Question

Present your example of selected Cycle and the supported law of thermodynamics

- Identify the concepts of the problem

Present your example of selected Cycle and the supported law of thermodynamics

- Identify the concepts of the problem

can you write it by computer

Answer 1

Clausius Statement of the Second Law of thermodynamics:

“It is impossible to construct a device that operates in a cycle and produces no effect other than the transfer of heat from a lower-temperature body to a higher-temperature body”.

Vapor compression cycle:

The vapor compression cycle performs the process in accordance with the second law of thermodynamics by producing refrigerating effect using the work input.

The ideal cycle for refrigeration is vapor compression cycle. The cycle consists of an isentropic compression processes, two constant pressure processes heat transfer process and an isenthalpic expansion process.

Refrigeration is a process of removing heat from a low-temperature reservoir and transferring it to a high-temperature reservoir.

Process 1- 2: Isentropic compression

Compression takes place to raise the temperature and refrigerant pressure. The refrigerant leaves the compressor and enters to the condenser.

Process 2-3: Constant pressure heat rejection in condenser.

Heat is transferred from the refrigerant to surroundings using heat exchanger.

Process3-4: Constant enthalpy expansion process in throttle valve.

Refrigerant is expanded in throttle valve as isenthalpic process.

Process 4-1: Constant pressure heat addition in evaporator.

Refrigerant evaporates and absorbs latent heat of vaporization from the refrigerated space.

Compressor:

Compressor is a work absorbing open system. The working fluid entered into the compressor is compressed by using fan or motor, which is powered by the electric source.