Search This Blog

Thursday, 14 May 2020

 AIR CONDITIONER:-

In the present scenario, where the temperature is increasing all over the world, air conditioners are surely getting much more applicability. An air conditioner has different types of parts, which together make the room atmosphere cool and comfortable. In this article, we will discuss about a particular component of an air conditioner, the compressor. How a compressor contributes to the whole process of air conditioning, what are the different types of compressors and what type of compressors you should choose for your air conditioner will be some of the major topics of our discussion.

Table of Contents

General information about compressor
Different types of compressors in air conditioners:
Which should we choose?
General information about compressor
Air conditioners usually have three components, which play an important role in the entire process of air conditioning: compressor, condenser, and evaporator. Air passes through all these components and comes out cool and comfortable. In all of these components, the compressor compresses the refrigerant into a high-pressure fluid, the refrigerant which is a high-temperature fluid when it passes through the compressor that brings out the heat from it, and it is then absorbed. -Passes the pass. This high-pressure fluid, finally through the room evaporator process, passes through an expansion valve, which transforms the gas into a cold liquid and produces a cool and comfortable atmosphere in the room.


It is now clear that a compressor plays a major role in the entire air conditioning system. How a high-temperature fluid (refrigerant gas) is converted into a high-pressure fluid is determined by the compressor itself. Different types of compressors are available in the market. What are those, let's find them out?


Different types of compressors in air conditioners:
Nowadays the following two types of compressors are quite popular in the market.
1. Reciprocating (piston) air compressor: These compressors have a mixed system of cylinder and piston. It is similar to the engine of a vehicle. The piston creates a pressurized area of ​​the gas, which moves back and forth and then releases it (please see the picture below).


httpnuclearpowertraining.tpub.comh1018v2cssh1018v2_85.htm

2. Rotary air compressor: An ideal rotary (cyclic) air compressor, consists of a pair of rotors of a special design, with the pair having very short distances between each other for clearance. These rotors rotate in opposite directions, due to which the air rises under higher pressure than before.

h1018v2_86_1

Apart from this, there are some other types of compressors, 'screw compressors', 'centrifugal compressors', and 'scroll compressors'. However, all these compressors are not as popular compared to the compressors mentioned above.

Which should we choose?
After seeing both compressors, it is only natural for people to raise the question that what type of compressors should we choose while buying air conditioners. To answer this question, we are listing here the pros and cons features of both types of compressors, so that it can help you in making the right decision.

Friday, 1 May 2020

Refrigerator working , principle.

REFRIGERATOR:
The low temperature of the fridge makes the reproduction rate of bacteria work. Due to which the food items deteriorate less.

The refrigerator keeps the temperature slightly higher than the freezing point.

A temperature of 3 to 5 ° C is required to store food.

Information about freeze:
The device which maintains a temperature below freezing point is called freezer. More levels run on the refrigerator vapor-compression refrigeration system.

Domestic refrigerators come in many types of size range. The smallest of which is 4 liters. And comes with a capacity of up to 600 liters or more.

When buying Fridge, it is seen how much capacity it has in liters. The more liters you can store the more food.

In a modern fridge, you can keep your food fresh for long days and due to this, food can be stored in bulk and can be used later.

Because buying food in bulk saves money.

History of refrigerator:
When the refrigerator was not even invented, ice houses were used.

Artificial refrigeration began when Scottish professor William Cullen built a small refrigerating machine in 1755.

He created a vacuum in a container of (Cullen) Diethyl ether with a pump and boil it and absorb heat from the air surrounding it.

With the help of this experiment, he was able to produce small amounts of ice. But at that time there was no practical use of it.

Who invented refrigerator in Hindi
In 1805, American inventor Oliver Evans described the closed vapour-compression refrigeration cycle for ice production.

In 1820, British scientist Michael Faraday liquefied ammonia and other gas with high pressures and low temperatures.

In 1834, Jacob Perkins built the first vapor-compression refrigeration system to run a refrigerator.

This device could run continuously.

In 1842, American physician, John Gorrie created the working prototype but proved to be a failure in the market.

The first commercial ice-making machine was invented in 1854.

How does the refrigerator work.refrigerator working, information about freeze.com
Before understanding how this works, you have to understand the refrigeration cycle.

Currently every refrigerator uses a vapour-compression refrigeration system (VCRS).

It uses refrigerant. And it is used in the air conditioning of buildings and automobiles.

Vapor-compression refrigeration cycle
Liquid refrigerant is circulated as a medium. Which absorbs the heat from the space to be cooled and leaves the heat elsewhere.

VCRS has 4 main components.

compressor
condenser
thermal expansion valve
evaporator