FUNDAMENTALS OF SAMPLING NATURAL GAS FOR BTU DETERMINATION

摘要

This paper discusses the fundamentals of extracting,conditioning,and transporting natural gas samples for "on line" BTU analysis.INTRODUCTION It has long been recognized that the largest source of error in the analysis of natural gas is the sample conditioning system (SCS).The sample conditioning systems consist of all components through which the sample gas travels from its source,typically a pipeline,to the gas chromatograph (GC) inject valve.The purpose of the sample conditioning system is to extract a natural gas sample that is representative of the source,transport it to an "on line" gas chromatograph,and in the process condition it so that it is compatible with the analyzer.