Abstract: A compact two-stage evaporator waste heat recovery (WHR) device (7) is disclosed, and a system using the device. The device recovers energy from waste heat passing through the device and transfers that energy to a Rankine Cycle working fluid also passing through the device. The device includes a first and second evaporator (15); and, a state separator (17) connected between the outlet of the first evaporator and the inlet of the second evaporator. The state separator (17) separates the working fluid into liquid and vapor. The liquid is re-cycled to the inlet of the first evaporator (15); the vapor is sent to the inlet of the second evaporator (19) for superheating. An overall WHR system using the device further includes an expander (21), condenser (23), and pump (25). The system further includes control circuitry (26) for controlling operation of the waste heat recovery device (7) itself and the WHR system.

Abstract: The present invention relates to a Rankine system comprising a valve including a valve member. The valve member is provided with a valve controlling element in the form of an elongated tapered end portion with a tip end facing the duct, wherein the tapered end portion is arranged to be inserted through the opening and into the duct as the valve member is moved towards the valve seat. The actuator is configured to hold the valve member in at least one intermediate position between the first and second end positions, where the tapered end portion occupies a portion of a cross-sectional fluid through-flow area defined by the duct so as to partly restrict a flow of fluid through the duct.

Abstract: The present invention relates to a Rankine system comprising a valve including a valve member. The valve member is provided with a valve controlling element in the form of an elongated tapered end portion with a tip end facing the duct, wherein the tapered end portion is arranged to be inserted through the opening and into the duct as the valve member is moved towards the valve seat. The actuator is configured to hold the valve member in at least one intermediate position between the first and second end positions, where the tapered end portion occupies a portion of a cross-sectional fluid through-flow area defined by the duct so as to partly restrict a flow of fluid through the duct.