A 40 W microprocessor is to be cooled by a heat sink. If the device is...
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A 40 W microprocessor is to be cooled by a heat sink. If the device is not to rise above 80 °C to avoid damage, which of the heat sinks on the table below would be suitable if the air temperature around the device is 30 °C? Justify your answer. R = 0.9°C/W (vertical) R = 1.2°C/W (horizontal) HS 5030 Dimensions: 76 mm x 105 mm x 44 mm Surface area: 677 cm2 HS 6065 R = 5°C/W Dimensions: 76 mm x 38 mm x 24 mm Surface area: 387 cm? R = 1.4°C/W (vertical) R = 1.8°C/W (horizontal) HS 6071 Dimensions: 76 mm x 92 mm x 26 mm Surface area: 968 cm? HS 6105 R = 1.8°C/W (vertical) R = 2.1°C/W (horizontal) Dimensions: 76 mm x 127 mm x 91 mm Surface area: 677 cm2 HS 6115 R = 1.1°C/W (vertical) R = 1.3°C/W (horizontal) Dimensions: 76 mm x 102 mm x 25 mm Surface area: 929 cm? HS 7030 R = 2.9°C/W (vertical) R = 3.1°C/W (horizontal) Dimensions: 76 mm x 97 mm x 19 mm Surface area: 290 cm? A 40 W microprocessor is to be cooled by a heat sink. If the device is not to rise above 80 °C to avoid damage, which of the heat sinks on the table below would be suitable if the air temperature around the device is 30 °C? Justify your answer. R = 0.9°C/W (vertical) R = 1.2°C/W (horizontal) HS 5030 Dimensions: 76 mm x 105 mm x 44 mm Surface area: 677 cm2 HS 6065 R = 5°C/W Dimensions: 76 mm x 38 mm x 24 mm Surface area: 387 cm? R = 1.4°C/W (vertical) R = 1.8°C/W (horizontal) HS 6071 Dimensions: 76 mm x 92 mm x 26 mm Surface area: 968 cm? HS 6105 R = 1.8°C/W (vertical) R = 2.1°C/W (horizontal) Dimensions: 76 mm x 127 mm x 91 mm Surface area: 677 cm2 HS 6115 R = 1.1°C/W (vertical) R = 1.3°C/W (horizontal) Dimensions: 76 mm x 102 mm x 25 mm Surface area: 929 cm? HS 7030 R = 2.9°C/W (vertical) R = 3.1°C/W (horizontal) Dimensions: 76 mm x 97 mm x 19 mm Surface area: 290 cm?
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Related Book For
Fundamentals of Thermal-Fluid Sciences
ISBN: 978-0078027680
5th edition
Authors: Yunus A. Cengel, Robert H. Turner, John M. Cimbala
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