Think about all the different types of heat engines you might encounter in any given day. Think about how they operate and what their limitations might be. Assume that these heat engines operate at the Carnot efficiency. In your initial discussion post, respond to the following:

1)List 10 different types of heat engines.

2)Discuss what limits the efficiency of each.

3)What changes to the device or to the environment would increase the efficiency?

This is the answer.

Step-by-step explanation

10 types of heat engine are the following

1) Otto Cycle

2) Diesel Cycle

3) Rankine Cycle

4) Brayton Cycle

5) Stirling Cycle

6) Ericsson Cycle

7) Mixed /Dual Cycle

8) Atkinson Cycle

9) Kalina Cycle

10) Steam Engine

Each cycle are not so efficient like Carnot Engine because there is an overall theoretical limit to the efficiency of each heat engines due to the temperature called carnot efficiency. Specific types of heat engine have lower limits on efficiency due to the inherent irreversibility of the engine Cycle they use. Again the nonideal behaviour of the real engine such as mechanical friction and losses in the combustion process causes further efficiency loss.

There are also so many reasons for the limiting  of efficiency of the heat engine.

1) inefficient combination

2) heat loss from the combustion chamber

3) imperfect valve timing

4) inefficient compressor and turbines

5) departure of the working fluid from the thermodynamic properties of an ideal gas

6) aerodynamic drag of air moving through the engine

7) friction of moving parts

8) to maintain the cost of the engine for wide use

9) to keep the environment pollution free .

To increase the efficiency of the heat engine we must low down the entropy of the system. Besides when we are working between two different temperatures , if we lower the low temperature again then we can increase the efficiency. Again by using supreme lubricant in the engine we can lower the friction generated in the engine.