The developed rotary heat exchanger has three principal functions as follows, a blower, a heat exchanger and a pump. Structure is similar to cross flow fan. The blades also work as heat transfer surfaces. Further more, this rotor is equipped many circular tubes, liquid collection and distribution tanks to flow the cooling liquid. So previous studies about cross flow fans are not able to apply to this type of rotor directly. We prepared various samples which have different parameters in rotor diameter, length, diameter ratio of inner to outer and fin pitches. Throughout series of studies, we found the relation between the airflow rate and various parameters that mentioned before. A stationary guide impeller attached to the outlet side of rotor and a rotary impeller attached to the inlet side are necessary to support the pumping action. And we indicate the relation between the water flow rate and the impeller's shapes.