多功能热泵性能测试系统的研制

发布时间：2018-04-21 23:00

本文选题：热泵 + 性能测试　；参考：《杭州电子科技大学》2013年硕士论文

【摘要】：随着人们对热泵技术的深入研究和热泵项目的大力推广应用，热泵系统的性能指标越来越受到科研技术人员、政府主管部门的关注。为了对热泵系统的性能指标进行准确定量的描述，需要研制一套符合国家标准和行业特点的测试系统。现有的大多数热泵测试系统以载冷剂法为测试基础，测试结果虽然能体现热泵性能的相关指标，但从热泵系统性能被准确分析的目标出发，科研人员更注重以制冷剂焓差为测试基础的制冷剂液体流量法所测得的结果；另外由于热泵系统控制性能的优劣直接影响其性能和运行费用的高低，急需在以热力学测试为主的平台中设计并增加控制算法验证平台，以支持热泵控制性能的测试。针对目前测试系统缺乏校核和控制性能测试等不足，本课题设计一种具有以下特点的系统：支持上述两种热力学测试方法相结合，且互为校核的试验系统；支持热泵控制性能测试，完成控制算法的验证。支持多工况测试，通过单次试验可获得多类试验参数，同时满足性能测试和科研需求的目的，，为被测热泵系统在不同控制算法下的性能测试提供平台，提高了对热泵性能测试的全面性和科学性。基于上述思想与目标，文章主要做了如下研究和设计工作：第一，提出能进行常规性能测试、校核性能测试和控制性能测试的综合测试平台方案，分析热力学性能测试中的方法，并据此进行被测热泵系统和工况系统中各部件的选型设计，搭建测试台，分析系统中重要的测控参数。第二，为提高自动化程度，设计计算机测控系统。设计RS-485通信网络、电气控制系统，并结合各测控点分析进行传感器、仪器仪表和执行器的选型设计。第三，在测控系统基础上完成软件系统设计。在软件需求分析和总体设计之后，采用C#语言和SQL Server数据库技术，结合面向对象的设计思想，使用UML方法分析和设计各模块，包括数据采集处理、存储显示、稳定判断等重要模块。第四，提高系统扩展性和灵活性。用专业热物理性质方程组进行数值计算，提高了精度，生成动态链接库，通过配置，实现制冷剂灵活更换；支持控制算法验证模块的扩展和灵活替换，提供了两种设计思路：C#生成动态链接库；MATLAB生成动态链接库以实现与C#的混合编程。第五，对系统的软硬件进行调试；进行实际性能测试，对系统做了热平衡性分析，实际运行结果表明其性能稳定、运行可靠，具有一定的实用价值。
[Abstract]:With the deep research of heat pump technology and the popularization and application of heat pump project, the performance index of heat pump system has been paid more and more attention by researchers and government departments. In order to describe the performance index of heat pump system accurately and quantitatively, a set of test system which accords with the national standard and the characteristics of the industry should be developed. Most of the existing heat pump test systems are based on the refrigerant method. Although the test results can reflect the related indexes of the heat pump performance, it starts from the objective that the heat pump system performance is accurately analyzed. Researchers pay more attention to the results obtained by the refrigerant liquid flow method based on the refrigerant enthalpy difference. In addition, the control performance of the heat pump system has a direct impact on its performance and operating cost. In order to support the testing of heat pump control performance, it is urgent to design and add the verification platform of control algorithm in the platform based on thermodynamics test. In view of the lack of checking and control performance testing of the current test system, this paper designs a system with the following characteristics: supporting the combination of the two thermodynamics testing methods, and checking each other; Support heat pump control performance testing, complete the verification of the control algorithm. In order to support multi-condition test, multi-type test parameters can be obtained by single test, and the purpose of performance test and scientific research is met, which provides a platform for the performance test of the tested heat pump system under different control algorithms. The test of heat pump performance is comprehensive and scientific. Based on the above ideas and objectives, this paper mainly does the following research and design work: Firstly, a comprehensive test platform for conventional performance test, check performance test and control performance test is proposed, and the methods in thermodynamic performance test are analyzed. Based on this, the selection and design of the components in the system and the operating system are carried out, the test bench is built, and the important measurement and control parameters in the system are analyzed. Second, in order to improve the degree of automation, the design of computer measurement and control system. Design RS-485 communication network, electrical control system, and combined with the analysis of the measurement and control points for sensor, instrument and actuator type selection design. Thirdly, the software system is designed on the basis of measurement and control system. After software requirement analysis and overall design, using C # language and SQL Server database technology, combined with object-oriented design idea, using UML method to analyze and design each module, including data acquisition and processing, storage and display, Stability judgment and other important modules. Fourth, improve system expansibility and flexibility. The numerical calculation is carried out with the professional thermophysical property equations, which improves the accuracy, generates the dynamic link library, realizes the flexible replacement of refrigerant through configuration, supports the expansion and flexible replacement of the verification module of the control algorithm, In this paper, two kinds of design ideas are provided, namely: C # generating dynamic link library and MATLAB generating dynamic link library to realize mixed programming with C #. Fifthly, debugging the software and hardware of the system, testing the actual performance, analyzing the thermal balance of the system, the actual operation results show that its performance is stable, reliable, and has certain practical value.
【学位授予单位】：杭州电子科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU83;TP274

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