To make a whole number conduct a uniform heat exchange, differing from the case of in the 1 conventional structure wherein lines of tubes are provided in the member or wherein fins are formed or provided, to enlarge remarkably the area of heat transfer with a heat exchange medium for a unit volume, in addition, and thereby to enhance a heat exchange performance to a great degree, by a method wherein uniform and abundant minute pores which a porous metal singer has is made passage of a fluid.
At least a part of a member is formed of a porous metal sinter (metal porous body) and minute through holes distributed uniformly and abundantly in the porous body are made passages of a medium for heat exchange. The metal porous body is preferably a hot isostatic pressing sinter having a porosity of 7-50% and a pore size of 500μm or less and having a pore distribution wherein a pore size D5 in the cumulative frequency of 5% on an integrated distribution curve of the pore size, a pore size D50 in the cumulative frequency of 50% and a pore size D95 in the cumulative frequency of 95% satisfy a formula (D95-D5)/D50≤2.5. For the porous body, a mixed-phase sinter of the kind of metal material (iron ally, Ni alloy, Co alloy or the like) having low thermal conductivity and of the kind of metal material (A1 alloy, Cu alloy or the like) having high thermal conductivity is used according to a request.
FUNAKOSHI ATSUSHI
NISHI TAKASHI
KOSAKA AKIRA
MOTOKI RYUTARO
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