Performance Evaluation of Automotive HVAC System with the Use of Liquid Cooled Condenser

Banakar, Shivakumar; Limperich, Dirk; Asapu, Ramesh; Panneerselvam, Vaishnavi; Singh, Madhu

doi:10.4271/2014-01-0681

Cited by 7 publications

(3 citation statements)

References 2 publications

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“…According to current standards, subsystems, such as the condenser, air cooler, oil cooler, or engine coolant, have their own cooling systems. Thus, the literature cites cooling configurations and system changes to the HVAC refrigeration cycle [12], which is an important point to consider in the present study.…”

Section: State Of the Artmentioning

confidence: 99%

Quality Study on Vehicle Heat Ventilation and Air Conditioning Failure

2021

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The automotive industry has set a highly demanding standard to meet customer satisfaction. The paper aimed to detail how quality analysis has been conducted to state the main causes that generated nonconformities of heat, ventilation and air conditioning (HVAC) systems. Problems have been reported on HVAC systems, such as noise, not being cold enough and moldy smell issues. All three problems determined by customer reports initiated the first contribution of this paper, namely by an initial quality study, and generated the investigation using is/is not problem scoping, data analysis, and graphical analysis. Pareto analysis and the Plan, Do, Check and Act (PDCA) approach are used to highlight the traceability of the actions performed in the evaluation of the problems and the detection of the causes related to each problem. The data analysis process and the data obtained from the analysis are the core of this paper. An immediate action plan is proposed, concluding with the hypothesis that the root cause is the blockage of the heater. This methodology has significant potential for being implemented, even for other components in the same industry or different sectors.

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Section: State Of the Artmentioning

confidence: 99%

Quality Study on Vehicle Heat Ventilation and Air Conditioning Failure

2021

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“…Air-cooled tube-fin heat exchangers are usually used as a condenser in the conventional automotive HVAC systems. Use of a liquid cooled heat exchanger as a condenser will be beneficial considering the size of the system [11].…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on the Cooling Performance of Refrigerant (R134a/R1234yf) in Automobile HVAC System

CS,

2023

ijmst

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The present work deals with the experimental investigation on the performance evaluation of R134a and R1234yf as automotive HVAC refrigerants. As the usage of R134a increases environmental issues due to its higher global warming potential (GWP), it is necessary to find an alternative without compromising the performance of the HVAC system. R1234yf having low GWP is one such drop-in alternative. But the COP of the system using R1234yf is observed to be low. Hence this work investigates on the effects of using an internal heat exchanger (IHX) with the conventional automotive HVAC system in the performance enhancement. The results indicate acceptable range of cooling capacity, COP and compressor discharge temperature for R1234yf when integrated with IHX and a high efficiency evaporator. COP of the R1234yf IHX system is observed to higher than the COP of R134a baseline system. The results of cooling capacity and compression discharge temperature of R1234yf IHX system also shows an enhancement and matches with the corresponding values of R134a baseline system.

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“…Other opportunities to integrated thermal management are referred to the cooling of the intake air of the engine, by means of water charge air cooler or chiller-based system, in order to increase engine volumetric efficiency [24,25]. Air conditioning unit can be also integrated into the cooling systems, particularly considering a liquid cooled condenser [26,27]. Moreover, multi temperature radiators and improved fan will lead to a reduction of heat exchanger sizes, frontal area occupation and reduction of drag coefficient of the vehicle [28].…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical analyses to improve the design of engine coolant pumps

et al. 2020

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In this paper, an experimentally based procedure is presented to re-orient the design point of the pump in order to minimize the energy absorbed during the homologation cycle or during any real driving one. During it, in fact, every benefit on the pump’s efficiency is appreciated and produces fuel consumption and CO2 reduction. The procedure takes the advantage from a dynamic test bench for coolant pump, realized and engineered at University of L’Aquila. It has been linked to a model-based methodology, which evaluates, according to a specified vehicle’s mission profile, the speed and load variation of the engine propelling the vehicle, and, therefore, the pump speed. The knowledge of the engine cooling circuit for closed and fully opened thermostat allows the calculation of the flow rates and pressure delivered in each time instant of the drive cycle. The speed-flow rate-pressure delivered pump profile has been reproduced on the bench, and all the relevant quantities have been measured: an exact evaluation of the scatter of the efficiency of the pump, the instantaneous power and the overall energy absorbed have been obtained. Results show how the pump efficiency is far from its Best Efficiency Point. This conclusion invited the Authors to reorient the design pump considering an operating condition, which has a greater occurrence among all the operating points characteristic of a drive cycle. Four pumps have been designed following this approach, showing a sensible reduction of the energy absorbed: this represents a key point also for pump electrification.

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Performance Evaluation of Automotive HVAC System with the Use of Liquid Cooled Condenser

Cited by 7 publications

References 2 publications

Quality Study on Vehicle Heat Ventilation and Air Conditioning Failure

Quality Study on Vehicle Heat Ventilation and Air Conditioning Failure

An Experimental Study on the Cooling Performance of Refrigerant (R134a/R1234yf) in Automobile HVAC System

Experimental and numerical analyses to improve the design of engine coolant pumps

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