负荷特性对蓄能型建筑热电联供系统节能率的影响
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摘要
将蓄能与分布式建筑冷热电联供系统相结合,可有效改善系统变工况性能,对系统起到减容增效的作用。本文定义了负荷波动因子,用以简化描述用户负荷的波动程度,并建立了蓄能型热电联供系统节能率与燃气轮机性能、用户负荷特性间的解析关系。结果表明,系统节能率随燃气轮机空载燃料比、额定效率、用户需求热电比与热负荷波动因子的增大而增大。分析发现,蓄能的引入主要可减小燃气轮机的不可逆损失,从而节省整个系统的一次能源消耗。
Integrating thermal energy storage(TES) equipment with BCHP system proves to be an effective way to improve thermal performance. In this paper, load fluctuating factor is defined to depict load characteristics, and its analytical relationship with thermal performance of gas turbine and energy saving ratio of the whole system is established. The results show that energy saving ratio increases with increasing both heating load fluctuating factor and demand thermal power ratio.Moreover, exergy analysis indicates that due to the introduction of TES equipment, the irreversible loss of gas turbine declines significantly, which can save primary energy consumption of the whole TES-BCHP system.
Integrating thermal energy storage(TES) equipment with BCHP system proves to be an effective way to improve thermal performance. In this paper, load fluctuating factor is defined to depict load characteristics, and its analytical relationship with thermal performance of gas turbine and energy saving ratio of the whole system is established. The results show that energy saving ratio increases with increasing both heating load fluctuating factor and demand thermal power ratio.Moreover, exergy analysis indicates that due to the introduction of TES equipment, the irreversible loss of gas turbine declines significantly, which can save primary energy consumption of the whole TES-BCHP system.
引文
[1] Mago P J, Chamra L M, Ramsay J. Micro-Combined Cooling, Heating and Power Systems Hybrid ElectricThermal Load Following Operation[J]. Applied ThermalEngineering, 2010, 30(8/9):800-806
[2] WANG Jiangjiang, XU Zhongliang, JIN Hongguang. Design Optimization and Analysis of a Biomass Gasification Based BCHP System:a Case Study in Harbin, China[J].Renewable Energy, 2014, 71(11):572-583
[3]冯志兵,金红光.燃气轮机冷热电联产系统与蓄能变工况特性[J].中国电机工程学报,2006, 26(4):25-30FENG Zhibing, JIN Hongguang. Part-load Performance of CCHP with Gas Turbine and Storage System[J]. Proceedings of the CSEE, 2006, 26(4):25-30
[4] Fumo N, Mago P J, Chamra L M. Emission Operational Strategy for Combined Cooling Heating and Power Systems[J]. Applied Energy, 2009, 86(11):2344-2350
[5] ZHANG Yin, WANG Xin, ZHANG Yinping, et al. A Simplified Model to Study the Location Impact of Latent Thermal Energy Storage in Building Cooling Heating and Power System[J]. Energy, 2016, 114(11):885-894
[6] XIONG Fei, ZHANG Yin, WANG Xin, et al. Optimal Phase Change Temperature for Energy Storage Based on Fluctuating Loads in Building Cooling Heat and Power System[J]. Energy Procedia, 2015, 75:1360-1365
[7]张娜,蔡睿贤.单轴恒速燃气轮机及其供热并供装置的变工况显示解析[J].工程热物理学报,1998, 19(2):141-144ZHANG Na, CAI Ruixian. Analytical Solution of SingleShaft Gas Turbine under Part Load Conditions[J]. Journal of Thermophysics, 1998, 19(2):141-144
[2] WANG Jiangjiang, XU Zhongliang, JIN Hongguang. Design Optimization and Analysis of a Biomass Gasification Based BCHP System:a Case Study in Harbin, China[J].Renewable Energy, 2014, 71(11):572-583
[3]冯志兵,金红光.燃气轮机冷热电联产系统与蓄能变工况特性[J].中国电机工程学报,2006, 26(4):25-30FENG Zhibing, JIN Hongguang. Part-load Performance of CCHP with Gas Turbine and Storage System[J]. Proceedings of the CSEE, 2006, 26(4):25-30
[4] Fumo N, Mago P J, Chamra L M. Emission Operational Strategy for Combined Cooling Heating and Power Systems[J]. Applied Energy, 2009, 86(11):2344-2350
[5] ZHANG Yin, WANG Xin, ZHANG Yinping, et al. A Simplified Model to Study the Location Impact of Latent Thermal Energy Storage in Building Cooling Heating and Power System[J]. Energy, 2016, 114(11):885-894
[6] XIONG Fei, ZHANG Yin, WANG Xin, et al. Optimal Phase Change Temperature for Energy Storage Based on Fluctuating Loads in Building Cooling Heat and Power System[J]. Energy Procedia, 2015, 75:1360-1365
[7]张娜,蔡睿贤.单轴恒速燃气轮机及其供热并供装置的变工况显示解析[J].工程热物理学报,1998, 19(2):141-144ZHANG Na, CAI Ruixian. Analytical Solution of SingleShaft Gas Turbine under Part Load Conditions[J]. Journal of Thermophysics, 1998, 19(2):141-144