:Heat Balance Equations and the Equivalent Mass of the Heated Metal in Boiler Dynamic Models
Wang Guang-jun, Zhang Chcn-yue
Calculation and comparisons show that the error caused by the assumption of concurrent temperatures of working medium and heated surfaces in boiler dynamic models is not negligible. In this paper, the cause of excessive error is discussed, the concepts of equivalent coefficient and equivalent mass of heated surface are proffered, and a formula for calculating the equivalent coefficient is derived. By the introduction of equivalent mass into the heat balance, the precision of the simplified dynamic model is raised.