Thermoelastic stress in concentrating solar receiver tubes: A retrospect on stress analysis methodology, and comparison of salt and sodium

Logie, William; Pye, John; Coventry, Joe

doi:10.1016/j.solener.2017.12.003

Cited by 92 publications

(39 citation statements)

References 36 publications

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“…For the purposes of code verification, the results presented by Logie (Logie et al, 2018) will be used, the parameters used are listed in Tab 1. For comparison and analysis purposes, the Von Mises equivalent stress is calculated, according to the failure theory, this equivalent stress must be less than the yield stress to ensure that the material remains in the zone of elasticity and plastic deformation failures do not occur.…”

Section: Verificationmentioning

confidence: 99%

“…The thermal stress may have cyclical behavior due to the passage of clouds or the weather conditions of the place; these transient changes may cause temperature rise to the average melting temperature inducing the flow of the material. The permanent presence of creep and fatigue produces plastic deformations to the metal, which in the long term, causes the failure and the decrease of the lifespan of the receiver (Rodriguez-Sanchez et al, 2014) In this context, there are authors who relate the thermal stresses in sodium-operated solar receivers (Conroy et al, 2018a;Conroy et al, 2018b;Logie et al, 2018;Cagnioli et al, 2019;Boerema et al, 2013), in these research, it can be concluded how the thermal stress decreases compared to a receiver operated with molten salts, given the high thermal conductivity and heat transfer rate of liquid sodium. Of these authors, only Boerema includes the change of dimensions and arrangement of the tubes.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of thermal stresses in square ducts of solar receivers operated with liquid sodium

Villafañe¹,

Barraza²,

Schaub³

et al. 2019

Proceedings of the ISES Solar World Congress 2019

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One of the failures in the solar receivers is usually produced by thermal stresses caused by the non-uniformity of the concentrated solar flux and the transient behavior of the climate. The use of liquid sodium as a heat transfer fluid allows to reach higher temperatures to feed more efficient power systems, however, this produces an increase in thermal stresses, putting the safety of the facilities at risk. The change of geometry is an alternative to improve the thermo-mechanical behavior of the receiver tubes. To compare the thermal and hydraulic characteristics, parameters such as the Reynolds number, the pressure loss, the internal heat transfer coefficient, and the mass flow are determined. With these, six equivalences are tested between conventional tubes and square ducts. The results show that for all the conditions of equivalence the thermal stress increases in comparison with a conventional tube, specifically in the corners of the square duct, however, the characteristics of heat transfer and pressure drop can be maintained and improved. These results imply that the use of other geometries can benefit the overall efficiency of the receiver as well as affect the levelized cost of electricity (LCOE).

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Section: Verificationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of thermal stresses in square ducts of solar receivers operated with liquid sodium

Villafañe¹,

Barraza²,

Schaub³

et al. 2019

Proceedings of the ISES Solar World Congress 2019

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“…First, the radial and circumferential temperature distribution are solved using the Gauss-Seidel iterative scheme before coefficients for the harmonic solution are sought using a least-squares fit to the inner and outer tube surface temperatures. The classical method was implemented in a Python script and validated using a solid mechanics solver from the OpenFOAM(R) toolbox 16 .…”

Section: Thermo-elastic Stress Modelmentioning

confidence: 99%

Limits of the cylindrical absorber design for a sodium receiver

Asselineau

Logie

Pye

et al. 2018

AIP Conference Proceedings

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“…Fritsch [ 16 ] increased the mean heat flux density by 200% and peak heat flux by 280% compared with molten salt receiver limits. William R. studied a solar receiver made from stainless steel 316 with liquid sodium as a heat transfer fluid, the thermoelastic stress was 35% lower compared with the receiver working with molten salt [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

An optimisation study of a solar tower receiver: the influence of geometry and material, heat flux, and heat transfer fluid on thermal and mechanical performance

Shatnawi

Lim

Ismail

et al. 2021

Heliyon

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The solar receiver is considered the cornerstone of the solar tower power system. In particular, it receives hightemperature heat flux rays, and extracts the maximum heat energy to be transferred to the heat transfer fluid, while minimising any thermal and mechanical stresses. Reducing the solar receiver size helps to reduce the loss of spillage; consequently, the thermal stress increases. Using a solar receiver with inserted triangular longitudinal fins enhances the heat transfer as well as strengthens the receiver tube. This study aims to optimise the number of fins, heat flux aiming point, heat transfer fluid, nanoparticle effect with molten salt as the base fluid, and type of receiver material. Non-uniform heat flux with the cosine and Gaussian effects have been considered. When the number of fins (N) increases, the maximum temperature (T max ) decreases and the heat transfer is enhanced. When N ¼ 20, T max ¼ 656.4 K and when N ¼ 1, T max ¼ 683.55, while the efficiency for N ¼ 1 is greater by 3% compared to when N ¼ 20. The cosine distribution of heat flux has a higher maximum temperature than the Gaussian distribution by 29% and is 102% higher in receiver efficiency. The thermal efficiency when the heat flux is aimed at the middle point of the receiver is higher by 10% compared with a lower or upper aiming point. Using Al 2 O 3 nanoparticles with a concentration of 0.5 wt.% increases the thermal efficiency by 14% more than when using pure molten salt when Re ¼ 38000. Using liquid sodium is not required to monitor the peak heat flux, and by adding triangular fins the displacement and thermal stress are 6.5 % lower compared to a smooth receiver.

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Thermoelastic stress in concentrating solar receiver tubes: A retrospect on stress analysis methodology, and comparison of salt and sodium

Cited by 92 publications

References 36 publications

Analysis of thermal stresses in square ducts of solar receivers operated with liquid sodium

Analysis of thermal stresses in square ducts of solar receivers operated with liquid sodium

Limits of the cylindrical absorber design for a sodium receiver

An optimisation study of a solar tower receiver: the influence of geometry and material, heat flux, and heat transfer fluid on thermal and mechanical performance

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