相对内效率 meaning in English

internal efficiency ratio

The bigger no . 5 6 high pressure heater ' s difference temperature is another factor . the paper detaily analysed the reasons that turbine ' s relative intra - efficiency and condenser ' s vacuum lowering and no . 5 , 6 high pressure heater ' s difference temperature rising . it using the thermal system equal quantity analysis method , calculated the value that turbine unit thermal efficiency had been lowered
论文中对汽轮机相对内效率低、凝汽器真空低于设计值以及# 5 、 6高压加热器上、下端差大于设计值的原因进行了详细的分析，并将各因素对整个热力系统效率降低的影响程度进行了定量的分析和计算。
This paper based on the result of thermal system test of no . 2 turbine unit in liancheng power station . using compare method and thermal system equal quantity analysis method , analysed the factor lowering turbine unit thermal efficiency . in this , the lower turbine ' s relative intra - efficiency is main factor
其中，汽轮机相对内效率较设计值低是影响汽轮机组热力系统效率降低的主要因素；凝汽器真空低于设计值是影响汽轮机组热力系统效率降低的第二位因素； # 5 、 6高压加热器上、下端差大于设计值是影响汽轮机组回热系统效率降低的又一重要因素。