Improving the performance of a 2-stage large aperture parabolic trough solar concentrator using a secondary reflector designed by adaptive method

Gong, Jing hu; Wang, Jun; Lund, Peter; Hu, En yi; Zhong, Xu; Liu, Guang peng; Li, Guo shuai

doi:10.1016/j.renene.2020.01.019

Cited by 47 publications

(43 citation statements)

References 30 publications

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“…Step 1: The radius of the semi-circular AT is determined by the help of the curve equation of the PR [1,14]:…”

Section: Physical Model 21 Geometric Modelmentioning

confidence: 99%

“…1) need to be adjusted to maximize the collection efficiency. The practical values of R and K were obtained with the ray-trace program SolTrace [14], which is able to analyze complex optical concentrator configurations [22,23]. A model of the PTC with the AT was built into SolTrace according to Steps 1-2.…”

Section: Physical Model 21 Geometric Modelmentioning

confidence: 99%

“…The above design method only considers the interception factor and manufacturing cost, but does not consider the cosine loss. A large PTC with SR designed by an adaptive algorithm [14] reached a 74.7% optical efficiency and a thermal efficiency of 70.1% with an input temperature of 400℃ in the condition of considering interception factors, manufacturing costs and cosine losses.…”

Section: Introductionmentioning

confidence: 99%

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Improving the performance of large-aperture parabolic trough solar concentrator using semi-circular absorber tube with external fin and flat-plate radiation shield

et al. 2020

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“…Step 1: The radius of the semi-circular AT is determined by the help of the curve equation of the PR [1,14]:…”

Section: Physical Model 21 Geometric Modelmentioning

confidence: 99%

Section: Physical Model 21 Geometric Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Improving the performance of large-aperture parabolic trough solar concentrator using semi-circular absorber tube with external fin and flat-plate radiation shield

et al. 2020

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“…As for the optical aspect, Gong et al (2020) proposed a secondary compound parabolic concentrator with enhanced surface flux uniformity, leading to a thermal efficiency improvement of 4.9%. Furthermore, Tang et al (2021) proposed a broken-line-type secondary concentrator design method based on the flux compensation concept.…”

Section: Introductionmentioning

confidence: 99%

Inverse Design of Local Solar Flux Distribution for a Solar Methanol Reforming Reactor Based on Shape Optimization

et al. 2022

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In this work, an inverse design method that couples the multi-physics model for a solar trough thermochemical reactor (SPTR) and shape optimization model is proposed to find out optimal solar flux distribution for maximizing overall reactor performance. The gradient-based segmentation method is applied to convert the continuous solar flux into step-like flux to guide the concentrator system design. Performance comparisons among uniform flux, linear decreasing flux, and the optimized non-linear flux are also conducted to discuss the reliability of SPTR performance improvement. The results show that the optimized non-linear solar flux can improve the methanol conversion, solar thermochemical conversion, and hydrogen yield of SPTR by 2.5, 3.3, and 2.4%, respectively, compared with the uniform flux. This is attributed to the fact that the optimized non-uniform flux distribution enhances the synergy between temperature and reaction fields, and achieves a better match between spatial solar flux supply and local energy demand by reactions. Also, it is shown that the optimized step-like flux, achieved by regressing the optimized non-linear flux, can perfectly maintain SPTR performance and is effective in boosting SPTR performance under different operating conditions.

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“…Nearly 21% of the optical performance has been enhanced through this secondary vertical booster [22]. An innovative design method for analyzing the performance of a large aperture two-stage SPTC has been developed and the result has shown that the optical efficiency of the basecollector was significantly increased by 5% by providing the secondary reflector [23]. The effect of gravity load and wind effect on the optical performance of the SPTC has been studied, and the significance of weight reduction on the tracking power consumption has also been studied for its better economic situations [24].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Optical Design and Performance of a Single-Axis-Tracking Solar Parabolic trough Collector with a Secondary Reflector

Subramaniyan¹,

Subramani²,

Kalidasan³

et al. 2021

Sustainability

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The design of solar concentrating collectors for the effective utilization of solar energy is a challenging condition due to tracking errors leading to different divergences of the solar incidence angle. To enhance the optical performance of solar parabolic trough collectors (SPTC) under a diverged solar incidence angle, an additional compound parabolic concentrator (CPC) is introduced as a secondary reflector. SPTC with CPC is designed and modeled for a single axis-tracking concentrating collector based on the local ambient conditions. In this work, the optical performance of the novel SPTC system with and without a secondary reflector is investigated using MATLAB and TRACEPRO software simulations for various tracking errors. The significance parameters such as the solar incidence angle, aperture length, receiver tube diameter, rim angle, concentration ratio, solar radiation, and absorbed flux are analyzed. The simulation results show that the rate of the absorbed flux on the receiver tube is significantly improved by providing the secondary reflector, which enhances the optical efficiency of the collector. It is found that the optical efficiency of the SPTC with a secondary reflector is 20% higher than the conventional collector system for a solar incidence angle of 2°. This work can effectively direct the choice of optimal secondary reflectors for SPTC under different design and operating conditions.

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Improving the performance of a 2-stage large aperture parabolic trough solar concentrator using a secondary reflector designed by adaptive method

Cited by 47 publications

References 30 publications

Improving the performance of large-aperture parabolic trough solar concentrator using semi-circular absorber tube with external fin and flat-plate radiation shield

Improving the performance of large-aperture parabolic trough solar concentrator using semi-circular absorber tube with external fin and flat-plate radiation shield

Inverse Design of Local Solar Flux Distribution for a Solar Methanol Reforming Reactor Based on Shape Optimization

Investigation on the Optical Design and Performance of a Single-Axis-Tracking Solar Parabolic trough Collector with a Secondary Reflector

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