Experimental Investigations on the Performance Enhancement Using Minichannel Evaporator with Integrated Receiver-Dryer Condenser in an Automotive Air Conditioning System

Prabakaran, Rajendran; Lal, D. Mohan; Arumugam, Prabhakaran; Kumar, Jha Kaushal

doi:10.1080/01457632.2018.1436663

Cited by 20 publications

(8 citation statements)

References 24 publications

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“…The charge optimisation study has been reported in our previous studies. 25 Initially the system was charged with 740 g of HFC-134a, and then the condenser/evaporator blower motor and compressor motor were switched ON. Then the required compressor speed, condenser air face velocity and evaporator air flow rate were fixed with the help of VFDs and RPS respectively.…”

Section: Methodsmentioning

confidence: 99%

“…Ravikumar et al 24 reported that use of the integrated receiver dryer (IRD) condenser instead of the conventional parallel flow condensers enhanced the MAC system performance with lesser amount of refrigerant inventory. Prabakaran et al 25 experimentally studied the performance enhancement of MAC system using IRD condenser and minichannel evaporator in place of the parallel flow condenser and the serpentine evaporator respectively. The results showed that the COP of the enhanced system was 15% and 8% higher than that of baseline system at low and high cabin temperature conditions respectively.…”

Section: Introductionmentioning

confidence: 99%

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Experimental studies on the performance of mobile air conditioning system using environmental friendly HFO-1234yf as a refrigerant

Prabakaran

Sidney

Ramakrishnan

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part E:

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In this work, the experimental investigation on the performance and exergy analysis of mobile air conditioning system with suction line heat exchanger using environmental friendly HFO-1234yf was carried out under varied evaporator air flow rates. The performance was compared with existing HFC-134a results. The performance analysis showed that the cooling capacity and the coefficient of performance of the system with HFO-1234yf were lower than that of the HFC-134a by upto 2–11%. The power consumption and the volumetric efficiency of the compressor with HFO-1234yf were found to be 14.02% and 11.2% higher than that of HFC-134a. From the exergy analysis, it was observed that the major exergy destruction occurred in the compressor, followed by the condenser, evaporator, thermostatic expansion valve, and suction line heat exchanger for both refrigerants. The exergy efficiency of the system with HFO-1234yf was 2.4–12.6% lower than that of HFC-134a. From this study, it was observed that the losses experienced in the compressor, thermostatic expansion valve and evaporator lead to poor performance with HFO-1234yf.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental studies on the performance of mobile air conditioning system using environmental friendly HFO-1234yf as a refrigerant

Prabakaran

Sidney

Ramakrishnan

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part E:

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“…The basic performance of refrigeration units are evaluated based on COP, which is the ratio between refrigeration capacity (Q evap ) and electrical power (W ele ) consumed by the refrigeration unit as in equation (1) 28…”

Section: Data Reduction Energy and Exergy Analysismentioning

confidence: 99%

Thermal analysis on optimizing the capillary tube length of a milk chiller using DC compressor operated with HFC-134a and environment-friendly HC-600a refrigerants

Sidney

Prabakaran

Lal

2019

Proceedings of the Institution of Mechanical Engineers, Part E:

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In this work, the thermal analysis on optimizing the capillary tube lengths of a dual circuit refrigeration system was carried out experimentally. Two refrigeration circuits were individually operated using two DC powered compressors (HFC-134a and HC-600a) instead of conventional AC powered compressors. The capillary tube optimization was done to maximize the coefficient of performance and exergy efficiency. From the results, it was found that the power consumption and the refrigerant mass flow rate decreases with the increase of capillary tube length for both the HFC-134a and HC-600a circuits, while the refrigeration capacity and coefficient of performance increased up to the capillary tube length of 4.57 m and then decreased. The maximum refrigeration capacity, ice formed, power consumption, and coefficient of performance experienced in the HC-600a circuit were 9.65%, 19.03%, 3.53%, and 7.34% lower than those of the HFC-134a circuit at the optimum capillary tube length. It was also found that at the optimum capillary length, the COP was maximum for the HFC-134a circuit while the exergy efficiency was maximum for the HC-600a circuit. The exergy efficiency of the HC-600a circuit was 11.13% higher than that of the HFC-134a circuit. At the optimum capillary tube length, the total equivalent warming impact values of the HFC-134a and HC-600a circuits were 961.13 kg CO2-eq and 785.77 kg CO2-eq, respectively.

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“…The PCM was selected based on the operating temperature range of the particular application considered in this study. Air temperature leaving the MAC system's cooling coil is in the range of 3-16 • C [29]. So, in this study, we chose the PCM whose phase change temperature was at~8 • C. For this application, commercially available fatty acid-based PCM OM08 with a phase change temperature of 8-9 • C was purchased from Pluss Technologies, India and its properties are shown in Table 2.…”

Section: Materials Selectionmentioning

confidence: 99%

Section: Materials Selectionmentioning

confidence: 99%

Solidification of Graphene-Assisted Phase Change Nanocomposites inside a Sphere for Cold Storage Applications

et al. 2019

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In this work, we experimentally investigated the solidification behavior of functionalized graphene-based phase change nanocomposites inside a sphere. The influence of graphene nanoplatelets on thermal transport and rheological characteristics of the such nanocomposites were also discussed. We adopted the covalent functionalization method to prepare highly stable phase change nanocomposites using commercially available phase change material (PCM) OM08 as the host matrix and graphene nanoplatelets (GnPs) with 0.1, 0.3, and 0.5 volume percentage as the nano inclusions. We report a maximum thermal conductivity enhancement of ~102 and ~46% with 0.5 vol% in the solid and liquid states, respectively. Rheological measurements show that the pure PCM shows Newtonian behavior, whereas the inclusion of GnPs leads to the transition to non-Newtonian behavior, especially at lower shear rates. Viscosity of the nanocomposite increases with an increase in the volume fraction of GnP. For 0.5 vol% of GnPs, maximum increase in viscosity was found to be ~37% at a shear rate of 1000 s−1. Time required for complete solidification decreases with the loading of GnPs. Maximum reduction in solidification time with 0.5 vol% of GnPs was ~40% for bath temperature of −10°C.

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Experimental Investigations on the Performance Enhancement Using Minichannel Evaporator with Integrated Receiver-Dryer Condenser in an Automotive Air Conditioning System

Cited by 20 publications

References 24 publications

Experimental studies on the performance of mobile air conditioning system using environmental friendly HFO-1234yf as a refrigerant

Experimental studies on the performance of mobile air conditioning system using environmental friendly HFO-1234yf as a refrigerant

Thermal analysis on optimizing the capillary tube length of a milk chiller using DC compressor operated with HFC-134a and environment-friendly HC-600a refrigerants

Solidification of Graphene-Assisted Phase Change Nanocomposites inside a Sphere for Cold Storage Applications

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