Abstract: A steam power plant is provided. The steam power plant includes a bypass pipeline which connects the fresh steam line flow to the exhaust steam line, wherein a bypass steam cooler is disposed in the bypass pipeline. In the event of an emergency stop, or a startup, or a shutdown, the bypass steam cooler cools the steam flowing into the bypass pipeline, whereby cheaper materials may be used for the bypass pipeline.

Abstract: The invention relates to a method for operating a steam power station and a power plant as well as a corresponding steam power station. According to the invention, essentially all of the water that is drained from at least one pressure stage of the steam power station is collected, stored, and recirculated into the water circuit of steam power station.

Abstract: A thermal power generation apparatus comprises a boiler (15) and multiple turbine sets for high, intermediate and lower steam pressure operation. Steam exhausted from the high pressure turbine (HP), and reduced in both pressure and temperature, is returned to a reheater (19) for reheating. The reheated steam is then passed to a intermediate pressure turbine (IP). It is desirable to control the temperature of steam entering the intermediate pressure turbine (IP). The invention provides a system for effecting temperature control of the reheater stream in a thermal power plant. The system includes a reheater conduit (10, 21) adapted to define at least a part of a reheat flow path for steam between an exhaust of a high pressure turbine system (HP) and an inlet of a reheater system (19). The system further includes an indirect water/steam heat exchanger (B) having a heat exchange portion within the reheat flow path and defining a water flow path means adapted to receive and circulate feed water.

Abstract: The present invention relates to the processing of biomass, particularly but not exclusively poultry litter, to generate energy. A method is presented for generating power from biomass comprising a gasification process (44) involving the gasification of biomass to produce a combustible fuel gas and a power generation process (49) involving combustion of the combustible fuel gas to produce a combustion exhaust gas which is fed to a power generator (49) to generate power and a generator exhaust gas. The method further comprises placing compressed air (1) in thermal contact with the generator exhaust gas (47) to facilitate heat transfer between the compressed air and the generator exhaust gas, and feeding a first portion of compressed air that has thermally contacted the generator exhaust gas to the gasification process to assist in gasification of further biomass.

Abstract: A controller reduces a rotational speed of a Rankine cycle from a predetermined normal rotational speed during an operation of a compressor in a predetermined state when the controller determines that a predicted refrigerant flow quantity, which is predicted by assuming that the compressor is operated in a sole operation of the Rankine cycle at the predetermined normal rotational speed of the Rankine cycle, exceeds a predetermined flow quantity. The predetermined state is a state that satisfies a predetermined condition, which relates to the sole operation of the Rankine cycle.

Abstract: A method for heating a valve configuration of a steam turbine, includes the steps of directing steam to a closed valve of the valve configuration, condensing the steam in the valve, and discharging the condensate. The temperature is kept at the saturated-steam temperature corresponding to the respective steam pressure. The method is in particular suited for keeping a bypass-valve configuration hot. The bypass-valve configuration is intended for bypassing the steam turbine on the steam side. For this purpose, a steam line is connected to the valve configuration. The steam line has an inclined line section with a rising slope or a falling slope directly upstream of the valve configuration. A valve configuration for a steam turbine is also provided.

Abstract: In a power generating installation including a steam turbine-generator system, a source of steam under pressure, and a steam conditioning unit, the steam turbine-generator system including a high pressure turbine and at least one low pressure turbine, each turbine having a steam inlet and an exhaust outlet, and an output shaft coupled to all turbines, and the steam conditioning unit being connected between the exhaust outlet of the high pressure turbine and the steam inlet of each low pressure turbine and being effective to remove moisture from, and reheat, steam flowing between the exhaust outlet of the high pressure turbine and the steam inlet of the low pressure turbine, the steam conditioning unit is composed of two structurally separate devices which include a reheating device which functions exclusively to add heat to the steam and a moisture separating device which acts to remove moisture from the steam.

Abstract: In a wet-steam turbine plant, which comprises a high-pressure turbine (1), at least one low-pressure turbine (3), and a generator (4), and in which a high-velocity water separator (6) is provided in the connecting line (2) between the high-pressure turbine (1) and the low-pressure turbine (3), a reheater (7), of space-saving design, is located downstream of the water separator (6), between the lower and upper cross-connecting lines (2). The reheater (7) is connected in a manner such that the heating steam is admitted to it in cross-flow, and possesses a flow cross-section which approximates to that of the connecting line (2), so that it is a portion thereof.

Abstract: A bypass system for a steam turbine wherein the temperature of the steam bypassed around the high pressure turbine is accurately controlled by measuring the inlet and outlet temperatures of the boiler reheater and generating an adaptive set point. The set point value is used to govern operation of a spray valve which admits cooling water to the bypass steam path.

