Automotive Air Conditioning System

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AUTOMOTIVE AIR

CONDITIONING

SYSTEM

VIVEK PRASAD 54227

NIKHIL SAHA 54212

RAHUL TIWARI 54265

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Cooling Fan Condenser

COMPONENTS IN AUTOMOTIVE AIR CONDITIONING Heater Core Evaporator Blower Compressor Servo Motor Control Panel ECU Radiator HVAC

Bus A/C System

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P-H CHART

4 ₁

2 3

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Typical A/C System and

Flow

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OBJECTIVE



_{Goal: Study and Experimental analysis of}

Air-distribution in automobiles.



_{The Challenge:}

_{The system must be capable of}

keeping a temperature of 22˚C inside a stationary

black vehicle with four occupants, with an

outside temperature of 40˚C. Also, the system must be an efficient heating system, keeping an internal temperature of 15˚C with an outside temperature of 0˚C.



Objectives:



_{1. Duct design}



_{2. Uniform Temperature and Velocity}

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ABSTRACT



_{With the development of vehicle industry and}

the improvement of life quality, many

factories and scholars are more focused on

heating facility and air quality of the

Passenger car. In this project we are going to

analyze effect pattern of inlet parameters for

temperature field and velocity field for the

Passenger car indoor air distribution .In this

project we are going to provide theoretical

basis for improvements of indoor thermal

environment and heating comfort .It is also

going to serve as guidance for the optimal

design about vehicle air conditioning and

distribution.

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WORKING

_{When high-pressure air is tangentially injected}

into the vortex chamber via the inlet nozzle, a

swirling flow is created inside the vortex chamber. In the vortex chamber, part of the gas exists via the cold exhaust directly, and another part called as free vortex swirls to the hot end, where it

reverses by the control valve creating a forced vortex moving from the hot end to the cold end..

_{To run the system some power from the vehicle}

engine shaft is diverted by a pulley arrangement to run an air compressor. The high pressure

created in the air compressor is used as inlet to a vortex tube which is placed inside the vehicle

cabin. The cold air from the vortex tube is used to cool the vehicle cabin and the hot air is exhausted to atmosphere.

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EXPERIMENTAL SETUP

_{Air inlet pipe with air filter}

_{Single cylinder, single h.p Reciprocating}

Air-Compressor.

_{Vortex tube assembly.}

_{Rectangular acrylic model} _filter

_{Air receiver tank ( 40 lts) with safety valve and}

pressure gauge

_{Air delivery pipe} _{Air hoses}

 Compressor seating plate. _{Probe Thermometer}

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ADVANTAGES

 _{The system overcomes the major problems such as global warming}

and ozone depletion.

 _{In Vortex Tube System air is being used in place of refrigerant is of}

having zero ozone depletion, zero global warming potential, non pollutant, non toxic, inflammable, cheaper and eco friendly to the environment.

 _{Cooling conditions met by the Vortex System is healthier than the}

comfort conditions met by the VCRS system, because air is free from chemicals but refrigerant is a gas which is a chemical

mixture.

 _{Energy consumption per ton of refrigeration in System is 4 h.p,}

whereas energy consumption per ton of refrigeration to run VCR System in vehicle is 6 h.p. So Vortex System is economical.

 _{Vortex Tube System is of having no moving parts, so its durability}

is more. Installing and maintaining is easier than the current air conditioning system.

 _{Performance of the Cooling system is good at high speeds of the}

vehicle as high pressures are created in the Air compressor.

Cooling system works well in the vehicles with less cabin space as the C.O.P of the vortex tube is less.

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DISADVANTAGES



_{Vortex Tube System is giving cooling}

conditions but not humidity conditions inside

the vehicle cabin.



_{WAYS TO OVERCOME:}



For getting comfort conditions in the vehicle

both cooling as well as humidity conditions

are to be maintained.



_{By installing humidifier along with the Vortex}

Tube System, the required comfort conditions

i.e. temperature & humidity will be maintained

in the vehicle cabin.

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SR.NO Air velocity(m/s) Discharge(m3_/min0.47) 1 0.47 0.015 2 0.24 0.010 3 2.90 0.083 4 1.04 0.034 5 1.98 0.058 6 0.60 0.012 7 0.13 0.003 8 0.05 0.001 9 0.70 0.030

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CONCLUSION

_{The foremost outcome in this stage of the project}

is that the duct required for cooling in the cabinet is of approximately 1’ inch. The project is focused on modeling and evaluating, optimum air velocity required for maximum human comfort. Analysis of air conditioning system using system approach

was achieved in this stage of the project. Two

different methodologies are presented to achieve the objectives of this work. First approach consists of air flow through the air-conditioning unit in the RAC lab in order to achieve the objective of

evaluation and optimum selection of air

conditioning system from different alternatives. The second approach focuses on the cooling

provided by Vortex tube which will be studied in the next stage of this project.