Morpho Butterfly-Inspired Spectral Emissivity of Metallic Microstructures for Radiative Cooling

发射率 辐射冷却 辐射传输 材料科学 被动冷却 选择性表面 光学 黑体辐射 热辐射 光电子学 热的 辐射 物理 气象学 热力学
作者
Anirudh Krishna,Jae-Ho Lee
标识
DOI:10.1109/itherm.2018.8419652
摘要

Radiative cooling offers unique capabilities of controlling surface temperature and improving the energy efficiency of various systems ranging from buildings to micro-devices and personal clothing using re-emission of heat via the atmospheric transmission spectrum in the spectral range of 814 μm. Control of the spectral emissivity profile results in control of the thermal behavior of the surfaces. Tailoring the emissivity profile to match the atmospheric transmission spectrum results in radiative cooling of surfaces. Here we investigate the use of bio-inspired designs for radiative cooling applications. Our simulations of Morpho butterfly inspired branched microstructures (micro-trees, briefly) based on rigorous coupled wave analysis offer optimally-designed micro-trees that act as perfect reflectors of incident solar radiation, while acting as near-black bodies within the atmospheric transmission spectrum. The structural periodicities result in an emissivity below 0.2 between 1 μm and 6 μm, reducing adverse effects of solar heating. Meanwhile the emissivity remains above 0.7 for 8-14 μm, offering an increased opportunity for radiative cooling. The use of typically hot metallic surfaces, with very low emissivity values, results in radiative cooled metallic micro-trees with spectral-selective emissivity. The surface temperature of metallic micro-trees is roughly 9-10 K lower than bare metallic surfaces, aided by an increased cooling power of roughly 140 W/m2. The spectral selectivity of these structures is attained by the tunable morphology of the structures themselves. The bio-inspired micro-trees present opportunities for passive radiative cooling, with their structural flexibility and spectral tuning opening the field for broad thermal management applications.
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
PDF的下载单位、IP信息已删除 (2025-6-4)

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
感动黄豆发布了新的文献求助10
刚刚
李爱国应助故意的靳采纳,获得50
1秒前
研友_ngkyGn应助Akin采纳,获得10
1秒前
2秒前
双楠应助sunshine采纳,获得10
3秒前
胡航航完成签到,获得积分10
4秒前
hp发布了新的文献求助30
6秒前
yyauthor完成签到,获得积分10
6秒前
Quinna发布了新的文献求助10
8秒前
9秒前
12秒前
量子星尘发布了新的文献求助10
13秒前
cathy-w完成签到,获得积分0
14秒前
Sunnyside发布了新的文献求助10
14秒前
wenxiansci完成签到,获得积分0
15秒前
15秒前
17秒前
嗯嗯完成签到,获得积分10
18秒前
Zsir完成签到,获得积分10
18秒前
完美世界应助酷酷的友灵采纳,获得10
19秒前
英姑应助十九岁的时差采纳,获得10
22秒前
23秒前
ableyy完成签到,获得积分10
23秒前
23秒前
hhhblabla应助等待的花生采纳,获得10
24秒前
寒冷的小chao关注了科研通微信公众号
24秒前
26秒前
李李完成签到 ,获得积分10
26秒前
26秒前
lucy_zi发布了新的文献求助10
28秒前
闪闪w完成签到,获得积分10
29秒前
欣喜沛芹发布了新的文献求助10
30秒前
潇湘雪月发布了新的文献求助10
31秒前
31秒前
完美世界应助Bressanone采纳,获得10
32秒前
35秒前
徐哈哈发布了新的文献求助10
37秒前
39秒前
40秒前
41秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
‘Unruly’ Children: Historical Fieldnotes and Learning Morality in a Taiwan Village (New Departures in Anthropology) 400
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
热门求助领域 (近24小时)
化学 材料科学 医学 生物 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 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3989242
求助须知:如何正确求助?哪些是违规求助? 3531393
关于积分的说明 11253753
捐赠科研通 3270010
什么是DOI,文献DOI怎么找? 1804868
邀请新用户注册赠送积分活动 882084
科研通“疑难数据库(出版商)”最低求助积分说明 809136