The variations of lower heating value, theoretical air fuel ratio and combustion potential of natural gas fuel were investigated according to the variation of natural gas composition in China.
根据中国天然气组分变化的情况，研究了天然气组分变化时，燃料的低热值、理论空燃比和燃烧势等燃烧参数的变化；
The heating value of the natural gas used as the fuel for the glass melting must be accurately controlled to improve the production quality of color TV tubes.
为了提高彩管玻壳的生产质量，要求对做为玻璃炉窑燃料的天然气的热值进行精确控制。
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