Optical, geometric and thermal study for solar parabolic concentrator efficiency improvement under Tunisia environment: A case study

Skouri, Safa; Salah, M. Ben; Bouadila, Salwa; Balghouthi, Moncef; Nasrallah, Sassi Ben

doi:10.1016/j.enconman.2013.06.022

Cited by 25 publications

(3 citation statements)

References 24 publications

(23 reference statements)

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“…Using space frames from different suppliers, the average root mean square (rms) slope errors obtained in their study ranged from as high as 4.46 mrad to about 3.0 mrad. Other studies that have considered investigations of optical performance in the analysis of parabolic trough systems include (Skouri et al, 2013, Balghouthi et al, 2014, Xu et al, 2014. In these studies, the presence of optical errors is evident.…”

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confidence: 99%

Influence of optical errors on the thermal and thermodynamic performance of a solar parabolic trough receiver

et al. 2016

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HIGHLIGHTS• Effect of optical errors on performance of a parabolic trough receiver is presented.• Actual heat flux profiles were obtained using Monte Carlo ray tracing and presented.• Thermal and thermodynamic analysis of the receiver is determined numerically.• Effect of optical errors on heat flux and temperature distribution is investigated.• Influence of optical errors on receiver entropy generation rates is presented. ABSTRACTThis paper presents results of an investigation covering the influence of optical errors on the thermal and thermodynamic performance of a solar parabolic trough system. The optical performance was evaluated by using Monte Carlo ray tracing for slope errors and specularity For the range of parameters considered, the intercept factor reduces by up to 21% while the overall thermal efficiency reduces by up to 17% as optical errors increase. Receiver thermodynamic performance is shown to deteriorate as slope errors increase.

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confidence: 99%

Influence of optical errors on the thermal and thermodynamic performance of a solar parabolic trough receiver

et al. 2016

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“…Thomas and Guven [19] proposed an analytical method to determine the effect of the receiver position error on circumferential distribution of heat flux on the outer surface of the absorber tube. A series of experimental and analytical studies have been carried out to study the effect of optical and geometrical errors on the optical performance of the PTC system [16,[20][21][22][23][24][25][26][27]. The receiver position error occurs due to (i) weight of the receiver assembly and weight of HTF causing sagging of the receiver assembly (ii) variation in specified shape of the receiver after welding and galvanization (iii) misalignment in the receiver support structure assembly and (iv) distortion of the collector supporting frame due to gravitational loading [17].…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Parabolic Trough Collector With Receiver Position Error

Donga

Kumar

2021

Journal of Thermal Engineering

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In the present study, the effect of receiver position error on the optical and thermal performance of a parabolic trough collector (PTC) has been studied. Optical analysis of the PTC has been carried out by using Monte Carlo ray tracing (MCRT) method. The solar heat flux profile obtained from the optical analysis is coupled with the finite volume method (FVM) to study the thermal performance of the PTC. Simulations have been done for experimental SEGS LS2 solar collector used in Sandia National Laboratories. Syltherm 800 has been considered as heat transfer fluid (HTF). Receiver position errors in two directions i.e. along optical axis and lateral direction, have been taken. Results show that the receiver position error substantially influences the solar heat flux distribution and hence the temperature distribution on the absorber tube. The maximum circumferential temperature difference over the absorber tube increases up to by 199.7 K with receiver dislocation along the optical axis. The effects of the receiver position error on the optical efficiency and collector efficiency have also been studied. A maximum drop of 32% in the optical efficiency is observed when the receiver is displaced from the focus by 1.63% of focal length of the collector in both directions. The collector efficiency decreases by up to 14% when the receiver is offset by 1.63% of focal length of the collector along optical axis (away from the trough).

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“…However, the high efficiency and low cost is the key for large-scale application of CSP plant [27,28]. Besides, some researches focus on the solar radiation model and algorithm of the model for solar irradiation [29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Calculation of aerosol optical depth in solar radiation for different meteorological conditions

Mao

Yuan

Zhang

et al. 2016

Env Prog and Sustain Energy

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A multitude of concentrating solar thermal power projects are currently being developed or proposed in many countries. Direct normal irradiance has an important impact on the optical-thermal conversion efficiency and rate of the plants. Though many researches focus on solar radiation, there are not many to emphasize variable air quality in different meteorological conditions. In this paper, aerosol optical depth of the atmosphere based on four wavelengths for three meteorological conditions in China has been experimented. To obtain solar radiation, two researches have been investigated as follows: the one is to calculate turbidity coefficients of the atmosphere according to Angstrom Law for different spectral aerosol optical depths, and another is to calculate the distribution characteristics of aerosol particles in the atmosphere and aerosol optical depths for the broadband using inversion method of experimental data. The results showed that the average value of turbidity coefficients for a clear day has a minimum of 0.9032 and the standard deviation has a maximum of 0.2870. The results also showed that the sizes of aerosol particle and aerosol optical depths for the broadband based on experimental values are different. The results can provide a reference to accurately calculate solar radiation.

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Optical, geometric and thermal study for solar parabolic concentrator efficiency improvement under Tunisia environment: A case study

Cited by 25 publications

References 24 publications

Influence of optical errors on the thermal and thermodynamic performance of a solar parabolic trough receiver

Influence of optical errors on the thermal and thermodynamic performance of a solar parabolic trough receiver

Performance Evaluation of Parabolic Trough Collector With Receiver Position Error

Calculation of aerosol optical depth in solar radiation for different meteorological conditions

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