Micromix Combustor for High Temperature Hybrid Gas Turbine Concentrated Solar Power Systems

Coogan, Shane B.; Brun, Klaus; Teraji, David

doi:10.1016/j.egypro.2014.03.139

Cited by 9 publications

(4 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent years, micromixer has been developing rapidly and widely used in many disciplines, e.g., biology, − chemistry, − energy industry, , and medicine, − for chemical detection and analysis. Conventionally, the dimensions of the micromixer are below the submillimeter, and the characteristic velocity of the fluid is on the orders of millimeters per second or smaller.…”

mentioning

confidence: 99%

Mixing and Flow Transition in an Optimized Electrokinetic Turbulent Micromixer

et al. 2022

View full text Add to dashboard Cite

Micromixer is a key element in a lab on a chip for broad applications in the analysis and measurement of chemistry and engineering. Previous investigations reported that electrokinetic (EK) turbulence could be realized in a "Y" type micromixer with a cross-sectional dimension of 100 μm order. Although the ultrafast turbulent mixing can be generated at a bulk flow Reynolds number on the order of unity, the micromixer has not been optimized. In this investigation, we systematically investigated the influence of electric field intensity, AC frequency, electric conductivity ratio, and channel width at the entrance on the mixing effect and transition electric Rayleigh number in the "Y" type electrokinetic turbulent micromixer. It is found that the optimal mixing is realized in a 350 μm wide micromixer, under 100 kHz and 1.14 × 10 5 V/m AC electric field, with an electric conductivity ratio of 1:3000. Under these conditions, a degree of mixedness of 0.93 can be achieved at 84 μm from the entrance and 100 ms. A further investigation of the critical electric field and the critical electric Rayleigh number indicates that the most unstable condition of EK flow instability is inconsistent with that of the optimal mixing in EK turbulence. To predict the evolution of EK flow under high Ra σ and guide the design of EK turbulent micromixers, it is necessary to apply a computational turbulence model instead of linear instability analysis.

show abstract

mentioning

confidence: 99%

Mixing and Flow Transition in an Optimized Electrokinetic Turbulent Micromixer

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Although the focus of the research was on the design of the receivers themselves, the system was also analyzed and predicted an overall efficiency of nearly 30% [63]. In addition to the receiver design, the combustor design in solar-heated gas turbines is also important, as conventional combustors have not been designed to accept high temperature inlet conditions [64] and rigorous modeling of the combustor via computational fluid dynamics (CFD) or other methods can be beneficial [65,66]. In a similar work, a pressurized, dish-based solar receiver with a micro gas turbine studied by Ragnolo et al predicted an overall efficiency of 29.6% [67].…”

Section: Solar-aided Gas Turbinesmentioning

confidence: 99%

Hybrid concentrated solar thermal power systems: A review

Powell

Rashid

Ellingwood

et al. 2017

Renewable and Sustainable Energy Reviews

192

View full text Add to dashboard Cite

Concentrated solar power (CSP), or solar thermal power, is an ideal technology to hybridize with other energy technologies for power generation. CSP shares technology with conventional power generation and can be readily integrated with other energy types into a synergistic system, which has many potential benefits including increased dispatchability and reliability, improved efficiency, reduced capital costs through equipment sharing, and the opportunity for flexible operation by alternating between energy sources, which can lead to improved overall efficiency through synergy of the different energy sources. Another advantage of CSP technology is the ability to readily store via thermal energy storage (TES), making the intermittent solar resource dispatchable. A review of CSP hybridization strategies with coal, natural gas, biofuels, geothermal, photovoltaic (PV), and wind is given. An overview of different configurations for hybridizing CSP with these other energy sources is also provided. Hybridized CSP plants present different types and levels of synergy, depending on the hybrid energy source, the location of the plant, the CSP technology used, and the plant configuration. Coal, natural gas, and biofuel hybrids with CSP present many opportunities to inject solar heat at various temperatures. These combustible fuels provide reliability, dispatchability, and flexibility but are not entirely renewable solutions (with the exception of biofuels). Geothermal, wind, and PV hybrid designs with CSP can be entirely renewable, but lack some of the benefits of hydrocarbon fuels. Effective geothermal-CSP hybrid designs require low temperature operation where efficiency is limited by the power cycle. Wind-CSP and PVT (photovoltaic/thermal) lack dispatchability, but have other advantages. The pursuit of ideal CSP hybrid systems is an important research topic as it allows for further development of CSP technologies while providing an immediate solution that increases the use of solar power.

show abstract

“…Erdem and Sevilgen [10] revealed that the monthly reduction in power which is 1.7 to 7.2 %, triggered by the ambient temperature. Because of the high ambient temperatures, decrease in electricity generation is noticed and this causes the increase in fuel consumption [11]. The power generated is raised from about 0.40 to 7.5% in the result of decreased surrounding temperature up to 10 o C [10].…”

Section: Introductionmentioning

confidence: 98%

Optimum Performance Enhancing Strategies of the Gas Turbine Based on the Effective Temperatures

Ibrahim

Rahman

Ali

et al. 2016

MATEC Web of Conferences

View full text Add to dashboard Cite

Gas turbines (GT) have come to play a significant role in distributed energy systems due to its multi-fuel capability, compact size and low environmental impact and reduced cost. Nevertheless, the low electrical efficiency, typically about 30% (LHV), is an important obstruction to the development of the GT plants. New strategies are designed for the GT plant, to increase the overall performance based on the operational modeling and optimization of GT power plants. The enhancing strategies effect on the GT power plant's performance (with intercooler, twoshaft, reheat and regenerative) based on the real power plant of GT. An analysis based on thermodynamics has been carried out on the modifications of the cycle configurations' enhancements. Then, the results showed the effect of the ambient and turbine inlet temperatures on the performance of the GT plants to select an optimum strategy for the GT. The performance model code to compare the strategies of the GT plants were developed utilizing the MATLAB software. The results show that, the best thermal efficiency occurs in the intercooler-regenerative-reheated GT strategy (IRHGT); it decreased from 51.5 to 48%, when the ambient temperature increased (from 273 to 327K). Furthermore, the thermal efficiency of the GT for the strategies without the regenerative increased (about 3.3%), while thermal efficiency for the strategies with regenerative increased (about 22%) with increased of the turbine inlet temperature. The lower thermal efficiency occurs in the IHGT strategy, while the higher thermal efficiency occurs in the IRHGT strategy. However, the power output variation is more significant at a higher value of the turbine inlet temperature. The simulation model gives a consistent result compared with Baiji GT plant. The extensive modeling performed in this study reveals that; the ambient temperature and turbine inlet temperature are strongly influenced on the performance of GT plant.

show abstract

Micromix Combustor for High Temperature Hybrid Gas Turbine Concentrated Solar Power Systems

Cited by 9 publications

References 3 publications

Mixing and Flow Transition in an Optimized Electrokinetic Turbulent Micromixer

Mixing and Flow Transition in an Optimized Electrokinetic Turbulent Micromixer

Hybrid concentrated solar thermal power systems: A review

Optimum Performance Enhancing Strategies of the Gas Turbine Based on the Effective Temperatures

Contact Info

Product

Resources

About