Abstract
A vapor-pressure-driven heat pipe is devised for sideward heat transport over a long distance. The present heat pipe is composed of a heated section, a cooled section, a reservoir, valves and pipes connecting these components. Inside the heat pipe, a condensate is returned by utilizing the vapor pressure of a working fluid. By the experiment, it is confirmed that the heat pipe works periodically corresponding to the valve operation, and the heat is transported sideward continuously from the heated section to the cooled section. The present heat pipe is effective for a large-scale thermal management.