CRITICAL FLOW IN MOISTURE GENERATION SYSTEM FOR NATURAL GAS

摘要

A moisture provision and analyzer arrangement includes a conduit for obtaining a sample flow of natural gas, a moisture analyzer, and a bypass flow conduit. A main orifice is in fluid communication within the moisture provision and analyzer arrangement with flow proceeding to the moisture analyzer. A bypass orifice is located along the bypass flow conduit. The main orifice is sized and the flow provided to the moisture analyzer via the main orifice is at a pressure such that the flow provided to the moisture analyzer is at a critical flow condition and the bypass orifice is sized and the bypass flow is provided at a pressure such that the bypass flow is at a critical flow condition. Components in the moisture provision and analyzer arrangement are selected such that the critical flow rate through the main orifice and the critical flow rate through the bypass orifice are equal.

主权项

1. A moisture provision and analyzer arrangement for providing and analyzing moisture of a flowing stream of natural gas, the arrangement including:
a conduit for obtaining a sample flow of natural gas from the flowing stream of natural gas; a moisture analyzer that analyzes a moisture content of the sample flow provided to thereto; a bypass flow conduit that extends in fluid parallel to the moisture analyzer that provides a flow path through the moisture provision and analyzer arrangement without passing through the moisture analyzer; a main orifice in fluid communication within the moisture provision and analyzer arrangement and located upstream from the moisture analyzer, the sample flow provided to the moisture analyzer is provided to and proceeds through the main orifice; and a bypass orifice located along the bypass flow conduit; the main orifice is sized and the sample flow provided to the moisture analyzer via the main orifice is provided at a pressure from the main orifice such that the sample flow provided to the moisture analyzer is at a critical flow condition and the bypass orifice is sized and the bypass flow is provided at a pressure to the bypass orifice such that the bypass flow proceeding through the bypass orifice is at a critical flow condition.