Patent ID: 7150313

Claim:
A heat dissipation device, comprising: a cooling fan comprising an outlet; and a plurality of heat dissipation fins disposed at the outlet to exhaust heat on the heat dissipation fins with an airflow generated by the cooling fan, wherein all of the heat dissipation fins have a same fin height and a same fin length, and each fin space between adjacent heat dissipation fins is adjusted to form a uniform velocity for the airflow between adjacent pairs of the fins, and wherein the spaces are adjusted by a head loss equation H=f×L×V 2 /(Dh×2g), where H is a head loss design value, f is a friction factor, L is the fin length, V is a velocity of the airflow, g is an acceleration of gravity, and Dh is 4*(width of the space)*(the fin height)/(2*(the width of the space+the fin height)).