FUEL COOLING APPARATUS

A fuel cooling apparatus (100) includes a fuel cooling pipe (110) having an inner circumferential surface and a hermetically sealed space formed therein and a heat pipe (120) allowing a working medium to flow therein. The heat pipe includes an evaporation region (122)inserted into the hermetically sealed space of the fuel cooling pipe so that a fuel passage (150) is formed between the evaporation region and the inner circumferential surface of the fuel cooling pipe. The evaporation region evaporates the working medium by heat exchange with a fuel flowing through the fuel passage. The heat pipe also includes a condensation region (124) for condensing the working medium evaporated at the evaporation region and an adiabatic region (126) adiabatically connecting the evaporation region and the condensation region to each other.