Showing papers on "Power station published in 1981"

Wind power electrical generator system

Abstract: A wind power electrical generator system having improved efficiency including a wind mill which activates an air compressor to generate a supply of pressurized air. An air motor activated by the supply of pressurized air drives a generator to produce electrical power. A waste air recovery mechanism, activated by the waste air from the air motor produces rotary energy assisting the wind mill in activating the air compressor.

Wind power generator and control therefore

Abstract: A wind powered generator for generating electrical energy comprising a generator which has no slip rings between its field and armature, and which when mounted on a tower is controlled through suitable control mechanism to adjust the power output to a level compatible with the load and storage equipment, as well as the existing wind conditions. The armature is fixedly mounted on the support (which can turn about an upright axis) and a housing carrying permanent magnets rotates around the armature. Bearing means stably support the housing and the armature and the propeller is easily mounted on the housing. The device is made to be relatively maintenance free and capable of unattended generation of electricity over extended periods of time.

Wind generator kite system

Abstract: This invention relates to a new system for generating electrical energy by wind power. The wind generator is suspended in the air like a kite by wind currents and is attached to the earth by a high strength cable to which are attached electric cables and a natural gas pipe. The numerous small wind generators are mounted in a box-like kite enclosure, which are raised to the desired elevation by rotary blade power with the assistance of a gas balloon. The wind generator kite is raised and lowered to the proper elevation for maximum electrical output. A complete system, including control methods, permits the production of electricity at a lower cost than conventional methods and provides means for generating large amounts of power with a high load factor.

Method of optimizing performance of rankine cycle power plants

Abstract: A method for efficiently operating a Rankine cycle power plant (10) to maximize fuel utilization efficiency or energy conversion efficiency or minimize costs by selecting a turbine (22) fluid inlet state which is substantially in the area adjacent and including the transposed critical temperature line (46) of the fluid.

Method and apparatus for reducing the initial start-up and subsequent stabilization period losses, for increasing the usable power and for improving the controllability of a thermal power plant

Abstract: In a method for reducing the start-up and stabilization period losses, for increasing the usable power and to improve the controllability of a thermal power plant, there are integrated into the power plant's steam cycle pressurized heat storage reservoirs which are charged by feeding them with excess heat produced in the said power plant as, for example, during the start-up and load stabilizing periods or during periods of reduced electrical power production and, when there is an increased demand for heat, the said heat storage reservoirs are discharged by the release of stored heat into the water-steam cycle. Control deviations in the electrical power while the power plant is in full operation are counterbalanced by changes in the charging and discharging streams of the pressurized heat storage reservoirs. In the apparatus for carrying out this method, pressurized heat storage reservoirs are connected, on the water-side, to the condensate system and, on the steam side, to the medium pressure of intermediate superheater network of the steam cycle or also to the power plant's medium pressure or low pressure turbine extraction points.

Wet cooling towers: rule-of-thumb design and simulation

Abstract: A survey of wet cooling tower literature was performed to develop a simplified method of cooling tower design and simulation for use in power plant cycle optimization. The theory of heat exchange in wet cooling towers is briefly summarized. The Merkel equation (the fundamental equation of heat transfer in wet cooling towers) is presented and discussed. The cooling tower fill constant (Ka) is defined and values derived. A rule-of-thumb method for the optimized design of cooling towers is presented. The rule-of-thumb design method provides information useful in power plant cycle optimization, including tower dimensions, water consumption rate, exit air temperature, power requirements and construction cost. In addition, a method for simulation of cooling tower performance at various operating conditions is presented. This information is also useful in power plant cycle evaluation. Using the information presented, it will be possible to incorporate wet cooling tower design and simulation into a procedure to evaluate and optimize power plant cycles.

Process for disposing of waste products inevitably formed downstream of coal-fired power stations and their utilisation with use of waste heat from the power station for production of preferably dam building materials for underground mining

Abstract: The invention relates to a process for disposing of waste products inevitably formed downstream of coal-fired power stations and their utilisation with use of waste heat from the power station for production of dam building materials or the like for underground mining. This object is achieved by the waste products, that is filter ash and flue gas desulphurisation gypsum, being mixed with the wet and/or dried calcium chloride from the flue gas scrubber, and being used, preferably with further supply of binders, hardeners and cement to form underground dam building materials and/or backfilling materials or roadway consolidation materials and preferably removing from the flue gases the heat necessary for drying the CaSO4 product and for concentrating the calcium chloride from the scrubbing water by evaporation.

Integrated coal-fired gas turbine power plant

Abstract: An integrated coal-fired gas turbine power plant includes a hydraulic compressor for providing pressurized air to a coal combustion system and cooling air to the gas turbine. The power plant may further include a regenerator between the compressor and the combustion system, and a gas cleanup segment between the combustion system and the gas turbine.

Some new conceptions in the approach to harnessing tidal energy

Abstract: This paper outlines a method of converting the energy of ocean tides into electrical and other forms of industrial energy. The main disadvantage of extracting tidal power arises from the low density of tidal power per unit area of the ocean. This leads to the high cost of required investment for the production of a substantial volume of the energy. 10 refs.

