What is Carnot Cycle

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The major problem in achieving lower temperatures is the requirement of a very long exhaust stroke and very slow rate of heat transfer. Since the heat engines are required to work at high speeds, to obtain larger power, the exhaust temperature must be kept high. With these limitations, another way to improve the efficiency is to increase the upper temperature. Most IC engines go up to 2300°C However, there are limits to it due to limited strength of the material at higher temperatures.

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