空气载能辐射末端应用试验研究

发布时间：2019-02-13 07:11

【摘要】：随着时代的发展,普通空调末端系统的技术已经非常的成熟,但是空气载能辐射末端系统还是很少被人们所了解的。空气载能辐射空调末端技术继承了传统辐射末端系统低能耗、高舒适性、噪声低的特点,并解决了传统辐射末端系统的施工复杂、维护难度高、容易结露等问题。空气载能辐射空调末端系统热舒适性问题是空气载能辐射空调系统设计中的关键部分,也可以作为设备选型的一项依据,基于热舒适性的节能性研究既能满足热舒适性要求,也能在最大程度上得到能耗节约。另外针对冬冷夏热地区的供暖问题进行了单独研究,为空气载能辐射末端系统可成为冬冷夏热地区冬季供热的选择之一提供实验依据。本文对湖南大学红叶楼一间办公室的空气载能辐射空调系统进行了现场测试,为空气载能辐射空调系统的热舒适性以及节能性提供了大量的宝贵的实测数据,另外对常德某药检所的空气载能辐射空调系统供暖研究,为冬冷夏热地区供暖问题的解决提供数据与分析方法,本文具体工作和结论如下:(1)通过对所选空调房间的空气温度、空气相对湿度、空气速度、平均辐射温度以及参与测试的人体衣着热阻和人体代谢进行实际测量和计算,并且利用Fanger教授所提出的热舒适评价指标PMV和PPD,得出了满足人体热舒适性要求的温度范围,并且将计算结果与真人综合调查研究进行对比核实,印证了所得结果的可靠性。结果表明在相同的热舒适性要求下,空气载能辐射末端系统相较于普通常用空调末端系统具有较为不错的节能效果,实验测得的最大节能率可达26.4%。(2)通过对常德药检所某天平室的顶板温度、墙壁温度、地面温度以及室内空气温度的测量,再结合各测试点的热流密度以及顶板内送、回风风速,并将测试数据与测试时间制成图表形式,以便于进行合理分析,结果表明送风区顶棚温度和回风区顶棚温度峰值较为同步,无明显相位差。通过顶板与地面之间的辐射换热能有效的提高地面温度,壁面也能保持较高的温度,且不同供热工况下,地面温度均高于室内空气平均预测温度,这表明在冬季供暖的过程中,与人体更加接近的地面具有一个较为舒适的温度。以上均可为空气载能辐射末端系统可成为冬冷夏热地区冬季供热的选择之一提供可靠依据。
[Abstract]:With the development of the times, the technology of air conditioning terminal system has been very mature, but the end system of airborne energy radiation is rarely known. The air borne radiation air conditioning terminal technology inherits the characteristics of low energy consumption, high comfort and low noise of the traditional radiation end system, and solves the problems of complex construction, high maintenance difficulty and easy condensation of the traditional radiation end system. The thermal comfort problem of the air energy carrying radiation air conditioning terminal system is a key part in the design of the air energy carrying radiation air conditioning system, and it can also be used as a basis for the selection of the equipment. The study of energy saving based on the thermal comfort can not only meet the requirements of the thermal comfort. Also can obtain energy consumption saving to the greatest extent. In addition, the heating problem in the area of cold winter and hot summer is studied separately, which provides the experimental basis for the end system of air energy transfer radiation to be one of the choices of heat supply in winter in the area of cold winter and hot summer. In this paper, the air energy carrying radiation air conditioning system in an office of Hongye Building, Hunan University, is tested on the spot, which provides a great deal of valuable measured data for the thermal comfort and energy saving of the air energy carrying radiation air conditioning system. In addition, the study on the heating of the air energy carrying radiation air conditioning system in a drug control institute in Changde provides data and analysis methods for solving the heating problems in the cold and hot areas in winter and summer. The specific work and conclusions of this paper are as follows: (1) the air temperature, air relative humidity, air velocity, average radiation temperature, thermal resistance and metabolism of human body were measured and calculated. The thermal comfort evaluation index PMV and PPD, proposed by Professor Fanger are used to obtain the temperature range to meet the requirements of human thermal comfort. The results are compared with the real person comprehensive investigation and verify the reliability of the obtained results. The results show that under the same thermal comfort requirement, the air energy carrying radiation terminal system has a better energy saving effect than that of the common air conditioning terminal system. The maximum energy saving rate measured by the experiment can be as high as 26.4um. (2) by measuring the roof temperature, wall temperature, floor temperature and indoor air temperature of a certain balance chamber of Changde Drug Control Institute, Combined with the heat flux of each test point and the wind speed of the inside roof and the return air, the test data and the test time are made into chart form, so that the reasonable analysis can be made. The results show that the peak value of roof temperature in the air supply area is more synchronous with that in the return air area, and there is no obvious phase difference. Through the radiant heat transfer between the roof and the ground, the temperature of the ground can be raised effectively, and the temperature of the wall can be kept high, and under different heating conditions, the ground temperature is higher than the average predicted temperature of indoor air, which indicates that in the process of heating in winter, The ground closer to the human body has a more comfortable temperature. All of the above can provide reliable basis for the selection of air energy carrying radiation terminal system as one of the winter heating options in cold winter and hot summer areas.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU831

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