Evaluating feedstock requirements for a 50-megawatt wood-fired electric generating plant.

Abstract: The economic feasibility and feedstock requirements of a 50-MW commercial wood-fired electric-generating plant located in New England are assessed. Wood fuel stocks that would be utilized at such a plant would be solid or chipped roundwood and mill residues. Parameters considered include heat yield per unit wood weight; steam-boiler efficiency; moisture content; overall plant efficiency; and the comparative costs of wood, oil, and gas fuels. Results indicate that a 50-MW power plant would be expected to use about 273,000 tTpy of wood - 75% from whole tree chips and 25% from mill residues. At current energy prices, wood fuels are considered competitive with all other industrial fuels used in New England. The benefit of using wood for power is directly related to upgrading New England's forests by improving cutting practices. 18 references, 1 graph, 6 tables.

First field trials of a superconducting power cable within the power grid of a public utility

Abstract: The first tests of a superconducting power cable within the power grid of a public utility were conducted at the Steweag power plant in Arnstein, Austria, in 1979. The cable (conceived by Klaudy [1],[2] and manufactured by ATF and Kabelmetal) is 50 m long and consists of seven concentric, longitudinally welded corrugated tubes using the "Wellmantel" technology. The fully flexible cable was shipped on a reel by conventional rail and road transportation means. It was easily installed by technicians familiar with conventional cable laying methods. No problem developed during the evacuation and cooling by liquid helium to about 6.5 K. The shield was cooled by liquid nitrogen to about 77 K. The cable was designed for 110 kV and 1.6 kA. Although transmitting the entire available power output of the station, the full rating of the cable was not attained during the tests. The conductor for these first trials was made of copper-stabilized niobium. The tests were concluded without any problems and all components performed in accordance with their design expectations under actual field conditions.

Mobilization of Heavy Metals from Coal-Fired Power Plants: Potential Impact on Groundwater

Abstract: Heavy metal content in power plant coals was determined by neutron activation analysis. The obtained data were the basis of an assessment of the mobilization of heavy metals by coal-fired power plants situated in the territory of the- Member States of the European Communities. A dynamic compartmental model was applied to assess the migration of stack emitted Cd through soil to groundwater in the surroundings of a reference power plant. Results indicate a small time dependent increase (

An Assessment of Deposition in PFBC Power Plant Turbines

Abstract: Using turbine deposition models and data from PFBC pilot plant/cascade experiments, deposit buildup rates and turbine maintenance intervals to remove deposits are projected for a PFBC power plant system. The effects on turbine deposition of three alternative particle cleanup systems are evaluated. Turbine deposit removal intervals to prevent excessive power drops due to deposition are found for the alternative gas cleanup systems.

Solar pond power plant

Abstract: Method of operation and apparatus for a salt gradient solar pond employing a novel barge carrying a plurality of two axis stabilized high temperature concentrator solar cell arrays including means to control the flow rate of the concentrator solar cell array cooling fluid to optimize power station characteristics.

Wind power generating station with servo control of blades - uses measuring instrument of safety monitoring system producing pulses processed electronically

Abstract: A wind power generation station has a regulation and control circuit for adjusting the blades of the wind turbine. The blade settings for the various wind characteristics and changes are effected rapidly and securely with the min. of mechanical operations. The measuring instruments used for the adjustment are part of the safety monitoring devices linked to the blades. The measuring pulses are processed in an electronic control unit to produce adjustment pulses. These pulses act as a supplement to the measuring system. They operate a hydraulic control unit with limiters for the throughput. Another unit supplies the control fluid in a circuit with a header vessel and a pressure store.

Procedures for the Exchange of Power Plant and Load Data for Synchronous Stability Studies

Abstract: This paper provides a specification for the exchange of power plant and load data in five categories: generator data, excitation system data, power system stabilizer data, speed-governing system data, and composite load data.

Method for desulfurization with a fluidized bed in a power plant burning pulverized coal, and power plant working according to this method

Abstract: To avoid the disadvantages which are linked with desulphurisation of the exhaust gases in the fluidised bed of the boiler furnace, a fluidised bed chamber (9) is provided downstream of the boiler (1) in which the exhaust gases are desulphurised at the most favourable reaction temperature between 800 and 900 DEG C.

Solar pond power plant and method of operating the same as a part of an electrical generating system

Abstract: A solar pond power plant has a solar pond with a heat storage layer for storing heat absorbed from solar radiation incident on the pond, and a low-temperature, closed Rankine-cycle turbogenerator operating on heat extracted from the heat storage layer. The turbogenerator has a generating capacity of QI watts/m2 of pond area, this capacity being in excess of Qe watts/m2 of pond area where Qe is the net electrical energy that can be generated by the turbogenerator when heat is extracted from the heat storage layer at substantially the same average rate at which heat is absorbed by the layer. According to the invention, the generating capacity QI of the turbogenerator is in the range 2-10 times Qe, whereby the solar pond power plant can be utilized for peak power requirements of a regional electrical generating system.