Maurice Tutor

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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 27 Feb 2018 My Price 5.00

spherical junction diameter

A thermocouple, with a spherical junction diameter of 0.5 mm, is used for measuring the temperature of hot air flow in a circular duct. The convection heat transfer coefficient of the air flow can be related with the diameter (D) of the duct and the average air flow velocity (V) as h = 2.2(V/D)0.5, where D, h, and V are in m, W/m2·K and m/s, respectively. The properties of the thermocouple junction are k = 35 W/m·K, ρ = 8500 kg/m3 , and cp = 320 J/kg·K. Determine the minimum air flow velocity that the thermocouple can be used, if the maximum response time of the thermocouple to register 99 percent of the initial temperature difference is 5 s.

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Maurice Tutor
(5)
Status NEW Posted 27 Feb 2018 07:02 PM My Price 5.00

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