Find the maximum operating ambient temperature after installing the heat sink.


184 J = 23. 4192.


q = heat transferred per unit time (W) A = heat transfer area of the surface (m 2) h c = convective heat transfer coefficient of the process (W/(m 2 K) or W/(m 2 ° C)) T s = Temperature surface T.

. Ideally, during this measurement, close to 100% of the power should flow from the junction to the point ‘X’. .

5 x the measured CFM x Delta enthalpy = BTU output.

As an alternative, you can calculate the junction temperature using junction-to-case thermal resistance (Θ JC) and case-to-ambient thermal resistance (Θ CA ), as shown in Figure 1. May 21, 2023 · Nowadays, heat dissipation in electronic devices is one of the serious issues to be resolved in energy and environmental terms. Three types of losses (dielectric, elastic, and piezoelectric) are known to be related.

. In order to test the heat dissipation performance of the LHP system of the composite heat sink, the experiment bench is shown in Fig.

413 BTU/hr.


. .

. 1 (e-f) is the schematic diagram of the heat dissipation performance test, and Fig.

5 x the measured CFM x Delta enthalpy = BTU output.
In this paper, we present a study of micro structuring on polymer-based flexible substrate coupled with aluminum-alloy heat sink.

3 J/kg·K × 1kg × 40K)/600s = 278.

Resolution: To calculate heat dissipation, multiply watts by 3.

The heat dissipation is – for the same material – also stronger, the larger the effective area is through which the heat is transported. In the question he found out the heat as 4 joule per second and then as given voltage was equal to 2 volts. .

. . In both cases, power dissipation is 5W, regardless of whether we calculate it using voltage and current or current and resistance. The fin is exposed to a flowing fluid, which cools or heats it, with the high thermal conductivity allowing increased heat being conducted from the wall. 184 J = 23.


T2 = heat-sink temperature (Thermal resistance is commonly expressed in units of °C/W or “degree-C per Watt”) Thermal impedance (Z) is defined as the temperature gradient per unit of heat flux, (q /A), passing through the interface. .

= British Thermal Units/hour.



Simply apply the formula.