基于TRNSYS的太阳能耦合土壤源热泵系统仿真研究
发布时间：2018-08-25 13:38
【摘要】：随着世界经济快速发展,能源紧缺和环境恶化已成为全球性问题,各领域越来越重视对可再生能源的开发利用。一些热泵系统,如太阳能热泵、地源热泵、空气源热泵已经得到一些应用,但在应用过程中因自身的一些局限性使其发展受到一定的限制。如果能结合两种能源的优势使得他们可以弥补各自的缺陷,势必会扩大其应用范围。太阳能耦合土壤源热泵系统就是一种既能利用土壤源来克服太阳能的间歇性,又可利用太阳能起到缓解土壤温度的恢复压力,具有广阔的发展前景。 本文针对太阳能耦合土壤源热泵系统进行研究,并对系统中的各个部件建立数学模型,通过TRNSYS软件建立仿真模型,收集实际案例中系统在夏季及过渡季节和冬季的运行数据,与模拟所得数据进行分析对比,验证仿真模型的正确性。 在仿真模型的基础上,改变实际案例中太阳能耦合土壤源热泵系统的运行模式进行瞬态数值模拟,对比分析了不同运行模式下系统的运行特性。通过分析可知：在夏季及过渡季中整个系统只在白天运行,太阳能系统采用动态运行模式；在冬季在气温较低的月份中(12月份、1月份和2月份)太阳能系统采用动态运行模式,而其余的采暖期间采用静态运行模式,对于静态运行模式中时间段的选择应是尽早将热量补充到系统中较合理。 在仿真模型的基础上,改变实际案例中太阳能耦合土壤源热泵系统的连接方式,对比分析了不同连接方式的系统全年运行特性。通过分析可知：对于太阳能补热点的位置设置在热泵机组的出口和地埋管入口之间和太阳能补热点位置设置在地埋管的出口和热泵机组的入口之间两种连接方式,前者系统的性能要优于后者。 本文在太阳能耦合土壤源热泵系统实地调研的基础上,结合仿真模型对其运行模式和连接方式进行了分析研究,为今后太阳能耦合土壤源热泵系统在设计与应用提供理论参考。
[Abstract]:With the rapid development of world economy, energy shortage and environmental deterioration have become a global problem, and more attention has been paid to the development and utilization of renewable energy in various fields. Some heat pump systems, such as solar heat pump, ground-source heat pump and air-source heat pump, have been applied, but their development is limited due to their limitations. If the combination of the advantages of the two sources of energy so that they can make up for their shortcomings, it will expand its scope of application. The solar-coupled ground-source heat pump system is a kind of ground-source heat pump system, which can not only use soil source to overcome the intermittence of solar energy, but also use solar energy to relieve the recovery pressure of soil temperature. In this paper, the solar-energy coupled ground-source heat pump system is studied, and the mathematical model of each component of the system is established. The simulation model is established by TRNSYS software, and the operation data of the system in summer, transitional season and winter are collected in practical cases. Compared with the simulated data, the correctness of the simulation model is verified. On the basis of the simulation model, the transient numerical simulation of the solar-coupled ground-source heat pump system is carried out by changing the operating mode of the actual case, and the operating characteristics of the system under different operating modes are compared and analyzed. Through the analysis, we can know that the whole system only operates in the daytime in summer and transition season, and the solar system adopts dynamic operation mode in winter in the months with low temperature (January and February in December). The rest of the heating period uses static operation mode, for the static mode of the selection of time should be as early as possible to add heat to the system more reasonable. Based on the simulation model, this paper changes the connection mode of solar coupled ground source heat pump system in practical cases, and compares and analyzes the year-round operation characteristics of the system with different connection modes. Through the analysis, we can know that the position of solar compensation hot spot is set between the outlet of heat pump unit and the entrance of underground pipe, and the position of hot spot of solar energy compensation is set between the outlet of underground tube and the entrance of heat pump unit. The performance of the former system is better than that of the latter. On the basis of the field investigation of the solar-coupled ground-source heat pump system and the simulation model, this paper analyzes and studies its operation mode and connection mode, which provides a theoretical reference for the design and application of the solar-energy coupled ground-source heat pump system in the future.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU83
本文编号：2203037
[Abstract]:With the rapid development of world economy, energy shortage and environmental deterioration have become a global problem, and more attention has been paid to the development and utilization of renewable energy in various fields. Some heat pump systems, such as solar heat pump, ground-source heat pump and air-source heat pump, have been applied, but their development is limited due to their limitations. If the combination of the advantages of the two sources of energy so that they can make up for their shortcomings, it will expand its scope of application. The solar-coupled ground-source heat pump system is a kind of ground-source heat pump system, which can not only use soil source to overcome the intermittence of solar energy, but also use solar energy to relieve the recovery pressure of soil temperature. In this paper, the solar-energy coupled ground-source heat pump system is studied, and the mathematical model of each component of the system is established. The simulation model is established by TRNSYS software, and the operation data of the system in summer, transitional season and winter are collected in practical cases. Compared with the simulated data, the correctness of the simulation model is verified. On the basis of the simulation model, the transient numerical simulation of the solar-coupled ground-source heat pump system is carried out by changing the operating mode of the actual case, and the operating characteristics of the system under different operating modes are compared and analyzed. Through the analysis, we can know that the whole system only operates in the daytime in summer and transition season, and the solar system adopts dynamic operation mode in winter in the months with low temperature (January and February in December). The rest of the heating period uses static operation mode, for the static mode of the selection of time should be as early as possible to add heat to the system more reasonable. Based on the simulation model, this paper changes the connection mode of solar coupled ground source heat pump system in practical cases, and compares and analyzes the year-round operation characteristics of the system with different connection modes. Through the analysis, we can know that the position of solar compensation hot spot is set between the outlet of heat pump unit and the entrance of underground pipe, and the position of hot spot of solar energy compensation is set between the outlet of underground tube and the entrance of heat pump unit. The performance of the former system is better than that of the latter. On the basis of the field investigation of the solar-coupled ground-source heat pump system and the simulation model, this paper analyzes and studies its operation mode and connection mode, which provides a theoretical reference for the design and application of the solar-energy coupled ground-source heat pump system in the future.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU83
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，本文编号：2203037
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