Determination of error tolerances for the optical design of parabolic troughs for developing countries

Guven, H. M.; Bannerot, Richard

doi:10.1016/0038-092x(86)90018-6

Cited by 81 publications

(39 citation statements)

References 8 publications

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“…The optical errors are represented as normal probability distributions. The total error is given as the sum of individual errors occurring in the system (Güven and Bannerot, 1986) …”

Section: Optical and Thermal Analysismentioning

confidence: 99%

“…The system's optical performance will determine how many of the rays incident on the collector will be intercepted by the receiver and subsequently the heat flux distribution on the receiver. The optical performance of the collector depends on several factors, which include the geometry of the collector, various materials used in the construction of the system and various errors encountered during the construction and/or operation of the system 8 (Güven and Bannerot, 1986). The errors encountered will influence the intercept factor.…”

Section: Introductionmentioning

confidence: 99%

“…The errors encountered will influence the intercept factor. The intercept factor is defined as the ratio of energy intercepted by the receiver to the energy reflected by the concentrating collector (Güven and Bannerot, 1986). Pottler et al (2014) suggest that intercept factors in the range 96-99% are achievable with appropriate collector design, quality components and proper assembly and installation of the collector.…”

Section: Introductionmentioning

confidence: 99%

“…The optical efficiency of the parabolic trough collector system is given by Güven and Bannerot (1986) as…”

Section: Introductionmentioning

confidence: 99%

“…Gaul and Rabl (1980) presented experimental data as well as analytical expressions for the determination of the incidence angle effects on the performance of a parabolic trough collector. Güven and Bannerot, (1986) give a detailed illustration of the different types of errors that are likely to be encountered in parabolic trough collectors. These include: (1) Material errors which include the specularity of the reflective material, transmissivity of the glass cover and absorptivity of the absorber tube coating.…”

Section: Introductionmentioning

confidence: 99%

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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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“…The optical errors are represented as normal probability distributions. The total error is given as the sum of individual errors occurring in the system (Güven and Bannerot, 1986) …”

Section: Optical and Thermal Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…The optical efficiency of the parabolic trough collector system is given by Güven and Bannerot (1986) as…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2016

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Optics of Concentrating Systems

Hénault

Grange

Falcoz

2022

Concentrating Solar Thermal Energy

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Performance Benchmarking of Large Aperture Parabolic Trough Solar Collector for Various Optical Errors and Geometrical Concentration Ratio

Malan

Kumar

2021

Energy Tech

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Clean energy and a pollution-free environment are becoming the necessity of life along with food, drinkable water, and shelter. Across the world, governments are taking the initiative to promote renewable energy and sustainable development. Solar energy is one of the potential renewable energy sources to achieve these objectives. Solar energy can be harnessed in different ways as per end-use requirements such as electricity or heat using appropriate solar energy technologies. [1] This manuscript is focused on one of the most proven and commercially available solar thermal technology, i.e., parabolic trough solar collector (PTSC), which consists of a concentrator, receiver, support structure, and a tracking system. [2] The technology has been commercially available for more than four decades, and since then, researchers have made efforts to improve its performance and reduce its cost. The performance analysis of the PTSC can be categorized into optical, thermal, and structural analysis. [3] The performance investigation of PTSC is indicated by performing the optical analysis followed by the thermal and structural analysis. The optical analysis has been performed by various approaches such as analytical formulation, [4][5][6][7][8][9] measurement techniques [10][11][12][13][14][15][16][17][18] and by modeling software using the Monte Carlo ray tracking approach. [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] The errors and imperfections in the PTSC have a significant effect on the optical performance of the concentrator. The potential optical errors associated with the PTSC are apparent changes in Sun subtended angle, slope errors, tracking errors, misalignment of the receiver tube, and misalignment of the concentrator, etc. Among these errors, subtended angle, slope errors, and tracking errors are classified as random errors that can be addressed statistically. Misalignment of the concentrator and receiver tube is classified as nonrandom errors for which the provision has to be made in the optical model. [34] The analysis of the errors is very important to determine the performance of the PTSC, as the precise manufacturing of the subcomponents and installations are very difficult and expensive. [35] It has been found that the PTSC field's performance does not match the expected performance at the design point. One of the reasons behind that is the inclusion of the optical errors in the system during the manufacturing and the erection of the collector. [35][36][37] Various researchers have analyzed the influence of these errors on optical performance, and a review of the same is provided in Table 1.As highlighted in Table 1, studies are performed to evaluate the effect of these optical errors, such as an error in reflector curvature precision, tracking error, and the alignment error. The

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Determination of error tolerances for the optical design of parabolic troughs for developing countries

Cited by 81 publications

References 8 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

Optics of Concentrating Systems

Performance Benchmarking of Large Aperture Parabolic Trough Solar Collector for Various Optical Errors and Geometrical Concentration Ratio

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