CH3COONa•3H2O相变蓄热性能研究及在蓄能空调中的应用
文献类型：学位论文
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| 作者 | 石海民 |
| 学位类别 | 硕士 |
| 答辩日期 | 2009-05-27 |
| 授予单位 | 中国科学院广州能源研究所 |
| 授予地点 | 广州能源研究所 |
| 导师 | 梁德青 |
| 关键词 | 三水醋酸钠 过冷 析出 空调节能 冷凝热回收 双蓄能空调 |
| 其他题名 | Study on the Phase Change Thermal Storage Properties of Sodium Acetate Trihydrate and its Application in Energy Storage Air Conditioning |
| 中文摘要 | Air conditioning energy saving has increasingly become the focus of attention and study, as the increase of air conditioning energy consumption. Recovery of condensing heat is one of the important air conditioning energy saving technology for not only increasing energy efficiency ratio，but also reducing peak and filling valley, and balancing power load. In this paper, the phase change material developed by us was used as heat storage medium, and was researched in dual energy storage air conditioning system that could store cold both energy and condensing heat of air conditioning. Specifically, the following subjects have been accomplished: (1) the phase transition properties of sodium acetate trihydrate was studied, its supercooling and precipitation were solved, its latent heat, transformation temperature and thermal conductivity were measured and improved in order to develop a new phase change material used in dual energy air conditioning. (2) the dual energy storage air conditioning experimental equipment was put up including the material researched by us in its heat accumulator. Experiment study has been carried out in the space cooling and water heating mode, cool storage and water heating mode, and space cooling and heat storage mode in this system. The effect on the whole performance of this system was investigated by changing coolant flux, heat water flux and fan coil air flow. The results showed: (1) CMC could control the precipitation of sodium acetate trihydrate, Na4P2O7•10H2O and Na2HPO4•12H2O could resolve supercooling of this system, and sodium chloride solution could adjust its transformation temperature. (2) The phase change material’s latent heat was 241 J/g, transformation temperature was about 53℃, thermal conductivity was above 0.8 W/m•K, which was composed by 88.11wt%CH3COONa•3H2O+1.54wt%CMC+1.54wt%Na2HPO4•12H2O +8.81wt% NaCl (26.5wt%).(3) In the space cooling and water heating mode, the greater heat water flux, the better whole performance of the dual storage system. The integrated energy efficiency ratio (IEER) of this system was 7.14, as the heat water flux was 410L/h. (4) In space cooling and heat storage mode, the research showed that heat storage had little effects on space cooling, but the IEER was greatly improved that was useful for air conditioning energy saving. In this mode, the greater coolant flux and fan coil air flow, the greater IEER of this system. The value of IEER could research 7.06, when the fan coil air flow was 1033 m3/h and coolant flux was 972L/h. |
| 语种 | 中文 |
| 公开日期 | 2011-07-14 ; 2011-07-15 |
| 页码 | 65 |
| 源URL | [http://ir.giec.ac.cn/handle/344007/5854]  |
| 专题 | 中国科学院广州能源研究所 |
| 推荐引用方式 GB/T 7714 | 石海民. CH3COONa•3H2O相变蓄热性能研究及在蓄能空调中的应用, Study on the Phase Change Thermal Storage Properties of Sodium Acetate Trihydrate and its Application in Energy Storage Air Conditioning[D]. 广州能源研究所. 中国科学院广州能源研究所. 2009. |
入库方式： OAI收割
来源：广州能源研究所
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