Thermodynamic analysis of low vacuum circulating water heating technology for condensate pumping units

Some enterprises of heat and power cogeneration are reforming condensate pumping units with the low vacuum circulating water heating technology to improve their heating capacity. Performs economical efficiency and exergy analyses of this technology to the application. From the viewpoint of the exergy analysis, low vacuum circulating water heating operation mode has minor superiority over the pure condensate operation mode. Hence, for heat and power cogeneration system, the enterprises should pay more attention to the quality loss of energy but not merely the economic efficiency. A variety of energy-saving technologies should be correctly analysed and evaluated based on the total energy concept.