A vertical array of circuit boards of 150-mm height is to be air cooled such that the
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A vertical array of circuit boards of 150-mm height is to be air cooled such that the board temperature does not exceed 60°C when the ambient temperature is 25°C.
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Assuming isothermal surface conditions, determine the allowable electrical power dissipation per board for the cooling arrangements:
(a) Free convection only (no forced airflow).
(b) Airflow with a downward velocity of 0.6 m/s.
(c) Airflow with an upward velocity of 0.3 m/s.
(d) Airflow with a velocity (upward or downward) of 5 m/s.
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KNOWN Vertical array of circuit boards 015m high with maximum allowable uniform surface temperature for prescribed ambient air temperature FIND Allowable electrical power dissipation per board qWm for ...View the full answer
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Related Book For 
Fundamentals of Heat and Mass Transfer
ISBN: 978-0471457282
6th Edition
Authors: Incropera, Dewitt, Bergman, Lavine
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