This document provides information from a lecture on the working of a window air conditioner. It discusses that air conditioners remove heat and humidity from indoor air and place it outside to cool down homes on hot summer days. It then shows a line diagram and explains the working process - the refrigerant gas is compressed, condenses while losing heat outdoors, expands through a valve and absorbs indoor heat in the cooling coils before repeating the cycle. The indoor air is cooled and dehumidified in this process.

1. KALI CHARAN NIGAM INSTITUTE OF
TECHNOLOGY, BANDA
LECTURE
ON
INTRODUCTION TO AIR CONDITIONING
[TOPIC- WORKING OF WINDOW AIR CONDITONER]
FUNDAMENTAL OF MECHANICAL ENGINEERING (BME101)
(I SEMESTER)
BY : DEEPAK KUMAR YADAV
ME DEPARTMENT

2. How it works?
• When it’s a hot summer day outside. Air
conditioners remove heat and humidity from the
air inside and place it outside to ultimately cool
down your home.

3. WINDOW AIR CONDITIONER
Source : https://commons.wikimedia.org/wiki/File:Air_conditioning_unit-
en.svg

4. LINE DIAGRAM OF WINDOW AIR
CONDITIONER
Line diagram of air conditioner

5. WORKING OF WINDOW AIR
CONDITIONER
The coils and pipes in an air conditioning unit
contain refrigerant gas. The refrigerant gas enters
the compressor as warm, low-pressure gas and
leaves it as hot, high-pressure gas.
In the condenser coils, hot, compressed refrigerant
gas loses heat to the outdoor air and becomes
liquid while it is still warm.
The warm, liquid refrigerant passes through the tiny
opening of the expansion valve, expands, and partly
turns to gas at a low temperature.

6. WORKING OF WINDOW AIR
CONDITIONER
In the cooling coils, the refrigerant takes up heat
from the indoor air and leaves the coils as warm,
low-pressure gas.
The indoor air gives up heat to the refrigerant in the
cooling coils and also loses moisture as it is chilled.
The moisture condenses on the coils and trickles
down to outside drain holes. Cooled air is blown
back into the room.

7. THANK YOU