# Refrigeration and Air-Conditioning : Full Subject Revision Quiz, Formula Notes

By Akhil Gupta|Updated : August 31st, 2021

You have just completed the syllabus of the subject for the Refrigeration and Air-Conditioning Mechanical Engineering Branch. Here you will find all the IMPORTANT FORMULAS of Refrigeration and Air-Conditioning subject. Formulas of the first chapter have displayed for your illustration

CHAPTER-1 INTRODUCTION

• Refrigeration is the process of maintaining space at a lower temperature than that of the surrounding.
• The heat pump works in the same principle as that of a refrigerator. In the case of Heat Pump, our objective is to maintain a space at a temperature higher than the surrounding.

You have just completed the syllabus of the Refrigeration and Air-Conditioning subject for the Mechanical Engineering Branch. Here you will find all the IMPORTANT FORMULAS Of Refrigeration and Air-Conditioning subject. Formulas of the first chapter have displayed for your illustration

## CLICK HERE FOR PDF OF ALL IMPORTANT FORMULAS TO REMEMBER FOR Refrigeration and Air-Conditioning

CHAPTER-1 INTRODUCTION

• Refrigeration is the process of maintaining space at a lower temperature than that of the surrounding.
• The heat pump works in the same principle as that of the refrigerator. In the case of Heat Pump, our objective is to maintain a space at a temperature higher than the surrounding.
• The refrigeration effect is the amount of heat that has to be removed from the space to maintain it at a temperature lower than the surrounding per kg of refrigerant. Its unit is kJ/kg
• Refrigerating capacity is the product of refrigeration effect on the mass flow rate of refrigerant. Its unit is kW.
• Unit of Refrigeration (Tons of refrigeration)

It is defined as the amount of heat which is required to extract from 1 ton of water at 0°C in order to convert it into ice at 0°C in a day or 24 hours.

= 210kJ/min = 50kcal/min = 4.71 HP (1 horse power = 746W = 0.746kW)

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