Patent ID: 7950230
Filing Date: 2011-05-31
Classification: F01K,F02G,Y02T

Abstract:
1. A waste heat recovery apparatus which utilizes waste heat from a heat generating device, comprising: a Rankine cycle which includes a pump for circulating an operation fluid, a heater for heating the operation fluid by the waste heat, an expansion unit for converting energy of expansion of the heated operation fluid into mechanical energy, and a condenser for condensing and liquefying the expanded operation fluid; a temperature detector which detects a temperature of the operation fluid flowing into the expansion unit; an inlet-side pressure detector which detects pressure on an inlet side of the expansion unit; an outlet-side pressure detector which detects pressure on an outlet side of the expansion unit; and Rankine operation control means for controlling an command rotational speed of the expansion unit based on superheated degree information on the inlet side of the expansion unit and pressure information, the superheated degree information being obtained from the temperature of the operation fluid detected by the temperature detector and the inlet-side pressure detected by the inlet-side pressure detector, and the pressure information being obtained by considering the outlet-side pressure detected by the outlet-side pressure detector.