Feasibility study of a small scroll turbine capable of a super critical CO2 Rankine Cycle

2015 Fiscal Year Final Research Report

• Project/Area Number: 25550094
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Design and evaluation of sustainable and environmental conscious system
• Research Institution: Nagasaki University
• Principal Investigator: SASAKI Soichi 長崎大学, 工学研究科, 助教 (00304965)
• Co-Investigator(Kenkyū-buntansha): YAMAGUCHI Tomohiko 長崎大学, 工学研究科, 准教授 (00284711) ; UMAKOSHI Koudo 長崎大学, 水産・環境科学総合工学研究科(環境), 准教授 (30232888)
• Co-Investigator(Renkei-kenkyūsha): MORITAKA Hideshiro 長崎大学, 工学研究科, 技術職員 (90315226)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: ターボ機械 / 流体工学 / 再生可能エネルギー / 流体熱物性 / 動力サイクル

Outline of Final Research Achievements

We aimed to create a small power cycle by the small temperature difference such as hot spring thermal energy. The objective of this study is to examine the feasibility of a CO2 Rankine cycle which becomes the auxiliary power for the civilian demands. First of all, we analyzed the operating conditions of the CO2 Rankine cycle based on its own thermophysical properties; it composed by a heat pump cycle which was reversed by a high pressure pump. The volume-type compressors are applied as the turbines. The characteristics of the fluid dynamics of the turbine have been evaluated in the test bench composed by the actual turbine. From these results, we discussed feasibility on the creation of the small-power CO2 Rankine cycle and its future works.

Free Research Field

流体工学，流体機械工学，空力音響学