Numerical simulation of a trapezoidal cavity receiver for a linear Fresnel solar collector concentrator

Facão, Jorge; Oliveira, Armando C.

doi:10.1016/j.renene.2010.06.003

Cited by 113 publications

(41 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The heat loss coefficient shows a downtrend with the increase of inclination of side walls; the influence of cavity depth is negligible, which is consistent with the conclusion of Facão and Oliveira [18]. Among all the cavity models that are simulated in this work, the trapezoidal cavity with 100 mm cavity depth and 20 mm insulation thickness plays the best thermal performance.…”

Section: Discussionsupporting

confidence: 88%

Thermal Performance Prediction of a Trapezoidal Cavity Absorber for a Linear Fresnel Reflector

Lai

Che

et al. 2013

Advances in Mechanical Engineering

View full text Add to dashboard Cite

A trapezoidal cavity absorber for a linear Fresnel reflector concentrator is analyzed and optimized via CFD simulation. The heat loss coefficient is introduced; the influences of ambient temperature, absorber temperature, cavity depth, inclination of side walls, insulation thickness, glass window, and emissivity of selective absorption coating have been studied. The results show that radiation dominates the cavity heat loss, and heat loss through the glass window is higher than through the insulation layer; among these factors, impact of emissivity of selective absorption coating and insulation layer is greater than that of the other factors. The simulation results via CFD prove that cavity with a 100 mm depth shows the best thermal performance among the parameters that have been taken into account.

show abstract

Section: Discussionsupporting

confidence: 88%

Thermal Performance Prediction of a Trapezoidal Cavity Absorber for a Linear Fresnel Reflector

Lai

Che

et al. 2013

Advances in Mechanical Engineering

View full text Add to dashboard Cite

show abstract

“…Heat loss comparison of these two cases proved that a 2D simulation with a constant temperature assumption can accurately model the heat loss from a cavity. This assumption has been widely used by previous researchers without checking its validity [7][8][9][10].…”

Section: Cfd Modelingmentioning

confidence: 99%

“…Moreover, previous researchers mostly used the Boussinesq approximation to simulate natural convective flow inside the cavity enclosure [7][8][9] without verifying this assumption. This approximation is accurate when the actual change in density is small:…”

Section: Cfd Modelingmentioning

confidence: 99%

Optimization of insulation of a linear Fresnel collector

Moghimi

Craig²,

Meyer³

2017

AIP Conference Proceedings

View full text Add to dashboard Cite

Abstract. This study presents a simulation based optimization study of insulation around the cavity receiver of a Linear Fresnel Collector. This optimization study focuses on minimizing heat losses from a cavity receiver (maximizing plant thermal efficiency), while minimizing insulation cross-sectional area (minimizing material cost and cavity dead load), which leads to a cheaper and thermally more efficient LFC cavity receiver.

show abstract

“…In a study by Abbas et al about multi-tube receivers, the highest thermal efficiency was obtained at 58% [4]. If Multi-tube receivers are not vacuumed, convection heat lost become high due to radiation is not completely absorbed in the tubes and it is reflected in cavity [5]. Non-vacuum tubes have the most thermal losses.…”

Section: Introductionmentioning

confidence: 99%

Solar Concentrated Energy Supply to Water-Ammonia Absorption Refrigerators

Goortani¹,

Alghorayshi²

2017

Proceedings of the 4th International Conference of Fluid Flow, Heat and Mass Transfer (FFHMT'17)

View full text Add to dashboard Cite

-A gPROMS model for concentrated solar absorption chillers is developed. The advantages of a thermal heat storage system in terms of absorbing drastic solar energy change and storing the energy for working overnight and working during cloudy hours are assumed and calculated in a quantitative manner. The project is an ongoing project supported by Iran Office of Vice-presidency for Science and Technology and has broader objective of practical use of large scale linear Fresnel collectors for cooling applications. Consequently, some preliminary studies were performed. A novel dual axis Fresnel collector with overall dimensions of 12.70 cm by 2.30 cm and total mirrors area of 16.5 m 2 is designed and fabricated. A model of receiver, a vacuum tube metal-glass of 20 cm diameter, is first designed and fabricated and tested. CFD modeling with Fluent was utilized to predict velocity and temperature profiles in non-continuous operation mode of the receiver. The profiles of velocity and temperature at receiver angles of 10, 20, 40 and 50 degrees corresponding to the sun elevation angle variations during the year are determined. At the receiver angle of 10 degrees (corresponding to mid-summer), a maximum velocity of 4 cm/s was obtained at the center. The location of this maximum velocity changes toward the wall by increasing the receiver angle.

show abstract

Numerical simulation of a trapezoidal cavity receiver for a linear Fresnel solar collector concentrator

Cited by 113 publications

References 5 publications

Thermal Performance Prediction of a Trapezoidal Cavity Absorber for a Linear Fresnel Reflector

Thermal Performance Prediction of a Trapezoidal Cavity Absorber for a Linear Fresnel Reflector

Optimization of insulation of a linear Fresnel collector

Solar Concentrated Energy Supply to Water-Ammonia Absorption Refrigerators

Contact Info

Product

Resources

About