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 NO x emission it performs very well which can effectively control NO x emission 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 NO x emission 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/mm2 and structure factor ε in 30–40, as well as swirling strip-port gas cookers are port thermal intensity in 8.0–11.5 W/mm2 with structure factor ε in 35–45.
关键词：Domestic gas cooker ; Swirling strip-port ; Normal round-port ; Thermal efficiency ; Emission ; Natural gas interchange
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