Temperature and thermal stress analysis of parabolic trough receivers

Lei, Dongqiang; Fu, Xuqiang; Ren, Yucong; Yao, Fangyuan; Wang, Zhifeng

doi:10.1016/j.renene.2019.01.021

Cited by 53 publications

(22 citation statements)

References 26 publications

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“…After setting thermal boundary conditions, temperature distribution was obtained as the static boundary condition. The equations for solving the stress and strain are as below 37 :

ε_{xx} = \frac{1}{E} ([], σ_{xx} - μ ((), σ_{yy} + σ_{zz})) + α_{T} ∆ T

ε_{yy} = \frac{1}{E} ([], σ_{yy} - μ ((), σ_{xx} + σ_{zz})) + α_{T} ∆ T

ε_{zz} = \frac{1}{E} ([], σ_{zz} - μ ((), σ_{xx} + σ_{yy})) + α_{T} ∆ T

γ_{xy} = \frac{1}{G} τ_{xy}, γ_{xz} = \frac{1}{G} τ_{xz}, γ_{yz} = \frac{1}{G} τ_{yz},

where σ represents stress, ε represents strain, γ represents angular strain, τ represents shear stress, α T represents thermal expansion coefficient, and ∆T represents temperature variation.…”

Section: Methodsmentioning

confidence: 99%

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A thermal stress analysis of fluid–structure interaction applied to boiler water wall

Zhang

Yang

Nie³

et al. 2020

Asia-Pacific J Chem Eng

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Fluid-structure interaction (FSI), the combination of computational fluid dynamics and computational solid mechanics, is considered as a procedure to determine the stress or strain of the solid under the influence of flow movement. Common parameters such as pressure and temperature that existed in the fluid solver and solid solver are the core factors of date communication in FSI. This work investigated the thermal stress and deformation distribution of the vapor segment of the water wall by numerical simulation under two typical conditions of the 660-MW boiler. The ideal condition and the case with the oxide scale inside were compared to realize the peculiarity of parameter distribution. The results revealed that the peak temperature of water wall was

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“…After setting thermal boundary conditions, temperature distribution was obtained as the static boundary condition. The equations for solving the stress and strain are as below 37 :

ε_{xx} = \frac{1}{E} ([], σ_{xx} - μ ((), σ_{yy} + σ_{zz})) + α_{T} ∆ T

ε_{yy} = \frac{1}{E} ([], σ_{yy} - μ ((), σ_{xx} + σ_{zz})) + α_{T} ∆ T

ε_{zz} = \frac{1}{E} ([], σ_{zz} - μ ((), σ_{xx} + σ_{yy})) + α_{T} ∆ T

γ_{xy} = \frac{1}{G} τ_{xy}, γ_{xz} = \frac{1}{G} τ_{xz}, γ_{yz} = \frac{1}{G} τ_{yz},

Section: Methodsmentioning

confidence: 99%

“…After setting thermal boundary conditions, temperature distribution was obtained as the static boundary condition. The equations for solving the stress and strain are as below 37 :…”

Section: Elasticity Equationmentioning

confidence: 99%

A thermal stress analysis of fluid–structure interaction applied to boiler water wall

Zhang

Yang

Nie³

et al. 2020

Asia-Pacific J Chem Eng

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“…The temperature variation in a glass pane leads to thermal stress and increases the risk of glass breakage, as displayed in Figure 2 a [ 44 ]. When the thermal stress exceeds the critical breaking stress threshold, glass breakage occurs [ 45 , 46 ]. The common causes of glass crack initiation and growth are glass color, outdoor shading patterns, and indoor shading devices, as depicted in Figure 2 b–d [ 47 ].…”

Section: Deterioration Of Aluminum Windowsmentioning

confidence: 99%

Deterioration Mechanisms and Advanced Inspection Technologies of Aluminum Windows

