Energy storage spreader

Can thermal packaging with a heat spreader effectively dissipate heat?

The thermal packaging with a boiling-driven heat spreader proposed in this study provides an extended heat transfer path that can effectively dissipate heat without increasing the weight or volume in high heat flux conditions. Fig. 2 shows an air-cooled thermal management device with a heat spreader.

What are the results of thermal packaging with a solid copper heat spreader?

Also, the results of the thermal packaging with a solid copper heat spreader instead of boiling-driven heat spreaders are described in Fig. 8 (c). The test results show the temperature with variation in input power.

Can a boiling-driven heat spreader improve thermal management?

The boiling-driven heat spreader with rib-type supports confirmed that a temperature change occurred due to boiling incipience. Still, the thermal resistance at each heater position did not change significantly. This study shows that effective thermal management can be achieved with an improved design of a boiling-driven heat spreader.

How does heat spreader work?

So, when the heat spreader starts to operate, the temperature of heaters 2 to heater 4 decreases, and the temperature of heater 1 rises. But, heater 6 has no evidence of boiling occurrence, such as a sudden temperature drop in the boiling region.

What are the different types of heat spreaders?

The two types of fully fabricated boiling-driven heat spreaders and solid copper (ASTM C11000) of the same size are also made for thermal performance comparison, and specifications are listed in Table 1. Fig. 3.

What are the limitations of a heat spreader?

The main limitation of the heat spreader is a malfunction at the critical heat flux (CHF) . The two-phase heat spreader commonly works by two heat transfer phenomena: evaporation and condensation of the working fluid. The CHF refers to the maximum heat flux without malfunction due to the local dryout at the evaporation surface.