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Dr. Benjamin Grange
CNRS - French National Center for Scientific Research

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Research Keywords & Expertise

0 Concentrated Solar Power
0 Mechanics
0 Optics
0 Thermal Transfer
0 Simulation

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Short Biography

Benjamin Grange studied Process and Chemical Engineering (ENSIC, Nancy, France). He obtained his Ph.D. at the University of Perpignan via Domitia in 2012. After a 2-year postdoc in PROMES-CNRS, he became project leader in the Masdar Institute of the United Arab Emirates working on a new concept of a molten salt receiver. In January 2017, he rejoined PROMES-CNRS as research coordinator for the European Next-CSP project aiming at demonstrating the fluidized particle-in-tube solar receiver concept at pilot scale.

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Journal article
Published: 01 April 2021 in Sustainability
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An aiming point strategy applied to a prototype-scale power tower is analyzed in this paper to define the operation conditions and to preserve the lifetime of the solar receiver developed in the framework of the Next-commercial solar power (CSP) H2020 project. This innovative solar receiver involves the fluidized particle-in-tube concept. The aiming solution is compared to the case without the aiming strategy. Due to the complex tubular geometry of the receiver, results of the Tabu search for the aiming point strategy are combined with a ray-tracing software, and these results are then coupled with a simplified thermal model of the receiver to evaluate its performance. Daily and hourly aiming strategies are compared, and different objective normalized flux distributions are applied to quantify their influence on the receiver wall temperature distribution, thermal efficiency and particle outlet temperature. A gradual increase in the solar incident power on the receiver is analyzed in order to keep a uniform outlet particle temperature during the start-up. Results show that a tradeoff must be respected between wall temperature and particle outlet temperature.

ACS Style

Benjamin Grange; Gilles Flamant. Aiming Strategy on a Prototype-Scale Solar Receiver: Coupling of Tabu Search, Ray-Tracing and Thermal Models. Sustainability 2021, 13, 3920 .

AMA Style

Benjamin Grange, Gilles Flamant. Aiming Strategy on a Prototype-Scale Solar Receiver: Coupling of Tabu Search, Ray-Tracing and Thermal Models. Sustainability. 2021; 13 (7):3920.

Chicago/Turabian Style

Benjamin Grange; Gilles Flamant. 2021. "Aiming Strategy on a Prototype-Scale Solar Receiver: Coupling of Tabu Search, Ray-Tracing and Thermal Models." Sustainability 13, no. 7: 3920.

Journal article
Published: 14 September 2020 in Energies
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High temperature solar receivers are developed in the context of the Gen3 solar thermal power plants, in order to power high efficiency heat-to-electricity cycles. Since particle technology collects and stores high temperature solar heat, CNRS (French National Center for Scientific Research) develops an original technology using fluidized particles as HTF (heat transfer fluid). The targeted particle temperature is around 750 °C, and the walls of the receiver tubes, reach high working temperatures, which impose the design of a cavity receiver to limit the radiative losses. Therefore, the objective of this work is to explore the cavity shape effect on the absorber performances. Geometrical parameters are defined to parametrize the design. The size and shape of the cavity, the aperture-to-absorber distance and its tilt angle. A thermal model of a 50 MW hemi-cylindrical tubular receiver, closed by refractory panels, is developed, which accounts for radiation and convection losses. Parameter ranges that reach a thermal efficiency of at least 85% are explored. This sensitivity analysis allows the definition of cavity shape and dimensions to reach the targeted efficiency. For an aperture-to-absorber distance of 9 m, the 85% efficiency is obtained for aperture areas equal or less than 20 m2 and 25 m2 for high, and low convection losses, respectively.

ACS Style

Ronny Gueguen; Benjamin Grange; Françoise Bataille; Samuel Mer; Gilles Flamant. Shaping High Efficiency, High Temperature Cavity Tubular Solar Central Receivers. Energies 2020, 13, 4803 .

