The Study Of General Thermal Economics Analytical Model For Power Plants Under Multi-factor Of Disturbance

Thermal economics analysis is part of the basic theoretical work for coal-fired power plant's energy saving and coal consumption decrease.Therefore,based on the unified physical model and the mathematic model of heat-economic analysis for coal-fired power unit,two general analysis models were established in this paper,which can calculate the influence of reheat spray flux and condenser depression on unit's thermal economics.An analysis model was also established to calculate the effect of relative internal efficiency of cylinders on power unit's thermal economics.For the limit of single-factor-varying analysis models,a general analysis model for monitoring condenser vacuum under multi-factor of disturbance was preliminarily established, according to the actual operating conditions of power plant and the circumstances of the operating parameters influencing each other.The models established in this paper were proved to be accurate,simple and general for application,which is especially suitable for on-line system monitoring on unit heat economy.