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Title: Propane-Air Plants Streamlining Operations Through The Use Of Technology
Author: John Hoch, Kevin Ritz
Source: American Gas Association 2004
Year Published: 2004
Abstract: Control schemes for propane-air systems have undergone a tremendous change over the past 15 years. Pushed primarily by the need to improve reliability, while simultaneously reducing or reordering manpower requirements, control systems have transformed the operation of these plants in fundamental ways. This paper explores propane-air systems and their use in a natural gas infrastructure, and provides an overview of control requirements and how modern control technologies are being applied to these systems. Natural-gas utilities have long used propane-air plants to supplement, or peak shave, gas deliveries during periods of high demand. End users also use these systems, having been given economic incentive to be interruptible gas consumers. Sometimes propane-air is used to allow development of a natural gas infrastructure when natural gas is not yet available. All these uses involve the same mixture of propane and air, differing only in the point at which injection into the natural gas system takes place. Figure 1 illustrates where these systems are installed at the distribution end of the network. The reason for this location has to do with properties of propane and air mixtures and the economics that drive installation of propane-air facilities.

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