1. Brushed lubricant-impregnated surfaces (BLIS) for long-lasting high condensation heat transfer
- Author
-
Choongyeop Lee, Donghyun Seo, Jaehwan Shim, and Youngsuk Nam
- Subjects
Materials science ,lcsh:Medicine ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Article ,law.invention ,Surfaces, interfaces and thin films ,law ,Tube (fluid conveyance) ,Lubricant ,lcsh:Science ,Condenser (heat transfer) ,Supersaturation ,Multidisciplinary ,Condensation heat transfer ,Heat transfer enhancement ,lcsh:R ,Brush ,021001 nanoscience & nanotechnology ,Mechanical engineering ,0104 chemical sciences ,Chemical engineering ,Heat transfer ,lcsh:Q ,0210 nano-technology - Abstract
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.
- Published
- 2020