Richard Opoku

Richard Opoku
Kwame Nkrumah University Of Science and Technology | KNUST · Department of Mechanical Engineering

PhD

About

37
Publications
16,008
Reads
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297
Citations
Citations since 2017
31 Research Items
292 Citations
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2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
Additional affiliations
August 2012 - present
Kwame Nkrumah University Of Science and Technology Kumasi-Ghana
Position
  • Consultant
Description
  • Researcher in thermal science and energy systems. Consultant in Sustainable Energy. Have rendered a number of consultancy services to organizations including Ghana Energy Commission, UNDP, UN Foundation, Royal Society-UK, NORAD-Norway, etc.
Education
August 2008 - July 2012
North Carolina Agricultural and Technical State University
Field of study
  • Thermal Science & Energy Systems Engineering

Publications

Publications (37)
Article
In this study, the aerodynamic performance characteristics of three new EYO-Series low Reynolds number (Re) airfoils were tested at Re = 100,000 to 500,000, which are typical range of Re numbers encountered by airfoils of small wind turbine blades. The results generally demonstrated aerodynamic performance improvements of all three airfoils with in...
Article
Full-text available
The aviation industry is responsible for 12% of transport-related GHG emissions and 2–3% of the global GHG emissions, thus raising concerns for sustainable alternatives such as aviation biofuels. This study sought to analyze the potential of producing aviation fuel from rubber seed oil. Rubber seed oil (RSO) was extracted and the physicochemical pr...
Article
Full-text available
Building load varies continuously throughout the year, causing heat pumps to operate at part load. At such situations, the capacity of the heat pump needs to be controlled to meet the building load. The use of variable speed compressors to control the capacity of heat pumps is found to be the most energy-efficient. However, the efficient control of...
Article
Full-text available
Global level improvement of resource use efficiency in agro-ecosystems has always been the target of experts who are keen on reducing the environmental impact emanating from agriculture. To this end, energy audit analysis in agro-ecosystems to determine the energy use at the various subsectors and levels of the agricultural sector, including poultr...
Article
Full-text available
Many households in sub-Saharan Africa (SSA) depend on wood-fuel and biomass for cooking, with associated health and negative environmental impacts. Indoor air pollution from these traditional cooking technologies and practices lead to a number of deaths each year. Clean and smokeless cooking technologies are necessary to minimize respiratory relate...
Article
Full-text available
In this paper, studies have been conducted on the performance of solar PV modules with integration of four different thermal management (cooling) techniques, namely, perforated-ribs-heat-sink under natural convection (PRNC), phase change materials (PCM), galvanized duct with forced convection (GDFC), and ducted fins under forced convection (FDFC)....
Article
The aim of this special issue is therefore to understand the cutting-edge research and technologies being implemented in developing countries to achieve clean, affordable and sustainable energy for the built environment. In addition, efficient technologies that deliver effective thermal cooling of buildings in a sustainable manner to enhance signif...
Article
Full-text available
In hot-humid climates, particularly in sub-Saharan Africa (SSA), ambient temperatures and relative humidity are as high as 35 °C and 84%, respectively, requiring the use of mechanical cooling systems for indoor thermal comfort. Split-type vapour-compression air-conditioners (SVAC) are mainly used for space cooling in SSA and consume 60-80% of total...
Article
Full-text available
Optimizing electricity consumption to minimize wastage and reduce cost is a major challenge in many industries. This is because, in many cases, the effect of the independent variables contributing to the total electricity consumption and cost are latent. The purpose of this study is to apply numerical techniques to identify and optimize these indep...
Article
The performance of solar PV panels is affected by the module temperature. Controlling the PV module temperature to optimize performance is of interest to researchers and project developers. In this paper, studies have been conducted on the performance of solar PV modules with integration of four different thermal management (cooling) techniques, na...
Article
This case study investigates the total cost of ownership (TCO) of four plug-in electric vehicles (PEV) compared with an internal combustion engine vehicle (ICEV) in Ghana over 20 years. The TCO model incorporated the manufacturer’s suggested retail price (MSRP), tax, fuel cost, charging cost, maintenance cost, social cost, and residual value includ...
Article
Full-text available
This research presents a study on the heat transfer coefficient for an unglazed solar plate collector in an unsteady humid outdoor environment. The purpose for undertaking this research is to investigate the correlation between the heat transfer coefficient and air speed and also verify whether heat transfer from unglazed solar thermal collectors u...
