This turbine can also be successfully applied to condensing plants operating with high vacuum. However, the best economic results in the development of power from steam by the Tesla turbine will be obtained in plants especially adapted for the purpose. Minor departures from the turbine, as may be dictated by the circumstances in each case, will obviously suggest themselves but if it is carried out on these general lines it will be found highly profitable to the owners of the steam plant while permitting the use of their old installation. Tesla wrote 'This turbine is an efficient self-starting prime mover which may be operated as a steam or mixed fluid turbine at will, without changes in construction and is on this account very convenient. Since the rotor has no projections, it is very sturdy. As the gas slows and adds energy to the disks, it spirals in to the center exhaust. The gases drag on the disk by means of viscosity and the adhesion of the surface layer of the gas. A Tesla turbine consists of a set of smooth disks, with nozzles applying a moving gas to the edge of the disk.
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