| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
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| Outline of Final Research Achievements |
The flow drag reduction effect of the heat transfer medium is useful for effective energy consumption system. On the other hand, there is an issue that the heat transfer characteristic of the surfactant solution is reduced in the heat exchanger. The purpose of this study is to improve the heat transfer characteristics in heat exchanger in the district heating and cooling system. In this paper, the rough heating surface have attracted much attention. And it was measured the flow resistance and heat transfer behavior in a rectangular pipe having one rough heating surface in order to promote heat transfer of the CTAB solution in the heat exchanger. As a result, it was found that the roughness surface causes disturbance of flow and breaking a rod-like micelle structure of CTAB. Therefore, the flow drag and heat transfer in the test section having rough surface increase as compared with that in the test section having smooth surface.
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