Experimental study on interchangeability of multi-source natural gas in Shanghai

摘要

The interchangeabilities of pipeline natural gas (PNG) and liquefied natural gas (LNG) with respect to application in typical domestic gas stoves in Shanghai were investigated. Mixed gases of PNG and ethane were produced so as to have Wobbe indices (WI) and combustion potential (CP) nearly equivalent to the mixtures of PNG and LNG, in which LNG volume fraction varied from 0% to 100%. With the increase of LNG percentage in the mixture, it was found that all stoves heat inputs increase and about 1/4 stoves CO emissions vary acutely, while thermal efficiency and NO_x emissions of all stoves do not change significantly. Performance of desktop stoves is better than that of embedded ones. Adjusting primary air inlet could mitigate yellow tipping, but the influence on CO emission is uncertain. Solution of natural gas interchangeability should be based on both gas source and gas appliance.