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Showing 24 results for Type of Study: Research
Numerical study of forced convection heat transfer in a tube
Morteza Deilami, Pedram Pournaderi,
Volume 4, Issue 1 (9-2023)
Abstract
 Heat transfer has an effective role in industrial and engineering applications. In this study, the effect of Al2O3 nanoparticles on laminar forced convection heat transfer flow in a tube is studied. Governing Equations are discretized using the finite difference method on a staggered grid. Nanofluid flow is simulated using single-phase and mixture models. Simulation results show that the average Nusselt Number increases with an increase in the Reynolds Number. Also, by increasing the volume fraction, the average Nusselt number and consequently the heat transfer rate increases. The results of the mixture model are in better agreement with experimental results than the single-phase model.
Essentials of corrosion phenomena in lithium-ion batteries
Dr Mohammad Sajjadnejad,
Volume 4, Issue 2 (11-2023)
Abstract
Nowadays, lithium-ion batteries have been commercialized and extensive research is done on improving their properties. The things that are currently the major part of the research are reducing the price of the battery, increasing the energy density of the battery, increasing the lifespan and improving the safety of the battery. In military applications and aviation industries, special attention is paid to battery reliability and safety. The gradual degradation of the materials used in lithium-ion batteries over a long period of time has a negative effect on the electrical performance, lifespan and safety of the battery. This is through increasing the electrical resistance of the battery and even cutting the internal connection of the battery, producing corrosion products and creating passive films on the surface of the material, creating pollutants inside the battery that may react with active materials and leading to loss of uniformity in the material enters the battery and the electrolyte is destroyed. Most of the materials used in lithium-ion batteries were modified after identifying these problems in the battery structure. This article mainly deals with the phenomenon of corrosion in positive and negative current collectors in lithium-ion batteries.
 
Introducing specialized software for economic analysis of biomass power plants in Iran (BIO-ECO)
Soraya Rostami, Elahe Mansouri, Zahra Abbasi,
Volume 4, Issue 2 (11-2023)
Abstract
Biomass energy, generated from organic waste and residues produced by living organisms, is recognized as one of the most promising renewable energy resources after solar energy due to its considerable energy potential. The regulatory framework governing the development, construction, and operation of renewable power plants plays a crucial role in reducing investment risks and promoting the deployment of sustainable energy systems. This paper provides an overview of the current regulations, licensing procedures, and implementation process for biomass power plants in Iran. Furthermore, based on the existing legal and regulatory framework, a localized software package, BIO-ECO, has been developed to perform the economic assessment of biomass power plants. The software was developed as part of the research project entitled "Development of Economic Assessment Software for Solar, Biomass, and Geothermal Power Plants in Iran" conducted at the Niroo Research Institute. BIO-ECO provides a practical and localized platform for evaluating the economic feasibility of biomass power projects in accordance with Iranian regulations and administrative procedure. Thereby can support investors, developers, and decision-makers in planning and investment activities.

 
Evaluation of Energy Use Pattern and Greenhouse Gas Emissions in Sugarcane Production in Iran
Dr. Alireza Khoshroo,
Volume 4, Issue 2 (11-2023)
Abstract
This study evaluates the indices of energy consumption and carbon dioxide (CO₂) emissions in sugarcane production systems of seven agro-industrial units in Khuzestan Province, Iran. For this purpose, data on agricultural input consumption and sugarcane yield were collected from selected farms and analyzed using conventional energy analysis methods. The results showed that the total input energy consumption was 123,000 MJ ha⁻¹. Among the energy inputs, nitrogen fertilizer represented the highest share of input energy consumption (26% of total energy input), followed by irrigation water, electricity, diesel fuel, and sugarcane seed cuttings. Energy use efficiency, energy productivity, specific energy, and net energy in sugarcane production were calculated as 0.76, 0.63 kg MJ⁻¹, 1.57 MJ kg⁻¹, and −29,143.16 MJ ha⁻¹, respectively. In addition, the total greenhouse gas emission was estimated to be 4,081.65 kg CO₂ eq ha⁻¹. The results indicate that the high contribution of non-renewable energy sources in the energy input of sugarcane production presents serious challenges in terms of agricultural sustainability and environmental pollution. Therefore, the adoption of appropriate management strategies aimed at reducing non-renewable energy consumption, improving input use efficiency, and promoting the use of renewable energy sources is essential for enhancing agricultural sustainability and mitigating environmental impacts in sugarcane production systems.
 
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