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现行 NO-94-17-3
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Development of Direct and Indirect Ice-Storage Models for Energy Analysis Calculations 用于能量分析计算的直接和间接冰蓄冷模型的开发
目前的冰蓄冷技术可分为两大类:直接冰蓄冷和间接冰蓄冷。直接冰蓄冷的特点是直接在蒸发器上产生冰,包括盘管式冰蓄冷系统和冰收割机。在这种系统中,蒸发器上冰的存在对蒸发器的性能有直接影响,必须将蓄冰装置建模为制冷循环的一个组成部分。间接冰蓄冷的特点是在偏远地区生产冰,包括冰容器系统和融化系统内的冰盘管。在这种系统中,盐水溶液在冷却器和冰存储装置之间循环。因此,制冷机和蓄冰装置可以分别建模。间接冰蓄冷装置可被视为热交换器,为这些系统开发的模型符合标准热交换器公式的逻辑。 描述了直接和间接冰蓄冷系统模型的发展,并讨论了其应用于能量分析计算的显著特征。所述模型已在建筑荷载分析和系统热力学(BLAST)能量分析程序中实现。介绍了冰蓄冷模型所采用的相关控制策略。讨论了将模型参数与制造商性能数据匹配的示例。关键词:储能、蓄冰、制冰机、蒸发器、性能、计算、制冷、计算机程序、冷却器、热交换器、直接冷却、间接冷却、压缩机、冷凝器。引用:研讨会,ASHRAE Trans。1994年,第100卷,第一部分
Current ice-storage technology can be separated into two-distinct categories - direct ice storage and indirect ice storage. Direct ice storage is characterised by production of ice directly on the evaporator and includes the ice-on-coil system and ice harvester. In such systems, the presence of ice on the evaporator has a direct influence on evaporator performance, and the ice-storage unit must be modelled as a component of the refrigeration cycle. Indirect ice storage is characterised by the production of ice at a remote location and includes ice container systems and ice-on-coil inside-melt systems. In such systems, a brine solution is circulated between a chiller and the ice storage unit. As a result, the chiller and the ice-storage unit can each be modelled separately. The indirect ice-storage unit can be thought of as a heat exchanger, and the model developed for these systems follows logically from a standard heat exchanger formulation. Describes the development of models for both direct and indirect ice-storage systems and discusses their salient features as applied to energy analysis calculations. The models described have been implemented in the Building Loads Analysis and System Thermodynamics (BLAST) energy analysis program. Relevant control strategies used by the ice-storage models are presented. An example of matching the model parameters to the manufacturers' performance data is discussed.KEYWORDS: energy storage, ice storage, ice makers, evaporators, performance, calculating, refrigeration, computer programs, chillers, heat exchangers, direct cooling, indirect cooling, compressors, condensers.
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