https://github.com/ashwinvis/project_btech

Automobile Air Conditioning harnessing Shock Absorber action
https://github.com/ashwinvis/project_btech

air-conditioning machine-design refrigeration

Last synced: 6 months ago
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Automobile Air Conditioning harnessing Shock Absorber action

• Host: GitHub
• URL: https://github.com/ashwinvis/project_btech
• Owner: ashwinvis
• License: other
• Created: 2018-03-18T15:26:39.000Z (almost 8 years ago)
• Default Branch: master
• Last Pushed: 2018-03-19T10:03:38.000Z (almost 8 years ago)
• Last Synced: 2025-06-28T22:57:12.394Z (7 months ago)
• Topics: air-conditioning, machine-design, refrigeration
• Language: C++
• Homepage:
• Size: 896 KB
• Stars: 1
• Watchers: 1
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.md

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README

          
# Automobile Air Conditioning harnessing Shock Absorber action

[![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.1202377.svg)](https://doi.org/10.5281/zenodo.1202377)

ARUN V T

ASHWIN VISHNU M

GOKULDAS NANDAKUMAR

SAJU V J

GUIDE: DR. N. ASHOK KUMAR

## Abstract

The conventional vapour compression AC system in automobiles relies on engine

output for compressor work.  The energy associated with shock absorber action,

is lost as viscous dissipation in conventional systems. By replacing this shock

absorber to act as a reciprocating air compressor, to drive an air conditioning

system, we can avoid the dependence on engine power.  Based on theoretical

calculations on Reversed Brayton cycle, it has been found that, it is possible

to achieve a cooling capacity of 1 Ton of Refrigeration, with a COP of 2.71.

For this we require the modified shock absorber to generate an air pressure of

3 bar after compression.

A Maruti 800 rear shock absorber is modified to act as a reciprocating air

compressor. This is done by replacing the damping components within the shock

absorber cylinder, with a piston head. An inlet and a delivery port are drilled

into the cylinder.  The shock absorber is firmly mounted on a frame. It is then

driven using a cam powered by an electric motor.  The compressed air is stored

in a reservoir at a pressure of 3 bar and temperature higher than ambient

condition.  Then, the air is passed into heat exchanger to reject heat to

ambient air, isobarically.  To achieve the drop in temperature, the high

pressure air is expanded using a cooling turbine, isentropically. Air pressure

drops to atmospheric pressure, and the temperature is below ambient condition.

The refrigerating capacity of the cooled air per unit mass, and COP of the

system has to be evaluated experimentally.