An advanced solution to boost sun-to-electricity efficiency of parabolic dish

Giostri, Andrea; Macchi, Ennio

doi:10.1016/j.solener.2016.10.001

Cited by 29 publications

(11 citation statements)

References 45 publications

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“…This was motivated by the prototypal stage of high temperature solar receiver technologies. For a specific cost for the receiver similar to that assumed by us in Table 2, Giostri et al obtained an LCoE of about 180 e/MWhe for a 33 kWe solar dish located in Las Vegas, slightly above our results, but entirely comparable (see Figure 16 in [34]). In the last few years, a prototype parabolic dish with hybrid Brayton technology was developed with funding from the European Commission (2013-2017), the so-called OMSoP project [14].…”

Section: Levelized Cost Of Electricitysupporting

confidence: 81%

“…The final purpose of this section is to present a brief comparison of the LCoE results obtained within our model with other estimations for the same type of system and for other renewable systems for electricity production. As mentioned by Giostri et al [34], an LCoE equal to approximately 160 e/MWhe could guarantee competitiveness with reference CSP technologies, for instance parabolic trough or solar towers located in the Mojave desert, USA. In the study by Giostri et al, an evolution of the LCoE with receiver specific cost was presented.…”

Section: Levelized Cost Of Electricitymentioning

confidence: 96%

“…On-design direct normal irradiance was taken as G = 780 W/m 2 and ambient temperature as T L = 298.15 K. The data used to simulate the micro-gas turbine were adapted to reproduce the turbine Capstone C30 [33], the same analyzed by Semprini et al [31]. Generator and alternator efficiencies (η gen and η alt ) were set at 96% and the mechanical efficiency, η mec , at 98% [34]. For the case of 30 kWe, the deviation of our calculations for the thermal efficiency and the power output was below 3.5% and 0.4%, respectively.…”

Section: Numerical Data For Computations and Validationmentioning

confidence: 99%

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Thermodynamic and Cost Analysis of a Solar Dish Power Plant in Spain Hybridized with a Micro-Gas Turbine

et al. 2020

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Small-scale hybrid parabolic dish concentrated solar power systems are a promising option to obtain distributed electricity. During the day, solar energy is used to produce electricity, and the absence of sunlight can be overwhelmed with fuel combustion. This study presents a thermo-economic survey for a hybridized power plant in different regions of Spain, considering the local climatic conditions. The developed model considers the instant solar irradiance and ambient temperature dynamically, providing an estimation of the power output, the associated fuel consumption, and the most relevant pollutant emissions linked to combustion. Hybrid and combustion-only operating modes at selected geographical locations in Spain (with different latitudes, mean solar irradiances, and meteorological conditions) are analyzed. The levelized cost of electricity indicator is estimated as a function of investment, interest rate, maintenance, and fuel consumption actual costs in Spain. Values of about 124 €/MWhe are feasible. Fuel consumption and emissions in hybrid operation can be reduced above 30% with respect to those of the same turbine working in a pure combustion mode. This model shows the potential of hybrid solar dishes to become cost-competitive against non-renewable technologies from the point of view of costs and reduction in gas emission levels in regions with high solar radiation and low water resources.

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Section: Levelized Cost Of Electricitysupporting

confidence: 81%

Section: Levelized Cost Of Electricitymentioning

confidence: 96%

Section: Numerical Data For Computations and Validationmentioning

confidence: 99%

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Thermodynamic and Cost Analysis of a Solar Dish Power Plant in Spain Hybridized with a Micro-Gas Turbine

et al. 2020

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“…In most designs, combustor, and turbine of a high-temperature are placed in the center of the system in order to make the structure more compact and the receiver, the least heat loss. The system is surrounded by recuperator and cold air channel of a low-temperature [16][17][18][19]. The compressor compressed the air and was heated up by the recuperator.…”

Section: System Description and Methodologymentioning

confidence: 99%

Modelling of solar micro gas turbine for parabolic dish based controller application

et al. 2020

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Dish-Stirling unit and photovoltaic panels are the premier technologies available to generate off-grid solar energy. The major issue for both systems is in terms of producing output power. Air-Brayton cycle was utilized as an engine by converting the thermal energy to electricity. Micro gas turbine (MGT) has been recognized as one of the viable alternatives compared to Stirling engines, where it represents a state-of-art parabolic dish engine specifically in turbine gas technology. Hence, the micro gas turbine is a technology that is capable of controlling low carbon while providing electricity in off-grid regions. MGT uses any gas as its input like natural gas, biogas and others. Micro gas turbine has advantages for its high expansion ratio and less moving components. Compared to competing for diesel generators, the electricity costs from hybrid solar units were reduced between 10% and 43%, whereas specific CO2 emissions reduced by 20-35%. MGT provides advantages over photovoltaic systems such as the inherent ability to hybridize the systems with hydrocarbon fuels to produce electricity around the clock, and the ability to operate more effectively in very hot climates with photovoltaic performance degradation over the lifetime of the system. Hybrid solar micro gas-turbines are cost-effective, eco-friendly and pollution free as they can work by burning any gas like natural gas, landfill gas and others. This paper presented the controls contained in the MGT-dish system consisted of temperature control, fuel flow control, speed and acceleration control. A conceptual design of the 25kW MGT-dish system was also covered.

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“…Higher temperature outlet and thermal efficiency of solar receiver can directly affect the service life and efficiency of the entire solar power system [2,10]. Many researchers investigated various methods to improve the efﬁciency of the thermal receiver [11].…”

Section: Introductionmentioning

confidence: 99%