in Figure 5 [60]. In addition to compressors, heat exchangers also have research highlights.…”

Section: Novel Componentsmentioning

confidence: 99%

Progress in Heat Pump Air Conditioning Systems for Electric Vehicles—A Review

Qing-hong

2016

Energies

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“…They reported that the cooling capacity and coefficient of performance (COP) of the designed system in FGB mode were improved 13%-18% and 4%-7%, respectively, compared with that of the DX mode [10]. Qi et al (2010) investigated experimentally on performance enhancement of an automotive air conditioning system using newly developed micro-channel heat exchangers with lower weight and volume compared with conventional and currently used heat exchangers. They reported that the COP of the designed system under all the other test conditions except the idle condition was higher than that of the conventional system.…”

Section: Introductionmentioning

confidence: 99%

“…They reported that the COP of the designed system under all the other test conditions except the idle condition was higher than that of the conventional system. In addition, the cooling capacity of the designed system increased by 5% and the COP improved by 7.9% under high vehicle speed [11]. Lee and Jung (2012) studied the performances of R1234yf and R134a in a heat pump bench tester under the conditions for automotive air-conditioners.…”

Section: Introductionmentioning

confidence: 99%

Design and Cooling Performances of an Air Conditioning System with Two Parallel Refrigeration Cycles for a Special Purpose Vehicle

Moo-Yeon

2017

Applied Sciences

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Abstract:The objective of this study is to design and briefly investigate the cooling performances of an air conditioning system for a special purpose vehicle under various experimental conditions. An air conditioning system with two parallel refrigeration cycles consisting of two compressors and two condensers for satisfying the required cooling performance of the special purpose vehicle was tested under extremely hot weather conditions and high thermal load conditions and then optimized by varying the refrigerant charge amount.

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“…In recent years, new condenser design concept called sub-cooling parallel flow (SPF) is provided in the microchannel condenser which enhances the system performance in which the receiver-dryer is integrated with condenser core before the last one or two refrigerant passes. The performance of microchannel condenser is dependent on different parameters such as refrigerant charge, size of the receiver, sub-cooling area, pass structure, position of the receiver with respect to the condenser passes and liquidvapor separation in the receiver [22]. If the hydrocarbon refrigerant charge in the VCR system is below 150 g the chances of explosion are nil even though all the refrigerant comes out of the system, as the lower flammability limit dose not reach to the flammable level even though the room size is very small (4m × 4m × 4m) [23].…”

Section: Introductionmentioning

confidence: 99%

EXPERIMENTAL ANALYSIS OF MICROCHANNEL CONDENSER USING R134a AND DROP IN SUBSTITUTE HYDROCARBON MIXTURE OF R290 AND R600a

Bhatkar¹,

Kriplani²,

Awari³

2014

Int. J. Automot. Mech. Eng.

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Microchannel condensers are widely used in automobile and household air conditioners with R134a as a refrigerant. In order to reduce the global warming potential as well as the refrigerant charge, hydrocarbon mixture of R290 and R600a (50:50 % by mass) was used as a drop in substitute to R134a in the vapour compression refrigeration system. Versatile vapour compression refrigeration system of 1 ton of refrigeration capacity was designed, developed and fabricated for testing different refrigerants. Various parameters such as ambient temperature in the condenser cabin, different condensation and evaporation temperatures, different mass flow rates of refrigerant and air can be controlled precisely in the test rig. Experiments were performed using R134a and hydrocarbon mixture of R290 and R600a (50:50 % by mass) for condensation temperature of 44°C and evaporation temperature ranging from -15 to 15 °C. Refrigerant charge was reduced by 45 % with the hydrocarbon mixture of R290 and R600a (50:50 % by mass) over R134a. Performance parameters such as compressor power consumption increases by 13.3 %, coefficient of performance reduced by 43 %, refrigeration capacity increased by 140.8 %, condenser capacity increased by 185.4 % and the product of overall heat transfer coefficient and surface area of condenser was increased by 243.7 % by using hydrocarbon mixture of R290 and R600a (50:50 % by mass) over R134a with the microchannel condenser at condensation temperature of 44°C and evaporation temperature of 0°C. It is suggested to use an environmental friendly refrigerant, hydrocarbon mixture of R290 and R600a (50:50 % by mass) as a drop in substitute to the conventional refrigerant R134a in the automobile, household air conditioning and refrigeration systems.

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Performance enhancement study of mobile air conditioning system using microchannel heat exchangers

Cited by 58 publications

References 10 publications

Progress in Heat Pump Air Conditioning Systems for Electric Vehicles—A Review

Progress in Heat Pump Air Conditioning Systems for Electric Vehicles—A Review

Design and Cooling Performances of an Air Conditioning System with Two Parallel Refrigeration Cycles for a Special Purpose Vehicle

EXPERIMENTAL ANALYSIS OF MICROCHANNEL CONDENSER USING R134a AND DROP IN SUBSTITUTE HYDROCARBON MIXTURE OF R290 AND R600a

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