动态冰浆制造系统的制冰和蓄冰特性研究

GIEC OpenIR > 中国科学院广州能源研究所

	动态冰浆制造系统的制冰和蓄冰特性研究
其他题名	Study on Ice Generation and Ice Storage Characteristics of the Dynamic Ice Slurry Making System
	张海潮
导师	冯自平
	2009-05-27
学位授予单位	中国科学院广州能源研究所
学位授予地点	广州能源研究所
学位名称	硕士
关键词	冰蓄冷冰浆传热特性制冰特性温度分布
摘要	蓄冷作为主要蓄能技术应用方式之一，应用于空调系统可移峰填谷，平衡电力负荷，是电力负荷管理策略的一项重要技术手段。使用冰浆作为蓄冷介质，载冷密度高达334kJ kg-1（0℃时发生液-固相变）；蓄冷释冷过程中热传递效率高，具有较好的流动性，可以使用管道输送；可适用于食品冷冻冷藏、化学工艺、空调、区域供冷等不同的场合。因此，对冰浆制造系统的研究就显的十分重要。本文对自行研制的刮刀式动态冰浆制造系统进行较为全面的实验研究。主要研究内容如下：介绍了冰蓄冷空调的研究背景，对近年来的相关文献特别是刮刀式冰蓄冷空调的相关文献进行了综述，指出了本课题的研究意义与研究内容。依据实验方案，对刮刀式冰浆发生器的传热特性进行了说明。采用两种不同理论，即把冰浆看作单相流体和两相流体对8组实验结果进行分析，冰浆发生器传热系数的平均值达到1050W m-2 K-1，并对冰浆发生器的能耗进行了简要分析。在不同的实验方案下蓄冰槽内的温度分布特性具有良好的重复性。实验表明：在潜热蓄冷阶段，蓄冰槽中间层温度最低，上层温度最高，底层温度开始与上层温度接近，之后不断下降与中间层温度接近。详细分析刮刀式动态冰浆制造系统在不同实验方案下的制冰特性。实验结果表明：制冷量在进入潜热换热阶段时出现一个峰值，之后衰减并保持稳定，整个潜热蓄冷阶段制冷量是额定空调工况的65%。系统制冰速度保持在335kg h-1。与直膨式冰蓄冷空调相比，系统相对COP最大提高16%，单位制冷量的制冰速度最大提高45%，单位能耗的产冰量最大提高72%，节能率都保持在40%左右。通过本课题的实验研究，得到了刮刀式动态冰浆制造系统的制冰和蓄冰特性，为刮刀式冰蓄冷空调的进一步开发提供基础数据和设计指导。
其他摘要	Cool storage, as one of the main energy storage technologies, is applied for shifting on-peak electric load to off-peak and balancing the electric-load of the air-condition system. Thus, it is regarded as an important method towards electric-load management strategy. Using ice slurry as a cool storage medium can realize a high heat transfer efficient during the cold releasing &cold storage process. Moreover, the ice slurry can be transported by pipelines because of its good fluidity, so it can be used in different occasions, such as food freezing and cold storage, chemical technology, air conditioning, district cooling and so on. Therefore, it becomes a significant thing to study the dynamic ice slurry making system. In this paper a general experimental study on the scraped dynamic ice slurry making system was conducted. The main contents are as follows: In the paper a brief introduction to the background of the ice-storage air conditioning was given, and the recent years’ related literature upon the ice-storage air conditioning especially the scraped dynamic ice slurry making system were summarized. And the significance and the research content of this paper are stated. Based on the experimental scheme, heat transfer characteristics of the ice slurry generator scraped surface are introduced. By considering the ice slurry as single-phase fluid and two-phase fluid separately, eight groups of measured results were analyzed. The result show that the heat transfer coefficient of the ice slurry generator is up to 1050W m-2 K-1. And a brief analysis on the power consumption was given. The temperature distribution characteristics of the ice storage tank under the different experimental conditions were introduced, and the experimental results show that the repeatability of experimental results is rather good during the latent heat storage process: in the ice-storage tank, the central temperature is lowest, the top temperature is highest, and the bottom temperature is closed to the top firstly and then felled to the central. The ice generating performance of the dynamic ice slurry making system under different experimental conditions was introduced. The cooling capacity appears a peak when the solution enters the latent heat exchange stage completely and then it remains stable after the decay. In the whole latent heat exchange stage, the cooling capacity is up to 65% of the rated condition. And the ice making rate remains at 335kg h-1. Comparing to the direct evaporative internal-melt ice-storage system, the relative COP improves 16%, ice making rate per unit refrigerating improves 45%, the volume of ice output per unit energy consumption improves 72%, and the energy saving remains 40%. Through our experimental study, the ice generation and ice storage characteristics of the dynamic ice slurry making system were obtained, which could be provided instructions for the further product research and development.
页数	68
语种	中文
文献类型	学位论文
条目标识符	http://ir.giec.ac.cn/handle/344007/5862
专题	中国科学院广州能源研究所
推荐引用方式 GB/T 7714	张海潮. 动态冰浆制造系统的制冰和蓄冰特性研究[D]. 广州能源研究所. 中国科学院广州能源研究所,2009.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
200628014924018张海潮_p（2533KB）			开放获取	--	浏览下载