成果報告書詳細
管理番号20160000000538
タイトル*平成27年度中間年報 地熱発電技術研究開発 低温域の地熱資源有効活用のための小型バイナリー発電システムの開発 水を作動媒体とする小型バイナリー発電の研究開発
公開日2016/12/13
報告書年度2015 - 2015
委託先名一般財団法人エネルギー総合工学研究所 国立大学法人東京大学 株式会社アーカイブワークス
プロジェクト番号P13009
部署名新エネルギー部
和文要約
英文要約Title:Research and development of small binary power generation with water as working medium (FY2014 - FY2017) FY2015 Annual Report
In this project, we are developing a binary power generation system with water as working medium in order to enhance the acceptability of binary power generation to communities. This system has superiority to the point of unnecessary of risk, environmental pollution and waste treatment.
In this year, we have performed the followings:
(1) Design and development of the entire system: power generation control system using medium circulation pump was considered. Economical evaluation was examined for the demonstration system using thermal effluent. In addition, we have designed power generation demonstration system using a hot spring water.
(2) Development of power generator: we have designed and built turbine power generator with twin entry turbine, water-lubricated bearings, and variable nozzle mechanism. Furthermore, we have built power generation systems for achieving the efficiency targets and for demonstration.
(3) Research and Development for High-Efficiency Heat Exchanger: we have developed a tool to bridge between the microscopic flow and heat transport phenomena occurring inside a heat exchanger and the overall efficiency of the proposed power generation cycle. Based on the unified analyses, we clarified that the overall heat transfer is mostly governed by a single phase flow, whereas the pressure drop in the two-phase flow has a considerable impact on the overall generation efficiency. By applying the finite volume method to voxel grids, we developed a numerical code which is capable of dealing with conjugate problems involving heat conduction inside a heat transfer surface, and convective heat transfer inside a conduit. Then, the adjoint code was also implemented to the developed code, so that it can be applicable to shape optimization of complex heat transfer surfaces.
(4) Field test: plumbing, electrical and automatic control works was done at the test site in order to introduce effluent hot water and cooling water to power generation system. Hot-spring candidate sites for the field test were selected by conditions in supplying hot spring water and cooling water, use application of generated power, etc.
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