http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/111 2026-05-02T06:36:07Z 2026-05-02T06:36:07Z Muhammadu Masin, Muhammadu Muhammad, Sule-Sarki http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/30551 2026-04-21T18:35:27Z 2025-11-15T00:00:00Z

Title: Simulink Design and Analysis of Universal Solar Dryer with Tracking Device Authors: Muhammadu Masin, Muhammadu; Muhammad, Sule-Sarki Abstract: Preserving perishable food is one of the challenges required to overcome food security and season tomatoes and other vegetables wastage. Forced drying of agricultural products, in particular vegetable - such as tomatoes is one modern methods of perishable food drying. Solar drying uses abandoned solar energy during the day. Effective solar drying requires tracking of the sun by the drying tray. Therefore, this necessitates the development of solar dryer with tracker. Aim of this paper is to design a solar tracking for drying tomatoes. This paper however, presents Simulink design of these applications of Flywheel Energy Storage System (FESS) in power system and also analyses the design parameters in order to improve the solar energy tracker. A solar dryer with solar tracking was designed. The drying chamber has overall dimensions of 457.2 mm x 406.4 mm x 558.8 mm with three drying trays having a drying area of 0.25 m2 each. The dryer consists of three major units namely, the drying chamber, the solar tracker and a solar powered control. The control unit has four temperature sensors, and four controlled DC fans for varying the air flow rate from the solar collector. The drying chamber is to be lagged with carbon fibre as an insulator. The solar collector made of Aluminum sheet and the glass on top. Fresh tomatoes were used for performance evaluation testing. Each drying tray was loaded with 5 kg of tomato slices of 8 mm thickness from initial moisture content of 93.3% (w.b.) and dried to a final moisture content of 12% (w.b.) in 13 hours, when operated under natural convection current. The maximum drying rate of tomato slices attained under natural convection and forced circulation were 3.1 and 2.8 kg of water per kg of dry matter-hr. For the open-air sun drying, the maximum drying rates for tomato were 1.5 kg of water per kg of dry matter-hr. The dryer was able to remove 52.8% of moisture while tracking the sun, dry basis, from 4.6 kg of product in one day of 10.00 hours drying time, which is about 0.46 kg/hr drying rate. The efficiency of the dryer was 56.25%. Description: Conference CFDRI

2025-11-15T00:00:00Z Egene, M.S Adedipe, O. Okoro, U.G. Obanimomo, K.T. http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/29613 2025-05-14T10:51:33Z 2021-01-01T00:00:00Z

Title: Investigation of Fracture Behaviour of API X70 Pipeline Steel Authors: Egene, M.S; Adedipe, O.; Okoro, U.G.; Obanimomo, K.T. Abstract: Oil and gas production has significantly increased over the years in order to meet future demands for oil and gas products, regardless of the unstable price being experienced by producing nations. The use of pipelines for the transportation of these products has been the globally recognized solution. These pipelines are fabricated by welding and their fracture properties depend on a number of factors which include temperature, particularly for pipelines operating in cold environment such as deeper water depths. Therefore, information of fracture behaviour of welded pipelines located in cold regions is therefore important for reliable design for service. In this paper, fracture behaviour of welded x70 pipeline steel was investigated using charpy v-notch specimens. Impact tests were carried out on weld and parent materials at temperatures -10°C, -20°C, -40°C, -60°C, -80°C, -100°C, -120°C, -160°C, 0°C, 10°C and 20°C. Results revealed that higher energy was absorbed in the weld than in parent materials regardless of the test temperature used. results implied that the fracture behaviour of the material could be significantly influenced by temperature, welding and the notch sensitivity of the materials.

2021-01-01T00:00:00Z Ogboo, H. U. Nasir, A. Jiya, J. Y. Abdulkarim, H. T. http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/29482 2025-05-12T04:50:26Z 2015-01-01T00:00:00Z

Title: SECURITY MANAGEMENT: THE ENGINEERING PERSPECTIVE Authors: Ogboo, H. U.; Nasir, A.; Jiya, J. Y.; Abdulkarim, H. T. Abstract: Security management is a difficult task as everyone agrees that security is a problem. As such, this work aims at addressing the ever increasing security challenge confronting us as individuals from the engineering perspective. Throughout human history, engineering has driven the advance of civilization. This can be seen from the metallurgists who ended the Stone Age to the shipbuilders who united the world’s people through travels and trades; the past witnessed many marvels of engineering prowess. As civilization grew, it became pertinent that the world became confronted with the challenge of survival and relevance and hence, the desire not to be cut out from the basic necessities of life and existence gave rise to devices by humanity to remain relevance and hence, the field of engineering owes it a responsibility to the world to see that this issue is sorted out as usual as it has always provided respite to the world.

2015-01-01T00:00:00Z Olorundare, E F. Bori, Ige http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/29067 2024-08-12T11:46:51Z 2024-06-02T00:00:00Z

Title: PARAMETRIC STUDY ON NATURAL VENTILATION: A CASE STUDY OF ENGINEERING CENTRAL WORKSHOP, FEDERAL UNIVERSITY OF TECHNOLOGY MINNA Authors: Olorundare, E F.; Bori, Ige Abstract: This study provides a literature review on natural ventilation principles, factors affecting airflow, thermal comfort, and the use of Computational Fluid Dynamics (CFD) in building design. The researchers created a detailed 3D model of a workshop and conducted simulations using the DesignBuilder-EnergyPlus software suite. The simulations focused on thermal comfort and were performed on a baseline model with a window-to-wall ratio (WWR) of 30%. The results showed that occupants experienced thermal discomfort for 30.74% of the year, with the remaining 69.26% being comfortable, ranging from "hot" to "slightly warm" sensations. The study then explored the impact of different interventions. Implementing lighting control improved thermal comfort, resulting in a 1.37% increase in the number of hours occupants experienced comfort. The introduction of mechanical ventilation without cooling had a minimal impact on thermal comfort (1.17% improvement). However, when mechanical ventilation and scheduled cooling were combined, there was a significant improvement. The predicted thermal sensation ranged from "slightly warm" to "slightly cool," with most occupants experiencing "neutral" conditions. This strategy increased comfort hours by 14.62% compared to the baseline. While lighting control and mechanical ventilation with fans offered minimal benefits, the combination of mechanical ventilation and scheduled cooling significantly enhanced occupant comfort.

2024-06-02T00:00:00Z