2022

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Aluminum windows are crucial components of building envelopes since they connect the indoor space to the external environment. Various external causes degrade or harm the functioning of aluminum windows. In this regard, inspecting the performance of aluminum windows is a necessary task to keep buildings healthy. This review illustrates the deterioration mechanisms of aluminum windows under various environmental conditions with an intention to provide comprehensive information for developing damage protection and inspection technologies. The illustrations reveal that moisture and chloride ions have the most detrimental effect on deteriorating aluminum windows in the long run, while mechanical loads can damage aluminum windows in a sudden manner. In addition, multiple advanced inspection techniques potential to benefit assessing aluminum window health state are discussed in order to help tackle the efficiency problem of traditional visual inspection. The comparison among those techniques demonstrates that infrared thermography can help acquire a preliminary defect profile of inspected windows, whereas ultrasonic phased arrays technology demonstrates a high level of competency in analyzing comprehensive defect information. This review also discusses the challenges in the scarcity of nanoscale corrosion information for insightful understandings of aluminum window corrosion and reliable window inspection tools for lifespan prediction. In this regard, molecular dynamics simulation and artificial intelligence technology are recommended as promising tools for better revealing the deterioration mechanisms and advancing inspection techniques, respectively, for future directions. It is envisioned that this paper will help upgrade the aluminum window inspection scheme and contribute to driving the construction of intelligent and safe cities.

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“…A finite element model of MTGC-EPA was built to predict the residual strain distribution in glass-ceramics after curing process and provide theoretical comparisons for the experimental monitoring results. The numerical simulation of residual strain in metal-to-glass structure has been demonstrated as a reliable method 19,20 . In this research, the linear-elastic model was applied because there was no obvious plastic deformation happened under the glass transformation temperature.…”

Section: Finite Element Modelmentioning

confidence: 99%

Structural health monitoring of metal-to-glass–ceramics penetration during thermal cycling aging using femto-laser inscribed FBG sensors

Zhong

Diao

et al. 2020

Sci Rep

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Maintaining the mechanical strength and hermetic reliability of metal-to-glass-ceramics electrical penetration assembly (MtGc-epA) is a key concern for ensuring the pressure boundaries of nuclear power plants. the transient temperature change caused by power adjusting or accidents in High Temperature Reactor Pebble-bed Modules may affect the structural health of sealing glass-ceramics, even leading to radiation leakage. to evaluate whether the function could survive temperature variations during the service life, thermal cycling aging experiments were imposed to MtGc-epA. A grating length-mismatched sensing method to monitor the residual strain, an important factor of glass-ceramics structural health, was demonstrated in real-time by femto-laser inscribed fiber Bragg grating (fBG) sensor during the curing process and thermal cycling aging. Scanning electron microscope (SeM) and leakage rate tests were carried out to obtain the comparisons of microstructure and hermeticity before and after the thermal cycling. the residual strain showed a slight growth trend with thermal cycles repetition and it persisted a high value (~ 4,000 με) reflected by both Bragg wavelength shift and spectrum shape. the grating length mismatched single fBG embedded in glassceramics was feasible to demodulate the temperature and strain simultaneously, and the embedded fBG method achieved the structural health monitoring of MtGc-epA during thermal cycling aging with good accuracy and reliability. combining with the results of SeM and leakage rate detecting, the structural health of MtGc-epA was demonstrated to be capable to endure the severe thermal conditions in nuclear reactors. Electrical penetration assembly (EPA) is the essential component to keep integrality of pressure boundaries in nuclear reactors as shown in Fig. 1. However, long-term service at high temperature in HTR-PM may decrease the structural strength and hermeticity of EPA. The failure of pressure boundaries may lead to severe disasters such as radiation leakage of Fukushima Daiichi Nuclear Power Plant, in which the leakage of hydrogen occurred at the penetrations and the gasket seals of the flange 1. As a result, it is significant to ensure the hermetic reliability of EPA at high temperature environment. Metal-to-glass seal structure EPA was widely used in nuclear reactors. This structure, consisting of steel shell, sealing glass and electric conductor, was designed according to the mismatched coefficient of thermal expansion (CTE) 2. The difference between the CTE of steel shell and sealing material generated the residual strain in sealing material after the curing process, which maintained good hermetic reliability of EPA 3. The similar CTE of sealing glass and conductor guaranteed the sealing glass will not be destroyed by the tensile stress resulted from the expansion of central conductor.

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Temperature and thermal stress analysis of parabolic trough receivers

Cited by 53 publications

References 26 publications

A thermal stress analysis of fluid–structure interaction applied to boiler water wall

A thermal stress analysis of fluid–structure interaction applied to boiler water wall

Deterioration Mechanisms and Advanced Inspection Technologies of Aluminum Windows

Structural health monitoring of metal-to-glass–ceramics penetration during thermal cycling aging using femto-laser inscribed FBG sensors

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