Combined Gas and Steam Cycle for a Gas-Cooled Solar Tower Power Plant

1982 ◽  
Vol 104 (2) ◽  
pp. 330-340 ◽  
Author(s):  
B. Becker ◽  
H. H. Finckh ◽  
R. Meyer-Pittroff
Keyword(s):  
Power Plant ◽  
Energy Conversion ◽  
Gas Turbine ◽  
Steam Generator ◽  
Solar Power ◽  
Waste Heat ◽  
Radiant Energy ◽  
Combined Cycle ◽  
Conversion System ◽  
Energy Conversion System

In gas-cooled solar power plants the radiant energy of the sun is transferred to the cycle fluid in a cavity type solar receiver and converted into electric energy by means of a combined gas and steam turbine cycle incorporating a waste heat steam generator. The design and optimization of the energy conversion system in accordance with solar-specific considerations are described with particular regard to the gas turbine. In designing the energy conversion system several variants on the combined cycle with waste heat steam generator are investigated and special measures for the improvement of the cycle efficiency, such as the refinement of the steam process through the addition of pressure stages are introduced. It is demonstrated that the solar power plant meets the requirements both for straight solar and constant load operation with fossil fuel substitution. In order to establish the possibilities of attaining high part-load efficiencies in straight solar operation, two modes, variable and constant speed of the gas turbine, are compared with one another.

scholarly journals Combined Gas and Steam Cycle for a Gas-Cooled Solar Tower Power Plant

1981 ◽  
Author(s):  
B. Becker ◽  
H. H. Finckh ◽  
R. Meyer-Pittroff
Keyword(s):  
Power Plant ◽  
Energy Conversion ◽  
Gas Turbine ◽  
Steam Generator ◽  
Solar Power ◽  
Waste Heat ◽  
Radiant Energy ◽  
Combined Cycle ◽  
Conversion System ◽  
Energy Conversion System

In gas-cooled solar power plants the radiant energy of the sun is transferred to the cycle fluid in a cavity type solar receiver and converted into electric energy by means of a combined gas and steam turbine cycle incorporating a waste heat steam generator. The design and optimization of the energy conversion system in accordance with solar-specific considerations are described with particular regard to the gas turbine. In designing the energy conversion system several variants on the combined cycle with waste heat steam generator are investigated and special measures for the improvement of the cycle efficiency, such as the refinement of the steam process through the addition of pressure stages are introduced. It is demonstrated that the solar power plant meets the requirements both for straight solar and constant load operation with fossil fuel substitution. In order to establish the possibilities of attaining high part-load efficiencies in straight solar operation, two modes, variable and constant speed of the gas turbine, are compared with one another.

scholarly journals In-grid solar-to-electrical energy conversion system modeling and testing

2012 ◽  
Vol 16 (suppl. 1) ◽  
pp. 159-171 ◽  
Author(s):  
Zoltan Corba ◽  
Vladimir Katic ◽  
Boris Dumnic ◽  
Dragan Milicevic
Keyword(s):  
Power Plant ◽  
Simulation Model ◽  
Energy Conversion ◽  
System Modeling ◽  
Electrical Energy ◽  
Photovoltaic Cell ◽  
Modeling Methods ◽  
Photovoltaic Power ◽  
Conversion System ◽  
Energy Conversion System

In this study, a simulation model of in-grid solar-to-electrical energy conversion system is presented. In this case, the in-grid solar-to-electrical energy conversion system is small photovoltaic power plant, which was constructed by the Center for Renewable Energy and Power Quality from Faculty of Technical Sciences (FTS). Equivalent circuit diagram of photovoltaic cell is described which was used to develop the simulation model of modules. Possible types and topologies of inverters are also described. The photovoltaic power plant is described briefly, because it is necessary to understand the simulation model. The result of simulation is an electricity annual production by the power plant. These results were compared with the real values, while its get a good overlap. The paper also presents the modern modeling methods developed at Faculty of Technical Sciences in the Laboratory for RES systems.

Analysis of Intermediate Temperature Combined Cycles With a Carbon Dioxide Topping Cycle

2008 ◽  
Author(s):  
R. Chacartegui ◽  
D. Sa´nchez ◽  
F. Jime´nez-Espadafor ◽  
A. Mun˜oz ◽  
T. Sa´nchez
Keyword(s):  
Carbon Dioxide ◽  
Power Plant ◽  
Gas Turbine ◽  
High Efficiency ◽  
Solar Power ◽  
Combined Cycle ◽  
Inlet Temperature ◽  
Pressure Drops ◽  
Combined Cycles ◽  
Topping Cycle

The development of high efficiency solar power plants based on gas turbine technology presents two problems, both of them directly associated with the solar power plant receiver design and the power plant size: lower turbine intake temperature and higher pressure drops in heat exchangers than in a conventional gas turbine. To partially solve these problems, different configurations of combined cycles composed of a closed cycle carbon dioxide gas turbine as topping cycle have been analyzed. The main advantage of the Brayton carbon dioxide cycle is its high net shaft work to expansion work ratio, in the range of 0.7–0.85 at supercritical compressor intake pressures, which is very close to that of the Rankine cycle. This feature will reduce the negative effects of pressure drops and will be also very interesting for cycles with moderate turbine inlet temperature (800–1000 K). Intercooling and reheat options are also considered. Furthermore, different working fluids have been analyzed for the bottoming cycle, seeking the best performance of the combined cycle in the ranges of temperatures considered.

