Engineering

Research Papers/Topics in Engineering

Impact Damage to Selected Agricultural Produce from South Eastern Nigeria.

ABSTRACTAn Impact Test Apparatus was developed to determine the impact damage and bruise parameters of five fresh agricultural produce, namely: banana (Musa spp), tomato (Lycopersicon esculentum), sweet potato (Ipomea batatas), cassava tuber (Manihot esculenta) and lemon (Citrus limon) using Impact – Drop Height method. A constant impact energy of 0.9J – 4.5J was maintained as drop heights ranged from 0.20m – 1.00m. The bruise diameter, bruise depth, bruise width, bruise volume, bruise ...

Selected Physical And Aerodynamic Properties Of African Breadfruit (Treculia africana) Seeds From South Eastern Nigeria

Physical and aerodynamic properties of African breadfruit (Treculia africana) seeds were studied at four moisture levels: 12.50, 15.00, 17.50 and 20.10% dry base (w.b). As moisture content increased from 10.50 to 20.10% (w.b), the average weight, major diameter, minor diameter, intermediate diameter, geometric mean diameter, arithmetic mean diameter of the seeds ranged from 0.35±0.08 to 0.60g±0.04g, 8.08±0.90 to 10.05±0.60mm, 4.04±0.53 to 5.00±0.10mm, 2.96±0.43 to 4.60±0.40mm, 4.52±0...

Performance Analysis of High-Efficiency Motor and Variable Speed Drive in Black Tea Processing Machinery

AbstractPurpose: The present old standard efficiency motors (SEM) in black tea processing machinery consume large amount of electricity, thus increases the cost of production. Technologically improved high-efficiency motors (HEM) or HEM coupled with variable speed drive (VSD) could be useful to achieve high-energy efficiency. Therefore, a study was conducted with the focus to determine the feasibility of introducing HEM and VSD in withering and rolling machinery of black tea manufacturing.Met...

Drilling Cost Optimization for Extended Reach Deep Wells Using Artificial Neural Networks

AbstractGlobal Petroleum reserves are currently getting depleted. Most of the newly discovered oil and gas fields are found in unconventional reserves. Hence there has arisen a need to drill deeper wells in offshore locations and in unconventional reservoirs. The depth and difficulty of drilling terrains has led to drilling operations incurring higher cost due to drilling time. Rate of Penetration is dependent on the several parameters such as: rotary speed(N), Weight-On-Bit, bit state, f...

Optimization of the Operating Parameters for the Extractive Synthesis of Biolubricant from Sesame Seed Oil via Response Surface Methodology

This study examined the optimization of the transesterification reaction of sesame methyl esters (SMEs) with trimethylolpropane (TMP) to synthesise sesame biolubricant (SBL). Response surface methodology (RSM) using central composite design (CCD) was employed for the experimental design. Effects of temperature, mole ratio and reaction time on the yield of SBL were evaluated. The predicted yield after process optimization was found to agree satisfactorily with the experimen...

Production of Environmentally Adapted Lubricant Base Stock from Jatropha Curcas Specie Seed Oil

Jatropha curcas seed oil was studied for the synthesis of trimethylolpropane based biolube basestock via chemical transesterification of Jatropha methylester with trimethylolpropane (TMP) using calcium hydroxide catalyst. Reactions temperatures ranged between 80 and 160 C and methyl esters to TMP mole ratios ranged between 3:1 and 7:1. Product analysis, ester groups and physio-chemical properties were obtained by gas chromatography, Fourier transform i...

Synthesis and Tribological Evaluation of Sesame Oil-based Trimethylolpropane Ester

Synthesis of polyol ester as a novel biodegradable base stock from sesame seed oil for lubricant production was conducted via chemical transesterification of sesame methylester with trimethylolpropane (TMP) using calcium hydroxide catalyst. The reactions were carried out under varying temperatures (80 C160 C) and methyl esters to TMP mole ratios (3:1 to 7:1). Product’s analysis was performed using gas chromatography. Product’s physicochemical characteristics determi...

