Table of Contents
- 1 Why we Cannot use Carnot cycle?
- 2 What are the limitations of Carnot Vapour cycle?
- 3 What is the main disadvantage of Lamont boiler?
- 4 Which cycle is used for steam power plant?
- 5 Why is the Carnot cycle an idealization of the heat engine cycle?
- 6 Why is a constant pressure process used in the Rankine cycle?
Why we Cannot use Carnot cycle?
The Carnot cycle can be thought of as the most efficient heat engine cycle allowed by physical laws. It is not a practical engine cycle because the heat transfer into the engine in the isothermal process is too slow to be of practical value.
What are the limitations of Carnot Vapour cycle?
Limitations Of Carnot Cycle: The Carnot Cycle is used to study the heat engine and not extend to other types of devices. In the practical engine, the heat loss will be possible wherein the Carnot Cycle it is not mentioned which results in the maximum efficiency (which is not possible).
What will be the Rankine cycle efficiency of a good steam power plant?
In a good steam power plant, the Rankine cycle efficiency varies from 35 to 45 \%.
What are the advantages and disadvantages of steam power plant?
Power Generation/Steam Power
| Advantages | Disadvantages |
|---|---|
| Cheap coal is used | Air pollution from smoke fumes |
| Can be installed anywhere near fuel & water supply | Costs more to run compared with other types of power stations |
| Requires less construction space | |
| Cost for Generation is less |
What is the main disadvantage of Lamont boiler?
Explanation: The main disadvantage of Lamont boiler is the formation of bubbles. These bubbles come in contact with the inner surface of the heating tubes and subsequently are attached to it.
Which cycle is used for steam power plant?
steam Rankine cycle
The steam Rankine cycle is one of the highest utilized types of thermodynamic cycles for electricity production in the world [1]. The steam power stations run on Rankine cycles using steam as a working fluid. The simple ideal Rankine cycle is in fact the most basic vapor power cycle.
Why is the Carnot cycle not used in power plants?
There are three reasons for the carnot cycle not being used in power plants: Firstly, carnot cycle involves transition from an isothermal process to an adiabatic process. The heat exchange in carnot cycle is isothermal which needs the working fluid to either phase change or the process be extremely slow.
Which is the best cycle for steam power plant?
However ideal cycle for steam power plant is Rankine cycle. Carnot Vapour cycle is not suitable for steam power plant because in Carnot Vapour cycle at the end of condensation process we get a two phase mixture and next is the compression process where it is impossible to compress a mixture in two phase.
Why is the Carnot cycle an idealization of the heat engine cycle?
In order to approach the Carnot efficiency, the processes involved in the heat engine cycle must be reversible and involve no change in entropy. This means that the Carnot cycle is an idealization, since no real engine processes are reversible and all real physical processes involve some increase in entropy.
Why is a constant pressure process used in the Rankine cycle?
The heat exchange in carnot cycle is isothermal which needs the working fluid to either phase change or the process be extremely slow. Thus constant pressure process is used in rankine cycle. In rankine cycle,the pumping losses are less because the pumping starts at saturated water condition which is eqsy to pump.