Automotive Air Conditioning System

AUTOMOTIVE AIR CONDITIONING SYSTEM VIVEK PRASAD 54227 NIKHIL SAHA 54212 RAHUL TIWARI 54265

COMPONENTS IN AUTOMOTIVE AIR CONDITIONING ECU

Heater Control Panel

Air Purifier

Core Evaporator

Radiator

Servo Motor Condenser HVAC

Cooling Fan

Compressor

Blower

Bus A/C System

SCHEMATIC DIAGRAM

P-H CHART 3

2

4

1

Enthalpy kJ/kg

Typical A/C System and Flow

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

Distribution

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

DIAGRAM

BLOCK DIAGRAM

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

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

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

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.

CALCULATIONS

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

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

REFRENCES “Air cooling in automobiles using vortex tube

refrigeration system” by B.Sreenivasa Reddy. “Experimental Analysis of an Automotive air conditioning system with two phase flow measurement” by Shu Jun Wang . “Experimental Investigation on Modified Vortex tube with dual forced vortex flow” by G. Maruthi Prasad Yadav.