Combustion performance of domestic gas cookers with swirling strip-port and normal round-port on various natural gas compositions

摘要

This document aims to assess the different performance of swirling strip-port and normal round-port domestic gas cookers with gas property fluctuation and propose suitable structure design parameter for both port types. Comparing with normal round-port gas cookers, swirling strip-port samples are not advantage on aspects of thermal efficiency and CO emission, but in term of NOxemission it performs very well which can effectively control NOxemission in a suitable range and improve gas cooker′s adaptive capacity, when natural gas is interchanged. It is easier to qualify CO emission with low NOxemission for swirling strip-port gas cookers, though it will sacrifice a part of thermal efficiency, while normal round-port gas cookers are easier to qualify CO emission with high thermal efficiency. The burner head design structure parameters of normal round-port gas cookers which can well adapt natural gas interchange are port thermal intensity in 7.2–8.4?W/mm2and structure factor ε in 30–40, as well as swirling strip-port gas cookers are port thermal intensity in 8.0–11.5?W/mm2with structure factor ε in 35–45.