A Self-Adaptive Integration of Photothermal and Radiative Sky Cooling for Continuously Efficient Harvesting of Energy From the Sun and Outer Space

EngRN: Heat Transfer (Topic) Pub Date : 1900-01-01 DOI:10.2139/ssrn.3933998

Xianze Ao, Bowen Li, Bin Zhao, Mingke Hu, H. Ren, Honglun Yang, Jie Liu, Jingyu Cao, Junsheng Feng, Yuanjun Yang, Z. Qi, Liangbin Li, C. Zou, G. Pei

{"title":"A Self-Adaptive Integration of Photothermal and Radiative Sky Cooling for Continuously Efficient Harvesting of Energy From the Sun and Outer Space","authors":"Xianze Ao, Bowen Li, Bin Zhao, Mingke Hu, H. Ren, Honglun Yang, Jie Liu, Jingyu Cao, Junsheng Feng, Yuanjun Yang, Z. Qi, Liangbin Li, C. Zou, G. Pei","doi":"10.2139/ssrn.3933998","DOIUrl":null,"url":null,"abstract":"The sun (~6000 K) and outer space (~3 K) are two significant renewable thermodynamic resources for human beings on Earth. The solar thermal conversion by photothermal (PT) and harvesting the coldness of outer space by radiative sky cooling (RSC) have already attracted tremendous interest. However, most of the approaches for PT and RSC are static and mono-functional, which can only provide heating or cooling under sunlight or darkness. Here, we develop a spectrally self-adaptive absorber/emitter (SSA/E) with strong solar absorption and switchable emissivity within the atmospheric window (i.e., 8-13μm) for the dynamic combination of PT and RSC, corresponding to continuously efficient energy harvesting from the sun and universe. The as-fabricated SSA/E not only can be heated to ~170°C above ambient temperature under sunshine and but also be cooled to 20°C below ambient temperature, and thermal modeling captures the high energy harvesting efficiency of the SSA/E, enabling new technological capabilities.","PeriodicalId":424061,"journal":{"name":"EngRN: Heat Transfer (Topic)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"EngRN: Heat Transfer (Topic)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.2139/ssrn.3933998","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 1

Abstract

The sun (~6000 K) and outer space (~3 K) are two significant renewable thermodynamic resources for human beings on Earth. The solar thermal conversion by photothermal (PT) and harvesting the coldness of outer space by radiative sky cooling (RSC) have already attracted tremendous interest. However, most of the approaches for PT and RSC are static and mono-functional, which can only provide heating or cooling under sunlight or darkness. Here, we develop a spectrally self-adaptive absorber/emitter (SSA/E) with strong solar absorption and switchable emissivity within the atmospheric window (i.e., 8-13μm) for the dynamic combination of PT and RSC, corresponding to continuously efficient energy harvesting from the sun and universe. The as-fabricated SSA/E not only can be heated to ~170°C above ambient temperature under sunshine and but also be cooled to 20°C below ambient temperature, and thermal modeling captures the high energy harvesting efficiency of the SSA/E, enabling new technological capabilities.

查看原文本刊更多论文

光热和辐射天空冷却的自适应集成，用于持续有效地收集来自太阳和外太空的能量

太阳(~ 6000k)和外太空(~ 3k)是地球上人类重要的可再生热力资源。利用光热(PT)技术进行太阳热能转换和利用天空辐射冷却(RSC)技术收集外层空间的冷已经引起了人们极大的兴趣。然而，PT和RSC的大多数方法是静态的和单功能的，只能在阳光或黑暗下提供加热或冷却。在此，我们开发了一种光谱自适应吸收/发射体(SSA/E)，该吸收/发射体在大气窗口(即8-13μm)内具有强的太阳吸收和可切换的发射率，用于PT和RSC的动态组合，对应于从太阳和宇宙中连续高效地收集能量。制备的SSA/E不仅可以在阳光下加热到比环境温度高170°C，也可以冷却到比环境温度低20°C，并且热建模捕获了SSA/E的高能量收集效率，从而实现了新的技术能力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

EngRN: Heat Transfer (Topic)

自引率

0.00%

发文量