Which cycle is also known as constant pressure cycle?
Table of Contents
- 1 Which cycle is also known as constant pressure cycle?
- 2 What is constant in Otto cycle?
- 3 Is Diesel cycle a constant pressure cycle?
- 4 What is the air standard cycle?
- 5 Is volume constant in Otto cycle?
- 6 How constant pressure heat addition process occurs in gas power cycle?
- 7 Which of the following is the air standard cycle?
- 8 What is the air standard cycle for a gas turbine called *?
- 9 What are the characteristics of an air standard cycle?
- 10 What are the different types of heat engine cycles?
Which cycle is also known as constant pressure cycle?
Explanation: Otto cycle: The air-standard-Otto cycle is the idealized cycle for the spark-ignition internal combustion engines. Otto cycle is the one which has two constant volume heat transfer processes and two adiabatic work transfer processes.
What is constant in Otto cycle?
Explanation:
| Otto Cycle | Constant volume heat rejection. Constant volume heat addition. |
|---|---|
| Diesel Cycle | Constant pressure heat addition. Constant volume heat rejection. |
| Dual Cycle | Constant volume and constant pressure heat addition Constant volume heat rejection |
Is Diesel cycle a constant pressure cycle?
All diesel engine works on this cycle. Diesel is used as fuel in this cycle as it can be compressed at higher compression ratio. It is also known as constant pressure cycle because heat is added in it at constant pressure. It has high thermal efficiency and compression ratio (11:1 to 22:1) as compared with Otto cycle.
Which of the following is constant during the heat addition process of the air standard cycle?
The working fluid is air which behaves as an ideal gas. All the processes are internally reversible. Specific heat of air remains constant during the cycle. The combustion process is replaced by the heat addition process.
What is Otto and Diesel cycle?
Both these cycle are air standard cycles of automobile engines. Otto cycle is used for petrol or spark ignition engine while diesel cycle is used for diesel or compression ignition engine….Diesel cycle vs Otto Cycle:
| S.No. | Otto Cycle | Diesel Cycle |
|---|---|---|
| 1. | Otto cycle is given by the Nicolas Otto in 1876. | It was given by Dr. Rudolph Diesel in 1897. |
What is the air standard cycle?
Air standard cycle is defined as a reversible heat engine in which the source of heat supply and the sink for heat rejection are external to the air. This cycle is a good approximation for many so-called internal combustion cycles.
Is volume constant in Otto cycle?
The Otto cycle consists of isentropic compression, heat addition at constant volume, isentropic expansion, and rejection of heat at constant volume.
How constant pressure heat addition process occurs in gas power cycle?
In a simple gas turbine engine arrangement, air is drawn into a compressor, where a pressure increase occurs. The Brayton cycle models this cycle by the following processes: 1–2, isentropic compression; 2–3, constant-pressure heat addition; 3–4, isentropic expansion; and 4–1, constant-pressure heat rejection.
What is constant in diesel cycle?
The idealized Diesel cycle assumes an ideal gas and ignores combustion chemistry, exhaust- and recharge procedures and simply follows four distinct processes: 1→2 : isentropic compression of the fluid (blue) 2→3 : reversible constant pressure heating (red) 3→4 : isentropic expansion (yellow)
Is diesel engine constant pressure?
The Diesel Engine Cycle is called as the Constant Pressure Cycle because the heat addition or the combustion takes place at constant pressure. While the Petrol Engines are called as constant volume cycle as combustion takes place at constant volume.
Which of the following is the air standard cycle?
The air-standard cycle is an idealized cycle founded on the following approximations: (1) The working fluid throughout the cycle is only air; (2) the air acts as an ideal gas; (3) combustion processes are replaced by well-defined heat addition processes; and (4) the exhaust process is replaced by a heat rejection …
What is the air standard cycle for a gas turbine called *?
Brayton cycle
What is the air standard cycle for a Gas-Turbine called? Explanation: Brayton cycle is an ideal air standard cycle for a Gas turbine, which, like the Rankine cycle, also comprises of two reversible adiabatic & two reversible isobars.
What are the characteristics of an air standard cycle?
The working medium has constant specific heats throughout the cycle. With all of these assumptions, it is easy to analyse the different processes in the cycle. The performance such as the work output and the peak pressure and the thermal efficiency of these air standard cycle is the maximum. There are different air standard cycles available.
How is the Brayton cycle represented on a pressure–volume diagram?
The Brayton cycle is represented on pressure–volume and temperature–entropy diagrams in Fig. 6. For this simple configuration the pressure ratio defined earlier represents the high pressure in the cycle divided by the low pressure in the cycle.
What are the different types of combustion cycles?
There are three air-standard cycles: constant volume ‘combustion’ (Otto), constant pressure ‘combustion’ (Diesel) and dual ‘combustion’ – this is a combination of constant volume and constant pressure combustion, and results in a slightly more realistic cycle.
What are the different types of heat engine cycles?
There are three air-standard cycles: dual ‘combustion’ – this is a combination of constant volume and constant pressure combustion, and results in a slightly more realistic cycle. These are the heat engine equivalent of the reciprocating engine and different from the actual engine cycle because: