The feasibility of the relevant technical method is discussed to the problems such as lower heating value of the coal gas, the poor comprehensive use of the coal gas and so on.

针对现行低温干馏工艺存在的煤气热值低、煤气未完全回收综合利用等问题，讨论了相关技术措施的可行性。

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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；

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These findings are generally consistent with an analysis by ICF International, which evaluated the impact of a 30% ITC for CHP projects with overall efficiencies of 70% lower heating value or greater.

FORBES: The Case for A Federal Cogeneration Standard