成果報告書詳細
管理番号20150000000507
タイトル*平成26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/環境負荷と伝熱特性を考慮したバイナリー発電用高性能低沸点流体の開発
公開日2015/7/17
報告書年度2014 - 2014
委託先名国立大学法人東京大学 旭硝子株式会社
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: Development of a high-performance low-boiling-point fluid for binary-cycle power generation with taking into account the environmental impacts and the heat transfer characteristics (FY2014-2015) FY2014 Annual Report
Since hot springs are distributed all over the country in Japan, growing attention has been paid to further introduction of small-scale binary-cycle generation systems, which generate the power from the heat in hot springs and can be utilized as geographically-distributed energy source. Conventional low-boiling-point fluids employed in existing binary-cycle generation systems do not satisfy all the requirements from the environmental impact, low GWP, low ODP, no flammability and no toxicity.
In this project, our goal is to develop a new high-performance low-boiling-point fluid, which is suited for low-temperature geothermal energy conversion with effective utilization of unused energy from the hot springs. In order to realize the enhancement of the thermal efficiency and the miniaturization of the total system, heat transfer and fluid flow characteristics are taken into account in the development of the new fluid, along with the concern for the environmental impacts and safety factors.
In the University of Tokyo’s group, we are performing heat transfer analyses both analytically and experimentally in order to accomplish a small-scale binary-cycle system. In FY2014, we made the following research progresses: 1. We have established a 1-D heat-exchanger simulation tool that provides the sensitivity of the thermo-physical properties, e.g., thermal conductivity, latent heat, to the required size of the heat exchangers in the binary-cycle system. 2. We have improved our experimental apparatus with additional modifications for precise control and measurement. The cycle performance has been examined using a conventional working fluid. 3. We have prepared a computer environment of a heat-exchanger simulator, in order to allow for compact design of heat exchangers in the binary-cycle system.
In Asahi Glass Company (AGC) ’s group, the scopes of our studies are on the followings: 1. Structural design of the high-performance, low-boiling-point working fluid. 2. Study of synthetic route of the high-performance, low-boiling-point fluid. The first scope was addressed at the first fiscal year. We performed a preliminary study to extend the informatics-based simulation techniques previously developed by AGC. We have collected the chemical and physical properties of the various low-boiling-point fluids available in literature, and have modified the simulation techniques for the estimation of the chemical and physical properties suitable for binary-cycle power generation.
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