一种分布式供能系统用于现代农业大棚的案例研究
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摘要
随着现代农业大棚规模的不断扩大,大棚供能系统的优化发展显得尤为重要。研究了上海某农业大棚的冷、热、电负荷和CO_2需求联合考虑案例。案例中,根据以热定电的原则,设计以天然气为核心的分布式供能系统,并将排烟送入大棚,提供大棚所需的CO_2。系统的主要设备有燃气轮机、吸收式溴冷机、蓄能水箱和换热器。制定了系统在不同季节的运行方案,并将联产系统和传统的分产系统全年能耗量进行对比。通过对比得出结论:在提供相同的冷、热和电负荷的前提下联产系统比分产系统更加节能;联产系统可以做到CO_2的减排,产生的CO_2量理论上足够满足大棚的CO_2需求。联产系统在大棚上的应用可以做到冷、热、电和CO_2四联产。
With expanding scale of modern agricultural greenhouses,the optimization of greenhouse energy supply system is particularly important. Based on the cold,heat,electricity load and CO_2 demand of an agricultural greenhouse in Shanghai,a set of distributed energy supply system with natural gas working as the core was designed according to the principle of fixing power based on heat,and the smoke was sent into the greenhouse to provide the CO_2 needed for the greenhouse. The main equipments of the system include the gas turbine,absorption type bromine cooler,energy storage water tank and heat exchanger. The operation scheme of the system in different seasons is formulated,and the annual energy consumption of the combined production system and the traditional production system is compared. By comparison,some conclusions are drawn as follows: given the same cold,heat and electricity load,the production system of the combined production system is more energy saving; the co-production system can achieve CO_2 emission reduction,and the amount of CO_2 generated is enough to meet the CO_2 demand of greenhouse. The application of CO_2 production system in the greenhouse can achieve four cogeneration of cold,heat,electricity and CO_2.
With expanding scale of modern agricultural greenhouses,the optimization of greenhouse energy supply system is particularly important. Based on the cold,heat,electricity load and CO_2 demand of an agricultural greenhouse in Shanghai,a set of distributed energy supply system with natural gas working as the core was designed according to the principle of fixing power based on heat,and the smoke was sent into the greenhouse to provide the CO_2 needed for the greenhouse. The main equipments of the system include the gas turbine,absorption type bromine cooler,energy storage water tank and heat exchanger. The operation scheme of the system in different seasons is formulated,and the annual energy consumption of the combined production system and the traditional production system is compared. By comparison,some conclusions are drawn as follows: given the same cold,heat and electricity load,the production system of the combined production system is more energy saving; the co-production system can achieve CO_2 emission reduction,and the amount of CO_2 generated is enough to meet the CO_2 demand of greenhouse. The application of CO_2 production system in the greenhouse can achieve four cogeneration of cold,heat,electricity and CO_2.
引文
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[2]余情,杨金明.光伏发电技术在温室中的应用[J].新能源进展,2015,3(4):251-255.
[3]鲁敏,岑红蕾,郭天圣.温室大棚复合供能优化配置研究[J].农机化研究,2014(3):66-69.
[4]李鹏,华浩瑞.基于储能调度模式的分布式光伏两阶段多目标就地消纳模型[J].电力科学与工程,2016,32(10):1-8.
[5]罗宁,何青.1000 MW超超临界机组烟气余热集成利用技术研究[J].电力科学与工程,2017,33(6):42-47.
[6]高威,王玉璋,翁一武,等.改善国内分布式供能系统经济性的建议[J].燃气轮机技术,2014(1):1-5.
[7]王新雷,田雪沁,徐彤.美国天然气分布式能源发展及对我国的启示[J].中国能源,2013,35(10):25-28.
[8]罗宁,何青.功率负荷不平衡保护误动原因分析[J].电力科学与工程,2017,33(8):48-53.
[9]刘仁志,李元媛,杨勇平.新型太阳能与燃气轮机联合循环互补系统集热场优化研究[J].工程热物理学报,2016,37(9):1817-1821.
[10]STRACHAN N,FARRELL A.Emissions from distributed vs.centralized generation:The importance of system performance[J].Energy Policy,2006,34(17):2677-2689.
[11]罗宁,何青.火电机组凝汽器真空故障诊断的研究[J].电力科学与工程,2017,33(5):70-78.
[12]印佳敏,杨劲.分布式供能系统在医院的应用研究[J].节能,2015,34(9):36-39.
[13]李清然,张建成.分布式光伏对配电网电能质量的影响及调压方案[J].电力科学与工程,2015,31(10):1-6.
[14]AKOREDE M F,HIZAM H,POURESMAEIL E.Distributed energy resources and benefits to the environment[J].Renewable&Sustainable Energy Reviews,2010,14(2):724-734.
[15]戴永庆.溴化锂吸收式制冷技术及应用[M].北京:机械工业出版社,1997.