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Title: Power Generation With Turbo Expanders
Author: Anthony Cleveland
Source: American Gas Association 1990
Year Published: 1990
Abstract: Turbo expanders can be used in place of regulating valves to control pressure of gas supplied to the customer from transmission or distribution systems. The turbo expander captures some of the energy that is otherwise wasted in the regulation process, and this energy can be put to use in the generation of electricity. This application of turbo expanders is particularly useful where electrical energy is relatively costly, unreliable, or unavailable This paper considers the background to work that is being done in Canada on the development of a small economical turbo expander specifically designed to recover the energy from pressure regulating stations. The theory behind the simple single-stage turbo expander is discussed, and the key operating parameters are defined. The application of turbo expanders to generating electricity in typical regimes of electrical price and gas cost are discussed.

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