浸透圧を利用した塩分濃度差発電の性能に及ぼす塩分濃度の影響(流体工学,流体機械)

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This paper presents an experimental study about a possibility of a hydroelectric power station due to osmotic pressure generated between sea water and river water. The experiment is conducted by a newly constructed equipment using a spiral reverse osmotic module with membrane surface area 4.318m^2. The equipment can be pressured up to 0.5MPa to avoid a generation of bubble in pure and salt water channels. Tap water and salt water are used for experiment instead of river water and sea water. On the way of tap water passage,a valve is inserted to generate a loss corresponding to a hydraulic turbine load. Using a pump,salt water is forced to circulate and its flow rate is variable. The flow rate of tap water and the pressure difference between the valve inlet and outlet are measured with varying salt concentration from 0.1wt% to 0.6wt% and salt water flow rate from 3.51/min to 5.01/min. In these experiments we can obtain a maximum output about 0.86W at salt concentration 0.6wt%. From these results,we had a confidence to construct the hydraulic power station utilizing osmotic pressure.
一般社団法人日本機械学会の論文
2008-09-25