Design, fabrication, testing and operation of a simulation facility for high temperature molten salt studies

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Harinath Venkata Yadavalli ◽  
T.V Krishna Mohan ◽  
Rangarajan S ◽  
Shaju K. Albert
Keyword(s):  
High Temperature ◽  
Molten Salt ◽  
Material Selection ◽  
Maximum Temperature ◽  
Concentrated Solar Power ◽  
Content Type ◽  
Corrosion Studies ◽  
Degradation Of Materials ◽  
Selection Of ◽  
Static Corrosion

Purpose Concentrated solar power and molten salt reactors use molten salts for heat energy storage and transfer. FLiNaK salts are being proposed to be used in these plants. However, structural material compatibility is the main hurdle for using molten salt in these systems. Hence, it is essential to study the degradation of materials in high temperature molten FLiNaK salt environment. In view of this paper aims to describe, a simulation facility which was established and operated for carrying out high temperature static corrosion studies of materials under molten FLiNaK salt. Design/methodology/approach This paper describes about the design criteria, method of designing using ASME codes, material selection, fabrication, testing, commissioning and operation. Also, a few experimental results have been illustrated. Findings A simulation facility could be designed, fabricated, commissioned and is being successfully operated to carry out corrosion experiments under static molten FLiNaK environment. Research limitations/implications The facility has been designed for 800°C and maximum temperature of experiment would be restricted to 750°C. The materials tested in this facility can be validated only up to 750°C temperature. A maximum of four exposure periods can be studied at a time with around ten specimens for each exposure. Originality/value Selection of compatible material for the facility and design certain unique features like extracting exposed specimens of intermediate periods without actually shutting down the autoclave and measuring the level of molten salt at high temperature.

Selection of selective laser sintering materials for different applications

2015 ◽  
Vol 21 (6) ◽  
pp. 630-648 ◽  
Author(s):  
Sunil Kumar Tiwari ◽  
Sarang Pande ◽  
Sanat Agrawal ◽  
Santosh M. Bobade
Keyword(s):  
Process Parameters ◽  
High Performance ◽  
Material Selection ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Optimal Process ◽  
Content Type ◽  
Volume Production ◽  
High Performance Application ◽  
Selection Of

Purpose – The purpose of this paper is to propose and evaluate the selection of materials for the selective laser sintering (SLS) process, which is used for low-volume production in the engineering (e.g. light weight machines, architectural modelling, high performance application, manufacturing of fuel cell, etc.), medical and many others (e.g. art and hobbies, etc.) with a keen focus on meeting customer requirements. Design/methodology/approach – The work starts with understanding the optimal process parameters, an appropriate consolidation mechanism to control microstructure, and selection of appropriate materials satisfying the property requirement for specific application area that leads to optimization of materials. Findings – Fabricating the parts using optimal process parameters, appropriate consolidation mechanism and selecting the appropriate material considering the property requirement of applications can improve part characteristics, increase acceptability, sustainability, life cycle and reliability of the SLS-fabricated parts. Originality/value – The newly proposed material selection system based on properties requirement of applications has been proven, especially in cases where non-experts or student need to select SLS process materials according to the property requirement of applications. The selection of materials based on property requirement of application may be used by practitioners from not only the engineering field, medical field and many others like art and hobbies but also academics who wish to select materials of SLS process for different applications.

High Temperature Corrosion Studies in Molten Salt Using Salt Purification and Alloy Coating

2016 ◽  
Vol 59 (3) ◽  
pp. 242-257 ◽  
Author(s):  
S.S. Sawant ◽  
B.D. Gajbhiye ◽  
S. Tyagi ◽  
C.S. Sona ◽  
R. Divya ◽  
...  
Keyword(s):  
High Temperature ◽  
Molten Salt ◽  
Alloy Coating ◽  
High Temperature Corrosion ◽  
Corrosion Studies

scholarly journals Autoclave design for high pressure-high temperature corrosion studies

2015 ◽  
Vol 13 (4) ◽  
pp. 539-555 ◽  
Author(s):  
B.A. Lasebikan ◽  
A.R. Akisanya ◽  
W.F. Deans
Keyword(s):  
Aqueous Solution ◽  
High Pressure ◽  
High Temperature ◽  
Corrosion Behaviour ◽  
Testing Machine ◽  
Content Type ◽  
High Pressure High Temperature ◽  
Corrosion Studies ◽  
Wide Range ◽  
Design Pressure

Purpose – The purpose of this paper is to develop an autoclave that can be used to assess corrosion behaviour of suitable material in high-pressure–high-temperature (HPHT) environments. Many new discoveries of oil and gas field are in HPHT environments. The development of such fields requires appropriate selection of materials that are able to withstand not just the service loads but also corrosive production fluids in the HPHT environment. Design/methodology/approach – The exposure of material samples to elevated pressure and temperature is usually done using an autoclave. The suitability of an existing autoclave for HPHT corrosion studies is provided together with suggestions on necessary design modifications. An alternative design of the autoclave is proposed based on functionality requirements and life cycle cost assessment. Findings – It is concluded that the existing autoclave was unsuitable for HPHT corrosion tests, and modifications were very expensive to implement and/or not foolproof. A new autoclave was designed, manufactured, tested and successfully used to study the effect of aqueous solution on the corrosion of a pipe subject to a combination of axial tension, internal pressure and elevated temperature. Research limitations/implications – The maximum design pressure of 15 MPa is more than sufficient for high-pressure corrosion studies in aqueous solution where partial pressure of the dissolved gas is one of the main controlling parameters. However, the design pressure is only suitable for corrosion studies in a seawater environment of up to 1,500 m water depth. Originality/value – A new design of autoclave together with all the necessary piping, assembly and control system is proposed for HPHT corrosion studies. The autoclave can be used as standalone or integrated with a mechanical testing machine and thus enables corrosion studies under a wide range of loading.

