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首页> 外文会议>Ammonia refrigerating systems, renewal and improvement >Limited Charge Shell and Tube Ammonia Spray Evaporator with EnhancedTubes for Thermal Storage System
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Limited Charge Shell and Tube Ammonia Spray Evaporator with EnhancedTubes for Thermal Storage System

机译：带增强管的限注壳管式氨喷雾蒸发器，用于蓄热系统

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摘要

A low charge ammonia spray evaporator was designed for a process cooling application at arnchemical plant. At off-peak hours the chilled water is stored in a 2,500 m3 insulated tank that is partrnof a thermal storage system to reduce peak demand. With the existing chillers the waterrntemperature was at its best never lower than 4.4℃. Therefore, the minimum storage tankrntemperature achieved was between 5.6-7.2℃.rnDesign requirement was to cool water to 2.2℃ without risking tube freeze-up. To meet thisrnrequirement a shell and tube spray evaporator was proposed, designed and fabricated. Doublyrnenhanced carbon steel tubes were employed. Field results showed good correlation with the designrncriterion. Spray evaporators work effectively if the feed ratio is appropriate and that no section ofrnthe bundle is starved of liquid refrigerant. With this in mind appropriate refrigerant distributionrnsystem was designed. A comparative study is presented here to show various aspects of sprayrnevaporator versus a flooded evaporator of equal capacity. Field results showed exceptionalrnperformance under different seasonal conditions. Water outlet temperature as low as 0.6℃ has beenrnrecorded and there are confirmed reports of storage tank temperature as low as 1.7℃.
机译：低荷氨喷雾蒸发器设计用于在arnchemical工厂进行过程冷却。在非高峰时段，将冷冻水存储在2500立方米的保温水箱中，该保温水箱与热存储系统分开，以减少高峰需求。使用现有的冷水机，其最高水温永远不会低于4.4℃。因此，所达到的最低储罐温度在5.6-7.2℃之间。设计要求是将水冷却到2.2℃，而不会冒管子冻结的风险。为了满足这一要求，提出，设计和制造了壳管式喷雾蒸发器。使用双加强碳钢管。现场结果表明与设计标准具有良好的相关性。如果进料比合适，并且束中无液体致冷剂不足，喷雾蒸发器将有效工作。考虑到这一点，设计了适当的制冷剂分配系统。此处进行了一项比较研究，以显示喷雾蒸发器与同等容量的满液蒸发器的各个方面。田间试验结果表明，在不同的季节条件下，其性能都很高。已经记录了出水温度低至0.6℃，并且已经确认了储罐温度低至1.7℃的报道。

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  • 会议地点 Ohrid(MK)
  • 作者

    Z. H. Ayub; M.-C. Chyu; A. H. Ayub;

  • 作者单位

    Isotherm, Inc., 7401 Commercial Blvd., East Arlington, Texas 76001, USA Fax: 817-472-5878 e-mail: zahid@iso-therm.com;

    rnDepartment of Mechanical Engineering, Texas Tech University Lubbock, Texas 79409, USA;

    rnRose-Hulman Institute of Technology, Mechanical Engineering Department 5500 Wabash Ave, Terra Haute, IN 47803, USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 制冷工程;
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