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Compressor plays an important role in Automotive Air Conditioning (AC) System. It compresses the low pressure refrigerant and discharges the high pressure refrigerant vapour to condenser. Compressor performance mainly depends on two parameters, compressor oil and refrigerant gas charge quantity. Compressor oil is used to lubricate the movable parts in reciprocating compressors. Compressor oil is miscible in refrigerants in liquid state and amount of oil present in compressor increases the life of compressor. But, huge amount of oil may also reduce the thermal performance of system. Minimum gas quantity gives poor cooling performance and due to maximum quantity, increasing suction/discharge pressures, results in more compressor work and low cooling. This paper discusses the experimental analysis of refrigerant quantity, oil quantity in different ratios to improving the cooling performance of a passenger vehicle. Experimentation was conducted on 7 seater passenger car (hatchback).

Radiator is one of critical component used in automobiles which is used to cool engine under operating conditions. To cool down engine, a coolant is passed through engine block, where it absorbs heat from the engine. The hot coolant is then fed into inlet tank of radiator located either on top of radiator, or along one side from which it is distributed across radiator core through tubes to another tank on opposite end of radiator. As coolant passes through radiator tubes on its way to opposite tank, it transfers much of its heat to tubes which, in turn, transfer heat to fins that are lodged between each row of tubes. The fins then release heat to ambient air. Fins are used to greatly increase contact surface of tubes to air, thus increasing exchange efficiency. The cooled liquid is fed back to engine, and the cycle repeats. Due to the temperature gradient across the radiator, there will be thermal stress on the radiator especially on header joints.

The heating, ventilation and air conditioning system is one of the complex systems installed inside the cabin of an automobile vehicle. Each HVAC discipline has specific design requirements in terms of packaging space, performance targets, etc. Technical specifications such as airflow, noise, air distribution, allowable leakage rate vary as per vehicle segment and interior design accordingly. While maintaining the design parameters of HVAC, design engineers often face challenges related to water leakage, air leakage, water infiltration, etc. Controlling these parameters becomes crucial for customer satisfaction and for safety features. Several studies on seal proof technology have been conducted and continue to be conducted, whether for air-based applications, water-based applications, or any other fluid material.The application of sealing technology is spread almost everywhere, from domestic purposes to industrial applications.

The Heating Ventilating and Air Conditioning (HVAC) module is a single unit designed to provide passenger comfort and safety in any automotive application. In the present competitive environment cost saving and short turn-around time are two major challenges for the development of automotive HVAC modules and systems. However, to make progress in this area, a good understanding of the flow behavior within the module is essential. Computational Fluid Dynamics (CFD) tool reduces the overall development time and ensure an optimum comfort level to passengers in the vehicle. In this paper, attempt has been made to simulate a passenger SUV HVAC module at different modes to examine flow field development and temperature distribution inside the module. All the CFD results have been compared and validated with wind tunnel obtained test results. A three dimensional model with FLUENT solver and GAMBIT, TGrid meshing software has been used throughout the study.