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# What is heat engine and refrigerator?

## What is heat engine and refrigerator?

A refrigerator is a reversed heat engine, where heat is pumped from a body at low temperature to a body at high temperature. Any refrigerating system is a heat pump, which extracts heat from a cold body and delivers it to a hot body. A heat engine is a system which converts Thermal energy into Mechanical Energy.

How is heat engine different from refrigerator?

Explain how heat engine is different from refrigerator. Heat engine converts heat energy into mechanical energy. Refrigerator transfers heat from cold body to hot body. An ideal refrigerator can be considered as a Carnot’s ideal heat engine working in the reverse direction.

### What is the principle of heat engine?

The working substance receives heat from a high-temperature source and a part of that heat is transformed into work and the rest amount of heat is respected in the heat sink at low temperature. This is the principle of the heat engine.

How heat engine works step by step?

The gas takes energy from a heat source, expands, cools, and pushes a piston out. As the piston returns into the cylinder, it compresses and heats the gas, so the gas ends the cycle at exactly the same pressure, volume, and temperature it started off with.

#### What is a refrigerator?

A refrigerator is an open system that dispels heat from a closed space to a warmer area, usually a kitchen or another room. By dispelling the heat from this area, it decreases in temperature, allowing food and other items to remain at a cool temperature.

What is refrigerator efficiency?

The efficiency of a refrigerator is based on the energy consumed per year for a given size. The efficiency of a refrigerator is expressed in volume cooled per unit electric energy per day. Volume is measured in cubic feet and electrical energy is measured in kilowatt hours.

## What is heat engine with diagram?

In this system, there will also be some waste in the form of heat. There are different types of a heat engine in which a Carnot engine has the maximum efficiency. A very basic diagram of the heat engine is given below: We know that thermodynamics is the study of the relation between heat and work.

What is refrigerator temperature?

40 degrees Fahrenheit
The ideal refrigerator temperature is 40 degrees Fahrenheit or below, according to the Food and Drug Administration (FDA). These temperatures inhibit the growth of microorganisms like salmonella, E. coli, and listeria, which can cause foodborne illnesses.