| 摘要: |
| 建立了高为80cm，截面为40cm×40cm的长方体水箱，并对水箱的热力性能进行了模拟及实验研究。实验分别设计了开槽型进口和直接进口结构的水箱CFD三维模型，并利用水箱Ri数和用能效率对不同进口结构的性能进行分析比较。同时，搭建不同进口结构水箱实验台，验证分析不同进口结构对水箱用能效率的影响。实验结果表明其中的开槽型结构水箱与直接进口结构相比能有效改善用能过程的热分层效果，明显提高用能效率。在5L/min流量条件下，开槽型进口结构的用能效率比直接进口的高出7%，而当流量为15L/min时，两者之间的差距增大至25%。 |
| 关键词: 用能效率 CFD模拟 热分层 |
| DOI： |
| Received:September 21, 2012 |
| 基金项目:“十二五”国家科技支撑计划课题（2011BAJ03B05）资助项目 |
|
| Simulation and Experimental Investigation of the Influence on the Performance of Tanks with Different Inlets |
|
Li Yang1, Li Shuhong1, Zhao Miao2, Zhang Xiaosong1
|
| (1.School of energy and environment, Southeast University;2.Beijing Guojian Design Corporation) |
| Abstract: |
| This paper designed a solar water tank with dimension of 80cm(height)×40cm(width) ×40cm(length) and the slotting inlet and direct inlet to study discharging performance of tank by presenting some experiments and simulations. The Ri number and the discharging efficiency were introduced to investigate the performance of the different inlet-tanks. The discharging efficiency was introduced to evaluate the thermal performance of the tank with different inlets. The result indicated that slotting inlet improved the efficiency of thermal stratification effectively and promoted discharging performance obviously. The discharging efficiency of slotting inlet was 7% higher than the direct inlet with the flow rate of 5L/min and the gap increased to 25% when the flow rate is 15L/min. |
| Key words: discharging efficiency CFD simulation thermal stratification performance |
