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Title: A Continuous Calorific Value Measuring System Based On A Correlative Method
Author: Virginie Van Ranterghem, Gaz De France, Stephane Loubat
Source: Flomeko 2003
Year Published: 2003
Abstract: 1. Introduction In the context of the gas market opening up to competition, the number of participants in the gas chain is increasing, exchanges are intensifying and the gas supply sources are multiplying for some parts of the world, notably in Europe where the networks are more and more interconnected. Therefore, it is crucial to be able to better determine the quantities of energy exchanged and the variations in the gas quality, with the view to having more accurate and more equitable billing. The variation over time in the calorific value at a given point in the grid can be as high as a few percent and can have important economic effects. Information on the Wobbe index or the density of the gas is also very useful for some industrial process controls: the Wobbe index variation may have strong effects on the products quality for industries like glassmakers. So important customers are more and more interested in a device able to continuously monitor gas quality variations, as well as the calorific value and the Wobbe index.

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