Efficiency determination of tubular solar receivers in central receiver systems

Ebert, Miriam; Benitez, Daniel; Röger, Marc; Korzynietz, Roman; Brioso, J.

doi:10.1016/j.solener.2016.08.047

Cited by 23 publications

(7 citation statements)

References 6 publications

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“…T rec , Q air and T x are determined using either Model 1 or 2, together with an ε NTU method for the air inside tubes. Values of T x predicted by both models are plotted against experimental data [8] in Figure 3, where it can be observed that model 2 provides a more accurate description while model 1 tends to overestimate T x .…”

Section: Modelmentioning

confidence: 99%

“…Where is the heat gained by the air in the receiver, the fraction of the incident radiation that reaches the receiver, G the direct normal irradiance, the aperture area of the collector, the absorber area of the receivers, ɛ the effective emissivity, σ the Stefan-Boltzmann constant, the ambient temperature (K), the temperature of the surface of the receiver and the convective losses of the solar receiver. was estimated using experimental data [8] shown in Table 1. The effective emissivity of the receiver ɛ was calculated by considering an emissivity value of 0.9 [9] for the tubes in a cylindrical cavity and affecting it by the view factor between the tubes and cavity apertures, as proposed in [10].…”

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confidence: 99%

“…Receiver outlet temperature (T x ) predictions against experimental data[8] at different operating points.…”

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confidence: 99%

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Thermodynamic simulation of a hybrid thermo-solar externally fired gas turbine power plant fueled with biomass

Ghazarian

León

Galione

et al. 2018

AIP Conference Proceedings

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A thermodynamic model for a hybrid thermo-solar externally fired gas turbine power plant fueled with biomass is presented. This technology represents a fully renewable way of obtaining electric power relying mainly in biomass with an extra advantage of decreasing its consumption at good radiative conditions. A concentrated solar power plant is implemented considering the Solugas project situated in Abengoa's Solúcar Platform near Seville. To predict its behavior two models were implemented and compared with experimental data. Typical daily evolution of the output power, biomass mass flow, overall efficiency and biomass conversion efficiency for a typical Uruguayan year is presented. In addition, global results are presented leading to a 1.5% biomass saving increasing the economic efficiency a 0.34% what denotes the solar field and thermal power of receiver seem to be undersized.

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Section: Modelmentioning

confidence: 99%

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confidence: 99%

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Thermodynamic simulation of a hybrid thermo-solar externally fired gas turbine power plant fueled with biomass

Ghazarian

León

Galione

et al. 2018

AIP Conference Proceedings

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“…A recent compilation and comparison among those models is due to Jafrancesco et al [13]. Solar receivers technology, specially at the high temperatures required by Brayton cycles, is an open research field, both from the experimental viewpoint [14,15] or from computational fluid dynamics or materials perspectives [16]. There are also different tools to predict the performance of the power units producing the electricity from the thermosolar input as TRNSYS [17], Thermoflex [18], EBSILON Professional [19], EES [20], etc., that have been used by many authors.…”

Section: Introductionmentioning

confidence: 99%

Thermo-economic and sensitivity analysis of a central tower hybrid Brayton solar power plant

Merchán

Sánchez

García-Ferrero

et al. 2021

Applied Thermal Engineering

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A hybrid central tower thermo-solar plant working with a gas turbine is simulated by means of an in-house developed model and software. The model considers the integration of all plant subsystems. The calculation of the heliostat solar field efficiency includes the main losses factors as blocking, shadowing, attenuation, interception, and cosine effect. The simulation considers a Brayton cycle for the power unit with irreversibilities in the compressor and turbine, and pressure drops in the heat absorption and extraction processes. A combustion chamber burning natural gas ensures an approximately constant power output. The model is flexible and precise. At the same time it is fast enough to perform sensitivity studies on the efficiency of any subsystem and the overall plant. Thus, it allows for performing a thermo-economic analysis of the plant checking the influence of the main plant design parameters. The focal objective is to analyze the importance on the levelized cost of electricity (LCoE) of the key plant design parameters. The direct influence of parameters from the heliostat field and receiver (as tower height, distance to the first row of heliostats, heliostats size, receiver size and heat losses, etc.) on final LCoE is surveyed. Similarly, parameters from the turbine as pressure ratio, turbine inlet temperature, influence of recuperation and others, are also analyzed. The dimensions of the plant are taken from SOLUGAS prototype near Seville, Spain, although another location with quite different solar conditions in Spain is also considered. LCoE values predicted are about 158 USD/MWh. The analysis concludes that among several parameters surveyed, two of them are key in LCoE predicted values: turbine inlet temperature and solar receiver aperture size.

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“…However, validation of these methods is required through either direct or indirect systems regularly. In 2016 Ebert et al [11] presented a new measurement-supported simulation approach for the estimation of the solar input power. The uncertainty of the solar input was estimated to be from -1.3% to +6.3% which contributed to the overall uncertainty in the SOLUGAS receiver to be between -2.8% and +7.7%.…”

Section: Introductionmentioning

confidence: 99%

Heat Flux Distribution Estimation for CSP Applications

Stokos

Votyakov

Papanicolas

2021

Preprint

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In this paper the concept of a new method for the estimation of the heat flux distribution and the total power in CSP applications is presented. This method requires appropriate analysis of the temperature evolution on a target, or directly on a receiver. A 3-D thermal conduction model with boundary conditions to take into account the convection and radiation losses has been developed. A parametric analysis was performed and we checked how the physical parameters affect the applicability of the method. Having proven numerically the potential of this method, it was experimentally implemented in the central tower CSP plant of The Cyprus Institute at PROTEAS facilities successfully. The experience gained from the numerical and experimental application of this method is discussed.

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Efficiency determination of tubular solar receivers in central receiver systems

Cited by 23 publications

References 6 publications

Thermodynamic simulation of a hybrid thermo-solar externally fired gas turbine power plant fueled with biomass

Thermodynamic simulation of a hybrid thermo-solar externally fired gas turbine power plant fueled with biomass

Thermo-economic and sensitivity analysis of a central tower hybrid Brayton solar power plant

Heat Flux Distribution Estimation for CSP Applications

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