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International Heat Transfer Conference 16

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

EXPERIMENTAL INVESTIGATION ON HIGH HEAT FLUX SPRAY COOLING USING WATER ON COATED AND STRUCTURED SURFACES

Ranjith Kandasamy
School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 63979

Jinlong Xie
School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 63979

Teck Neng Wong
School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Republic of Singapore

Fei Duan
School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50, Nanyang Avenue, Singapore 639798, Singapore

Edwin Hang Tong Teo
School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 63979

Tony Siu Hon Tsang
Temasek Laboratories@NTU, 50 Nanyang Avenue, Singapore 639798, Singapore

Roland Yingjie Tay
Temasek Laboratories@NTU, 50 Nanyang Avenue, Singapore 639798, Singapore

DOI: 10.1615/IHTC16.ctm.023977
pages 3849-3856


MOTS CLÉS: Spray and atomization, Heat transfer enhancement, Structured surface

Résumé

An experimental investigation on the open loop spray cooling is carried out on a heated circular copper surface of area 3.14 cm2 at mass flow rate of water 5.2 g/s. A multi-nozzle array with four nozzles is used in this experiment. The heated surface and the multi-nozzle array are housed in a confined steel chamber and the heated surface is vertically oriented for the gravity-assisted drainage of unevaporated liquid. The heat transfer performance is analyzed for the bare flat surface, hexagonal boron nitride (h-BN) coated surface and straight fin-structured surface. Compared to the bare surface, a maximum heat flux enhancement of 28.2% is achieved for h-BN coated surfaces at heat flux 354 W/cm2.

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