May 2011
Beginner
492 pages
14h 16m
English
Content preview from Heat and Thermodynamics
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12.6 Boltzmann ′s Ether Engine
In this engine, radiation is used as the working substance. It consists of a hollow cylinder and a frictionless piston (Fig. 12.8). The walls and base of the cylinder also the piston are impervious to heat. They have vanishingly small heat capacity and are placed in perfect vacuum. In the base of the cylinder, there is a small hole through which radiation can pass into or out of the cylinder. This hole may be closed by a disc which is a perfect reflector. The source of heat is a black body at temperature T1. The sink is another black body at a lower temperature T2. We shall suppose the temperature T1 to be only slightly higher than T2; with this engine, we now perform the following cycle of operations:
Fig. ...
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