Table of Contents
- 1 What are the differences between actual and ideal cycle?
- 2 What do you mean by actual cycle?
- 3 What is difference between Rankine and actual Rankine Cycle?
- 4 What is the difference between the ideal cycle and actual cycle of a reciprocating engine?
- 5 What is the other name of Diesel cycle?
- 6 What is the difference between the real and theoretical Diesel cycle?
- 7 What are the peculiarities of the diesel engine?
What are the differences between actual and ideal cycle?
Difference: Net Area of the actual cycle is lesser than the Ideal cycle Net Area because the Work done during the expansion and compression process is not Isentropic. There are some losses in the form of energy loss. Therefore the Net Work out of the system for an Actual cycle is lesser than the Ideal cycle.
What is the main difference between Otto and Diesel cycle?
Otto cycle is used for petrol or spark ignition engine while diesel cycle is used for diesel or compression ignition engine. The main difference between Otto cycle and Diesel cycle is that in Otto cycle heat addition takes place at constant volume and in diesel cycle heat addition takes places at constant pressure.
What do you mean by actual cycle?
What is the Actual cycle? The Actual cycle in the Thermodynamics is a cycle of operations experienced by the actual Internal combustion engine where the efficiency of this actual Internal combustion engine is much lower than the Ideal cycle or Air-Standard cycle due to various losses in the processes.
Why actual cycle does differ from fuel air cycle?
The main difference between air-standard cycles (theoretical cycles) and fuel-air cycles is in the process of heat addition to the cycle. During the compression process in actual engines, heat exchange between the cylinder gases and the surroundings is continuously changing with time, both in magnitude and direction.
What is difference between Rankine and actual Rankine Cycle?
Thus the efficiency of the actual Rankine cycle is far lower than the ideal Rankine cycle efficiency….Difference Between Ideal and Actual Rankine Cycle.
| Rankine Cycle Representation is as follows on P-v and T-s diagrams: | |
|---|---|
| Ideal Rankine Cycle | 1-2′-b-3′-4′-1 |
| Actual Rankine Cycle | 1-2-b-3-4-1 |
Which is better Otto or Diesel?
The Otto cycle has less compression ratio (7:1 to 10:1) but in diesel cycle the compression ratio is high (11:1 to 22:1). In Otto cycle as well as in diesel cycle heat rejection takes place at constant volume. The efficiency of Otto cycle is less as compared with the Diesel cycle.
What is the difference between the ideal cycle and actual cycle of a reciprocating engine?
The largest difference between the two diagrams is the simplification of the intake and exhaust strokes in the ideal cycle. In the exhaust stroke, heat Qout is ejected into the environment. In a real engine, the gas leaves the engine and is replaced by a new mixture of air and fuel.
What is actual cycle efficiency?
The actual cycle experienced by internal combustion engines is an open cycle with changing composition, actual cycle efficiency is much lower than the air standard efficiency due to various losses occurring in the actual engine. Whereas, in actual cycle, burning is completed in a definite interval of time.
What is the other name of Diesel cycle?
constant pressure cycle
Explanation: Diesel cycle is also known as constant pressure cycle as pressure is constant in this cycle.
What is the difference between actual cycle and air standard cycle?
In air standard cycles the heat addition is assumed to be an instantaneous process whereas in an actual cycle it is over a definite period of time. The time required for the combustion is such that under all circumstances some change in volume takes place while it is in progress.
What is the difference between the real and theoretical Diesel cycle?
Between real and theoretical diesel cycles there are differences and similarities in the form and in the values of pressures and temperatures. Differences that also appear in the Otto cycle.
What is the difference between the Otto cycle and Diesel cycle?
In compression ignition diesel engines there is no throttle valve, characteristic of spark ignition engines, equipped with a carburetor. Therefore, the negative surface of the real diesel cycle is smaller than that of the Otto cycle. The points analyzed above correspond to the four-stroke engine.
What are the peculiarities of the diesel engine?
Finally, one is peculiar to the diesel engine, namely; the one concerning that the combustion is not verified at constant pressure in the case of the real cycle. The differences between the actual and theoretical cycle of a diesel, compression ignition engine are slightly different from those of a two-stroke engine.
What is the difference between a two-stroke and a diesel engine?
The differences between the actual and theoretical cycle of a diesel, compression ignition engine are slightly different from those of a two-stroke engine. We first analyze the differences in the four-cycle cycles.