An ideal air refrigeration system is assumed to work on reversed Carnot cycle.
Difference between Refrigerator and Heat Pump
The differences between a refrigerator and a heat pump are as follows,
What is Bell Coleman Cycle? Process, Derivation, Diagram & COP
The ideal reversed Carnot cycle is modified to obtain Bell Coleman cycle. This is done to improve the COP of reversed Carnot cycle either by reducing the temperature of hot body or increasing the temperature of cold body. The figure 1 shows the components of Bell Coleman cycle.
Figure 1: Bell Coleman Cycle.
What is a Carnot Engine? Derivation, Diagram & Efficiency
Carnot engine cycle is a theoretical engine cycle it doesn’t have any practical applications. But it helps in determining the theoretical efficiency of practical engines while designing.
What is Reheat Cycle? Process, Derivation, Diagram & Efficiency
The efficiency of Rankine cycle can also be increased by reheating the steam. In reheat cycle, the steam in the turbine is expanded in number of stages. After partial expansion of steam in high pressure turbine, it is reheated to the initial temperature at constant pressure in reheated. This reheated steam is further expanded in low pressure turbines. The process of reheating is shown in figure (1).
Figure 1: Reheat Cycle.
What is Dual Cycle? Process, Derivation, Diagram & Efficiency
Dual combustion cycle is a combination of constant pressure and constant volume cycle where, heat is added partly at constant volume and remaining at constant pressure. This cycle is also called mixed cycle or limited pressure cycle. This cycle is represented on P-V and T-s diagram as given below,
Figure 1: Dual Cycle.
What is Diesel Cycle? Process, Derivation, Diagram & Efficiency
Diesel cycle cycle is also known as constant pressure heat addition cycle as heat is added to the cycle at constant pressure. This cycle consists of four processes.
1. Isentropic compression process
2. Constant pressure heat addition process
3. Isentropic expansion process
4. Constant volume heat rejection process.
The representation of diesel cycle on P-V and T-s diagram is shown in below figure 1,
Figure 1: Diesel Cycle.
What is Otto Cycle? Process, Derivation, Diagram & Efficiency
Otto cycle is the ideal cycle for petrol and gas engines. It is also known as constant volume air cycle. This cycle consists of four processes. They are,
- Reversible adiabatic compression
- Constant volume heat addition process
- Reversible adiabatic expansion
- Constant volume heat rejection process.
The P-V and T-s diagrams of the cycle (see Figure 1),
Figure 1: Otto Cycle.
What is Positive Displacement Compressor? Working, Diagram & Parts
Compressors in which, air is trapped in a reduced space for compression by two sets of engaging surfaces is known as positive displacement compressors.
What is Centrifugal Air Compressor? Working, Diagram & Parts
Figure 1: Centrifugal Air Compressor.
A Centrifugal Air Compressor consists of a rotor (or impeller) to which a number of curved vanes are fined symmetrically. The rotor rotates in an air tight casing with inlet and outlet points.