CHF enhancement of a large heated surface by a honeycomb porous plate and a gridded metal structure in a saturated pool boiling of nanofluid

•A large heated surface (ϕ50mm) is used which could represent the infinite heated surface.•Each surface modification by a HPP, GMS and, nanofluid shows CHF enhancement.•The shortened hovering period of coalesced bubbles by GMS allows more liquid to the heated surface.•The combination of HPP and GMS...

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