Experimental and theoretical studies on the natural circulation behavior of molten salt loop

Srivastava, A. K.; Kudariyawar, Jayaraj Yallappa; Borgohain, A.; Jana, S. S.; Maheshwari, N. K.; Vijayan, P.K.

doi:10.1016/j.applthermaleng.2015.12.065

Cited by 45 publications

(10 citation statements)

References 18 publications

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“…So far, mostly, water has been used as a working fluid for low temperature and molten salt or metal has been used for nuclear reactor applications. 17 Recently, the usage of nanofluids in the passive system attracted the attention of the research community due to its extraordinary performance characteristics explored by Nayak et al [18][19][20] They experimentally investigated the influence of nanofluids on stability behavior and heat transport capability of rectangular SPNCL and reported the enhanced stability and heat transport capability using nanofluids. The influence of inclination of the loop and sink temperature on thermal performance and stability of SPNCL using water-based Al 2 O 3 nanofluid was experimentally explored by Misale et al 21 Performance of SPNCL was studied experimentally by using Al 2 O 3 /water and Ag/water nanofluid by Doganay et al 22 and Koca et al, 23 respectively.…”

Section: Introductionmentioning

confidence: 99%

“…Nonetheless, the heat transport capability of SPNCL depends on the thermos‐physical properties of a working fluid. So far, mostly, water has been used as a working fluid for low temperature and molten salt or metal has been used for nuclear reactor applications 17 . Recently, the usage of nanofluids in the passive system attracted the attention of the research community due to its extraordinary performance characteristics explored by Nayak et al 18‐20 They experimentally investigated the influence of nanofluids on stability behavior and heat transport capability of rectangular SPNCL and reported the enhanced stability and heat transport capability using nanofluids.…”

Section: Introductionmentioning

confidence: 99%

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Steady‐state and transient hydrothermal analyses of single‐phase natural circulation loop using water‐based tri‐hybrid nanofluids

2021

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Transient and steady-state characteristics of the natural circulation loop are studied using various water-based tri-hybrid (different nature and shaped nanoparticles) nanofluids. Effects of input power, loop inclination and loop aspect ratio on the mass flow rate, effectiveness, and entropy generation rate are studied. Results disclose that tri-hybrid nanofluids reduce the oscillation and attain steady state faster than water. Effectiveness increases and entropy generation rate decreases by using trihybrid nanofluids. Nanoparticle shape has found a significant impact. Al 2 O 3 + Cu + CNT/water shows the best performance. The mass flow rate increases with input power, loop aspect ratio, whereas, reduces with loop inclination. Effectiveness decreases and then increases with input power, whereas increases with loop inclination and decreases with loop aspect ratio. Entropy generation upsurges with input power and loop inclination, whereas decreases with loop aspect ratio. Loop aspect ratio of 1.5 to 3 is found suitable for better performance.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Steady‐state and transient hydrothermal analyses of single‐phase natural circulation loop using water‐based tri‐hybrid nanofluids

2021

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“…The study of natural circulation that utilized molten salt as a working fluid has been carried out by several researchers. The work in papers 24,25 utilized molten nitrate salt consisted of a mixture of NaNO 3 and KNO 3 at a ratio of 60:40 as the working fluid in the natural circulation loop (NCL) with vertical heater and horizontal cooler. Paper 26 utilized molten nitrate salt consisted of a mixture of KNO 3 ‐NaNO 2 ‐NaNO 3 with a ratio of 53‐40‐7 wt% as the working fluid in the NCL with double heat exchangers.…”

Section: Introductionmentioning

confidence: 99%

Experimental and simulation approach of the loop geometry effect on the natural circulation system of the advanced nuclear reactor

