Prediction of Stored Heat and Optimum Operation in Temperature-stratified Thermal Storage Tank Consisting Several Tanks Connected in Series

多罐串联温度分层储热罐储热量预测及优化运行

• 批准号: 13650650
• 负责人: SAGARA Kazunobu
• 金额: $ 2.05万
• 依托单位: Osaka University (2003)Mie University (2001-2002)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650650/
• 关键词: Thermal storage; Temperature-stratification; Series connection; Optimum design; Operation; Temperature profile; Stored heat; Prediction

In this research project, a mixing characteristics under variable input condition was studied for a temperature-stratified thermal storage tank consisting several tanks connected in series and a prediction method of stored heat in tank was presented in order to realize the optimum operation of this thermal storage tank by using computer simulation.In the first year, an experimental set-up was prepared by connecting several divided water tanks in series and the basic mixing characteristics was studied under various input condition of constant flow rate and input temperature, and some mathematical models ware presented for the mixing characteristics, the connecting holes through tank partition and the inlet/outlet.In the second year, a control system was prepared and it can arbitrarily change flow rate and input temperature into thermal storage water tank by personal computer, and a mixing model which can be applied to the variable input condition was developed from experimental studies and was verified its prediction performance of transient temperature response and stored heat in tank by using measured data in an actual operated thermal storage system.In the last year, a series of experiment was conducted under the condition in which water input was restarted after interrupting once, and the mixing model for variable input condition was examined in the restart condition. And CFD simulation was conducted to study flow pattern in the storage tank.

本课题研究了由多个蓄热池串联而成的温度分层型蓄热池在变输入条件下的混合特性，提出了一种利用计算机模拟实现蓄热池最佳运行的蓄热预测方法。通过串联连接几个分开的水箱来制备实验装置并在恒定流速和输入温度的各种输入条件下研究基本混合特性，第二年研制了一套控制系统，通过微机控制，可任意改变蓄热水箱的流量和输入温度，通过实验研究，建立了适用于变输入条件的混合模型，并利用实际运行的蓄热系统的实测数据验证了该模型的瞬态温度响应和水箱蓄热量的预测性能。去年，在中断一次供水后重新开始供水的条件下进行了一系列实验，在再起动条件下，对变输入条件下的混合模型进行了检验。并对储罐内的流态进行了CFD模拟研究。

项目成果

H.Kitano, T.Iwata, K.Sagara: "Study on Modified Mixing Model of Temperature-Stratified Thermal Storage Tank under Variable Input Condition"Proc.of 9th International Conference on Thermal Energy Storage. Vol.I,. 15-20 (2003)

H.Kitano、T.Iwata、K.Sagara：“变输入条件下温度分层储罐的修正混合模型研究”第九届国际热能储存会议论文集。

H.Kitano, T.Iwata, K.Sagara: "Study on Modified Mixing Model of Temperature-Stratified Thermal Storage Tank under Variable Input Condition"Proc.of 9th International Conference on Thermal Energy Storage. Vol.I. 15-20 (2003)

H.Kitano、T.Iwata、K.Sagara：“变输入条件下温度分层储罐的修正混合模型研究”第九届国际热能储存会议论文集。