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.
To meet the requirement of electronic heat dissipation with high heat flux, a kind of heat dissipation device using pulsating heat pipe (PHP) for CPU heat dissipation was put forward. The heat transfer performance and surface temperature distribution of the radiator are analyzed by analyzing the wall temperature distribution and the distribution of the evaporator and condenser of the PHP. The experimental results show that the change of wind speed has obvious influence on the operation of the PHP radiator. The surface temperature distribution of the PHP radiator is very uniform, which is especially beneficial for CPU cooling. The heat transfer performance of the PHP is better, and the minimum average thermal resistance is 0.19 k/W. In addition, there is no drying phenomenon when the temperature reaches about 120 °C, which indicates that the pulsating heat pipe has a very high heat transfer limit.
With the continuous development of industrial technology, the safety and efficiency of thermal equipment work in related industries and industrial fields are facing many problems. First, with the improvement of integrated level, the size of electronic components is getting smaller and smaller, and the heat load per unit area is increasing, which makes the traditional heat dissipation method difficult to meet the requirements; second, with the increase of energy-saving pressure, the temperature difference of low-temperature waste heat recovery is reduced, and the traditional heat exchange equipment is difficult to meet the working requirements. The pulsating heat pipe has the characteristics of small volume and excellent heat transfer performance. In view of the heat transfer performance of the pulsating heat pipe, we designed the gas-liquid pulsating heat pipe heat exchanger and studied its heat transfer performance, which has been verified to be effective.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.