AMA Style

Ronny Gueguen, Benjamin Grange, Françoise Bataille, Samuel Mer, Gilles Flamant. Shaping High Efficiency, High Temperature Cavity Tubular Solar Central Receivers. Energies. 2020; 13 (18):4803.

Chicago/Turabian Style

Ronny Gueguen; Benjamin Grange; Françoise Bataille; Samuel Mer; Gilles Flamant. 2020. "Shaping High Efficiency, High Temperature Cavity Tubular Solar Central Receivers." Energies 13, no. 18: 4803.

Journal article
Published: 01 July 2016 in Applied Thermal Engineering
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ACS Style

B. Grange; C. Dalet; Q. Falcoz; A. Ferrière; G. Flamant. Impact of thermal energy storage integration on the performance of a hybrid solar gas-turbine power plant. Applied Thermal Engineering 2016, 105, 266 -275.

AMA Style

B. Grange, C. Dalet, Q. Falcoz, A. Ferrière, G. Flamant. Impact of thermal energy storage integration on the performance of a hybrid solar gas-turbine power plant. Applied Thermal Engineering. 2016; 105 ():266-275.

Chicago/Turabian Style

B. Grange; C. Dalet; Q. Falcoz; A. Ferrière; G. Flamant. 2016. "Impact of thermal energy storage integration on the performance of a hybrid solar gas-turbine power plant." Applied Thermal Engineering 105, no. : 266-275.

Journal article
Published: 19 July 2011 in Journal of Solar Energy Engineering
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In the framework of the French PEGASE project (Production of Electricity by GAs turbine and Solar Energy), CNRS/PROMES laboratory is developing a 4 MWth pressurized air solar receiver with a surface absorber based on a compact heat exchanger technology. The first step of this development consists in designing and testing a pilot scale (1/10 scale, e.g., 360 kWth) solar receiver based on a metallic surface absorber. This paper briefly presents the hydraulic and thermal performances of the innovative pressurized air solar absorber developed in a previous work. The goal is to be capable of preheating pressurized air from 350 °C at the inlet to 750 °C at the outlet, with a maximum pressure drop of 300 mbar. The receiver is a cavity of square aperture 120 cm × 120 cm and 1 m deepness with an average concentration in the aperture of more than 300. The square shaped aperture is chosen due to the small scale of the receiver; indeed, the performances are not enhanced that much with a round aperture, while the manufacturability is much more complicated. However in the perspective of PEGASE, a round aperture is likely to be used. The back of the cavity is covered by modules arranged in two series making the modular and multistage absorber. The thermal performances of one module are considered to simulate the thermal exchange within the receiver and to estimate the energy efficiency of this receiver. The results of the simulation show that the basic design yields an air outlet temperature of 739 °C under design operation conditions (1000 W/m2 solar irradiation, 0.8 kg/s air flow rate). Using the cavity walls as air preheating elements allows increasing the air outlet temperature above 750 °C as well as the energy efficiency up to 81% but at the cost of a critical absorber wall temperature. However, this wall temperature can be controlled by applying an aiming point strategy with the heliostat field.

ACS Style

B. Grange; A. Ferrière; D. Bellard; M. Vrinat; R. Couturier; Franck Pra; Yilin Fan. Thermal Performances of a High Temperature Air Solar Absorber Based on Compact Heat Exchange Technology. Journal of Solar Energy Engineering 2011, 133, 031004 .

AMA Style

B. Grange, A. Ferrière, D. Bellard, M. Vrinat, R. Couturier, Franck Pra, Yilin Fan. Thermal Performances of a High Temperature Air Solar Absorber Based on Compact Heat Exchange Technology. Journal of Solar Energy Engineering. 2011; 133 (3):031004.

Chicago/Turabian Style

B. Grange; A. Ferrière; D. Bellard; M. Vrinat; R. Couturier; Franck Pra; Yilin Fan. 2011. "Thermal Performances of a High Temperature Air Solar Absorber Based on Compact Heat Exchange Technology." Journal of Solar Energy Engineering 133, no. 3: 031004.