Parameterization of High Solar Share Gas Turbine Systems

Heide, Stephan; Felsmann, Christian; Gampe, Uwe; Boje, Sven; Gericke, B.; Freimark, Manfred; Langnickel, Ulrich; Buck, Reiner; Giuliano, Stefano

doi:10.1115/gt2012-68608

Cited by 8 publications

(5 citation statements)

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“…Parameterization studies have been conducted earlier in the research project to identify optimal design parameters under the given boundary conditions [7]. In this study the analysis was made for three pre-defined combinations of TES capacity and solar field size for each SHGT variant.…”

Section: System Description and Methodologymentioning

confidence: 99%

Hybrid High Solar Share Gas Turbine Systems with Innovative Gas Turbine Cycles

et al. 2015

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In this paper results from an ongoing research project (HYGATE) are presented, which is performed to reduce the levelized cost of electricity (LCOE) and to increase the CO 2 reduction potential of the solar-hybrid gas turbine plant concept (SHGT). Key improvements are the integration of thermal energy storage and the reduction of the operating temperature of the gas turbine to 950°C. As a result the solar receiver can provide the necessary temperature for solar-only operation of the plant at design pointwithout using the auxiliary burner. Annual performance calculations and an economic analysis of four different plant concepts were performed. Those concepts were analyzed using innovative power block processes. In general, such systems offer reliable and dispatchable power with low specific CO 2 emissions. A substantial decrease of CO 2 emissions has been achieved all along the four variants compared to results of a previous project [1]. Compared to the defined reference molten salt solar tower the solar-hybrid gas turbine plants as of now yield higher plant efficiencies, but have a slightly lower potential for CO 2 reduction. Among the SHGT plants the variants including a bottoming Organic Rankine Cycle (SHORCC and SHORCC-R) achieve the highest efficiencies but have significantly higher LCOE, caused by the high costs of the ORC components which are not yet commercially available in the required dimensions. The solar-hybrid combined cycle plant (SHCC) and solar-hybrid gas turbine plant with quasi isothermal compression and recuperation (SHGT-ICR) perform best among the SHGT plants in terms of LCOE, and can be considered an interesting alternative to molten salt tower plants. Taking into account other factors, such as plant complexity and water consumption, an isothermal solar gas turbine plant shows the most potential advantages. However, the SHCC has the highest technological maturity and is a likely candidate for a future demonstration plant.

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Section: System Description and Methodologymentioning

confidence: 99%

Hybrid High Solar Share Gas Turbine Systems with Innovative Gas Turbine Cycles

et al. 2015

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“…(8) is used for calculation of the nonisentropic outlet enthalpy flow hf,out ~ hj \n T /'.is((ty .in /'r.o u t.is)…”

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confidence: 99%

Modeling and Simulation of the Dynamic Operating Behavior of a High Solar Share Gas Turbine System

Felsmann

Gampe

Heide

et al. 2014

Journal of Engineering for Gas Turbines and Power

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Solar gas turbine (GT) systems provide the opportunity to utilize solar heat at a much higher temperature than solar thermal power plants based on steam turbine cycles. Therefore, GT technology has the potential to improve the efficiency o f future solar ther mal power plants. Nevertheless, to achieve mature technology fo r commercial applica tion, further development steps are required. Knowledge o f the operational behavior o f the solar GT system is the basis fo r the development o f the systems control architecture and safety concept. The paper addresses dynamic simulation o f high solar share GT sys tems, which are characterized by primary input o f solar heat to the GT. To analyze the dynamic operating behavior, a model with parallel arrangement o f the combustion cham ber and the solar receiver was set up. By using the heaviside step function, the system dy namics were translated into transfer functions which are used to develop controllers fo r the particular system configuration. Two operating conditions were simulated to test the controller performance. The first case is the slow increase and decrease o f solar heat flow, as part o f a regular operation. The second case is an assumed rapid change o f solar heat flow, which can be caused by clouds. For all cases, time plots o f critical system pa rameters are shown and analyzed. The simulation results show much more complex sys tem behavior compared to conventional GT systems. This is due to the additional solar heat source, large volumes, and stored thermal energy as well as the time delay o f energy transportation caused by the piping system.

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“…In this cycle, Helium is heated up to 900°C in the solar receiver. Heide et al (2012) investigated various forms of solar gas turbine cycle and showed a combination of the gas turbine cycle with an organic Rankine cycle (ORC) as a combined cycle efficiency enhancer (Mahlia et al, 2019). In an ORC, an organic fluid with a high molecular mass and a boiling point that is much lower than the water phase can change temperature.…”

Section: Introductionmentioning

confidence: 99%

Modeling the efficiency and emissions of a hybrid solar-gas power plant

Khorampoor

Farahani

Mosavi

2020

Engineering Applications of Computational Fluid Mechanics

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In this paper, modeling and analysis of a hybrid solar power plant are presented. Within a theoretical framework, thermodynamic modeling of several components of the cycles has been conducted through simultaneous consideration of energy, exergy, and emissions. The energy and exergy of the combined cycle of the solar-gas turbine and organic Rankine cycle (ORC) have been investigated. Heat loss from the solar receiver has been studied considering essential factors such as wind speed, air pressure, and ambient temperature. The emissions, mass flow rate of working fluids, pressure ratio, and concentration ratio are evaluated and compared with a standard fossil-fueled power plant. The results show that the energy efficiency and exergy of the overall system are substantially improved as the solar radiation intensity increases. Furthermore, the output power of the ORC is reported to be higher than that of the Rankin steam cycle. Consequently, when solar energy is used, the carbon dioxide emission is reduced by 150%.

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Parameterization of High Solar Share Gas Turbine Systems

Cited by 8 publications

References 0 publications

Hybrid High Solar Share Gas Turbine Systems with Innovative Gas Turbine Cycles

Hybrid High Solar Share Gas Turbine Systems with Innovative Gas Turbine Cycles

Modeling and Simulation of the Dynamic Operating Behavior of a High Solar Share Gas Turbine System

Modeling the efficiency and emissions of a hybrid solar-gas power plant

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