半导体制冷片的绝热补偿评测方法及系统的研究
发布时间：2018-10-16 17:32
【摘要】：随着科学技术的不断发展，人们对冷藏、冷冻技术的要求也不断提高，半导体制冷设备由于具有体积小、安装方便、绿色环保等优点得到了广泛应用。近些年来，各国学者对半导体制冷技术的研究也越来越深，但研究半导体制冷性能主要集中在半导体制冷的热力学、制冷材料和制冷片的控制方案等。对如何测量半导体制冷片制冷量和制冷效率的研究较少。 本论文对半导体制冷技术的基本原理及半导体制冷器的工作原理进行理论分析，为了研究半导体制冷片的制冷效率，本文对现有的半导体制冷片评估系统进行了改进，针对现有的半导体制冷片评估系统：评估效率低、评估系统误差大、测试过程繁杂的问题，，设计了一套基于MSP430F149单片机控制的绝热补偿半导体制冷片评估系统。系统采用Pt100铂金属电阻对制冷片冷端和热端的温度进行测量，检测精度和检测实时性都非常好。同时，为了降低系统稳态误差、减少干燥剂的更换频率、提高检测效率，加热片的功率调整采用模糊-PID算法实现。 评测过程中，系统将干燥的空气作为热交换介质，采用将加热片产生的热量补偿制冷片冷端从热交换器中吸收的热量，从而达到热交换器的进风口和出风口的温度不变；加热片和制冷片的冷端均被流动的空气所包围，大大降低了传统测量中，加热片向外界传热造成的制冷量计算不准确问题。该控制方法相对于传统的测量方法，有测量方法简单、检测时间短、测量精度高的优点。
[Abstract]:With the development of science and technology, the requirement of refrigeration and refrigeration technology has been raised. Semiconductor refrigeration equipment has been widely used because of its advantages of small size, convenient installation and green environmental protection. In recent years, the research of semiconductor refrigeration technology has been more and more in-depth, but the study of semiconductor refrigeration performance is mainly focused on the thermodynamics of semiconductor refrigeration, refrigeration materials and refrigeration film control schemes. There is little research on how to measure the cooling capacity and refrigeration efficiency of semiconductor refrigerators. In this paper, the basic principle of semiconductor refrigeration technology and the working principle of semiconductor cooler are analyzed theoretically. In order to study the refrigeration efficiency of semiconductor refrigeration sheet, the existing evaluation system of semiconductor refrigeration sheet is improved in this paper. Aiming at the problems of the existing evaluation system of semiconductor refrigeration sheet, such as low evaluation efficiency, large error of evaluation system and complicated testing process, a set of adiabatic compensation semiconductor refrigeration chip evaluation system based on MSP430F149 microcontroller is designed. The system uses Pt100 platinum resistor to measure the temperature at the cold and hot ends of the chiller, and the detection accuracy and real time are very good. At the same time, in order to reduce the steady-state error of the system, reduce the replacement frequency of the desiccant and improve the detection efficiency, the fuzzy-PID algorithm is used to adjust the power of the heating plate. In the evaluation process, the dry air is used as the heat exchange medium, and the heat produced by the heating sheet is used to compensate the heat absorbed from the heat exchanger at the cold end of the cooling plate, so that the temperature of the inlet and outlet of the heat exchanger is invariable. The cold end of the heating plate and the cooling plate are surrounded by the flowing air, which greatly reduces the inaccurate calculation of the refrigerating capacity caused by the heat transfer of the heating plate to the outside world in the traditional measurement. Compared with the traditional measurement method, this control method has the advantages of simple measurement method, short detection time and high measurement accuracy.
【学位授予单位】：湖南科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB657
本文编号：2275125
[Abstract]:With the development of science and technology, the requirement of refrigeration and refrigeration technology has been raised. Semiconductor refrigeration equipment has been widely used because of its advantages of small size, convenient installation and green environmental protection. In recent years, the research of semiconductor refrigeration technology has been more and more in-depth, but the study of semiconductor refrigeration performance is mainly focused on the thermodynamics of semiconductor refrigeration, refrigeration materials and refrigeration film control schemes. There is little research on how to measure the cooling capacity and refrigeration efficiency of semiconductor refrigerators. In this paper, the basic principle of semiconductor refrigeration technology and the working principle of semiconductor cooler are analyzed theoretically. In order to study the refrigeration efficiency of semiconductor refrigeration sheet, the existing evaluation system of semiconductor refrigeration sheet is improved in this paper. Aiming at the problems of the existing evaluation system of semiconductor refrigeration sheet, such as low evaluation efficiency, large error of evaluation system and complicated testing process, a set of adiabatic compensation semiconductor refrigeration chip evaluation system based on MSP430F149 microcontroller is designed. The system uses Pt100 platinum resistor to measure the temperature at the cold and hot ends of the chiller, and the detection accuracy and real time are very good. At the same time, in order to reduce the steady-state error of the system, reduce the replacement frequency of the desiccant and improve the detection efficiency, the fuzzy-PID algorithm is used to adjust the power of the heating plate. In the evaluation process, the dry air is used as the heat exchange medium, and the heat produced by the heating sheet is used to compensate the heat absorbed from the heat exchanger at the cold end of the cooling plate, so that the temperature of the inlet and outlet of the heat exchanger is invariable. The cold end of the heating plate and the cooling plate are surrounded by the flowing air, which greatly reduces the inaccurate calculation of the refrigerating capacity caused by the heat transfer of the heating plate to the outside world in the traditional measurement. Compared with the traditional measurement method, this control method has the advantages of simple measurement method, short detection time and high measurement accuracy.
【学位授予单位】：湖南科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB657
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