Development of liquid-turbine power generator due to convective flow of mercury induced by low-temperature waste heats

利用低温废热引起的汞对流开发液体涡轮发电机

• 批准号: 24656135
• 负责人: DEGUCHI Seiichi
• 金额: $ 2.66万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-24656135/
• 关键词: エネルギー創生; 廃熱発電; 液タービン; 相変化; 強制流; 流体力学; エネルギー回生; 創エネルギー; 熱流体力学; 強制対流

As a new energy harvesting system from waste heats below 100 degreeC, liquid-turbine power generator had been proposed due to liquid convective flow. In this work, theoretical feasibility study to check the proposal, manufacture of prototype apparatus and demonstrations were done.Firstly, mercury was considered the most promising medium for the proposed power generator since it has the heaviest relative density among any liquids under room temperature, expecting the higher momentum. However, it had been clarified from theoretical calculations that the convective flow rates were relatively low, and then efficient momentum could not be obtained if mercury had been utilized. To adopt enforced flow due to phase changes of medium to the proposed power generator, surveying any liquids reached NOVEC with a low boiling temperature, higher density and insolubility to water. Finally, power generation could be achieved with using NOVEC/water biphasic medium according to assumed processes.

液体涡轮发电机作为一种新型的从100℃以下的废热中回收能量的系统，是由于液体对流的缘故而提出的。首先，汞被认为是最有前景的介质，因为它在室温下具有最大的相对密度，预计会有更高的动量。然而，理论计算表明，对流流量相对较低，如果使用汞，就不能获得有效的动量。为了对拟建的发电机采用介质相变强制流动，对任何到达NOVEC的液体进行测量，这些液体沸腾温度低，密度高，不溶于水。最后，按照设想的流程，利用NOVEC/水两相介质实现发电。

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