Effects of subcooling on downward facing boiling heat transfer with micro-porous coating formed by Cold Spray technique

Effect of grooves on nucleate boiling heat transfer from downward facing hemispherical surface

“…Besides, the CHF on grooved surface was compared with other surfaces in Fig. 8, and the plain surface (Yang et al, 2006), coated surface (Yang et al, 2006), and coated surface (Sohag et al, 2017) were tested in SBLB experimental apparatus. The coated surface shows significant enhancement of CHF comparing with the plain surface.…”

“…The coated surface shows significant enhancement of CHF comparing with the plain surface. The coated surface (Yang et al, 2006) was sintered with micro-porous aluminum coatings, while the coated surface (Sohag et al, 2017) was manufactured with stainless steel by Cold Spray technique. Sohag et al (2017) indicated that the coated surface will be a viable technique for IVR of a commercial-sized reactor lower head.…”

“…The coated surface (Yang et al, 2006) was sintered with micro-porous aluminum coatings, while the coated surface (Sohag et al, 2017) was manufactured with stainless steel by Cold Spray technique. Sohag et al (2017) indicated that the coated surface will be a viable technique for IVR of a commercial-sized reactor lower head. Compared with the 3D plain surface, the CHF increase of grooved surface was more than 102%, and the CHF enhancement could attribute to the increase of heat transfer area and the improvement of the wettability.…”

“…Various methods have been proposed for enhancing ERVC performance, including using structured surface, nanofluids (Pham et al, 2012;Angayarkanni and Philip, 2015) and thermal insulation (Yang et al, 2005;Noh and Suh, 2013). The structured surfaces include porous coating (Yang et al, 2006;Jun et al, 2016;Tetreault-Friend et al, 2016;Sohag et al, 2017;Wang et al, 2018), pin fins (Chu et al, 2013;Zhong et al, 2015), micro channels (Bai et al, 2016;Hou et al, 2017;Zhong et al, 2018aZhong et al, , 2018b, honeycomb porous plates (Mt Aznam et al, 2016;Fogaça et al, 2018), and spherical porous bodies (Mori et al, 2018), and so on. Yang et al (2006) fabricated a downward facing hemispherical surface with micro-porous coatings by sintering, while Sohag et al (2017) developed a Cold Spray technique to coat the same scale surface, both the coating surfaces were tested in the SBLB (Sub-scaled Boundary Layer Boiling) facility to investigate the CHF.…”

Subcooled flow boiling heat transfer enhancement using polyperfluorodecylacrylate (pPFDA) coated microtubes with different coating thicknesses

“…As one of the recent studies, Sohag et al [13] used cold spray coating method to construct microporous coatings by depositing 90 wt.% of stainless steel and 10 wt.% of aluminum. Various degrees of subcooling (10°C, 5°C, 3°C, 1°C, and 0°C) were examined.…”