煤的发热量又称煤炭大卡，是煤炭在氧弹中燃烧时产生的热量（热值、大卡），根据输入硫、氢、全水分、分析水仪器自动计算出煤的高位发热量、低位发热量及收到基低位发热量。
煤的发热量是一项重要的指标。
测定劣质煤的发热量时，在煤样中加入标准苯甲酸，帮助样品燃烧完全。
Calorific value of poor quality coal can be determined by addition of benzoic acid as standard, which can enhance the sample to burn out.
阐述了煤的发热量测量的意义，介绍了用VB开发热值测量系统软件的思路和实现。
The meaning of calorific value measurement is presented and how to develop software of system of calorific value measurement with VB is discussed.
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