热管复合型环控机组用多功能壳管式换器设计与实验

发布时间：2018-01-23 01:57

本文关键词： 环控系统储液器多功能换热器能量调节设计　出处：《合肥工业大学》2014年硕士论文　论文类型：学位论文

【摘要】：针对蒸汽压缩/热管复合型环控机组的研发需要，基于小型化、系统安全可靠性和良好的能量调节特性为目标，设计了一种兼为冷凝蒸发器和储液器为一体的多功能壳管式换热器。多功能壳管式换热器管程为蒸发侧，由数个独立的制冷单元蒸发管簇组成，通过启停制冷单元的数量来调控热负荷的宽幅变化。壳程为冷凝侧，第二制冷工质在室内侧吸热蒸发后回到换热器，依次通过进口，均流板，蒸发管簇，被冷凝和过冷后储存在壳程下部，经屏蔽泵输送的用冷场所吸热。该换热器结构紧凑、换热稳定、工作可靠，依靠调节供液量和供液温度能快速响应被控对象热负荷变化。课题主要工作内容有：（1）收集分析国内外技术资料，根据用户需求及空调对象负荷特性，为热管复合型环控机组用多功能壳管式换热器设计提供依据；（2）根据热管复合型环控机组运行原理及控制需求，提出多功能壳管式换热器设计方案；进行60kw多功能壳管式换热器设计，并对60kw热管复合型实验平台进行设计；（3）进行实验机组平台搭建，对工程样件进行性能测试。课题取得阶段性成果：1）根据热管复合型环控机组运行控制理论，完成多功能壳管式换热器的设计，并试制了换热器样件；2）完成60kw热管复合型环控机组的实验平台设计，结合多功能壳管式换热器进行了实验平台的搭建；3）对多功能壳管式换热器进行性能实验，并结合整机对实验结果进行分析。实验表明多功能壳管式换热器满足了热力设计要求，换热性能良好，稳定性高，易于实现对热管循环中循环泵的精确控制，在压缩制冷模式下对冷量需求可以通过启停制冷单元数量来灵活控制，有利于机组节能。
[Abstract]:In order to meet the research and development needs of steam compression / heat pipe composite environmental control unit, it is based on miniaturization, system safety and reliability and good energy regulation characteristics. A kind of multifunctional shell and tube heat exchanger is designed, which is a condenser and a liquid storage unit. The tube side of the multi-function shell and tube heat exchanger is evaporative side, which is composed of several independent evaporative tube clusters of refrigeration units. The shell side is the condensation side, the second refrigerant returns to the heat exchanger after endothermic evaporation at the indoor side, and then through the inlet, the flow sharing plate, and the evaporative tube cluster. The heat exchanger is stored in the lower part of the shell after condensation and undercooling and absorbed heat in the cooling place transported by shield pump. The heat exchanger has compact structure stable heat transfer and reliable operation. By adjusting the amount of liquid supply and the temperature of liquid supply, we can quickly respond to the change of heat load of the controlled object. The main work of this paper is to collect and analyze the technical data at home and abroad, and to provide the basis for the design of multi-function shell and tube heat exchanger for heat pipe compound environmental control unit according to the demand of users and the load characteristics of air conditioning objects. 2) according to the operation principle and control requirement of heat pipe compound environmental control unit, the design scheme of multi-function shell tube heat exchanger is put forward. The 60kW multifunctional shell and tube heat exchanger is designed, and the 60kw heat pipe compound experimental platform is designed. The platform of the experimental unit is built and the performance of the engineering sample is tested. The subject has achieved the stage result: 1) according to the operation control theory of the heat pipe composite environmental control unit. The design of the multifunctional shell and tube heat exchanger is completed, and the sample of the heat exchanger is produced. 2) the experimental platform of 60kW heat pipe compound environmental control unit is designed, and the experimental platform is built in combination with multi-function shell tube heat exchanger. 3) the performance experiment of multifunctional shell-tube heat exchanger is carried out, and the experimental results are analyzed in combination with the whole machine. The experimental results show that the multi-function shell and tube heat exchanger meets the requirements of thermal design, has good heat transfer performance, high stability, and is easy to realize the accurate control of the circulating pump in the heat pipe cycle. In the compression refrigeration mode, the demand for cooling capacity can be flexibly controlled by the number of starting and stopping refrigeration units, which is beneficial to the energy saving of the unit.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB657.5

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