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Showing 1 to 11 of 11 for “"automotive air conditioning"”.
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Distribution of refrigerant and lubricant in automotive air conditioning systems
In automotive air conditioning (A/C) systems, the compressor lubricant is circulated throughout the system with refrigerant. At different oil concentrations, the circulating mixture exhibits different properties, which affects the characteristics of heat transfer, pressure drop and mass retention …
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Using Vibration Analysis to Determine Refrigerant Levels In an Automotive Air Conditioning System
… the amount of refrigerant (R-134a) in an air conditioning system of an automobile. In the research presented, vibration analysis is examined as a possible method to determine this R-134a amount. Initial laboratory tests were completed and experimental modal analysis methods were …
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The design and control strategies for automotive air conditioning systems using motor driven, variable speed centrifugal compressors
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1995.
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Effect of oil in circulation on automotive A/C component and system performance
In Automotive air-conditioning system, oil is mixed with refrigerant and runs in the system. Although some amount of oil is beneficial to compressor to reduce compressor wear and prevent leakage, the existence of oil in circulation influences the performance of the air-conditioning system and …
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Vapor-liquid equilibria of a low GWP refrigerant, R-1234ze(E), mixed with a POE lubricant
… especially valuable for engineers working in the automotive air-conditioning and refrigeration industries. The refrigerant R-1234ze(E) is one of the leading alternatives for replacing R-134a and is a member of the HFO family of chemicals that includes other low-GWP refrigerants. Accurate models …
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Experimental study of reversible AC/HP system for electric vehicles
… Vapor compression cycle is commonly used for automotive air conditioning. By moderate modification of the air conditioning system, heat pump function can be obtained. A heat pump test setup has been built in the lab based on the heat pump system from a commercially available EV, with necessary …
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TRANSIENT PERFORMANCE EVALUATION OF AUTOMOTIVE SECONDARY LOOP SYSTEMS
Automotive air-conditioning is a high impact technology where improvements in energy consumption and environmental performance can make a significant difference in fuel efficiency and comfort. The mandatory phase out of R134a as refrigerant in the European Union has set the stage for new systems …
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Tribology of engineering and coated materials in the presence of environmentally friendly refrigerant
… evaluated prior to widely used in refrigeration/ air-conditioning systems. Along this line, we have investigated the tribological performance of HFO-1234yf refrigerant under aggressive boundary lubrication conditions. Specifically, we have performed controlled tribo-experiments, simulating actual …
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Role of internal heat exchanger in air conditioning systems
… has been implemented into refrigeration and air-conditioning industry for a long time because of its ability to improve the efficiency of refrigeration cycles for several commonly used and potential substitution of refrigerants (R134a, R744 and R1234yf among them). It provide extra heat …
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Design and Optimization of Adsorption Systems for Automotive Climate Control
… presented by climate change, spanning direct air carbon capture, to atmospheric water harvesting, to thermal energy storage. Decades of research and development have led to the optimization of adsorption materials to customize them for a specific application by tailoring their affinity for …
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Thermo-hydraulic study of inclined louvered fins
… research project focuses on space heating and air conditioning, which contributes a large share of the total domestic energy consumption. The commonly used heat exchanger design for this application is a crossflow fin-and-tube heat exchanger. When exchanging heat with air, the main resistance …