Lignite-Fired Combined Cycle Power Plant With ACPFBC: Concept and Thermodynamic Calculations

2003 ◽  
Author(s):  
Hans Joachim Krautz ◽  
Rolf Chalupnik ◽  
Franz Stuhlmu¨ller
Keyword(s):  
Power Plant ◽  
Gas Turbine ◽  
Fluidized Bed ◽  
Waste Heat ◽  
Ambient Air ◽  
Basic Function ◽  
Combined Cycle ◽  
Thermodynamic Calculations ◽  
Test Plant ◽  
Coal Conversion

A 200 kWth test plant was constructed by BTU Cottbus for the purpose of developing a special variant of coal conversion based on 2nd generation PFBC. This concept, primarily to be used for generating power from lignite, employs a circulating type fluidized bed and is characterized by a design that combines the two air-blown steps “partial gasification” and “residual char combustion” in a single component. The subject of this paper is to develop an overall power plant concept based on this process, and to perform the associated thermodynamic calculations. In addition to the base concept with one large heavy-duty Siemens gas turbine V94.3A fired with Lausitz dried lignite (19% H2O), further versions with variation of Siemens gas turbine model (V94.3A and V64.3A), the water content of the fuel fired (raw lignite with more than 52% H2O or dried lignite) as well as the method of drying the coal were investigated. Common assumptions for all versions were ISO conditions for the ambient air and a condenser pressure of 0.05 bar. As expected, the calculations yielded very attractive net efficiencies of almost 50% (LHV based) for a variant with the small V64.3A gas turbine and up to more than 55% for the large plants with the V94.3A gas turbine. It was further demonstrated that thermodynamic integration of an advanced, innovative coal drying process (e.g. fluidized-bed drying with waste heat utilization) causes an additional gain in net efficiency of about three percentage points compared with the variant of firing lignite that was first dried externally. In addition to the basic function of the coal conversion system, it was necessary to also assume preconditions such as complete carbon conversion, reliable hot gas cleaning facilities and fuel gas properties that are acceptable for combustion in the gas turbine. Put abstract text here.

Design of the steam generator in an energy conversion system based on the aluminum combustion with water

2012 ◽  
Vol 97 ◽  
pp. 686-694 ◽  
Author(s):  
Stefano Mercati ◽  
Massimo Milani ◽  
Luca Montorsi ◽  
Fabrizio Paltrinieri
Keyword(s):  
Energy Conversion ◽  
Steam Generator ◽  
Aluminum Combustion ◽  
Conversion System ◽  
Energy Conversion System

scholarly journals Exergoeconomic optimization of a thermal power plant using particle swarm optimization

2013 ◽  
Vol 17 (2) ◽  
pp. 509-524 ◽  
Author(s):  
Axel Groniewsky
Keyword(s):  
Power Plant ◽  
Energy Conversion ◽  
Power Plants ◽  
Optimization Problems ◽  
State Of The Art ◽  
Search Algorithm ◽  
Thermal Power ◽  
Optimization Methods ◽  
Conversion System ◽  
Energy Conversion System

The basic concept in applying numerical optimization methods for power plants optimization problems is to combine a State of the art search algorithm with a powerful, power plant simulation program to optimize the energy conversion system from both economic and thermodynamic viewpoints. Improving the energy conversion system by optimizing the design and operation and studying interactions among plant components requires the investigation of a large number of possible design and operational alternatives. State of the art search algorithms can assist in the development of cost-effective power plant concepts. The aim of this paper is to present how nature-inspired swarm intelligence (especially PSO) can be applied in the field of power plant optimization and how to find solutions for the problems arising and also to apply exergoeconomic optimization technics for thermal power plants.

scholarly journals The Gas Turbine GT26 in Combined Cycle Application: Conversion of a Coal Power Plant Into a Modern Combined Cycle Firing Natural Gas and Oil No. 2

1996 ◽  
Author(s):  
Viktor Scherer ◽  
Dieter Scherer
Keyword(s):  
Power Plant ◽  
Natural Gas ◽  
Steam Turbine ◽  
Gas Turbine ◽  
Steam Generator ◽  
Power Output ◽  
Combined Cycle ◽  
Public Utility ◽  
Total Output ◽  
Hard Coal

The current paper describes the repowering of an existing coal plant (Rheinhafen Power Station). In this power plant, the hard coat boiler was repleced by a modern once through, Heat Recovery Steam Generator (HRSG). The HRSG is connected to a natural gas or oil fired gas turbine ABB GT26. The plant is located in Karlsruhe, Germany, and is operated by the Badenwerk AG, a public utility. The original hard coal fired plant was put into service in 1964. It is equipped with a steam turbine of approx. 100 MW power output. To maintain the initial steam data of the power plant at 160 bar and 540 °C, and to guarantee a low start-up time, an unfired once through type steam generator was chosen. Minor modifications were done in the steam turbine to increase the maximum steam turbine power output to approx. 124 MW. Combined with the approx. 240 MW power output of the GT26 a total output of 363.5 MW. MW is expected. The efficiency has thus been increased from 38 % for the steam power plant to 58.2% for the combined cycle.

Sign in / Sign up

Export Citation Format

Share Document