Abstract
The differential pressure (ΔP) should be generated by a pair of rotating disc with partial hollow across the two separated space where temperature is different. When the difference of temperature (ΔT) is very low as several decades, generated ΔP falls below to thousands of Pa. Conversion from low ΔP to the electric power is accomplished by the vibrational voice coil generater (VCG) with high efficiency only when the frequency of the vibration reaches to some level. To obtain a high frequency of ΔP, the rotating discs are driven by an electric motor and the number of hollows should be multiplied by odd. The theoritical analysis is attempted for a simple model. Above mentioned high speed ΔP generator meets to the energy recovery system from the low ΔT heat sources to the electric power.
