What is Carnot refrigerator?
What is Carnot refrigerator?
A refrigerator or a heat pump that operates on the reversed Carnot cycle is called a Carnot refrigerator or a Carnot heat pump. The basic idea behind a household refrigerator is simple: it uses the evaporation of the refrigerant to absorb heat from the cooling space in the refrigerator.
What is the most efficient refrigeration cycle?
Reversed Carnot Cycle Carnot cycle is a totally reversible cycle which consists of two reversible isothermal processes and two isentropic processes. It has the maximum efficiency for a given temperature limit.
What is Carnot cycle efficiency?
The ideal Rankine cycle efficiency (or Carnot cycle efficiency) can be defined as (T2-T1)/T2. T2 is defined as the absolute temperature of the heat source and T1 is the absolute temperature of the heat sink.
Which cycle is used in refrigerator?
vapor-compression refrigeration
The vapor-compression refrigeration is the most widely used cycle for refrigerators, air- conditioners, and heat pumps.
Which refrigeration cycle has highest COP?
Carnot cycle is an theoretical cycle designed to use as an reference cycle it will have maximum COP since all the steps involved during the cycle are reversible so, no losses are involved.
What is gas cycle refrigeration?
Air cycle refrigeration systems belong to the general class of gas cycle refrigeration systems, in which a gas is used as the working fluid. The gas does not undergo any phase change during the cycle, consequently, all the internal heat transfer processes are sensible heat transfer processes.
What is the ideal vapor-compression refrigeration cycle?
The ideal vapor-compression cycle consists of four processes. Ideal Vapor-Compression Refrigeration Cycle Process Description 1-2 Isentropic compression 2-3 Constant pressure heat rejection in the condenser 3-4 Throttling in an expansion valve 4-1 Constant pressure heat addition in the evaporator
What is the relationship between pressure and temperature in refrigeration?
This relationship between PRESSURE & TEMPERATURE is a key factor in the refrigeration cycle process. The changing of state within the refrigerant, from a liquid to a gas, is achieved by manipulating its pressure.
What is the final stage of the refrigeration cycle called?
The final key stage of the refrigeration cycle is the component called the evaporator. This is similar to the condenser in construction, but the refrigerant behaves differently inside. In the evaporator, the refrigerant enters as a cold, low pressure liquid but quickly begins to boil.
What happens to the volume of refrigerant during compression?
During compression, the quantity of fluid remains the same but the volume decreases, this increases the pressure and temperature. The refrigerant leaves the compressor as a superheated (hot) high pressure gas.
