Brushed lubricant-impregnated surfaces (BLIS) for long-lasting high condensation heat transfer

Recently, lubricant-impregnated surfaces (LIS) have emerged as a promising condenser surface by facilitating the removal of condensates from the surface. However, LIS has the critical limitation in that lubricant oil is depleted along with the removal of condensates. Such oil depletion is significan...

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Bibliographic Details
Published in:Scientific reports 2020-02, Vol.10 (1), p.2959-2959, Article 2959
Main Authors: Seo, Donghyun, Shim, Jaehwan, Lee, Choongyeop, Nam, Youngsuk
Format: Article
Language:English
Subjects:
639/166/988
639/766/119/544
Condensates
Heat transfer
Humanities and Social Sciences
Hydrophobicity
multidisciplinary
Oil
Science
Science (multidisciplinary)
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Summary:Recently, lubricant-impregnated surfaces (LIS) have emerged as a promising condenser surface by facilitating the removal of condensates from the surface. However, LIS has the critical limitation in that lubricant oil is depleted along with the removal of condensates. Such oil depletion is significantly aggravated under high condensation heat transfer. Here we propose a brushed LIS (BLIS) that can allow the application of LIS under high condensation heat transfer indefinitely by overcoming the previous oil depletion limit. In BLIS, a brush replenishes the depleted oil via physical contact with the rotational tube, while oil is continuously supplied to the brush by capillarity. In addition, BLIS helps enhance heat transfer performance with additional route to droplet removal by brush sweeping. By applying BLIS, we maintain the stable dropwise condensation mode for > 48 hours under high supersaturation levels along with up to 61% heat transfer enhancement compared to hydrophobic surfaces.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-020-59683-z