In response to the demand for cooling solutions in data centers with the burgeoning growth of the information era,it is imperative to explore a high-performance and energy-saving thermal management system.In this pape...In response to the demand for cooling solutions in data centers with the burgeoning growth of the information era,it is imperative to explore a high-performance and energy-saving thermal management system.In this paper,a copper-water pump-assisted loop heat pipe based on a top-down superhydrophilic multiscale composite wick-channel structure is investigated to optimize the stability and operation range in the loop heat pipe(LHP).Aided by theoretical pressure analysis,it has been demonstrated that this composite structure enhances the durability and maintenance of the large capillary pressure head.The comparison has analyzed the effects of heat leakage on the compensation chamber and the phase change in channels by establishing system thermal resistance networks.The results show that the pump-assisted loop heat pipe(P-A LHP)exhibits lower baseplate temperature fluctuation within 0.5℃and a larger operation range of more than 400 W below the baseplate temperature of 85℃.In addition,the P-A LHP elevates heat transfer capacity to 430 W by increasing the mass flow rate,and the minimum thermal resistance of 0.130℃/W is achieved compared with the LHP minimum thermal resistance of 0.217℃/W.Finally,the maximum P-A LHP coefficient of performance is 22.7 under the small mass flow rate,which is larger than most registered active cooling systems.展开更多
基金supported by the National Natural Science Foundation of China Project(Grant No.52006218).
文摘In response to the demand for cooling solutions in data centers with the burgeoning growth of the information era,it is imperative to explore a high-performance and energy-saving thermal management system.In this paper,a copper-water pump-assisted loop heat pipe based on a top-down superhydrophilic multiscale composite wick-channel structure is investigated to optimize the stability and operation range in the loop heat pipe(LHP).Aided by theoretical pressure analysis,it has been demonstrated that this composite structure enhances the durability and maintenance of the large capillary pressure head.The comparison has analyzed the effects of heat leakage on the compensation chamber and the phase change in channels by establishing system thermal resistance networks.The results show that the pump-assisted loop heat pipe(P-A LHP)exhibits lower baseplate temperature fluctuation within 0.5℃and a larger operation range of more than 400 W below the baseplate temperature of 85℃.In addition,the P-A LHP elevates heat transfer capacity to 430 W by increasing the mass flow rate,and the minimum thermal resistance of 0.130℃/W is achieved compared with the LHP minimum thermal resistance of 0.217℃/W.Finally,the maximum P-A LHP coefficient of performance is 22.7 under the small mass flow rate,which is larger than most registered active cooling systems.
