Condensation heat transfer in smooth and three-dimensional dimpled tubes of various materials

材料科学 冷凝 强化传热 传热 机械 强化传热 复合材料 热力学 传热系数 物理
作者
Wei Li
出处
期刊:Journal of Enhanced Heat Transfer [Begell House Inc.]
标识
DOI:10.1615/jenhheattransf.2024050485
摘要

The heat transfer and pressure drop of R410A and R32 within a smooth and an enhanced dimpled tube were measured for mass fluxes from 100 kg m−2 s−1 to 400 kg m−2 s−1, average vapor qualities between 0.2 and 0.8, and saturation temperatures between 35℃ and 45℃.dimpled. The test section length was 2 meters, and the outer and inner diameters of the tubes were 9.52 and 8.32 mm, respectively. The inner surface of the enhanced tube was dimpled. Three dimpled tubes and three smooth tubes, differing by material (copper, aluminum, and stainless steel) were tested to examine the material effect. The measured condensation heat transfer coefficient (HTC) for the copper smooth tube was between 1.10 to 1.16 times higher than that of the aluminum, and likewise, between 1.19 to 1.31 times higher than that of the stainless-steel tube. Similarly, the condensation HTC for the copper dimpled tube was between 1.06 to 1.15 times higher than that of the aluminum dimpled tube, and between 1.26 to 1.38 times higher than that of stainless-steel tube dimpled tube. In general, and the condensation HTC for R32 was greater than that for R410A owed mainly to the greater liquid thermal conductivity of R32. Flow patterns were observed for different vapor qualities and use to establish corresponding heat transfer mechanisms. Finally, a new correlation for dimpled tubes was proposed based a modified smooth tube correlation, which predicted the measurements to within 20 %.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
大幅提高文件上传限制,最高150M (2024-4-1)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
刚刚
研友_nxV4m8发布了新的文献求助10
刚刚
明亮念双完成签到,获得积分10
刚刚
科研者发布了新的文献求助30
2秒前
2秒前
陌路孤星发布了新的文献求助10
2秒前
2秒前
LLL完成签到,获得积分10
3秒前
3秒前
充电宝应助Forizix采纳,获得10
3秒前
3秒前
3秒前
迷途完成签到,获得积分10
3秒前
明亮念双发布了新的文献求助110
4秒前
田幻雪完成签到,获得积分20
4秒前
6秒前
迷途发布了新的文献求助10
7秒前
7秒前
7秒前
薰硝壤应助孔维艺采纳,获得30
7秒前
英姑应助3139813319采纳,获得10
7秒前
等待的乐儿完成签到,获得积分10
9秒前
9秒前
无花果应助3139813319采纳,获得10
9秒前
丘比特应助hjkk采纳,获得10
9秒前
10秒前
小火发布了新的文献求助10
11秒前
Tonnyjing应助小太阳采纳,获得10
11秒前
11秒前
11秒前
科研通AI2S应助迷途采纳,获得10
12秒前
lz123完成签到,获得积分10
12秒前
QXD完成签到,获得积分10
12秒前
阳光发布了新的文献求助10
12秒前
充电宝应助moyawen采纳,获得10
12秒前
eternal完成签到,获得积分10
13秒前
包容丹云发布了新的文献求助10
13秒前
14秒前
酷波er应助FSF采纳,获得10
14秒前
浅陌初心发布了新的文献求助10
14秒前
高分求助中
좌파는 어떻게 좌파가 됐나:한국 급진노동운동의 형성과 궤적 2500
Sustainability in Tides Chemistry 1500
TM 5-855-1(Fundamentals of protective design for conventional weapons) 1000
CLSI EP47 Evaluation of Reagent Carryover Effects on Test Results, 1st Edition 800
Threaded Harmony: A Sustainable Approach to Fashion 799
Livre et militantisme : La Cité éditeur 1958-1967 500
Retention of title in secured transactions law from a creditor's perspective: A comparative analysis of selected (non-)functional approaches 500
热门求助领域 (近24小时)
化学 医学 生物 材料科学 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 基因 遗传学 催化作用 物理化学 免疫学 量子力学 细胞生物学
热门帖子
关注 科研通微信公众号,转发送积分 3054835
求助须知:如何正确求助?哪些是违规求助? 2711704
关于积分的说明 7427777
捐赠科研通 2356290
什么是DOI,文献DOI怎么找? 1248044
科研通“疑难数据库(出版商)”最低求助积分说明 606566
版权声明 596083