槽式太阳能集热器与燃气锅炉联合供暖系统模拟研究

发布时间：2018-02-27 18:38

本文关键词： 严寒地区太阳能供暖槽式太阳能集热器燃气锅炉模拟研究系统优化　出处：《哈尔滨工业大学》2014年硕士论文　论文类型：学位论文

【摘要】：能源资源日益匮乏与生态环境急剧恶化已经成为人类社会可持续发展的严峻挑战，新能源与可再生能源的开发与应用将是解决能源与环境问题的关键措施。太阳能作为一种清洁无污染的可再生能源，日益受到人们的广泛重视；特别是我国严寒及寒冷地区，太阳能采暖对减少常规能源消耗和缓解空气污染具有显著意义，将为地区的节能和环保工作做出重要贡献。本文提出了一种槽式太阳能集热器与燃气锅炉相结合的新型供暖系统，解决了传统太阳能集热器在寒区应用时热损大、效率低、难防冻、易堵塞、易爆管等问题；本文以严寒地区为例对该新型供暖系统的运行特性进行详细的模拟研究，并通过各部件以及相关控制措施的优化实现系统最大的节能效益与经济效益。首先，详细阐述了槽式太阳能集热器与燃气锅炉联合供暖系统的工作原理，，以哈尔滨河柏小区某栋节能改造后的住宅建筑为例，对供暖系统各部件进行了计算选型，包括太阳能集热系统、建筑供暖系统以及各换热设备的详细设计与安装分析；同时，提出了多种运行模式和相应的控制策略，使系统运行更加合理。其次，基于热力学基本定律以及相关数理知识，对系统各部件建立了准确的数学模型，利用MATLAB软件编程模拟分析了系统在哈尔滨典型气象年采暖季的运行特性。深入研究了建筑负荷与有效得热量关系、集热效率、系统太阳能保证率、蓄热水箱温度、各模式运行时间、系统供热量及其能耗与经济性等内容，对系统的整体运行性能进行了综合评估。最后，从集热器面积、蓄热水箱容积、系统运行控制三个方面对系统进行了优化，进一步提升系统性能；经整体优化之后，系统的太阳能保证率得到明显提升，节能与经济效益更加显著。本课题属于“十二五”国家科技支撑计划项目课题《典型气候区既有居住建筑绿色化改造技术研究与工程示范》（NO.2012BAJ06B02）的部分内容。
[Abstract]:The shortage of energy resources and the rapid deterioration of ecological environment have become a severe challenge to the sustainable development of human society. The development and application of new and renewable energy will be the key measures to solve the problem of energy and environment. As a clean and pollution-free renewable energy, solar energy has been paid more and more attention, especially in cold and cold regions of China. Solar heating has a significant effect on reducing the consumption of conventional energy and alleviating air pollution and will make important contributions to the work of energy saving and environmental protection in the region. In this paper, a new type of heating system combining trough solar collector with gas boiler is put forward, which solves the problems of large heat loss, low efficiency, difficult freezing resistance, easy clogging and explosive tube when the traditional solar energy collector is applied in cold region. In this paper, the operation characteristics of the new heating system are simulated and studied in detail, and the maximum energy saving benefit and economic benefit of the system are realized through the optimization of each component and related control measures. First of all, the working principle of the combined heating system of trough solar collector and gas-fired boiler is expounded in detail. Taking an energy-saving residential building in Harbin River Park District as an example, the heating system components are calculated and selected. It includes the detailed design and installation analysis of solar energy collector system, building heating system and each heat exchanger. At the same time, various operation modes and corresponding control strategies are put forward to make the system run more reasonably. Secondly, based on the basic laws of thermodynamics and related mathematical knowledge, an accurate mathematical model is established for each component of the system. The operating characteristics of the system in typical meteorological annual heating season in Harbin are simulated and analyzed by using MATLAB software. The relationship between building load and effective heat, heat collection efficiency, system solar energy guarantee rate, temperature of heat storage tank are deeply studied. The overall performance of the system is comprehensively evaluated by the operation time of each mode, the heat supply of the system and the energy consumption and economy of the system. Finally, the system is optimized from three aspects of collector area, storage tank volume and system operation control, and the system performance is further improved. After the overall optimization, the solar energy guarantee rate of the system is obviously improved. Energy conservation and economic benefits are more significant. This subject belongs to the part of the "12th Five-Year" National Science and Technology support Program project "Research and Engineering demonstration of Green Transformation of existing Residential buildings in typical Climate area" (no. 2012BAJ06B02).
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU832

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