成果報告書詳細
管理番号20140000000648
タイトル*平成23年度中間年報 「新エネルギーベンチャー技術革新事業 新エネルギーベンチャー技術革新事業(風力その他未利用エネルギー) 未利用熱エネルギーを用いた小型発電システムの研究開発」
公開日2014/9/17
報告書年度2011 - 2011
委託先名九州電子技研株式会社
プロジェクト番号P10020
部署名イノベーション推進部
和文要約
英文要約Title: New Energy Venture Business Technology Innovation Program / New Energy Venture Business Technology Innovation Program (wind power generation and other untapped energies ) / Compact Power Generation System Utilizing Unused Thermal Energy (FY2011-FY2012) FY2011 Annual Report

We are developing a power generation system utilizing unused thermal resources based on a new concept of compound turbine system. The compound turbine system combines turbine, pump and electric generator with a common axis of rotation. Among these, turbine system is important in a power generation process, since this part has a role of mechanical power output in generator based on the Kalina cycle. Design of turbine system has been made with special emphasis on the output power level and production cost.
To find and establish the cost effective mass production scheme is one of the most important purpose of the present project. The following conditions are assumed as fundamental features of the present turbine system, i.e., (i) axial flow based impulse turbine of single stage or velocity compound impulse turbine, (ii) nozzle inlet steam pressure is less than p1=2 [MPa], (iii) turbine rotation frequency is 5000 [rpm].
Further parameters such as (v) mean radius of axial flow, r (or outer diameter of turbine), (vi) steam mass flux, , must be taken into account, since they influence the production cost. Turbine design is entirely based on the diagram procedure by the momentum theory.
Turbine design calculations have been made by varying parameters listed above. Results of three different turbine diameters, 0.18, 0.24 and 0.30[m] indicate that both diagrammatic efficiency and output increases with diameter. Although the velocity compound turbine is favorable for larger output even for smaller diameter, turbine system with largest turbine diameter is found to be the best due to the fabrication cost of turbine blades.
Turbine system must be incorporated into a Kalina cycle. Design of the Kalina cycle has been simulated for several cycle parameters in order to obtain optimum selection of heat exchangers, pump systems appropriate for the relatively low temperature heat sources. Some of the specifications of the cycle parameters are (i) ammonia/water mixture of 9:1 mass fraction, (ii) inlet temperature of the hot water is 80 ℃, (iii) inlet temperature of the cold water is 30 ℃, etc. Most of the required parts of the cycle construction were determined by the present analysis.
Performance test of the constructed power generation system is now under way. Eventually, we will examine the feasibility and performance of the present system at a Industrial Waste Treatment Facility.
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