EXERGY ANALYSIS OF COUNTER FLOW FORCED DRAFT WET COOLING TOWER (CASE STUDY OF PORT HARCOURT REFINERY)

This study evaluated the exergy analysis of the mechanical forced draft counter flow of the Port Harcourt Refinery cooling towers. The exergy analysis was carried out using the exergy destruction method. The results of the investigation and optimization show that the exergy destruction increases with the increases in mass flow rates of the cooling water, makeup water, and Air. Also, exergy destruction decreases with the decreases in Humidity Ratio, Heat sink Temperature, and&nb...

A Study On Geotechnical Investigation Of Dhaka Mass Rapid Transit Development Project (Dhaka Metro Rail)- Line-06

ABSTRACT      Metro Rail is a mass rapid transportation system and also environment friendly. It is also a modern technology for transportation. To overcome the future demand and to make a short and less time consuming transportation system, Bangladesh Government has taken this project. It is a fast and time saving transportation system which is really needed for Dhaka. This study covers to find out geotechnical investigation and to compare the pile bearing  capacity&...

Classification of Ultra-high Performance Concrete (UHPC)

Ultra-high performance concrete (UHPC) been an advanced concrete introduced as reactive powder concrete (RPC) over twenty years ago, is now being employed for use in the construction industry of some developed countries like China, Germany and United States of America. Its excellent properties in structural performance and durability make it the civil engineering material that will reshape the future of the construction industry in terms of structural performance; and this paper aims at helpi...

An Investigation on Types of Litter Found Along the Walvis Bay Promenade

Table of ContentIntroduction Objectives Study design Data collection Results Discussion Recommendation ReferencesIntroductionLitter is the improper disposal of waste products through human activities (Berglund, Koivula & Eeva 2011). Why people litter? Dropping litter where litter has already accumulated. Lack of knowledge on the effects of litter on the environment. Laziness & IgnoranceA promenade is a public walkway, typically along the sea f...

Fluidized Bedreactor Modelling and Simulation with ASPEN Plus for Alumina (AL2O3) Production Systems.

AbstractFluidized bed reactor is useful for heterogeneous (multi phase) reactions, separations, size enlargement, coating, and blending in chemical and pharmaceuticals industries. To develop a model and simulation of this reactor with advanced systems process engineering software (Aspen Plus). Aspen plus has the capability to simulate real factory performance, design improved plants, and intensify profitability in present plants. This modeling and simulation are applied Geldart B particle cla...

Nanoparticle Delivery via Stocky SWCNTs, A Nonlinear-Nonlocal Continuum-based Scrutiny

Excellent mechanical properties plus to the good biocompatibility of single-walled carbon nanotubes (SWCNTs) are offering them as efficient nanodevices for delivering of nanoparticles. Due to the friction between the outer surface of the nanoparticle and the inner surface of the SWCNTs, mass weight of the nanoparticle, and the interactional van der Waals (vdW) forces between the constitutive atoms of the nanoparticle and those of the SWCNT, both longitudinal and transverse waves propagate wit...

Nonlinear Vibrations of a Single-walled Carbon Nanotube for Delivering of Nanoparticles

The capability of carbon nanotubes (CNTs) in efficient transporting of drug molecules into the biological cells has been the focus of attention of various scientific disciplines during the past decade. From applied mechanics points of view, translocation of a nanoparticle inside the pore of a CNT would result in vibrations. The true understanding of the interactive forces between the moving nanoparticle and the inner surface of the CNT is a vital step in factual realization of such vibrations...

On the Interaction of a Single-walled Carbon Nanotube with a Moving Nanoparticle Using Nonlocal Rayleigh, Timoshenko, and Higher-order Beam Theories

Interaction of a moving nanoparticle with a single-walled carbon nanotube (SWCNT) is of concern. The SWCNT is simulated by an equivalent continuum structure (ECS) under simply supported boundary conditions. The moving nanoparticle is modeled by a moving point load by considering its full inertial effects and Coulomb friction with the inner surface of the ECS. The ECS under the moving nanoparticle is modeled based on the Rayleigh, Timoshenko, and higher-order beam theories in the context of th...


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