2020

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Summary Lately, natural circulation has become an exciting topic because it has been proposed and applied in some advanced nuclear reactors as a passive safety system. The aim of the present study is to examine the effect of the loop geometry on the natural circulation based cooling system of a given power source. The experimental approach was achieved by the construction of two natural circulation loops with vertical heater and vertical cooler. Both circulation loops were built with a same vertical length of 100 cm and different horizontal lengths, each of 50 and 100 cm, respectively. The heater was realized with a stainless pipe wrapped by a Nichrome wire, whereas the cooling system was designed and built as a pipe in 30 cm long square tube. Thus, the cooling water will circulate around the pipe loop inside the rectangular cooling chamber. The temperature data acquisition was achieved via an Arduino‐based system, controlling four K‐type thermocouple sensors. The numerical simulation part in the present work, was carried out by the COMSOL Multiphysics software, using the dedicated heat transfer and fluid dynamic module, namely the computational fluid dynamic module. The experimental data were considered to parameterize the COMSOL input model. The experimental results showed a clear difference between two passive cooling loops according to the horizontal length. The doublings of the horizontal and vertical lengths of the loop have a direct effect on the fluid flow rate.

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“…), which makes them unsuitable for use in a bulk supply scenario, which requires high reliability and consistency. Although it is possible to use large-scale intermittent energy storage techniques such as pumped hydro storage [3], compressed air energy storage (CAES) [4], molten salt loops [5], material phase changes [6] and others in order to levelized the power supply from intermittent renewables, the high variability of renewables coupled with the limited capacity of energy storage techniques make for significantly difficult planning and operability concerns. These problems are further exacerbated by the low capacities of renewables and round-trip efficiency losses in potential energy storage systems, both of which must be improved before renewable energy sources will be capable of fully displacing fossil fuel-based power.…”

Section: Introductionmentioning

confidence: 99%

Application of a two-level rolling horizon optimization scheme to a solid-oxide fuel cell and compressed air energy storage plant for the optimal supply of zero-emissions peaking power

Nease

Monteiro

Adams

2016

Computers & Chemical Engineering

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The following article is a "post-print" of an article accepted for publication in an Elsevier journal.Nease J, Montiero N, Adams TA II. Application of a two-level rolling horizon optimization scheme to a solid-oxide fuel cell and compressed air energy storage plant for the optimal supply of zero-emissions peaking power, Computers & Chemical Engineering, 94:235-249 (2016) The post-print is not the final version of the article. It is the unformatted version which was submitted for peer review, and may contain any changes made as the result of reviewer feedback. It does not contain any corrections made during the proofing and typesetting stages. Therefore, there may be minor differences between this version and the final version of record.The final, official version of the article can be downloaded from the journal's website via this DOI link when it becomes available (subscription or purchase may be required): AbstractWe present a new two-level rolling horizon optimization framework applied to a zeroemissions coal-fueled solid-oxide fuel cell power plant with compressed air energy storage for peaking applications. Simulations are performed where the scaled hourly demand for the year 2014 from the Ontario, Canada market is met as closely as possible. It was found that the proposed twolevel strategy, by slowly adjusting the SOFC stack power upstream of the storage section, can improve load-following performance by 86% compared to the single-level optimization method proposed previously. A performance analysis indicates that the proposed approach uses the available storage volume to almost its maximum potential, with little improvement possible without changing the system itself. Further improvement to load-following is possible by increasing storage volumes, but with diminishing returns. Using an economically-focused objective function can improve annual revenue generation by as much as 6.5%, but not without a significant drop-off in load-following performance.

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Experimental and theoretical studies on the natural circulation behavior of molten salt loop

Cited by 45 publications

References 18 publications

Steady‐state and transient hydrothermal analyses of single‐phase natural circulation loop using water‐based tri‐hybrid nanofluids

Steady‐state and transient hydrothermal analyses of single‐phase natural circulation loop using water‐based tri‐hybrid nanofluids

Experimental and simulation approach of the loop geometry effect on the natural circulation system of the advanced nuclear reactor

Application of a two-level rolling horizon optimization scheme to a solid-oxide fuel cell and compressed air energy storage plant for the optimal supply of zero-emissions peaking power

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