enthalpy

This paper provides the analyses and study of the calculation methods for thermal efficiency and selects equivalent enthalpy drop of varied heat to calculate thermal efficiency of Hai Bo Wan power plant.

文中对火电厂热力系统的各种热效率计算法进行比较，选用变热量等效焓降法计算海勃湾发电厂200MW凝汽式机组热力系统的热效率。

By strict mathematical deduction, it is being proven that the influence of steam extraction pressure loss on a unit's thermal efficiency is equivalent to the linear superposed effects on efficiency, caused by relevant heaters' out flowing feed and drain water enthalpy variation.

经过严格的数学推导，证明了抽汽压损对热经济性的影响等同于抽汽压损引起的加热器出口水焓和疏水焓变化对热经济性影响的线性叠加。

Tetrazole compounds and its salts have high formation enthalpy, high melting points, low vapor pressure and good thermal stability, which is a kind of promising energetic compounds.

四唑类化合物及其盐具有生成焓高，熔点高，蒸汽压低，稳定性好等特点，是一类很有发展潜力的含能材料。