Why adiabatic process is required in heat engine?

[avistein]

what is the need of adibatic process in heat engine? We can work only with isothermal process .Please expalin this.

 

[Simon Bridge]

You don't need an adiabatic process in a heat engine.
You only need a cycle.

 

[dauto]

You need a closed cycle with net work production. You won't get that with an all isothermic process.

 

[Sunfire]

what is the need of adibatic process in heat engine?

Practically, the adiabatic condition forbids the flow of energy from the engine into the surroundings. Quite often this simplifies the mathematical description of the system. But probably most importantly, serves to isolate the system from its environment and then the energy in it could be more efficiently used to do work, etc. In the case of cooling, the adiabatic condition will serve to thermally isolate the cold parts of the system from the warm surroundings.

 

[sardar]

Adiabatic processes are necessary in heat engines because they allow for the efficient conversion of heat energy into mechanical work. In a heat engine, the working fluid (such as steam or gas) is subjected to a series of processes that result in a net output of work. One of these processes is the adiabatic process, which involves the transfer of energy solely through work and not heat.

The need for an adiabatic process in a heat engine comes from the second law of thermodynamics, which states that heat will naturally flow from a hotter object to a cooler one. This means that in order to convert heat energy into work, the working fluid must be kept at a high temperature while it does work. This is where the adiabatic process comes in, as it allows for the compression and expansion of the working fluid without any heat transfer. This keeps the temperature of the working fluid high, allowing for the efficient conversion of heat energy into work.

It is important to note that while adiabatic processes are necessary in heat engines, they are not the only type of process that can be used. Isothermal processes, which involve the transfer of heat while maintaining a constant temperature, can also be used in heat engines. However, adiabatic processes are often preferred because they result in a higher efficiency and therefore a greater output of work.

In summary, the adiabatic process is necessary in heat engines because it allows for the efficient conversion of heat energy into work by keeping the working fluid at a high temperature. While isothermal processes can also be used, adiabatic processes are typically preferred due to their higher efficiency.