Plant-level intelligent operation optimization for cogeneration units equipped with absorption heat pumps

doi:10.3969/j.issn.2097-0706.2024.03.003

Abstract

Abstract:

To improve the overall operational economy of the power plant equipped with cogeneration units and absorption heat pumps， a coal consumption prediction mathematical model for cogeneration units is constructed based on the power plant's historical data which are then pre-processed by sliding window method to define steady-state operating conditions. There is a fitness function implemented to get the minimum total coal consumption of the cogeneration units， and particle swarm optimization algorithm is used to obtain the optimal back pressure of the air cooling unit equipped with an absorption heat pump and the optimal extraction steam flow of each cogeneration unit. Then， an intelligent optimization software for this heating system is designed based on the data above， to realize online monitoring and optimization regulation on the heating system. The optimization regulation can provide guidance for individual heating units to achieve their best economic performances and lowest coal consumptions. Simulation results indicate that the intelligent optimization can save 1.81 t standard coal per hour for the heating system of this case， showing a significant energy-saving effect.

Key words: cogeneration unit, absorption heat pump, heating-supply made by multiple units, coal consumption, particle swarm optimization, online monitoring, back pressure, optimal pumping, extraction steam

CLC Number:

TK115

WANG Yongxu, ZHOU Tianyu, DENG Genggeng, XU Gang, WANG Zhuo. Plant-level intelligent operation optimization for cogeneration units equipped with absorption heat pumps[J]. Integrated Intelligent Energy, 2024, 46(3): 20-28.

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参数	湿冷机组（^#1— ^#4）	空冷机组（^#5）
数量/台	4	1
额定发电功率/MW	220	600
主蒸汽压力/MPa	12.75	16.70
主蒸汽温度/℃	535	537
额定主蒸汽流量/(t·h^-1)	642.22	1 845.97
再热蒸汽压力/MPa	2.27	3.23
再热蒸汽温度/℃	535	537
额定再热蒸汽流量/(t·h^-1)	566.58	1 540.50
排汽压力/MPa	0.005 2	0.013 0
热泵驱动蒸汽压力/MPa		0.3
热网水流量/(t·h^-1)		1 300
热泵乏汽压力/kPa		20
热泵性能系数		1.7
热网水进/出口温度/℃	85/110	55/85