Constitution and Declaration of Heat Transfer Enhancement Mechanism Using High-Temperature Water Vapor

2014 Fiscal Year Final Research Report

• Project/Area Number: 24560222
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Thermal engineering
• Research Institution: Yokohama National University
• Principal Investigator: SAKAI Seigo 横浜国立大学, 工学(系)研究科(研究院), 准教授 (70323110)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: エネルギー利用 / ふく射 / 対流 / 水蒸気

Outline of Final Research Achievements

Water vapor is known as one of the non-gray gases, and absorbs and re-emits radiation. Therefore, the change of water vapor concentration influences heat transfer. An increase in flow velocity is also achieved due to fluid volume expansion by the generation of high-temperature water vapor. From these two characteristics, generation of high-temperature water vapor to the combustion field have potential to contribute to heat transfer enhancement. This study aims to apply high-temperature steam heating mechanism to an industrial furnace. In this study, it is intended to brush up efficient heat transfer mechanism with using spiral flow path, and also assess the impact of water vapor by experiment using the actual device.
Results show that generation of high-temperature water vapor by the addition of appropriate quantities of water contributes to heat transfer enhancement. It is found that radiative heat transfer is more dominant compared with convective heat transfer.

Free Research Field

熱流体工学