Pulsating heat pipe and embedded heat pipe heat spreaders for modular electronics cooling
Year: 2023
Type: article
Abstract: Two-phase-based heat spreaders are highly sought electronics cooling solutions due to their superior thermal performance over conventional conduction plates. Along with good thermal performance, PHPs potentially have thickness, shape matching and cost benefits over conventional heat pipe heat spreader solutions. In this manuscript, the thermal performance of PHP charged with three different fluids- propylene, R245fa, and acetone was experimentally determined for different sink temperatures and compared to an embedded heat pipe heat spreader. A mathematical model to predict the thermal performance of the PHP was developed and validated against experimental results. It was found that at low sink temperatures PHP charged with propylene performs better than or similar to embedded heat pipe heat spreader with up to 7.8 times higher effective thermal conductivity over conduction plate. However, at moderate temperatures above > 40 °C, propylene PHP dries out faster than the embedded heat pipe plate. PHP performance with R245fa and acetone improves with increasing heater power. Effective thermal conductivity improved by 2.5 times with R245fa PHP and by 4 times with acetone PHP over the conventional plate but was lower than embedded heat pipe plate whose effective thermal conductivity was 17.3 times higher.
Institution: Advanced Cooling Technologies (United States)
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,030
OpenAlex ID: W4383100460