Process Plant Upgradation Using Reliability, Availability, and Maintainability (RAM) Criteria

Bai, Dongqiao; Yang, Qi; Zhang, Jian; Li, Shouzhi

doi:10.1155/2022/4287346

Cited by 3 publications

(2 citation statements)

References 34 publications

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“…However, a detailed design of the solution and structural and thermal analysis by simulations and application of the maintenance operations in a virtual environment are still required to support the proposed design solutions. Dongqiao Bai et al (12) focused on the Fuzzy-TOPSISbased update of process plant control systems using RAM (reliability, availability, and maintainability). They provide an answer to the problem of process plant upgrades going extinct due to parts' obsolescence.…”

Section: Introductionmentioning

confidence: 99%

Increasing the Steam Boiler Maintainability Adopted Design Factors

Hameed,

Al-kindi,

Hashim Hassoon

2024

Salud, Ciencia y Tecnología - Serie de Conferencias

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Companies are increasingly compelled to evaluate all dimensions of product performance in order to maintain competitiveness in the face of global market challenges. Maintainability is a crucial aspect of product performance. Maintainability refers to a product's economical and efficient ability to undergo maintenance. Maintenance is necessary for the proper functioning and longevity of several durable items. Adopting maintainability design factors during the first stages of the design process can reduce maintenance expenses, minimize maintenance time, and enhance safety measures. In this paper, the steam boiler is studied and how to improve its maintainability through design factors to make it more maintainable. In order to reduce the time required to perform maintenance and thus reduce the system's downtime and make it available for a longer time, thus increasing production. The case study adopted in this paper is the steam boiler of the thermal power plant in south Baghdad. A study of the steam boiler was conducted, and maintainability was calculated according to the data obtained from the station. A part of the boiler was chosen to improve its maintainability, which is the air heater, as it is the most essential part due to its frequent malfunctions. A study was conducted on the air heater and its parts. The overhead crane was developed by suggestion into an improved design as a tool for accessibility, considered an important design factor for ease of access and handling and, at the same time, for the safety of maintenance workers. This improvement reduced from 24 to 48 hours of repair time for each fault, and the results after calculating the maintainability of the steam boiler after the improvement showed that it increased from 48.5% to 53.5%, i.e., an increase of 5%.

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Section: Introductionmentioning

confidence: 99%

Increasing the Steam Boiler Maintainability Adopted Design Factors

Hameed,

Al-kindi,

Hashim Hassoon

2024

Salud, Ciencia y Tecnología - Serie de Conferencias

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“…The potential use of these copper-iron sulfide minerals in areas of thermoelectrics − and solar-conversion processes (i.e., photovoltaics, photocatalysis, and photoelectrocatalysis) has been discussed. ,,, Both bornite and chalcopyrite have physical properties, which make them amenable to deploy in thin film type III solar cells including intrinsic semiconduction arising from defects, high absorption coefficients across the visible and NIR spectrum, and tunable band gaps. , However, research is still required to enhance the understanding of the formation of thin films of these bimetallic sulfides. For example, the choice of manufacturing route can heavily influence the final composition, crystalline quality, and overall purity of the resulting thin films and hence the performance of any device. ,− …”

Section: Introductionmentioning

confidence: 99%

Fabrication of High Quality Bornite and Chalcopyrite Thin Films by Aerosol-Assisted Chemical Vapor Deposition

Barde,

Lewis

2023

J. Phys. Chem. C

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Recently, several transition metal chalcogenide materials with favorable optical and electrical properties suitable for sustainable solar-based energy generation have been identified. In this work, thin films of two promising ternary sulfides (bornite and chalcopyrite) in the Cu–Fe–S system were successfully synthesized as thin films from utilizing tris-N,N-diethyldithiocarbamate iron(III) and bis-N,N-diethyldithiocarbamate copper(II) molecular precursors in aerosol-assisted chemical vapor deposition at 450 °C for 1 h. The deposited thin films were studied by powder X-ray diffraction, and the resulting patterns were indexed to orthorhombic and tetragonal copper iron sulfide (bornite, Cu5FeS4 and chalcopyrite, CuFeS2). The morphology of the films at the microscale was explored by scanning electron microscopy, revealing a polycrystalline thin film with elemental ratios (i.e., Cu:Fe:S) of the two materials corresponding to those expected for bornite (≈5:1:4) and chalcopyrite (≈1:1:2), consistent with the X-ray structural characterization. Characterization of the electrical transport properties of these high-quality thin films by the four-point probe method was performed. The results revealed resistivities of 1.8 × 10–4 Ω·m for bornite and 1.6 × 10–2 Ω·m for chalcopyrite, which are consistent with previously reported values for the bulk materials. Estimation of the optical energy band gap from Tauc plots of the ultraviolet-visible spectroscopy data was taken for bornite and chalcopyrite giving direct band gap energies of 1.28 and 0.97/1.62 eV, respectively, demonstrating their potential utility as either solar absorbing thin films or for photocatalysts for water splitting.

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