Economic analysis of absorption heat pump coupling NC turbines in thermal power plant

As to the contradiction between the heating demand and heating capacity,and the problem of the utilization of low-grade condensing heat in power plants,this paper took a 300MW extraction-condensing unit(NC unit)as an example,designed the heating program of absorption heat pump coupled NC unit.First,combined with the heating program,proposed the conception of heating area expansion rate.Then,set the heating area expansion rate、the comprehensive energy utilization rate and the thermal and power total income as economic comparison standard,using constant-flow thermodynamic calculation method,compared the three economic indicators of coupling heating way and traditional thermal-power cogeneration heating way.Finally,the results show that the coupled heating mode could expand the heating area、 improve the energy efficiency,and increase the economic benefits of the thermal power plant,when the unit capacity did not change.