This paper describes a study on 10 kW-class Loop Heat Pipe (LHP) which is a two-phase heat transfer device. In this study, the 10 kW-class LHP was designed, fabricated, and tested. Condenser was cooled under stagnant water condition and forced water convection, and we evaluated steady state temperature. It was experimentally confirmed that this LHP can transport 9.5 kW heat in the steady state under stagnant water condition, a temperature of heater blocks being within 300°C. Then the thermal resistance at 9.5 kW was 0.006 °C/W. Finally, the steady experimental results were compared with calculation results and the maximum absolute error of heater blocks temperature was 22°C.

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This study describes the 40 mm scale small axial fan P - Q curves mounted in high-density packaging electronic equipment. An accurate prediction of supply flow rate by fans strongly affects the reliability of the cooling design. However, in high-density packaging electronic equipment, the fan performance is affected by the mounting components around the fans, and the accurate prediction of the supply flow rate becomes difficult. In this paper, by a CFD analysis, visualization around the fan impellers with the obstructions was conducted. By comparing the predicted result of the P- Q curves by the proposed analytical method and experiment, the proposed analysis's effectiveness was evaluated.

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