耦合双循环制冷系统的开发及产品研制

发布时间：2018-02-27 21:39

本文关键词： 冰箱双循环耦合产品化　出处：《浙江大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着人民生活水平的提高,消费者购买冰箱的消费习惯逐渐发生改变,现在不仅关注冰箱的能耗,还对冰箱的形式、功能等提出了一些新要求。冰箱由简单的食品低温贮藏箱,向精确控温、大容量、多温区、节能环保、保质保鲜等高品质的方面发展。对于每一个冰箱厂家而言,要想更快占领市场,获得高额利润,研发、设计满足消费者需求的节能冰箱产品显得迫在眉睫。双压缩机双循环系统节能效果佳,温控精度高,发展潜力巨大。但是由于系统初始成本较高,而且采用的小型压缩机效率低,影响了循环效率,限制了其在市场上的应用。将冷变换器技术应用于双压缩机双循环系统中,提出了耦合双循环系统。新系统在保证温控精度的基础上,进一步提高了系统的性能系数,可以极大地推动双压缩机系统在市场上的应用。本文在前人的研究基础上研制了耦合双循环冰箱样机,并从理论分析、模拟计算以及实验测试等方面对冰箱样机进行了系统研究。详细研究成果如下:1.对双压缩机双循环系统和常规单循环冰箱系统进行了性能系数的理论分析和计算,结果表明双压缩机双循环系统比传统的单循环系统性能系数高,耦合双循环系统与普通双压缩机系统相比更具节能潜力;2.设计了冰箱的整体结构和布置方式,完成样机热负荷计算和系统的热力计算,并据此对样机的各部件进行了选型和设计,研制了耦合双循环系统冰箱样机;3.提出了一种适用于耦合双循环冰箱的温度及耦合运行控制策略,通过计算机模拟计算和实验测试的方式分析并验证了温度及耦合运行控制策略的控制效果,结果表明温度及耦合运行控制策略能够实现间室温度和系统耦合运行的协同控制;4.通过对两台典型样机的对比实验研究,分析了系统单独运行状态和耦合运行状态对冷藏子系统和冷冻子系统运行参数的影响;5.对样机进行了标准耗电量测试,得到耦合双循环冰箱样机的标准耗电量为1.15kW-h/24h,达到1级能效标准,耗电量明显低于间型号早循环系统冰箱。最后,简要阐述了已有研究工作中的不足之处和进一步研究的设想。
[Abstract]:With the improvement of people's living standards, consumers' consumption habits of buying refrigerators have gradually changed. Now they not only pay attention to the energy consumption of refrigerators, but also put forward some new requirements on the form and function of refrigerators. The refrigerators are made up of simple food cryogenic storage boxes. To precise temperature control, large capacity, multi-temperature area, energy conservation, environmental protection, quality preservation and other high-quality aspects. For every refrigerator manufacturer, want to occupy the market faster, obtain high profits, research and development, It is urgent to design energy-saving refrigerator products to meet the needs of consumers. The dual cycle system of double compressors has good energy-saving effect, high temperature control precision and great potential for development. However, due to the high initial cost of the system, Moreover, the low efficiency of the small compressor, which affects the circulation efficiency and limits its application in the market, applies the cold converter technology to the double cycle system of double compressors. A coupled double circulatory system is proposed. The new system can further improve the performance coefficient of the system on the basis of ensuring the precision of temperature control. It can greatly promote the application of double compressor system in the market. Based on the previous research, this paper developed a prototype of coupled double cycle refrigerator, and analyzed it theoretically. The prototype of the refrigerator is studied systematically in the aspects of simulation calculation and experimental test. The detailed research results are as follows: 1. The theoretical analysis and calculation of the performance coefficient of the double-cycle system of double compressor and the system of conventional single-cycle refrigerator are carried out. The results show that the performance coefficient of double cycle system of double compressor is higher than that of traditional single cycle system, and the energy saving potential of coupled double cycle system is higher than that of common double compressor system. 2. The whole structure and arrangement of refrigerator are designed. The thermal load calculation of the prototype and the thermodynamic calculation of the system are completed, and the various components of the prototype are selected and designed accordingly. A prototype of coupled double circulatory system refrigerator is developed. A control strategy of temperature and coupling operation for coupled double cycle refrigerator is proposed. The control effect of temperature and coupling operation control strategy is analyzed and verified by computer simulation and experimental test. The results show that the temperature and coupled operation control strategy can realize the cooperative control between the temperature of the interchamber and the coupled operation of the system. This paper analyzes the influence of the operating state of the system alone and the coupling operation state on the operating parameters of the refrigeration subsystem and the refrigeration subsystem. 5. The standard power consumption of the prototype is tested. The standard power consumption of the coupled dual-cycle refrigerator prototype is 1.15kW-h / 24h, which is up to the first grade energy efficiency standard, and the power consumption is obviously lower than that of the other type of early-cycle refrigerator. Finally, the shortcomings of the existing research work and the assumption of further research are briefly described.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TB657.4

【参考文献】