多孔太阳墙采暖房性能研究

发布时间：2018-01-05 10:46

本文关键词：多孔太阳墙采暖房性能研究　出处：《华中科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：太阳房是一种新型的太阳能采暖技术，它能够做到高效采暖、有效通风，对节约常规能源，减少环境污染，改善生态平衡具有重要的意义。本文首先介绍了多孔太阳墙系统的原理、特点及国内外应用实例，其中集热蓄热墙式太阳房具有蓄热功能，因此应用最为广泛。本文所建多孔太阳墙采暖房采用了多孔陶瓷作为集热蓄热墙的材料并安装了变频风机和回风管，具有太阳能利用效率高、可自主调节通风与采暖比例、采光度好、舒适度高的优势。根据所建太阳房的实验研究，结果表明室内温度场较为均匀，受天气状况及太阳辐射强度影响较大，在晴天无云层且环境温度较低的情况下可达到最佳的采暖性能，，可利用变频风机调节采暖性能。本文综合考虑了多孔太阳墙采暖系统的传热机制以及风机和回风管的作用，建立描述多孔太阳墙系统传热与流动特性的数值模型。模拟分析结果如下：多孔太阳墙内骨架及孔隙空气温度场分布较为均匀；多孔太阳墙吸收的大部分太阳辐射能都用于加热空气实时给室内供暖，小部分储存起来用于夜间给室内空气提供热源；太阳辐射强度越大，所建太阳房的采暖性能越好；由于多孔材料的物性参数不同，多孔太阳墙采暖房的集热蓄热性能各不相同，采用陶瓷材料能达到最优的综合性能；所采用多孔材料的导热系数、孔隙率及其蓄热能力对太阳房性能影响较大，增大导热系数会使多孔墙温度场更为均匀，增大孔隙率会使系统采暖性能降低但流动阻力减小，增大蓄热能力可有效提高系统采暖性能；风机流量较高时所建太阳房的采暖性能变差；增大回风率能有效提高多孔太阳墙采暖房系统的采暖性能，但系统内新风量减少，应适当调整回风率，可以解决改善通风与采暖之间的矛盾。本文所建多孔太阳墙采暖房综合效率较好，能在较长时间内达到采暖要求。
[Abstract]:Solar house is a new type of solar heating technology, it can achieve efficient heating, effective ventilation, to save energy, reduce environmental pollution, has important significance to improve the ecological balance. This paper firstly introduces the principle of porous solar wall system, characteristics and application examples at home and abroad, including the Trombe wall solar house with the heat, the most widely used.
The porous solar wall heating room built in this paper using porous ceramic as Trombe wall materials and installation of variable frequency fan and air return pipe, with high solar energy utilization efficiency, can independently regulate the ventilation and heating rate, good lighting, comfortable and high advantage. According to the experimental research results show that the built sun room. The indoor temperature field is more uniform, affected by the weather and solar radiation intensity is affected in sunny days no clouds and low ambient temperature conditions can reach the best performance of the adjustable heating, heating performance by using the frequency conversion fan.
In this paper, considering the heat transfer mechanism of porous solar wall heating system and the role of the fan and the air return pipe, a numerical model describing the flow and heat transfer characteristics of porous solar wall system. The simulation results are as follows: the porous solar wall skeleton and pore distribution within the air temperature field is uniform; most of the solar radiation absorption of Porous Solar Wall is used for heating the air to the indoor heating time, small part of storage for night to provide indoor air heat source; solar radiation intensity is large, the better the performance of the solar heating room; the physical parameters of porous materials, heat collecting pswhr storage performance is different, the ceramic material can reach the optimal comprehensive performance; the thermal conductivity of porous material, porosity and heat storage capacity has great influence on the performance of solar house, will increase the coefficient of thermal conductivity The porous wall temperature field is more uniform, increase the porosity makes the system heating performance decreased but the flow resistance is reduced, increasing storage capacity can effectively improve the system performance of heating; heating performance of a solar building built by fan flow at higher variation; increasing return rate can effectively improve the heating performance of Porous Solar Wall heating room, but the new system should be adjusted to reduce air volume, air return rate, can solve the contradiction between the improvement of ventilation and heating.
The porous solar wall heating room built in this paper has a good comprehensive efficiency and can meet the heating requirements for a long time.

【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU832.17

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