Analysis on Thermal Economy and Peak-Shaving Capability for Combined Heat and Power (CHP) Unit in Varying Operating Conditions

Abstract:

Based on the principle of featured through-current area being constant, calculation model for parameters of regenerative steam extraction of CHP unit in different heating conditions is developed in this paper through using FROTRAN software. The generated output and thermal economy of the CHP unit are calculated by using the method of equivalent enthalpy drop, and the accuracy of the model is verified. With the purpose to analyze the rationality of different calculation methods, the distribution ratio of coal consumption for heat supply and coal consumption rate for power generation are calculated through method of equivalent enthalpy drop, heat quantity method and method of actual enthalpy drop under the same operating condition. Moreover, according to the operation test on the unit, the highest and lowest generated output of the CHP under various loads of heat supply are determined, which will provide a basis to the subsequent thermoelectric units in participating in peak shaving of power grid.

• Periodical: Applied Mechanics and Materials (Volume 521)
• Pages: 508-515
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.521.508
• Online since: February 2014
• Authors: Chun Guang Tian, Xiang Yu Lv, De Xin Li*, Tian Dong, Xiao Juan Han
• Keywords: CHP, Method of Equivalent Enthalpy Drop, Peak-Shaving Capability, Thermal Economy

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