【摘要】 热平衡计算是船用增压锅炉热力性能计算的基础,由于增压机组参与锅炉热力过程,使增压锅炉热平衡计算更加复杂。本文提出了增压锅炉分段热平衡计算方法,并对直接热平衡和分段热平衡两种方法进行了分析探讨;提出了适用于增压锅炉变负荷计算的通用增压机组热损失公式,给出了针对辅助汽轮机做功的燃料支配热量计算公式,并进行了实例计算分析,分段热平衡计算结果比较理想,为船用增压锅炉性能计算分析提供了参考。更多还原

【Abstract】 Heat balance calculation is a basis for the thermodynamic performance calculation of turbo-charged marine boilers.As the turbo-charger unit participates in the thermodynamic process of the boiler,there may result a more complicated heat balance calculation of the turbo-charged marine boiler.A sectionalized calculation method is proposed for the heat balance calculation of the turbo-charged boiler along with an analysis and exploratory study of the direct heat-balance and sectionalized heat-balance calculation method.A general heat-loss formula applicable to the variable load calculation of the turbo-charged boiler is presented. A calculation formula of available heat quantity for fuel used to do work in an auxiliary steam turbine is given and a calculation and analysis of specific cases also performed.The sectionalized heat-balance calculation results are relatively satisfactory,thus providing a guide for the performance calculation and analysis of the turbo-charged marine boilers.更多还原