Heat Transfer Formula:
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Definition: This calculator estimates the heat transfer rate from a flat plate heat sink based on the heat transfer coefficient, surface area, and temperature difference.
Purpose: It helps engineers and designers determine the thermal performance of flat plate heat sinks in electronic cooling applications.
The calculator uses the formula:
Where:
Explanation: The heat transfer coefficient multiplied by the surface area and temperature difference gives the heat dissipation capacity.
Details: Proper heat sink sizing ensures electronic components operate within safe temperature limits, improving reliability and lifespan.
Tips: Enter the heat transfer coefficient (typically 5-25 W/m²K for natural convection), surface area in square meters, and temperature difference in Kelvin. All values must be > 0.
Q1: What's a typical heat transfer coefficient for flat plates?
A: For natural convection in air, typical values range from 5-25 W/m²K depending on orientation and surface finish.
Q2: How do I measure surface area?
A: Calculate the total exposed surface area including fins if present. For simple plates, it's length × width × number of sides.
Q3: What temperature difference should I use?
A: Use the difference between the heat sink base temperature and ambient air temperature.
Q4: Does this account for radiation?
A: No, this is for convective heat transfer only. For radiation, additional calculations are needed.
Q5: How accurate is this calculation?
A: It provides a basic estimate. For precise results, consider computational fluid dynamics or experimental testing.