设计了一套含储热装置的小型内燃发电机组冷热电联供系统(combined cooling heating and power,CCHP),在计及主要设备变负荷特性的基础上,提出了由折旧运行成本、能源成本和环境成本构成的经济优化模型。同时通过构建基于瞬时系统模拟...设计了一套含储热装置的小型内燃发电机组冷热电联供系统(combined cooling heating and power,CCHP),在计及主要设备变负荷特性的基础上,提出了由折旧运行成本、能源成本和环境成本构成的经济优化模型。同时通过构建基于瞬时系统模拟程序与Matlab的联合优化仿真平台,引入遗传算法求解得到燃机日逐时最优工况。以某地办公建筑夏、冬两季典型日负荷为例,详细分析了主要单元出力及各经济成本的变化情况。结果表明,相比"以电定热"的传统运行模式,优化工况在充分结合储热装置与分时电价机制的基础上有效提高了系统的综合经济性。上述研究结果可为CCHP系统的优化运行提供理论依据和平台支撑。展开更多
Gas turbines are increasingly and widely used,whose research and production reflect a country’s industrial capacity and level.Due to the changeable working environment,gas turbines usually work under the condition of...Gas turbines are increasingly and widely used,whose research and production reflect a country’s industrial capacity and level.Due to the changeable working environment,gas turbines usually work under the condition of simultaneous changes of ambient temperature,load and fuel.However,the current researches mainly focus on the change in single condition,and do not fully consider the simultaneous change in different conditions.On the basis of single condition,this paper further studies the dual off-design performance of gas turbines under three conditions:temperature-load,fuel-load and fuel-temperature.Firstly,the whole machine model of a gas turbine is established,in which the compressor model has the greatest impact on the performance of gas turbines.Therefore,this paper obtains a more accurate compressor model by combining the engineering modeling advantages of gPROMs and the powerful mathematical calculation ability of MATLAB neural network.Then,according to the established gas turbine model,the dual off-design performance is studied,which is mainly based on the parameter of output and efficiency.The result shows that the efficiency and power output of gas turbines will decrease with the increase of ambient temperature.With the decrease of fuel calorific value,power output and efficiency will increase.As the load decreases,the efficiency of the gas turbines will decrease,and these changes are consistent with the single off-design performance.However,when the fuel and temperature change simultaneously,only adjusting the IGV angle cannot avoid the surge when the temperature is above 30°C.At this time,it is necessary to adjust the extraction rate in order to ensure the safe and stable operation of gas turbines.Therefore,the research on dual off-design performance of gas turbines has an important significance for the peak shaving operation of gas turbines.展开更多
文摘设计了一套含储热装置的小型内燃发电机组冷热电联供系统(combined cooling heating and power,CCHP),在计及主要设备变负荷特性的基础上,提出了由折旧运行成本、能源成本和环境成本构成的经济优化模型。同时通过构建基于瞬时系统模拟程序与Matlab的联合优化仿真平台,引入遗传算法求解得到燃机日逐时最优工况。以某地办公建筑夏、冬两季典型日负荷为例,详细分析了主要单元出力及各经济成本的变化情况。结果表明,相比"以电定热"的传统运行模式,优化工况在充分结合储热装置与分时电价机制的基础上有效提高了系统的综合经济性。上述研究结果可为CCHP系统的优化运行提供理论依据和平台支撑。
基金The authors would like to acknowledge for the financial supports from the Fundamental Research Project in Chinese National Sciences and Technology Major Project Grant No.2017-1-0002-0002.
文摘Gas turbines are increasingly and widely used,whose research and production reflect a country’s industrial capacity and level.Due to the changeable working environment,gas turbines usually work under the condition of simultaneous changes of ambient temperature,load and fuel.However,the current researches mainly focus on the change in single condition,and do not fully consider the simultaneous change in different conditions.On the basis of single condition,this paper further studies the dual off-design performance of gas turbines under three conditions:temperature-load,fuel-load and fuel-temperature.Firstly,the whole machine model of a gas turbine is established,in which the compressor model has the greatest impact on the performance of gas turbines.Therefore,this paper obtains a more accurate compressor model by combining the engineering modeling advantages of gPROMs and the powerful mathematical calculation ability of MATLAB neural network.Then,according to the established gas turbine model,the dual off-design performance is studied,which is mainly based on the parameter of output and efficiency.The result shows that the efficiency and power output of gas turbines will decrease with the increase of ambient temperature.With the decrease of fuel calorific value,power output and efficiency will increase.As the load decreases,the efficiency of the gas turbines will decrease,and these changes are consistent with the single off-design performance.However,when the fuel and temperature change simultaneously,only adjusting the IGV angle cannot avoid the surge when the temperature is above 30°C.At this time,it is necessary to adjust the extraction rate in order to ensure the safe and stable operation of gas turbines.Therefore,the research on dual off-design performance of gas turbines has an important significance for the peak shaving operation of gas turbines.
