Browsing USN Open Archive by Author "Barahmand, Zahir"
Now showing items 1-18 of 18
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Anaerobic Digestion Process Modeling Under Uncertainty: A Narrative Review
Barahmand, Zahir; Samarakoon Arachchige, Gamunu (Peer reviewed; Journal article, 2023)Growing concern about global climate change has led to considerable interest in investigating renewable energy sources such as the biological conversion of biomass to methane in an anaerobic environment. Through a series ... -
Assessing and prioritizing challenges facing bioenergy supply chain in Norway: a Delphi-AHP method
Barahmand, Zahir; Eikeland, Marianne Sørflaten (Peer reviewed; Journal article, 2022)Norway is leading the share of renewable energy in Europe by almost 75%. However, the share of bioenergy in Norway’s energy supply is insignificant. Bioenergy, the most common type of renewable energy, generates more energy ... -
Comprehensive Local Sensitivity Analysis of the ADM1-Based Anaerobic Digestion Process
Barahmand, Zahir (Journal article, 2022)Anaerobic digestion is a popular method for treating waste and producing biogas. It remains challenging to automate and optimize the operation of the digester because of its complex process and suffering from great ... -
CPFD Modeling to study the Hydrodynamics of an Industrial Fluidized Bed Reactor for Alumina Chlorination
Barahmand, Zahir; Jayarathna, Chameera; Ratnayake, Chandana (Journal article; Peer reviewed, 2022)Aluminum is one of the most used metals. Since aluminum has a unique combination of appealing properties and effects, it allows significant energy savings in many applications, such as vehicles and buildings. Although this ... -
CPFD Simulations on a Chlorination Fluidized Bed Reactor for Aluminum Production: An Optimization Study
Barahmand, Zahir; Jayarathna, Chameera; Ratnayake, Chandana (Journal article; Peer reviewed, 2022)Early CPFD simulation studies on designing a fluidized bed reactor for alumina chlorination showed that the model suffers from high particle outflow and dense phase bed channeling. The present study is aimed to optimize ... -
Design of a Medium-Scale Circulating Fluidized Bed Reactor for Chlorination of Processed Aluminum Oxide
Barahmand, Zahir; Aghaabbasi, Omid; Salcido, Jose Luis; Rustad, Emmy Kristine; Jayarathna, Chameera; Ratnayake, Chandana (Journal article; Peer reviewed, 2022)Fluidization is a well-established and widely used technology in the process industry. The production stability and the large effective contact area between the active substances, resulting in high mass and heat transfer ... -
Design of an Industrial Chlorination Reactor using CPFD Simulations
Barahmand, Zahir (Master thesis, 2021)Aluminum is now the world's second most used metal. Since aluminum has a unique combination of appealing properties and functionalities, it allows for significant energy savings in many applications, such as vehicles and ... -
The Effect of Climate and Orientation on the Energy Performance of a Prefab House in Norway
Ghazi, Amirhossein; Barahmand, Zahir; Øi, Lars Erik (Chapter, 2023)Norway has a wide range of climatic conditions throughout the country. The climate varies from coastal to inland areas. Geographic latitude and longitude, as well as the gulf stream oceanic flow, account for this phenomenon. ... -
The Effect of Impurities on γ-Alumina Chlorination in a Fluidized Bed Reactor: A CPFD Study
Barahmand, Zahir; Jayarathna, Chameera; Ratnayake, Chandana (Peer reviewed; Journal article, 2022)Alumina is one of the most widely used materials today, with a total annual production of millions of tonnes of highly pure alumina. A large portion of this is used to make metal aluminum. Apart from that, a growing amount ... -
A fuzzy approach to rebust Social Sustainability Assessment(ISSA)
Akbarinejad Khamene, Tahmineh; Barahmand, Zahir; Temeljotov Salaj, Alenka (Journal article, 2023)Social sustainability has been increasingly recognized as a fundamental component of sustainable development in recent years. It is still challenging to measure social sustainability in comparison to other dimensions of ... -
Life Cycle Assessment of Bioelectrochemical System for Biogas Upgradation
Neupane, Rajani (Master thesis, 2024)The raise in population, technology and infrastructure development is directing the present towards the future of high energy demand. The reduce the consumption of the fossil fuel, renewable energy sector should be boosted ... -
Life Cycle Assessment under Uncertainty: A Scoping Review
Barahmand, Zahir; Eikeland, Marianne Sørflaten (Peer reviewed; Journal article, 2022)Today, life cycle assessment (LCA) is the most widely used approach to model and calculate the environmental impacts of products and processes. The results of LCAs are often said to be deterministic, even though the real-life ... -
Mesh Sensitivity Analysis of an Entrained Flow Biomass Gasifier: A CPFD Study
Timsina, Ramesh; Barahmand, Zahir (Chapter, 2022)Biomass such as agricultural waste, forestry waste, municipal solid waste, and industrial waste, are renewable energy sources that may be used to produce biofuels. Biomass gasification is an effective and promising technology ... -
A Scoping Review on Environmental, Economic, and Social Impacts of the Gasification Processes
Barahmand, Zahir; Eikeland, Marianne Sørflaten (Peer reviewed; Journal article, 2022)In recent years, computer-based simulations have been used to enhance production processes, and sustainable industrial strategies are increasingly being considered in the manufacturing industry. In order to evaluate the ... -
Sensitivity Analysis and Anaerobic Digestion Modeling: A Scoping Review
Barahmand, Zahir; Samarakoon Arachchige, Gamunu (Peer reviewed; Journal article, 2022)A growing awareness of global climate change has led to an increased interest in investigating renewable energy sources, such as the anaerobic digestion of biomass. This process utilizes a wide range of microbial communities ... -
Sensitivity and Uncertainty Analysis in a Circulating Fluidized Bed Reactor Modeling
Barahmand, Zahir; Jayarathna, Chameera; Ratnayake, Chandana (Peer reviewed; Journal article, 2022)As in many real applications, in the world of fine powders and small particles, there are uncertainties and vagueness in the parameters such as particle size, sphericity, initial solid void fraction, envelope density, etc. ... -
Study of the Thermal Performance of Industrial Alumina Chlorination Reactor Based on CPFD Simulation
Barahmand, Zahir; Jayarathna, Chameera; Ratnayake, Chandana (Peer reviewed; Journal article, 2022)As a part of the new sustainable aluminum production process under study, alumina chlorination plays a crucial role. The relevant process is an exothermic reaction in a fluidized bed reactor. The solid alumina reacts with ... -
Techno-Economic and Life Cycle Cost Analysis through the Lens of Uncertainty: A Scoping Review
Barahmand, Zahir; Eikeland, Marianne Sørflaten (Peer reviewed; Journal article, 2022)Researchers have long been interested in developing new economic assessment methods to provide credible information and facilitate the sustainable development of new technologies and products. The techno-economic analysis ...