个人信息Personal Information
教授
博士生导师
硕士生导师
任职 : 化学工程系主任
性别:男
毕业院校:大连理工大学
学位:博士
所在单位:化工学院
学科:化学工程. 工程热物理
办公地点:大连理工大学西校区化工实验楼D段313室
联系方式:壹玖伍贰陆伍叁捌陆柒玖
电子邮箱:rongfuwen@dlut.edu.cn
微纳复合表面HFE-7100/水的BRT现象及沸腾传热特性
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论文类型:期刊论文
发表时间:2022-06-30
发表刊物:Huagong Xuebao/CIESC Journal
卷号:72
期号:11
页面范围:5510-5519
ISSN号:0438-1157
摘要:HFE-7100/water as a non-azeotropic and immiscible working medium can broaden the effective temperature range of nucleate boiling heat transfer. At present, it is not clear about its boiling heat transfer characteristics and bubble movement mechanism on the micro-nano composite surface. In this paper, a hierarchical micro/nano structured surface composed of nano-particles and micro-holes was fabricated by the bubble-template-assisted electro-deposition method. Surface wettability and bubble dynamics during the boiling refrigerant transition (BRT) were investigated to clarify the heat transfer characteristics of HFE-7100/water boiling on the hierarchical micro/nano structured surface. The results show that the bubbles experience the small bubbles coalescence, gas film expansion and water nucleates on the heated surface at the BRT of HFE-7100/water. During the BRT process, there is a competition of liquid wetting between HFE-7100 and water on the surface. With the increase of superheat, stable nucleate boiling of thin HFE-7100 layer is broken and the upper water fluid can pass through the HFE-7100 layer to wet the heated surface, completing the BRT process. Compared with single liquid boiling, the HFE-7100/water boiling widens the effective temperature range of 343-423 K. This work clarifies the boiling heat transfer characteristics of HFE-7100/water on the hierarchical micro/nano structured surface and provides guidelines for structure design of enhanced heat transfer surfaces. © 2021, Editorial Board of CIESC Journal. All right reserved.
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