A Triple-Layer Membrane with Hybrid Evaporation and Radiation for Building Cooling
Author:
Mao Mingran1, Feng Chunzao1, Pei Junxian2ORCID, Liu Huidong1, Jiang Haifeng1ORCID
Affiliation:
1. MOE Key Laboratory of Hydraulic Machinery Transients, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China 2. State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource & Hydropower, Sichuan University, Chengdu 610065, China
Abstract
Passive cooling for thermal comfort improvement has received extensive attention for its low energy consumption. However, most of the existing passive cooling technologies require a complex system design and supporting equipment, since they cool the ambient air. Herein, we propose a hybrid evaporative and radiative cooling membrane with a hygroscopic hydrogel sandwiched by two layers of a porous polyethylene aerogel (PEA). The hydrogel implements evaporative cooling. Combining the high solar reflection of PEA and the high infrared emissivity of hydrogel, this hybrid membrane also possesses radiative cooling. In addition, the high infrared transmittance and low thermal conductivity of PEA allow direct heat transfer between the hydrogel and human body, instead of the ambient air. Through comparative experiments and theoretical calculations, it is indicated that the net cooling power delivered by the hybrid membrane to the human body is up to 78.45 W m−2, which is much higher than that of conventional radiative cooling materials. Outdoor demonstration shows that emission below the hybrid membrane can achieve an average sub-ambient temperature drop of 6 °C, with a maximum of 14 °C, showing great potential for passive building cooling and human personal cooling.
Funder
Fundamental Research Funds for the Central Universities, Sichuan University
Subject
Energy (miscellaneous),Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electrical and Electronic Engineering,Control and Optimization,Engineering (miscellaneous),Building and Construction
Reference41 articles.
1. Asim, N., Badiei, M., Mohammad, M., Razali, H., Rajabi, A., Chin Haw, L., and Jameelah Ghazali, M. (2022). Sustainability of Heating, Ventilation and Air-Conditioning (HVAC) Systems in Buildings—An Overview. IJERPH, 19. 2. Alternative refrigerants with low global warming potential for refrigeration and air-conditioning industries;Tsvetkov;IOP,2020 3. Team, E. (2018). The Future of Cooling: Opportunities for Energy-Efficient Air Conditioning, International Energy Agency. 4. Using long short-term memory networks to predict energy consumption of air-conditioning systems;Zhou;Sustain. Cities Soc.,2020 5. Contribution of air conditioning adoption to future energy use under global warming;Davis;Proc. Natl. Acad. Sci. USA,2015
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|