APPLICATION OF ROTARY VANE EXPANDERS IN SYSTEMS UTILIZING THE WASTE HEAT

摘要

Sources of waste heat have generally a very low heat output. Their utilization as positive heat sources in the C-R cycle with low-boiling refrigerants requires the application of expanders. Turbines are inefficient in this respect because of low steam flows. However, volumetric rotary machines can be sucessfully employed as expanders. In the present paper those properties of rotary vane machines are discussed which make them especially useful as expanders in the C-R cycles with the low-boiling refrigerant A multistage vane expander and a thermodynamic cycle adjusted to it are also discussed. Authors1 experience acquired in the designing of a system that utilizes the rotary vane expanders for waste heat recovering plants is also presented.