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An aeolipile is massively inefficient and it would have been almost impossible for ancient societies to extract useful work from it. By constantly releasing ste

An aeolipile is massively inefficient and it would have been almost impossible for ancient societies to extract useful work from it. By constantly releasing steam, an enormous amount of energy and matter is released from the engine that could otherwise be recycled. It's like trying to power a car with a rocket engine. The first steam engines that were used for practical work were low powered and very unreliable, but they did close the the steam cycle which allowed them to exploit the liquid -> gas phase transition while keeping (some or) the hot water around to reheat.

thrown_22 5y ago
>An aeolipile is massively inefficient and it would have been almost impossible for ancient societies to extract useful work from it. By constantly releasing steam, an enormous amount of energy and matter is released from the engine that could otherwise be recycled. It's like trying to power a car with a rocket engine. The first steam engines that were used for practical work were low powered and very unreliable, but they did close the the steam cycle which allowed them to exploit the liquid -> gas phase transition while keeping (some or) the hot water around to reheat. The first engines were atmospheric pressure, e.g. they used a vacuum to work. They were not closed cycle and they did not care about wasting water seeing as their purpose was to be a water pump. They didn't care about wasting coal as they worked at a coal mine. For the first century of their development they were stuck in the one niche where both the things they required were free. https://etc.usf.edu/clipart/77500/77524/77524_newcm_stmeng.htm https://etc.usf.edu/clipart/77500/77524/77524_newcm_stmeng.h... An illustration that shows how they removed waste water from the piston. It was a century before high pressure engines were used, which were also open cycle and why steam trains released great plumes of steam when they moved. The Aeolipile is exceedingly easy to reduce the steam outflow by having smaller nozzles. Given that they are basically a solid sphere made with four pipes sticking out they would have been the easiest form of high pressure engine to keep from exploding if there was a demand for mechanical work. They would however still explode, unlike the atmospheric engines.

thrown_22 5y ago

>An aeolipile is massively inefficient and it would have been almost impossible for ancient societies to extract useful work from it. By constantly releasing steam, an enormous amount of energy and matter is released from the engine that could otherwise be recycled. It's like trying to power a car with a rocket engine. The first steam engines that were used for practical work were low powered and very unreliable, but they did close the the steam cycle which allowed them to exploit the liquid -> gas phase transition while keeping (some or) the hot water around to reheat. The first engines were atmospheric pressure, e.g. they used a vacuum to work. They were not closed cycle and they did not care about wasting water seeing as their purpose was to be a water pump. They didn't care about wasting coal as they worked at a coal mine. For the first century of their development they were stuck in the one niche where both the things they required were free. https://etc.usf.edu/clipart/77500/77524/77524_newcm_stmeng.htm https://etc.usf.edu/clipart/77500/77524/77524_newcm_stmeng.h... An illustration that shows how they removed waste water from the piston. It was a century before high pressure engines were used, which were also open cycle and why steam trains released great plumes of steam when they moved. The Aeolipile is exceedingly easy to reduce the steam outflow by having smaller nozzles. Given that they are basically a solid sphere made with four pipes sticking out they would have been the easiest form of high pressure engine to keep from exploding if there was a demand for mechanical work. They would however still explode, unlike the atmospheric engines.