Implementing Superhydrophobic Surfaces within Various Condensation Environments: A Review. Issue 2 (19th October 2020)

• Record Type: Journal Article
• Authors: Singh, Navdeep Sangeet; Zhang, Jitao; Stafford, Jason; Anthony, Carl; Gao, Nan
• Is Part Of: Advanced materials interfaces. Volume 8:Issue 2(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-10-19
• Subjects: condensers -- dropwise condensation -- fabrication techniques -- heat transfer -- superhydrophobic surfaces; Materials science -- Periodicals; 620.11
• DOI: 10.1002/admi.202001442
• Languages: English
• ISSNs: 2196-7350

Abstract

Abstract: Steam condensation is omnipresent, and inevitable in many industrial processes. A classic example is seen within condensers that are used to liquify various gasses. In consequence, water‐vapor is eventually deposited upon the exterior of heat pipes that passively cool the gas to form a thin film of liquid. This macroscopic film is responsible for the degradation of heat transfer efficiencies. Liquid repellent surfaces can microscopically manipulate the hydrodynamics of formulating condensate to transition toward dropwise/jumping‐droplet condensation. This effect will save operating and maintenance costs of steam condensers within power‐plants, subsequently reducing emissions, operating power, and fuel consumption. However, the challenges associated with the stabilization of dropwise/jumping‐droplet condensation, especially at large subcooling temperatures and high supersaturation ratios, have prohibited the use of liquid repellent surfaces. This review aims to discuss recent improvements and understanding of dropwise/jumping‐droplet condensation surfaces on superhydrophobic surfaces. Numerous examples shall be included, showing experimental and numerical studies of various innovative properties of superhydrophobic structures. In addition, various fabrication techniques of superhydrophobic surfaces that are applicable within industrial systems are discussed. These topics are consolidated to provide guidelines for future research into dropwise/jumping‐droplet condensation on liquid repellent surfaces. Abstract : In this review, the use of innovative superhydrophobic surfaces to facilitate dropwise and jumping‐droplet condensation within industrial settings are discussed. Such environments involve the effects of noncondensable gas, vapor shear flow, and high subcooling temperatures, which are evaluated alongside to identify their influence on the heat transfer performance and the sustainability of these notable surfaces.