We have computed the efficiencies of many cycles and found them to be rather low

Question

We have computed the efficiencies of many cycles and found them to be rather low, usually well below 50%. But suppose that these engines were built very carefully, with excellent thermal insulation so that no heat could escape, and with high tech frictionless materials, so that the water flow was free of any turbulence losses. Would this increase the efficiencies we have computed? In other words, is the fact that these efficiencies are a lot less than 100% due to things that can be fixed through technological advances, or is it due to a deeper problem?

Explanation / Answer

is a deeper problem, the efficiency of a cycle depends largely on the process temperature and the ambient temperature. Increase working efficiency is achieved with higher temperatures in the process. The frictional losses are very small in comparison and isolate the engine is not an option

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