Abstract: A power plant forced-flow boiler operative with water letdown wherein the letdown water is arranged to deliver heat to partly expanded steam passing through a steam reheater connected between two stages of a prime mover. The heating of steam in the reheater by letdown water will partly or wholly replace the use of live steam for such purpose so that the live steam will be available for driving the prime mover.

Abstract: A method and system for allocating fluid flow draining from a fluid utilizing apparatus to first and second fluid sinks. The fluid flow is entirely routed to the first fluid sink for drain flow rates less than a predetermined flow rate and to the second fluid sink as well as the first fluid sink for drain flow rates at least as great as the predetermined flow rate. Fluid from the fluid utilizing device is received in a drain tank through an inlet port and is drained therefrom through an outlet port. The fluid flow rate through the outlet port is regulated by cooperatively modulating first and second valves arranged in parallel flow relation to allocate fluid flow to the first and second fluid sinks.

Abstract: A desuperheater is disposed in a steam supply line supplying superheated steam to a shell and tube reheater.

Abstract: An automatic control system enabling comprehensive operation of a reheat steam turbine with sliding or constant pressure boilers. The control system includes an HP control valve for regulating steam flow to the high-pressure turbine according to load and speed demands, an intercept valve for regulating steam flow to the low-pressure turbine and for reheater pressure control, and a bypass flow system for bypassing excess boiler steam during periods of low loading. The bypass system includes a high-pressure bypass sub-system and a low-pressure bypass sub-system, each having a flow control valve and provision for desuperheating the steam. A signal indicative of actual load demand (ALD) and proportional to the product of boiler pressure and main control valve flow demand is produced. From the ALD signal, reference functions are generated to effect control of the bypass valves.

Abstract: The invention is directed to a method and apparatus for providing a single-cycle boiling moderator-coolant nuclear reactor which accommodates changes in demand with a turbine generator on direct governor control. Current single-cycle boiling moderator-coolant nuclear reactors employ turbine generators that are slaved to the reactor. This arrangement is dictated because of inherent response limitations of the single-cycle boiling moderator-coolant nuclear reactor. The system of the present invention diverts steam from steam consuming normal auxiliary plant equipment to maintain reactor pressure when a rapid increase in turbine power demand is made such as during a daily load following or a frequency regulation change in demand. This allows the turbine generator to be placed on direct governor control. Rapid positive or negative demands accepted by the turbine cause a decrease or an increase in the pressure of the reactor.

Abstract: An electronic system for operating a nuclear steam turbine power plant including a cycle steam reheater controller to control the heat transfer operation in a cycle steam reheater according to the steam and metal temperatures measured in one or more low pressure turbine sections, is disclosed. The steam and metal temperatures are closed-loop controlled as a function of the low pressure turbine design operational limitations. The reheater controller controls dual reheaters, each employing one or more heating sections which reheat cycle steam flowing therethrough to one or more low pressure turbine sections with split side entry steam inlet ports.

Abstract: A gaseous fluid is combined with a liquid to form a transient foam for processing the fluid as by compression, expansion, condensation, heat exchange or chemical reaction.

Abstract: The steam which is produced by the steam generator in the secondary coolant circuit of the nuclear reactor power plant is partly expanded in a turbine and delivered to a reheater. A part of the superheated steam is tapped off from an upstream portion of the steam turbine and then cooled to a saturated steam condition. This saturated steam is then passed into the reheater to reheat the flow of partly expanded steam via a heat exchange.

Abstract: A pressure-increasing ejector element is disposed in an extraction line intermediate to a high pressure turbine element and a feedwater heater. The ejector utilizes high pressure fluid from a reheater drain as the motive fluid to increase the pressure at which the extraction steam is introduced into the feedwater heater. The increase in pressure of the extraction steam entering the feedwater heater due to the steam passage through the ejector increases the heat exchange capability of the extraction steam thus increasing the overall steam power plant efficiency.

Abstract: A nuclear power plant includes a steam generator supplied via an input inlet with feed water heated by reactor coolant to generate steam, the steam being conducted to a steam engine having a high pressure stage to which the steam is supplied, and which exhausts the steam through a reheater to a low pressure stage. The reheater is a heat exchanger requiring a supply of hot fluid. To avoid the extra load that would be placed on the steam generator by using a portion of its steam output as such heating fluid, a portion of the water in the steam generator is removed and passed through the reheater, this water having received at least adequate heating in the steam generator to make the reheater effective, but not at the time of its removal being in a boiling condition.