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Title: Heat Quantity Calculation Relating To Water Vapor In Natural Gas
Author: Edgar B. Bowles, Jr Darin L. George
Source: 2014 International School of Hydrocarbon Measurement
Year Published: 2014
Abstract: Natural gas often contains some amount of water, in either vapor or liquid form. The solubility of water in natural gas flowing through a pipeline is a function of the pressu re and temperature of the flowing stream. The amount of water affects the heating (calorific) value per unit volume of natural gas. The more water present in the gas, the less valuable it is as a fuel, since the water displace s the hydrocarbon components in a natural gas mixture and does not burn. This water, in vapor form, is sometimes re ferred to as spectator water. The net effect is a reduction in heating value and monetary value per unit volu me of gas. The amount of water vapor contained in a natural gas mixture is customarily expr essed in terms of the mass of water per unit volume of gas, for example, pounds mass of water per million standard cubic feet of natural gas (lb m /MMscf)

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