What is Carnot refrigeration cycle?
Carnot cycle is a totally reversible cycle which consists of two reversible isothermal processes and two isentropic processes. Since it is a reversible cycle, all four processes can be reversed. This will reverse the direction of heat and work interactions, therefore producing a refrigeration cycle.
How Vapour absorption refrigeration system works?
In a Vapour compression system, the compressor sucks the refrigerant from the evaporator and compresses it under high pressure. Thus the absorber and generator replace the compressor in the vapor absorption cycle. The absorber enables the refrigerant to flow by absorbing from the absorber to the generator.
What is the Carnot cycle used for?
Carnot cycle, in heat engines, ideal cyclical sequence of changes of pressures and temperatures of a fluid, such as a gas used in an engine, conceived early in the 19th century by the French engineer Sadi Carnot. It is used as a standard of performance of all heat engines operating between a high and a low temperature.
What is absorption refrigeration cycle?
Absorption refrigeration is an established technology that uses low-quality heat (e.g., hot water or low-pressure exhaust gas) rather than electric power to drive the cooling cycle.
What is the refrigerant used in Vapour absorption cycle?
In the vapor absorption system the refrigerant used is ammonia, water or lithium bromide. The refrigerant gets condensed in the condenser and it gets evaporated in the evaporator.
What are the new terms in the refrigeration cycle?
In this final diagram of the refrigeration cycle we have introduced 3 new terms: Superheated, Saturated & subcooled. SUPERHEAT – Is an amount of heat added to refrigerant vapour beyond its boiling point. This ensures the refrigerant is in a gas state with no liquid present.
How does the reversed Carnot cycle reverse the refrigeration cycle?
Reversed Carnot Cycle. This will reverse the direction of heat and work interactions, therefore producing a refrigeration cycle. The cycle consists of 1-2: Isothermal heat transfer from cold medium to refrigerant (Evaporator) 2-3: Isentropic (Reversible adiabatic) compression 3-4: Isothermal heat rejection (condenser)
How does refrigerant get cooled back to a liquid state?
Like in hotter regions the outside air temperatures can go up to 42°C – 48 °C with this hot outside air, the refrigerant gets cooled back from vapor to the liquid state. This is possible due to the refrigerant property which is the “critical temperature of a refrigerant”.
What makes a refrigerant different from an ideal cycle?
Most of the differences between the ideal and the actual cycles are because of the irreversibilities in various components which are: 1-In practice, the refrigerant enters the compressor at state 1, slightly superheated vapor, instead of saturated vapor in the ideal cycle.