| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigerant natural circulation type heat transport device capable of improving cooling performance by using a refrigerant in a supercritical state, and preventing deterioration of heat exchange performance even when there is no change of phase of the refrigerant. SOLUTION: In the heat transport device, a heat receiving side heat exchanger 2, a heat dissipation side heat exchanger 1 arranged higher than the heat receiving side heat exchanger 2, and pipes 3 and 4 are annularly connected, and it is composed so that a sealed refrigerant is naturally circulated through the pipe 3 and 4 by density change. In the heat transport device, when carrying out heat transport at an operation temperature including a temperature range wherein the refrigerant becomes a supercritical state, a flow direction of the refrigerant of the heat receiving side heat exchanger 2 is provided in a direction opposite to flow directions 53 and 54 of a fluid to be subject to heat exchange, and heat exchange is carried out by sending the fluid to be subjected to heat exchange from a high temperature side to a low temperature side of the refrigerant in relation to change from low temperature to high temperature of the refrigerant in the supercritical state in the heat receiving side heat exchanger 2. COPYRIGHT: (C)2005,JPO&NCIPI
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