Equivalent Enthalpy Drop Method with Application in a 330 Mw Double Pumping Cogeneration Unit and its Thermal Characteristics Analysis

Abstract:

It is quite convenient and flexible to adopt the equivalent enthalpy drop method, in order to analyze a thermal system. In this report, a 330MW cogeneration unit will be chosen, as a case in point, to provide quantitative calculation and qualitative analysis in both global and local aspects. According to our research, this cogeneration unit is designed to operate in a double pumping status. It has such properties as follows: Under 85%BMCR double pumping condition, its highest efficiency of power generation is obtained. In pure condensing conditions with around 70% load, the steam consumption rate reaches minimal level. The reason for this phenomenon lies in the maximal net equivalent enthalpy drop of new steam, although with 70% load, the power generation efficiency is much lower than that in rated pure condensing conditions.

• Periodical: Applied Mechanics and Materials (Volumes 446-447)
• Pages: 802-809
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.446-447.802
• Online since: November 2013
• Authors: Yu Zhu, Qian Jun Li, Li Kun Zheng, Yong Xin Fang
• Keywords: Cogeneration, Equivalent Enthalpy Drop, Thermodynamic Properties

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