The Analysis between Two Different Methods of Power Plant Boiler Thermal Efficiency

Abstract:

The power plant boiler is one of the most important facilities in thermal power plants. The thermal efficiency of power plant boilers is the index. This paper discusses the relationship between the boiler thermal efficiency and the coefficient of excess air via two methods, one is called the simplified calculating formula and the other is the calculating formula according to the The People's Republic of China national standard power plant boiler performance test procedures. According to the proposed methods, by solving the same optimal problem, optimum excess air coefficients are obtained. Then a comparative analysis is given. Moreover, an improved way for saving calculation time to get the coefficients of the mixed coal in the so called simplified calculating formula is developed.

• Periodical: Applied Mechanics and Materials (Volumes 536-537)
• Pages: 1578-1582
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.536-537.1578
• Online since: April 2014
• Authors: Po Li*, Cheng Wei Zhang
• Keywords: Boiler Heat Loss, Coal Quality Coefficient, Coefficient of Excess Air, Contrast Experiment, Power Plant Boiler Thermal Efficiency

References

[1] ZHOU Haizhu, AN Enke, The Development in Combustion Optimization Technology of Utility Coal-fired Boiler [J]. Boiler Technology 2008, 39(1): 39-41.

[2] WANG Zhi-xin, BAO De-mei, CAO Liming, QING Zheng, Multi-objective Neural Network Optimization for Boiler Combustion Systems [J]. Power Equipment 2012, 26(2): 97-99.

[3] YANG Fan, The Optimization System for Power Plant Boiler [J]. Coal 2010, 19(1): 53-54.

[4] FENG Lei-hua, GUI Wei-hua, YANG Feng, Improved Particle Swarm Optimization to Optimize Combustion of Power Plant Boiler for Low NOx Emission [J]. Journal of System Simulation 2011, 23(12): 2812-2815.

[5] GAO Li-xia, YUAN Long-ji, ZHOU Ze-ni, LI Cong. New Way to Ascertain Optimal Excess Air Coefficient [J]. Coal Mine Machinery 2009, 30(8): 31-33.

[6] WANG Yan-kai. Method Study on Determining the Best Furnace Over-air Coefficient by Test [J]. Inner Mongolia Electric Power 2003, 21(5): 61-62.

[7] YE Shu-zhen, ZHANG Zhan-yu. The Discussion about the Heat Loss due to Exhaust Air [J].

[8] LIU Shi-ci. The Simplified Calculation of The Boiler Heat Loss due to Exhaust Air [J].

[9] Ministry of electronics industry Chinese. Performance test code for utility boiler GB10184-88[S]. (1986).

[10] LI Zhi, CAI Jiu-ju, CAO Fu-yi, HU Jun-yu. On-line calculation method of coal boiler efficiency at power station [J]. Energy Conservation 2005, 3: 28-29.