Ultra Fast Spray Cooling and Critical Droplet Daimeter Estimation from Cooling Rate | Zendy

Muhammad Aamir | Zendy; Qiang Liao | Zendy; Zhu Xun | Zendy; Hong Wang | Zendy; Muhammad Zubair | Zendy

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Ultra Fast Spray Cooling and Critical Droplet Daimeter Estimation from Cooling Rate

Author(s) -

Muhammad Aamir,

Qiang Liao,

Zhu Xun,

Hong Wang,

Muhammad Zubair

Publication year - 2014

Publication title -

journal of power and energy engineering

Language(s) - English

Resource type - Journals

eISSN - 2327-5901

pISSN - 2327-588X

DOI - 10.4236/jpee.2014.24037

Subject(s) - materials science , mechanics , mechanical engineering , metallurgy , thermodynamics , engineering , physics

Spray cooling is an effective tool to dissipate high heat fluxes from hot surfaces. This paper thoroughly investigates the effects of spray parameters on the cooling time and cooling rate under varying inlet pressure using water as the coolant. Cylindrical samples of stainless steel with constant diameter, D = 25 mm, and thickness δ: 8.5 mm, 13 mm, 17.5 mm and 22 mm were investigated. Critical droplet diameter to achieve an ultrafast cooling rate of 300°C/s was estimated by using analytical model for samples of varying thickness. At an inlet pressure of 0.8 MPa, maximum cooling rates of 424.2°C/s, 502.81°C/s and 573.1°C/s were achieved for wall super heat ΔT = 600°C, 700°C and 800°C respectively.

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