Life Cycle Assessment of a high temperature molten salt concentrated solar power plant

Solar Energy ◽  
2011 ◽  
Vol 85 (5) ◽  
pp. 1101-1108 ◽  
Author(s):  
Vincenzo Piemonte ◽  
Marcello De Falco ◽  
Pietro Tarquini ◽  
Alberto Giaconia
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
High Temperature ◽  
Power Plant ◽  
Molten Salt ◽  
Solar Power ◽  
Solar Power Plant ◽  
Concentrated Solar Power

scholarly journals Alloy Selection and C-276 Code Design Value Extension for Advanced Molten Salt Technology Test Facilities Experimentation

2020 ◽  
Author(s):  
Weiju Ren ◽  
Kevin Robb
Keyword(s):  
High Temperature ◽  
Molten Salt ◽  
Pressure Vessel ◽  
Rupture Life ◽  
Maximum Temperature ◽  
Code Design ◽  
Allowable Stress ◽  
Research Activities ◽  
Design Values ◽  
Molten Fluoride

Abstract Molten halide salts are being considered as working fluids for nuclear and concentrated solar power applications. High temperature molten fluoride and chloride salts are known to preferentially attack and deplete Cr in alloys, which leads to the use of high-Ni low-Cr alloys in test facilities for advanced molten salt technology. Alloy C-276 is a commercially available Ni alloy that has adequate Cr contents and is qualified to the maximum temperature of 677°C (1,251°F) in the Boiler and Pressure Vessel Code. The alloy has good corrosion resistance to acids, is resistant to stress-corrosion cracking, and has long track records of use in the chemical industry. Therefore, it has been considered as a structural material for test facilities that require operations at 700°C (1,292°F) or greater to develop high-temperature molten salt technology. To meet the requirements, predictions of the Maximum Allowable Stress above the usage temperatures permitted by the Boiler and Pressure Vessel Code were developed with experimental data as an extension to the current code design values. Analysis showed that above current Codified maximum temperature, strength of the alloy is mainly controlled by creep rupture life under the average stress, although the Sc creep rate criterion is close to the Favg.Savg rupture criterion. This paper presents the intended test facilities and the design requirements, alloy selection considerations, literature review, data analysis, and proposed allowable stress extension based on some creep test data for C-276 at temperatures greater than 677°C (1,251°F). Further research activities are also briefly mentioned.

scholarly journals Definition of the Main Features of Material Assemblies for Thermal Protective Clothing During External High-temperature Effect Modelling

Tekstilec ◽  
2021 ◽  
Vol 64 (2) ◽  
pp. 136-148
Author(s):  
Nataliia Ostapenko ◽  
◽  
Marina Kolosnichenko ◽  
Larysa Tretiakova ◽  
Tatyana Lutsker ◽  
...  
Keyword(s):  
High Temperature ◽  
Protective Clothing ◽  
Heat Insulation ◽  
Material Selection ◽  
Experimental Tests ◽  
Heat Resistant ◽  
Lack Of Information ◽  
Thermal Protective Clothing ◽  
Definition Of ◽  
Selection Of

A computational-experimental method of material selection for thermal protective clothing design is proposed in this article. The intended operating temperature of the garment lies within the range of 40−170 °С. The prereq¬uisite for the research was the lack of information regarding changes in the physical-mechanical and ergonomic characteristics of material assemblies during their use under high-temperature conditions. During the initial stage of research, there was a problem associated with the selection of the most important and the exclusion of the least significant indicators, in order to further reduce the number of experimental tests in laboratory and industrial conditions. The authors used the method of expert evaluations to solve the problems related to the selection of the most significant indicators for material assemblies. Material assemblies were formed by vary¬ing the combinations of heat-resistant, heat-insulation and lining layers of materials. Initial information for the proposed method was obtained from the experimental tests of sixteen material assemblies. According to the results of the ranking, the main parameters of material assemblies were identified as follows: the temperature range for which the use of clothing is intended, thickness, mass per unit density, rupture resistance, relative tear¬ing elongation, change in linear dimensions during mechanical loads, air permeability and change in assembly thickness during cyclic loads. It was established that the assembly that includes heat-resistant material of the Nomex comfort N.307 220 top, Nomex Serie 100 heat-insulation lining and Nomex TER 135 lining provides the necessary level of protection, reliability and ergonomics, and meets cost requirements.

High temperature corrosion studies in molten salt-FLiNaK

2013 ◽  
Vol 49 (4) ◽  
pp. 287-295 ◽  
Author(s):  
C. S. Sona ◽  
B. D. Gajbhiye ◽  
P. V. Hule ◽  
A. W. Patwardhan ◽  
C. S. Mathpati ◽  
...  
Keyword(s):  
High Temperature ◽  
Molten Salt ◽  
High Temperature Corrosion ◽  
Corrosion Studies
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