The Optimization Model and Its Application Research on the Thermal System of CHP Cogeneration Unit Based on "Unit Fuel Consumption" Theory

This dissertation provides a new way of research thinking to the optimization of CHP cogeneration unit's thermal system, using 'unit consumption analysis'. The 'fuel unit consumption analysis' method is applied to build up the optimization model of a thermal system in cogeneration unit, and to propose the optimization scheme of the waste heat recovery system or condenser circulating water for heat supply. Meanwhile, the optimization scheme of reducing the heat supply network terminal temperature difference is put forward as well. After the application of these optimization models and schemes in the 300MW cogeneration unit, the results show that with the reduction of the heat exchanger's terminal temperature difference, the unit fuel consumption of the cogeneration unit drops significantly. The optimization models and the specific optimization scheme proposed in this paper to a certain extent provide and important reference to the energy saving in cogeneration units.