为进一步提高新能源在冷-热-电联供系统(combined cooling heating and power system,CCHP)中的供能比例,在传统CCHP的基础之上,引入新能源供能技术,构建了一种高比例新能源接入的冷-热-电联供系统(high proportion of new energy acces...为进一步提高新能源在冷-热-电联供系统(combined cooling heating and power system,CCHP)中的供能比例,在传统CCHP的基础之上,引入新能源供能技术,构建了一种高比例新能源接入的冷-热-电联供系统(high proportion of new energy access combined cooling heating and power system,HPNE-CCHP)。为了使系统运行更加经济,以HPNE-CCHP系统的总运行成本为目标函数,搭建了混合整数经济调度模型,提出一种自适应混沌粒子群算法(adaptive chaotic particle swarm optimization,ACPSO)对模型进行求解。以中国北方某楼宇为例,构建了HPNECCHP系统,将所提模型及求解算法应用于该建筑的典型日的实际算例中,并与不含太阳能供热的CCHP系统进行了对比。仿真结果表明,该模型可以有效对系统进行调度,提高新能源的利用效率,使系统以更加经济的方式运行。展开更多
冷-热-电联供综合能源系统(integrated energy system with combined cool,heat and power system,IES-CCHP)能够就地消纳分布式风电、光伏,也能够同时满足系统内电动汽车用户的充电需求。然而,电动汽车充电需求、风电出力、光伏出力的...冷-热-电联供综合能源系统(integrated energy system with combined cool,heat and power system,IES-CCHP)能够就地消纳分布式风电、光伏,也能够同时满足系统内电动汽车用户的充电需求。然而,电动汽车充电需求、风电出力、光伏出力的随机性严重影响了IES-CCHP运行的经济性。因此,采用两阶段可调鲁棒优化为IES-CCHP制定日前调度策略以提升系统运行经济性。日前阶段在观测到随机变量前制定能够应对最恶劣运行场景的日前调度策略;实时阶段在确认随机变量实际值后决策实时调度计划修正日前调度策略。优化目标为运行两阶段运行总成本最小,模型采用非精确狄利克雷模型挖掘历史数据构建不确定集描述随机变量,并进一步采用对偶理论、大M法、列与约束生成(columnand-constraint generation,C&CG)等方法,迭代求解上述两阶段模型。最后,通过算例分析证明了所提模型与方法的有效性。展开更多
The universal mathematical model of an engine is established,and an economical zone,in which an engine mainly provides medium output load at medium speed,is presented.Based on the experimental data and the universal m...The universal mathematical model of an engine is established,and an economical zone,in which an engine mainly provides medium output load at medium speed,is presented.Based on the experimental data and the universal model of such an engine above,a mathematical model of a refitted engine is provided.The boundary of the corresponding economical zone is further demarcated,and the optimal operating curve and the operating point of the engine are analyzed.Then,the energy transforming models of the power system are established in the mode of cooling,heating and power（MCHP）,the mode of heating and power（MHP）and the mode of electricity powering（MEP）.The parameter matching of the power system is optimized according to the transmission ratios of the gear box in the power distribution system.The results show that,in the MCHP,the speed transmission ratio of the engine to the gear box（ies）and the speed transmission ratio of the motor to the gear box（ims）are defined as 2.9 and 1,respectively;in the MHP,when the demand load of the power system is less than the low critical load of the economical zone,the speed transmission ratio of the motor to the engine（ime）is equal to 1,and when the demand load of the power system exceeds the low critical load of the economical zone,ime equals 0.85;in the MEP,the optimal value of ims is defined as 2.5.展开更多
The increasing pace of urbanization means that cities and global organizations are looking for ways to increase energy efficiency and reduce emissions. Combined cooling, heating, and power （CCHP） systems have the po...The increasing pace of urbanization means that cities and global organizations are looking for ways to increase energy efficiency and reduce emissions. Combined cooling, heating, and power （CCHP） systems have the potential to improve the energy generation efficiency of a city or urban region by providing energy for heating, cooling, and electricity simultaneously. The purpose of this study is to estimate the water consumption for energy generation use, carbon dioxide （CO2） and NOx emissions, and economic impact of implementing CCHP systems for five generic building types within the Atlanta metropolitan region, under various operational scenarios following the building thermal （heating and cooling） demands. Operating the CCHP system to follow the hourly thermal demand reduces CO2 emissions for most building types both with and without net metering. The system can be economically beneficial for all building types depending on the price of natural gas, the implementation of net metering, and the cost structure assumed for the CCHP system. The greatest reduction in water consumption for energy production and NOx emissions occurs when there is net metering and when the system is operated to meet the maximum yearly thermal demand, although this scenario also results in an increase in greenhouse gas emissions and, in some cases, cost. CCHP systems are more economical for medium office, large office, and multifamilv residential buildings.展开更多
