Rivers State University of Science and Technology

About: Rivers State University of Science and Technology is a education organization based out in Port Harcourt, Rivers, Nigeria. It is known for research contribution in the topics: Population & Threatened species. The organization has 1826 authors who have published 1833 publications receiving 15183 citations.

Optimal economic retrofit of heat exchanger network

Abstract: The application of Linear Programming to minimize utility cost is considered most attractive perhaps because of the central role energy plays in global economy and indeed in the Nigerian economy. This work is therefore focused at proper energy management in an energy recovery system being a heat exchanger network (HEN). The chosen case study is the pre-heat train of the Port Harcourt Refinery due to its energy intensive nature. The purpose of this work is the determination of minimum utility requirements for optimal energy recovery. The data as shown in the work was obtained form the Refinery process flow charts and automated control readings. It was discovered that utility requirements could be optimal reduced by this approach hence cost savings could accrue.

Use of Fishpond Recommendations in the Rural Niger Delta of Nigeria

Abstract: Application of fishpond production recommendations by rural beneficiaries of the Green River Project in the Niger Delta region of Nigeria was examined in this study. A sample size of 270 beneficiaries of the Project was selected through stratified and random sampling methods. Data elicited through the questionnaire and interview schedule were analyzed with frequencies, percentages, analysis of variance, and means separation. Results indicated a high (73.78%) mean rate of application. Interstocking of catfish with tilapia was the most (77%) applied recommendation. The highest rate of application was in Bayelsa State with 80.93%, followed by Rivers State with 77.42% and, lastly, by Imo State with 63.07%. Bayelsa and Rivers State application rates varied significantly from that of Imo State. The study recommends a more intensive agricultural extension effort by the Project in Imo State.

Smart Evolutionary Algorithm for Static Economic Load Dispatch Optimization in a Thermal Generating Station

Abstract: The Economic Load Dispatch (ELD) problem is an optimization task with emphasis on how power generating companies (GENCOs) will be able to meet the power demands of the distribution companies (DISCOs) and electricity consumers, and at the same time minimize both under/over generation of electricity, and also minimize the operational costs of running the units in their various stations. This paper implemented a Smart Evolutionary Algorithm, which combines a standard Evolutionary Algorithm with a smart mutation operator that is applied to the Static ELD problem. It also investigated and analyzed three distinct variants of the smart mutation operator. The operator focused mutation on genes contributing mostly to cost of generation and penalty violations in the fitness function. Rather than using a generic off-the-shelf optimization package, the paper demonstrated a novel approach to solving certain kinds of real-world problems, contributing a method that have advanced the state of the art in solving a specific optimization problem in the area of economic load dispatch.

Two-edge strategic orientation approach: defensiveness and competitive aggressiveness on stakeholders’ value maximization

Abstract: The purpose of this paper was to examine empirically, the roles of defensiveness and competitive aggressiveness in the actualization of stakeholder’s value maximization. The study adopted a survey design and a quantitative methodology in its investigation, with data generated using structured questionnaire copies from 204 respondents within 48 manufacturing firms listed with the Manufacturers Association of Nigeria (MAN), Rivers/Bayelsa State Chapter. Results revealed significant relationships between defensiveness as well as competitive aggressiveness and two measures of stakeholder’s value maximization (social, economic and environment). It was therefore concluded that defensiveness and competitive aggressiveness play significant role in maximizing and sustaining the identified aspects of stakeholder’s value. Hence it was recommended that for manufacturing firms to satisfy their stakeholders better and have competitive advantage, they should adopt both defensiveness and competitive aggressiveness as strategic options which will help managers to satisfy its employee, community, government and customers’ needs over the long term because these options entail researching and developing products by scanning the environment to ascertain the needs of these stakeholders. Article visualizations:

Towards Cooperative Power Pooling for Heterogeneous Load Clusters

Abstract: In this paper, cooperative power management (CPM) for heterogeneous load clusters is presented. Load flow (LF) and continuation power flow (CPF) characterization are introduced to describe the behavior of the network in static form. The essence is to guide on size of generator to consider and to determine excess power remaining without collapsing the network after meeting satisfactory supply demand to the cooperative members. The considered entities of the proposed cooperative power pooling system (CPPS) include: (i) electricity consumer cooperatives, (ii) CPPS criteria (iii) load flow model iv) continuation power flow (CPF); (v) power dispatch model and costing (PDMC), (vi) consumer cooperative with pool of generators model, vii) consumer cooperative with purchase of central generator, (viii) Algorithm for the pool of generator and the consumer cooperative (with pool of generators) and willing to sell out excess power model (CWSPM). These are employed in modeling demand response needed to tackle price distribution of the network using metering system. Consequently, the system provides fairness on charges based on load consumed while managing the members effectively.