Loop heat pipe technology for electronics cooling

Loop heat pipes (LHPs) are passive heat transport devices with the capillary-driven circulation of the two-phase working fluid. LHPs currently used mainly in Aerospace applications due to their relatively high fabrication cost. LHPs outperform conventional heat pipes in terms of the maximum heat transport capability, operation in any orientation in the gravity field, and heat transport length. It can be advantageous to use loop heat pipes for transporting, spreading, and dissipating heat in modern electronics, where the heat dissipation per unit volume is rapidly increasing This paper describes some LHP design features and experimental results obtained for two low-cost LHPs.