Consider the electronic elements that are cooled byforced
Chapter 6, Problem 6.40(choose chapter or problem)
Consider the electronic elements that are cooled byforced convection in 6.39. The cooling systemis designed and tested at sea level (p1 atm), but thecircuit board is sold to a customer in Mexico City, withan elevation of 2250 m and atmospheric pressure of76.5 kPa.(a) Estimate the surface temperature of the chiplocated 120 mm from the leading edge of the boardwhen the board is operated in Mexico City. Thedependence of various thermophysical propertieson pressure is noted in 6.22.(b) It is desirable for the chip operating temperature tobe independent of the location of the customer.What air velocity is required for operation inMexico City if the chip temperature is to be thesame as at sea level?
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