What is a refrigerated space?

REFRIGERATED SPACE is a space constructed for storage or handling of products, where mechanical refrigeration is used to maintain the space temperature at 55° F or less.

What is refrigerator in thermodynamics?

According to the Second Law of Thermodynamics, heat will always flow spontaneously from hot to cold, and never the other way around. A refrigerator causes heat to flow from cold to hot by inputting work, which cools the space inside the refrigerator.

Which thermodynamics process is present in refrigerator?

The convection is the most present process in the refrigeration equipment you may deal with. It occurs mainly in the fluids (Liquids and Gas). It is the result of a fluid circulation, which can happen either naturally, due to differences on the temperature of the fluid, or forced way.

What do you mean by refrigeration effect?

Refrigerating Effect. This is the heat absorbed in the evaporator per lb of refrigerant. It is determined by the difference in enthalpy of a lb or refrigerant vapor leaving the evaporator and that of a lb of liquid just upstream (ahead) of the expansion valve at the evaporator.

What is a refrigerator in physics?

A refrigerator is a heat engine in which work is done on a refrigerant substance in order to collect energy from a cold region and exhaust it in a higher temperature region, thereby further cooling the cold region.

What is refrigerator in physics class 11?

A refrigerator works on the principle of the second law of thermodynamics. This law is related to the extraction of heat from a body i.e. to lower the temperature of the body. Hence, a refrigerator is a device which works on the principle that evaporation of a liquid gives a cooling effect.

What is refrigeration cooling cycle?

The refrigeration cycle starts and ends with the compressor. The refrigerant flows into the Compressor where it is compressed and pressurised. At this point, the refrigerant is a hot gas. As the gas cools down the load, it absorbs the heat which turns it into a gas. …

What is refrigeration and its unit?

The unit of refrigeration is expressed in terms of ton of refrigeration (TR). One ton of refrigeration is defined as the amount of refrigeration effect (heat transfer rate) produced during uniform melting of one ton (1000kg) of ice at 0°C to the water at the 0°C in 24 hours.

How is refrigeration effect measured?

Refrigeration Formulas

1. Compression Work. Compressor work can expressed as.
2. Compression Horsepower. Compression horsepower can be expressed as.
3. Compression horsepower per Ton. p = 4.715 / COP (2c)
4. COP – Coefficient of Performance. COP = NRE / h (3)
5. Net Refrigeration Effect.
6. Capacity.
7. Compressor Displacement.
8. Heat of Compression.

What is refrigerator or heat pump?

Either a refrigerator or a heat pump is an engine running in reverse. For a refrigerator, the focus is on removing heat from a specific area. For a heat pump, the focus is on dumping heat to a specific area.

What is the purpose of refrigerant?

Refrigerant is a compound typically found in either a fluid or gaseous state. It readily absorbs heat from the environment and can provide refrigeration or air conditioning when combined with other components such as compressors and evaporators.

What is the difference between heating and refrigeration?

Heating is the process of upkeeping the heat in the body. Refrigeration is the process of cooling space. Refrigeration involves the process of removing heat from a body and cooling it to a lower temperature than the actual. Refrigerators are used for the refrigeration process.

What are the components of a refrigerator?

There are four components in the refrigerator system. They are: Evaporator: It is the main part of the refrigerator that helps to keep the device and things cool always. It features the tubes with high thermal conductivity that helps in absorbing the heat rejected by the fan or coil in the system.

What is gas-cycle refrigeration?

Gas-cycle refrigeration, is essentially, a reversed Joule cycle (gas turbine cycle). As the name indicates, the refrigerant in these systems is a gas. The system, as shown in Figure 7, is basically the same as that of the vapor-compression cycle.

What is a heat pump refrigerator?

A refrigerator is a device which is designed to remove heat from a space that is at lower temperature than its surroundings. The same device can be used to heat a volume that is at higher temperature than the surroundings. In this case the device is called a Heat Pump.