首页 馆藏资源 舆情信息 标准服务 科研活动 关于我们
现行 3936(RP-699)
收藏跟踪
购买正版
Model of an Ice-on-Pipe Brine Thermal Storage Component 冰上管式卤水蓄热元件模型
介绍了一种用于预测冰上管道盐水蓄热元件动态性能的模型和求解算法。管道上的冰盐水系统的独特之处在于,充放电都是从管道内部流动的盐水中进行的,因此,在一系列局部充放电循环中,管道外部可能会形成多层冰和液体。通过将蓄热单元视为逆流排列的管对集合,进行了分析。典型的管对在轴向上被数值划分为若干段,每个轴向段都考虑了一维径向传热。 因此,对于每个轴向截面的未知温度和冰液相边界,控制方程在时间变量上简化为一个耦合的非线性一阶系统。这些方程通过离散时间步进行数值积分,使用完全隐式格式生成一组非线性代数方程。提出了一种迭代程序来求解由此产生的代数方程,其中考虑了由于冰和液体层的形成或破坏而可能发生的构型变化。相关论文(Nelson等人,1996年)中描述了模型的验证。关键词:1996年,算法,计算,性能,储能,盐水,冰,热流,部件,冰蓄能引用: ASHRAE Trans。1996年,第102卷,第一部分,论文编号3936(RP-699),45-54,图9。,1表。,裁判。
Describes a model and solution algorithm developed to predict the dynamic performance of an ice-on-pipe brine thermal storage component. Ice-on-pipe brine systems are unique in that both charging and discharging occur from the brine flowing on the inside of the pipes, thus, multiple layers of ice and liquid could form on the outside of the pipes during a sequence of partial charge and discharge cycles. The analysis is developed by considering the thermal storage unit as a collection of tube pairs in a counterflow arrangement. A typical tube pair is numerically divided into a number of sections in the axial direction and one-dimensional, radial heat transfer is considered in each of these axial sections. The governing equations are thus reduced to a coupled, nonlinear, first-order system in the time variable for the unknown temperatures and ice-liquid phase boundaries in each axial section. These equations are numerically integrated over discrete time steps using a fully implicit scheme to produce a set of nonlinear algebraic equations. An iteration procedure is developed to solve the resulting algebraic equations in which possible configuration changes due to the formation or destruction of ice and liquid layers are considered. The validation of the model is described in a companion paper (Nelson et al. 1996).KEYWORDS: year 1996, algorithms, calculating, performance, energy storage, brine, ice, heat flow, components, ice storage
分类信息
关联关系
研制信息
相似标准/计划/法规