Experimental investigation on photothermal conversion properties of lampblack ink nanofluids.

Citation metadata

Date: Apr. 2021
From: Solar Energy(Vol. 218)
Publisher: Elsevier Science Publishers
Document Type: Report; Brief article
Length: 367 words

Document controls

Main content

Abstract :

Keywords Solar energy; Photothermal conversion; Nanofluid; Lampblack ink Highlights * This work investigates solar photothermal conversion properties of lampblack ink nanofluids. * The optical properties of the lampblack ink nanofluids were simply tested. * Photothermal conversion experiments were done under solar simulator and natural sunlight. * With mass fraction increasing, photothermal conversion efficiency increases first and then decreases. Abstract Solar energy is an appropriate alternative to replace fossil fuel. Making high efficient use of solar energy is a critical issue. As a kind of solar collecting medium, nanofluid shows excellent optical and photothermal conversion properties. In this work, lampblack ink, a type of traditional Chinese ink, was used as heat collecting medium for photothermal conversion. Two-step method was taken to prepared water-based lampblack ink nanofluids at mass fraction of 0.01%, 0.02%, 0.05%, 0.1% and 0.2% respectively. The thermal conductivity of lampblack ink nanofluid was mearsured. The transmission spectrum of lampblack ink nanofluid was tested by uv--vis-nir spectrophotometer. Extinction coefficient and solar weighted absorption fraction were also calculated. Dispersion stability of nanofluid was also considered. Photothermal conversion experiments were taken under solar simulator and natural sunlight. The results showed that lampblack ink nanofluids have better photothermal conversion performance than DI water. With increasing of mass fraction, photothermal conversion performance of lampblack ink nanofluid increased and then decreased. The maximum photothermal conversion efficiency could reach 76.7% under solar simulator, which was 26.4% higher than that of DI water. This work could provide new insights on the application of photothermal such as solar collectors for an effective and low-cost way to address the critical energy shortages challenges. Author Affiliation: (a) College of Mechanical and Electronic Engineering, Beijing University of Chemical Technology, Beijing 100029, China (b) State Key Laboratory of Organic-Inorganic Composites, College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China (c) Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China * Corresponding author. Article History: Received 1 September 2020; Revised 15 November 2020; Accepted 4 February 2021 Byline: Xiahua Zuo (a), Weimin Yang (a,b,c), Meinong Shi [2017710028@mail.buct.edu.cn] (a,*), Hua Yan (a), Changfeng Guan (a), Sida Wu (a), Zhenghe Zhang (a), Xibiao Li (a), Zhao Li (a)

Source Citation

Source Citation   

Gale Document Number: GALE|A657002933