A condensate and feedwater system includes: a deaerator circulation pump that returns condensate water flowing out from a deaerator to a part of a condensate line between a heater and the deaerator; an apparatus to be supplied with part of the condensate water flowing from the heater toward the deaerator, through a supply line branched from the condensate line; a supply line shutoff valve that switches between communication and interruption of the supply line; and a controller that controls opening/closing of the supply line shutoff valve and driving/stopping of the deaerator circulation pump. The controller closes the supply line shutoff valve from an open state at normal operation and at least temporarily drives the deaerator circulation pump from a stopped state at normal operation, in condenser throttling in which supply of extraction steam of a steam turbine to the heater and the deaerator is reduced as compared to that at normal operation and a deaerator water level control valve is closed.

A combined heat and power system is provided with a Rankine cycle passage, a heat medium passage, an evaporator, an expander, a condenser, a pump, a temperature sensor, a sensor, and a controller. The evaporator receives the heat from the heat medium to heat a working fluid. The temperature sensor detects the temperature of the heat medium after radiating heat for heating the working fluid. The sensor detects the pressure of the working fluid flowing between the outlet of the evaporator and the inlet of the expander. The controller adjusts the rotation speed of the pump based on the temperature detected by the temperature sensor, and in addition, adjusts the rotation speed of the expander based on the pressure detected by the sensor.

A waste-heat recovery system may include a waste-heat recovery circuit in which a working fluid is circulatable and which has a high pressure region and a low pressure region. The system may also include a conveying device configured to drive the working fluid, a steam generator configured to evaporate the working fluid, an expansion machine configured to expand the working fluid via mechanical work, at least one condenser configured to condense the working fluid, a container arranged downstream of the at least one condenser, and a divider arranged in a container interior of the container which may divide the container interior into a first sub-chamber and a second sub-chamber. The second sub-chamber may be Tillable with a coolant, which is introducible into the at least one condenser fluidically separately from the working fluid via a fluid line, such that the working fluid is condensable via thermal interaction with the coolant.

The present invention is a device and method for controlling a closed loop (10) working on a Rankine cycle comprising a compression and circulation pump (12) for the liquid fluid, a heat exchanger (20) swept by a hot source (C) for evaporation of the fluid, expansion device (32) for the fluid in vapor form, a cooling exchange (44) swept by a cold source (F) for condensing the working fluid, a working fluid receiving tank (50) and working fluid circulation lines (60, 62, 64, 66, 68). The tank (50) is connected to a pressure regulating system (52, 54).

Disclosed are power generation apparatuses. An exemplary power generation apparatus (1) is configured such that water vapor generated in a steam generator (2) is supplied to a scroll expander (3) to drive the scroll expander, wherein: a condensation device (5) is arranged in a discharge path (12) downstream of the scroll expander, the condensation device being configured to mix water vapor having passed through the scroll expander directly with cooling water to condense the water vapor; and the condensation device includes a control unit (10) that performs a control of adjusting the amount of cooling water supply so as to obtain condensed water having a predetermined temperature.

A binary cycle power generation system includes a working fluid circulation line, an evaporator, an expander, an energy recovery apparatus, a condenser, and a pump. The pump includes a casing, a rotary shaft, and impellers. The casing is hollow and has an end wall at an end in a longitudinal direction. The rotary shaft has an axis extending in the longitudinal direction of the casing, is supported on the end wall, has at least a part that is in the casing, and rotates owing to a torque. The impellers are attached to the rotary shaft one after another in the longitudinal direction. The pump is arranged in such a way that the axis of the rotary shaft intersects a vertical direction.

A steam cycle system includes a heat recovery steam generator (HRSG) which receives exhaust gases, a steam turbine coupled to the HRSG which receives a first steam flow generated by the HRSG, and a condenser which condenses a second steam flow output by the steam turbine. The condenser includes a plurality of heat exchanger tubes, a fan, and a steam collection header. The system includes one or more sensors which measure one or more properties of the steam flow. The system includes a closed-loop controller communicatively coupled to the one or more sensors. The controller receives data from the one or more sensors, determines a flow rate of the second steam flow through the steam header using the one or more sensors, calculates whether the flow rate of the steam is within a threshold, and adjusts one or more operating parameters of the fan.

A waste-heat recovery system may include a waste-heat recovery circuit in which a working fluid is circulatable and which has a high pressure region and a low pressure region. The system may also include a conveying device configured to drive the working fluid, a steam generator configured to evaporate the working fluid, an expansion machine configured to expand the working fluid via mechanical work, at least one condenser configured to condense the working fluid, a container arranged downstream of the at least one condenser, and a divider arranged in a container interior of the container which may divide the container interior into a first sub-chamber and a second sub-chamber. The second sub-chamber may be Tillable with a coolant, which is introducible into the at least one condenser fluidically separately from the working fluid via a fluid line, such that the working fluid is condensable via thermal interaction with the coolant.

Described herein are technologies of a heat engine that transforms a low-level temperature differential between a heat source and a heat sink into useful electrical power. One heat engine includes a hydro-electric turbine, a steam source configurable to generate steam from a hot water source, a condenser, and a slug intake bend in a first pipe coupled between the steam source and the condenser. The slug intake bend is configurable to receive a slug of water from a cold water source. The steam from the hot water source pushes the slug of water up a vertical distance to the condenser. The condenser is configurable to receive the slug of water and the steam and provide liquid water from the slug of water and steam to power the hydro-electric turbine.

The once-through boiler includes a water supply and at least an economizer, an evaporator superheater. No valves are provided between the economizer, the evaporator and the superheater. The high-pressure turbine includes a control valve. The method for low load operation of a power plant with a once-through boiler and a high pressure turbine includes providing a parameter indicative of the stable operation of the once-through boiler in once-through operation, and on the basis of this parameter adjusting the control valve in order to regulate the pressure within the economizer and evaporator and/or adjusting the temperature of the water supplied to the economizer.