i-manager's Journal on Future Engineering and Technology (JFET)


Volume 19 Issue 1 October - December 2023

Research Paper

A Comparative Thermodynamic Analysis of Organic Rankine Cycles (ORC) and Kalina Cycle for Low-Grade Energy Resources

Giuma M. Fellah*
Department of Mechanical and Industrial Engineering, University of Tripoli, Libya.
Fellah, G. M. (2023). A Comparative Thermodynamic Analysis of Organic Rankine Cycles (ORC) and Kalina Cycle for Low-Grade Energy Resources. i-manager’s Journal on Future Engineering & Technology, 19(1), 1-8. https://doi.org/10.26634/jfet.19.1.20123

Abstract

This work aims to contribute to the issue of producing electrical power and reducing the emissions of gases into the atmosphere by utilizing low grade energy sources such as solar energy, geothermal energy and the energy that is rejected from industrial processes. The Organic Rankine Cycle (ORC) and Kalina are two cycles used to utilize low-grade energy sources. Each of them differs in the structure and in the working fluids. The organic Rankine cycle uses organic materials as working fluids, such as benzene, R-600a, methanol, propane, R-245f, i-pentane and ammonia while Kalina cycle uses a mixture of ammonia and water as a working fluid. A comparative analysis is implemented to study the thermodynamic performance of the proposed cycles. For the organic cycles, the analysis reveals that benzene and methanol have the best thermodynamic performance compared to the other tested organic fluids. The thermodynamic findings of the organic Rankine cycles are compared with those obtained from the thermodynamic analysis of Kalina cycle of a binary solution of 70% ammonia and 30% water. For instance, the results showed that the methanol and benzene cycles are more efficient than Kalina cycle where the exergy and energy efficiencies of Kalina amounted to 9.41% and 6.224%, while the exergy and energy efficiencies of methanol cycle (ORC) were 18.85% and 12.83%, respectively.

Research Paper

Exergy Efficiency and Exergy Destruction Assessment of Heat Transfer and Fluid Flow through Spiral Passages using Source-Sink Model

Faraj El-Sagier*
Department of Mechanical and Industrial Engineering, University of Tripoli, Tripoli, Libya.
El-Sagier, F. (2023). Exergy Efficiency and Exergy Destruction Assessment of Heat Transfer and Fluid Flow through Spiral Passages using Source-Sink Model. i-manager’s Journal on Future Engineering & Technology, 19(1), 9-18. https://doi.org/10.26634/jfet.19.1.20233

Abstract

Exergy efficiency and exergy destruction of forced turbulent convective fluid flow through spiral passages using sourcesink model are assessed. Constant and temperature dependent thermophysical properties of process fluid in sink regions have been considered, while in the source regions phase change material is kept at constant temperature. Moreover, the effect of a secondary flow phenomenon due to spiral motion of the fluid flow through narrowing spiral passages has been evaluated in the sink passage domain. It was found that this phenomenon plays an important role in decreasing the exergy destruction as a result of energy exchange between source and sink in this compact type of energy carrier or storage equipment. It was found that the De (Dean Number) whose magnitude is a measure of the secondary flow, has positive impact on exergy efficiency while decreasing along the spiral passage. The fluid properties that are temperature dependent have a significant influence on the enhancement of heat transfer process, exergy efficiency and exergy destruction. It is concluded that the source-sink model could be considered from engineering point of view as a good simple model for evaluating the thermodynamic performance of this type of thermal energy process device.

Research Paper

Innovative Approach: Empowering Contextual Consulting in Industry 4.0 through a Hybrid Data Analytics Framework

Neeraj Kumar Rathore* , Vijay Kumar Pandey**
*-** Department of Computer Science, Indira Gandhi National Tribal University, Amarkantak, Madhya Pradesh, India.
Rathore, N. K., and Pandey, V. K. (2023). Innovative Approach: Empowering Contextual Consulting in Industry 4.0 through a Hybrid Data Analytics Framework. i-manager’s Journal on Future Engineering & Technology, 19(1), 19-28. https://doi.org/10.26634/jfet.19.1.20201

Abstract

The Fourth Industrial Revolution, known as Industry 4.0, has ushered in a transformative era for businesses. This paper presents a pioneering framework for contextual consulting practices tailored to the unique challenges and opportunities posed by Industry 4.0. The framework employs a hybrid data analytics approach, integrating advanced methods such as machine learning, predictive modeling, and real-time data processing to empower decision-making processes and offer actionable insights to businesses operating within Industry 4.0. This approach leverages a hybrid blend of data analytics methods to empower decision-making and deliver actionable insights to industries. This paper offers an in-depth exploration of the framework's architecture, its key components, and its practical effectiveness through a compelling case study.

Review Paper

Study of Corrosion and its Preventive Measures

Tusharika Singh* , Santosh Kumar**, Rakesh Kumar***
* Department of Computer Science Engineering, Chandigarh Group of Colleges, Landran, Mohali, Punjab, India.
** Department of Mechanical Engineering, Chandigarh Group of Colleges, Landran, Mohali, Punjab, India.
*** Department of Regulatory Affair and Quality Assurance, Auxein Medical Pvt. Ltd, Sonipat, Haryana India.
Singh, T., Kumar, S., and Kumar, R. (2023). Study of Corrosion and its Preventive Measures. i-manager’s Journal on Future Engineering & Technology, 19(1), 29-47. https://doi.org/10.26634/jfet.19.1.20200

Abstract

Corrosion is one of the primary causes of wear and tear on machine parts and is responsible for reducing the life of machinery parts. Several industrial accidents occur because of pipeline corrosion. There are various methods to protect the materials from oxidation, wear and corrosion. These preventive measures include pretreatments of metals, proper design and selection of right selection, sacrificial method, cathodic protection, barrier protection, electroplating, zinc galvanizing by hot dipping and thermal spray coatings. However among various preventive measures thermal spray coating offered high resistance against erosion, corrosion and oxidation. Therefore, providing an overview of the various types of corrosion, their causes, mechanisms, costs, and related preventive measures is the aim of this study. This information aims to enable proactive measures in mitigating the impact of corrosion-related issues.

Review Paper

Green Hydrogen Feasibility in Oman

Sayath Birose* , Mohammed Junaid Mouda**, Ninzo Thomas***, Ch. Venkateswara Rao****, Teofilo Sabangan*****, Nurul Hasan Shaikh******
*-****** University of Technology and Applied Sciences, Salalah, Sultanate of Oman.
Birose, S., Mouda, M. J., Thomas, N., Rao, Ch. V., Sabangan, T., and Shaikh, N. H. (2023). Green Hydrogen Feasibility in Oman. i-manager’s Journal on Future Engineering & Technology, 19(1), 48-53. https://doi.org/10.26634/jfet.19.1.20274

Abstract

Global warming is one of the most important factors in unpredictable climatic changes and a challenging issue in the world. The MENA region is one of the hottest areas in the world, and most of its revenue is based on oil resources. The sultanate of Oman, as per Vision 2040, aims to increase the number of renewable energy plants to reduce their electrical energy dependence. At present, Oman produces 650 MW of electrical power using renewable energy sources, this may increase in the upcoming years. High energy density and transportability make hydrogen a suitable energy carrier compared to the existing fossil fuels. This paper discusses the various possible techniques to produce green hydrogen and a brief comparative study of these techniques for their feasibility in the regional scenario so that an effective usage of hydrogen sources and better energy management can be achieved in Oman. Hence, making the usage of green hydrogen as a renewable energy source more feasible and conventional in the upcoming years is in line with Vision 2040.