提出了一种耦合液化天然气压力能的新型冷-热-电联供(CCHP,combined cooling,heating and power)系统.以西安某工业园为研究对象,采用单纯形算法,以经济性最优为目标函数对系统的运行参数进行了优化,分析了电上网政策对设备出力和系统...提出了一种耦合液化天然气压力能的新型冷-热-电联供(CCHP,combined cooling,heating and power)系统.以西安某工业园为研究对象,采用单纯形算法,以经济性最优为目标函数对系统的运行参数进行了优化,分析了电上网政策对设备出力和系统性能的影响,并以能效、火用效和单位产能CO;排放量作为评价指标,对该系统进行了综合评价.结果表明,与常规CCHP系统相比,该新型系统的年费用和单位产能CO;排放量可分别减少2.9×10;元和29.82 g/(kW·h),一次能源利用率和火用效率可分别提高4.05%和0.44%.展开更多
文摘为进一步提高新能源在冷-热-电联供系统(combined cooling heating and power system,CCHP)中的供能比例,在传统CCHP的基础之上,引入新能源供能技术,构建了一种高比例新能源接入的冷-热-电联供系统(high proportion of new energy access combined cooling heating and power system,HPNE-CCHP)。为了使系统运行更加经济,以HPNE-CCHP系统的总运行成本为目标函数,搭建了混合整数经济调度模型,提出一种自适应混沌粒子群算法(adaptive chaotic particle swarm optimization,ACPSO)对模型进行求解。以中国北方某楼宇为例,构建了HPNECCHP系统,将所提模型及求解算法应用于该建筑的典型日的实际算例中,并与不含太阳能供热的CCHP系统进行了对比。仿真结果表明,该模型可以有效对系统进行调度,提高新能源的利用效率,使系统以更加经济的方式运行。
文摘冷-热-电联供综合能源系统(integrated energy system with combined cool,heat and power system,IES-CCHP)能够就地消纳分布式风电、光伏,也能够同时满足系统内电动汽车用户的充电需求。然而,电动汽车充电需求、风电出力、光伏出力的随机性严重影响了IES-CCHP运行的经济性。因此,采用两阶段可调鲁棒优化为IES-CCHP制定日前调度策略以提升系统运行经济性。日前阶段在观测到随机变量前制定能够应对最恶劣运行场景的日前调度策略;实时阶段在确认随机变量实际值后决策实时调度计划修正日前调度策略。优化目标为运行两阶段运行总成本最小,模型采用非精确狄利克雷模型挖掘历史数据构建不确定集描述随机变量,并进一步采用对偶理论、大M法、列与约束生成(columnand-constraint generation,C&CG)等方法,迭代求解上述两阶段模型。最后,通过算例分析证明了所提模型与方法的有效性。
基金The Natural Science Foundation of Jiangsu Higher Education Institutions of China(No.2009112TSJ0124)
文摘The universal mathematical model of an engine is established,and an economical zone,in which an engine mainly provides medium output load at medium speed,is presented.Based on the experimental data and the universal model of such an engine above,a mathematical model of a refitted engine is provided.The boundary of the corresponding economical zone is further demarcated,and the optimal operating curve and the operating point of the engine are analyzed.Then,the energy transforming models of the power system are established in the mode of cooling,heating and power（MCHP）,the mode of heating and power（MHP）and the mode of electricity powering（MEP）.The parameter matching of the power system is optimized according to the transmission ratios of the gear box in the power distribution system.The results show that,in the MCHP,the speed transmission ratio of the engine to the gear box（ies）and the speed transmission ratio of the motor to the gear box（ims）are defined as 2.9 and 1,respectively;in the MHP,when the demand load of the power system is less than the low critical load of the economical zone,the speed transmission ratio of the motor to the engine（ime）is equal to 1,and when the demand load of the power system exceeds the low critical load of the economical zone,ime equals 0.85;in the MEP,the optimal value of ims is defined as 2.5.
基金This work was partially supported by the Brook Byers Institute for Sustainable Systems, the Hightower Chair, Georgia Research Alliance, and grants （083604, 1441208） from the US National Science Foundation Program for Emerging Frontiers in Research and Innovation （EFRI）.
文摘The increasing pace of urbanization means that cities and global organizations are looking for ways to increase energy efficiency and reduce emissions. Combined cooling, heating, and power （CCHP） systems have the potential to improve the energy generation efficiency of a city or urban region by providing energy for heating, cooling, and electricity simultaneously. The purpose of this study is to estimate the water consumption for energy generation use, carbon dioxide （CO2） and NOx emissions, and economic impact of implementing CCHP systems for five generic building types within the Atlanta metropolitan region, under various operational scenarios following the building thermal （heating and cooling） demands. Operating the CCHP system to follow the hourly thermal demand reduces CO2 emissions for most building types both with and without net metering. The system can be economically beneficial for all building types depending on the price of natural gas, the implementation of net metering, and the cost structure assumed for the CCHP system. The greatest reduction in water consumption for energy production and NOx emissions occurs when there is net metering and when the system is operated to meet the maximum yearly thermal demand, although this scenario also results in an increase in greenhouse gas emissions and, in some cases, cost. CCHP systems are more economical for medium office, large office, and multifamilv residential buildings.
文摘提出了一种耦合液化天然气压力能的新型冷-热-电联供(CCHP,combined cooling,heating and power)系统.以西安某工业园为研究对象,采用单纯形算法,以经济性最优为目标函数对系统的运行参数进行了优化,分析了电上网政策对设备出力和系统性能的影响,并以能效、火用效和单位产能CO;排放量作为评价指标,对该系统进行了综合评价.结果表明,与常规CCHP系统相比,该新型系统的年费用和单位产能CO;排放量可分别减少2.9×10;元和29.82 g/(kW·h),一次能源利用率和火用效率可分别提高4.05%和0.44%.
