干式带腔地板采暖系统的实验测试与模拟优化

发布时间：2018-05-03 18:31

  本文选题：干式带腔单元体 + 供热工况　； 参考：《沈阳建筑大学》2014年硕士论文

【摘要】：由于工业的飞速发展,使得其他采暖设备性能得到提高,价格不断降低,而且地板采暖系统本身存在施工和维修困难等缺点,使得地板采暖的发展受到了前所未有的挑战。作为一种新型舒适、节能的采暖方式,干式带腔地板采暖系统采用预制工艺,施工方便,近年来得到了广泛的应用。本文主要利用理论分析、实验测试、模拟分析等手段进行干式带腔地板辐射采暖系统的模块单元的设计、热工性能分析、机理分析,传热性能模拟与优化研究、进而形成干式带腔地板采暖系统工艺设计及技术规程,使室内环境的能耗需求更加符合社会节能标准的要求,对实现建筑节能和室内舒适性提高具有一定的指导作用。在空腔和覆面层共同作用下,干式带腔地板辐射采暖系统具有温度场均匀、节能等特点。本文首先搭建了干式带腔地板辐射采暖系统实验房间,利用铜-康铜热电偶对不同供热工况下房间温度场分布进行测试,研究了不同供水温度和供水流量条件下,地板表面温度分布的情况；并对3种不同敷设方式下地板表面的温度分布进行对比。结果表明：地板下铺设有覆面层的方式,地板表面温度的温度分布均匀。供水温度在40℃时,供水流量为0.34m3/h时,室内工作区的温度稳定在20℃,地板表面平均温度可以控制在24℃～26℃满足人们日常舒适性需求。进一步地,利用FLUENT软件,本文建立并完善了干式带腔地板辐射供暖系统的CFD数值计算模型,分析供回水温度变化时地板表面平均温度,并与实验测得的数据进行对比,验证模型的正确性。利用验证后的模型,模拟分析不同的地板材料、覆盖导热层材料、盘管间距对地板表面温度的影响。结果表明：所建立的CFD数值计算模型与计算方法是可行的。地板材料导热系数越大,地表温度分布越均匀,但相对温度越低；覆盖导热层的导热系数越大,地板温度越均匀,但是向地板体下部散失的热量也越多；盘管间距越大,干式带腔地板辐射供暖系统地板表面温度相对越低,间距对本系统的影响不可忽视。本文从供热工况、单元结构、室内温度分布及经济性等几方面地对干式带腔地板辐射供暖进行了实验、模拟和评价,提出合理节能的供热工况,并对单元材料的影响规律进行了分析研究,进而对如何发挥其节能、环保的优势具有指导意义。理论和试验研究表明,干式带腔地板辐射供暖系统具有节能、舒适、经济等特点,有很好的市场发展潜力。
[Abstract]:Because of the rapid development of industry, the performance of other heating equipment has been improved, the price has been reduced, and the floor heating system itself has some shortcomings, such as construction and maintenance difficulties, so the development of floor heating has been faced with unprecedented challenges. As a new type of comfortable and energy-saving heating system, the dry-type floor heating system with cavity adopts prefabricated technology, which is easy to construct and has been widely used in recent years. In this paper, the design of module unit, thermal performance analysis, mechanism analysis, heat transfer performance simulation and optimization research of dry-type floor radiant heating system with cavity are mainly carried out by means of theoretical analysis, experimental test and simulation analysis. Then the dry type floor heating system with cavity is designed and the technical specification is formed to make the energy consumption requirement of indoor environment more in line with the requirements of social energy saving standards. It has a certain guiding role to realize building energy saving and indoor comfort improvement. Under the joint action of cavity and overlay, the dry floor radiant heating system with cavity has the characteristics of uniform temperature field and energy saving. In this paper, the experimental room of dry floor radiant heating system with cavity is built firstly. The temperature field distribution of the room under different heating conditions is measured by using copper-constant-copper thermocouple, and the conditions of different water supply temperature and water flow rate are studied. The temperature distribution of the floor surface was compared with that of the three different laying methods. The results show that the temperature distribution of the floor surface temperature is uniform. When the water supply temperature is 40 鈩，

本文编号：1839607