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Study on the Optimun Operation of High Performance Cold Thermal Storage System Using Liquid Ice

高性能液态冰蓄冷系统优化运行研究

基本信息

批准号：
06555057
负责人：
FUKUSAKO Shoichiro
金额：
$ 5.12万
依托单位：
HOKKAIDO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06555057/
关键词：
Ice thermal storage Liquid-ice Transport of cold thermal energy Slurry Two-phase flow Melting Energy saving Slush ice 氷蓄冷媒スラッシュ相蓄冷熱氷蓄熱強制対流環境保護電力需要平準化採冷熱冷熱搬送電用需要平準化

项目摘要

1. Design and construction of the compact scale liquid-ice thermal storage systemA design and construction of the compact scale thermal storage system for home-use have been carried out to determine the optimum operation mode of the system. The experimental system consists mainly of production and storage unit, transporting loop, and consumption unit of the liquid ice. Production and storage unit of the liquid ice consists of refrigerator, evaporator, and storage tank. The evaporator was installed in the storage tank with its surface being coated with polyolefin tube. Liquid ice was produced by cooling aqueous binary solution in the tank. Liquid ice, which was produced in the tank, is derived to the thermal load unit by the circulating pump through the piping system with 20m long, and then returns to storage tank after its cold energy consumed. In the kexperiment, a variety of operation modes of the system, namely the combination of the time of production, storage, and consumption of the liquid ice, were set as the test parameters. Then the measurements of power-input of the refrigerator, thermal load, and ice-packing factor were carried out, and then the optimum operation mode was determined.2. RESULTS AND REMARKS(1) In the heat release operation mode, both the exit air temperature and released heat were kept almost constant until the ice particles in the liquid-ice finish to melt. Furthermore, after the ice particles in the liquid-ice has melt, cooling capacity remains enough to keep the operation by the sensible heat of aqueous solution.(2) Long-time opration in the production mode produces much more ice packing factor, while it reduces the temperature of the liquid-ice yielding the reduction of the performance of the refrigerator. Therefore, by taking all the factors, namely, power input to the refrigerator, cooling capacity, efficiency o heat-release mode, into the account, the optimum operation mode in the present study has been determined.

1.紧凑型液冰蓄冷系统的设计与建造本文对家用紧凑型液冰蓄冷系统进行了设计与建造，以确定系统的最佳运行方式。该实验系统主要由液态冰的生产与储存单元、输送回路和消耗单元组成。一种液态冰的生产和储存装置，包括制冷机、蒸发器和储存罐。蒸发器安装在储罐中，其表面涂有聚烯烃管。液态冰是通过在槽中冷却二元水溶液而产生的。储罐内产生的液态冰通过20 m长的管道系统由循环泵引至热负荷单元，消耗冷量后返回储罐。在实验中，系统的多种操作模式，即液态冰的生产时间、储存时间和消耗时间的组合被设置为测试参数。通过对制冷机的功率输入、热负荷和冰填充系数的测试，确定了最佳运行模式.结果与评价（1）在放热运行模式下，出口空气温度和放热几乎保持恒定，直到液冰中的冰粒完全融化。此外，在液态冰中的冰粒融化后，冷却能力仍然足以通过水溶液的显热来保持操作。(2)生产模式下长时间的运行会使蓄冰系数增大，同时也会降低液态冰的温度，从而降低制冷机的性能。因此，综合考虑制冷机输入功率、制冷量、放热效率和放热方式等因素，确定了本研究中的最佳运行方式。