Experimental study on novel pulsating heat pipe radiator for horizontal CPU cooling under different wind speeds

Abstract

Herein, a horizontal CPU cooler with a pulsating heat pipe (PHP) for cooling desktop computer was developed. In the experiment, an electric heating block was used to heat a copper plate to simulate the heating process of CPUs. The cooling system consists of a cooling fan and a pulsating heat pipe cooler. The influence of cooling wind speed and heat load on heat transfer performance, start-up performance, and temperature uniformity of the PHP cooler was analyzed by controlling variable method. The wind speed was set to be 0 m/s, 0.1 m/s, 0.3 m/s, 0.5 m/s and 0.7 m/s respectively. The contour plots were used to analyze the uniformity of temperature distribution due to cooler. The results show that the start-up of the PHP led to a decrease in temperature of CPUs. As the cooling wind speed increased, the start-up time of the php dropped, the start-up temperature dropped, and its stability was also improved. The operation at different cooling wind speeds also changed the start-up mode of the PHP. The start-up performance was best at cooling wind speed of 0.3 m/s. The contour plot for temperature showed that the temperature distribution of the PHP cooler became more uniform with increased cooling wind speeds. There was excellent temperature uniformity at the cooling wind speeds of 0.3 m/s and 0.7 m/s. When the cooling wind speed was 0.7 m/s, the minimum average thermal resistance was 0.51 K/W.

Experimental Study on the Influence of Wind Speed on the Start-Up Characteristics and Thermoelectric Generation Characteristics of Gravity Heat Pipe in Gangue Dump

“…Based on the relationship between wind speed and temperature curve mentioned above, it aligns with references [21,32,33]. The analysis demonstrates that wind speed has a significant impact on the temperature, power generation, and internal pressure of the GHP.…”

“…Additionally, the wind field can promote working fluid circulation in heat pipes. Increased cooling wind speed leads to decreased start-up time and temperature for pulsating heat pipes, while stability improves [21,22]. These distinctive properties lay the foundation for the application of GHPs in controlling the environmental conditions within gangue dumps.…”

Passive Cooling Solutions for High Power Server CPUs with Pulsating Heat Pipe Technology: Review

“…Figure 9 depicts that the heat source temperature of the aluminum finned radiator is higher than the limited temperature of CPU (70 °C), reaching 81.6 °C when the input power is 80 W. While the heat source temperature value of the vertical radiator is 64.3 °C, and the temperature distribution is more uniform, showing excellent heat dissipation performance. Shang et al (2021) developed a PHP-based CPU cooler and carried out experimental research on it, as shown in Figure 10. The conclusion shows that when the cooling wind speed is 0.3 m/ s, the startup time is the shortest, the startup temperature is the lowest (only 34.0 °C), and the startup performance reaches the best state.…”

“…FIGURE 11 | (A) Thermal resistance and (B) average temperature in the evaporation section with different wind speeds for the PHP CPU cooler(Shang et al, 2021).…”

Improvement in Laptop Heat Dissipation with Taguchi Method

“…Furthermore, a complete experiment on the relationship between the heat dissipation capacity and the fan speed was conducted [15]. It suggested that higher fan speeds result in more heat dissipation, which can help mitigate the risk of thermal overload and potential collapse of the heat dissipation system by enhancing its ability to remove heat from the components.…”