Is the high chimney above the turbine really necessary?
This often asked question is caused by the misconception that the cold air of the atmosphere is pushing the light air inside the chimney upwards. Indeed, the higher average random speed of the hot air’s molecules inside the chimney accelerates it towards the top so that a sucking action will keep the pressure inside collector and chimney below atmospheric pressure, with pressures being equal at the chimney top. Hence by cutting the chimney just above the turbine one would remove the sucking force and the updraft. To operate the machine without chimney one needs to put up internal pressure and to convert the collector into a high-pressure vessel with fans at the periphery to press cold air in against the internal pressure for continuous operation. Obviously this structure would be more expensive by orders of magnitude than the, compared to its size, extremely cheap collector.