Question

What was the first refrigerant used in continuous refrigeration system?

1. Ammonia
2. Carbon dioxide
3. Water
4. Air

Answer 1

Correct Answer - Option 3 : Water

Explanation:

Continuous Refrigeration System:

• A continuous refrigeration system is the refrigeration system in which we get an uninterrupted form of cooling by absorbing the heat from a closed system (evaporator, T₁) and then rejecting it outside (condenser, T₂), where T₂ > T₁. This process happens in the cycle and provides a continuous form of cooling.
• Compared to natural refrigeration methods, artificial refrigeration methods are Continuous, Reliable and can work under almost all conditions.

 

​First Artificial Refrigerator:

• The history of artificial refrigeration began in the year 1755 when Scottish professor William Cullen made the first refrigerating machine, which could produce a small quantity of ice in the laboratory. 
• The basis of modern refrigeration is the ability of liquids to absorb enormous quantities of heat as they boil and evaporate.
• Professor William Cullen of the University of Edinburgh demonstrated this in 1755 by placing some water in thermal contact with ether under a receiver of a vacuum pump.
• This process of cooling is made continuous by recycling the vapours by condensation to the liquid state. The condensation process requires heat rejection to the surroundings. It can be condensed at atmospheric temperature by increasing its pressure.