Article
In line with government efforts to increase renewable energy in the energy generation mix to 10 percent by the year 2030 and to promote cleaner production in the power sector, ambitious efforts are being made to promote the implementation of utility-scale solar PV plants with ample policy backing. However, performance information is not readily ava...
Article
Full-text available
In engineering, ceramic liners are used as heat retention, insulation, and wear-resistant components for industrial and domestic applications. However, due to lack of production standards, particularly under small industrial operations, there is variation in liner-hole diameter and inter-hole spacing of liners used in clean biomass stoves. This stu...
Article
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In this study, interviewer-based questionnaires of 67 variables were administered to local fabricators and end-users of single-pot biomass stoves (SPBS) in Ghana. Additionally, two randomly selected traditional and improved SPBS were lab-tested using standard performance metrics. From the study, the relationship between fabricators and end-users wa...
Article
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Energy management through waste heat recovery can result in significant savings in energy costs in industries. In this study, the heat recovery potential of hot air from the heat exchangers of two industrial air-compressors was assessed for process heating at a cocoa processing company, using a novel staggered tube cross-flow heat exchanger (STC-HX...
Article
Full-text available
Purpose The use of air-conditioners (ACs) is on the increase in the developing world, with exacerbating compounding effect on carbon footprints. With this development, there is the expectation that developing countries would begin to appreciate and understand occupant behaviours in the use of ACs towards combating climate change, especially as buil...
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Petroleum activities like production, transportation and storage have placed Ghanaian waters among zones negatively impacted by human activities. These places are occupied by human occupations and its associated risks. Oil pollution in the environment affects biota and degrades human health. Predictive and descriptive tools have made the assessment...
Article
Full-text available
Coconut husks with the shells attached are potential bioenergy resources for fuel-constrained communities in Ghana. In spite of their energy potential, coconut husks and shells are thrown away or burned raw resulting in poor sanitation and environmental pollution. This study focuses on quantifying the waste proportions, calorific values and polluta...
Article
Full-text available
In this work, studies have been conducted on heat transfer performance of both smooth and modified wicking surfaces in a spray cooling experiment for high heat flux applications. The heat transfer performance of the two surfaces in terms of critical heat flux (CHF) and heat transfer coefficient (HTC) were determined in an experiment using a two-pha...
Article
Full-text available
Over 600 million people living in sub-Saharan Africa do not have access to electricity. Modern healthcare services, including vaccine refrigeration, which require electricity are therefore lacking in such energy-deprived communities. In this work, analysis has been conducted on how electricity access can help improve healthcare service delivery and...
Article
Full-text available
Increasing effect of climate change coupled with global warming has necessitated the need for mechanical cooling in buildings to provide indoor thermal comfort. Many countries in tropical climates, particularly in sub-Saharan Africa, use sandcrete blocks for constructing building envelopes which have relatively high thermal conductivity. This leads...
Article
Full-text available
Small wind turbine power generation systems have the potential to meet the electricity demand of the residential sector in developing countries. However, due to their exposure to low Reynolds number (Re) flow conditions and associated problems, specific airfoils are required for the design of their blades. In this research, XFOIL was used to develo...
Article
Full-text available
High electricity consumption and corresponding cost in public tertiary institutions in many developing countries is a major challenge to their respective governments. Low efficiency electrical appliances are common in these institutions. In this work, studies have been conducted on sustainable energy efficiency measures and solar energy to reduce e...
Article
Adoption of higher energy efficiency for electrical appliances by consumers in Sub-Saharan Africa (SSA) is challenged with a number of barriers despite its long term energy savings and economic benefits. Inefficient electrical appliances continue to flood the markets of most SSA countries with just a few of the counties having resolute energy effic...
Article
Full-text available
Available data and market surveys conducted in Ghana have shown that 60–80% of electricity consumed in offices of public and commercial buildings is used to run air-conditioners to provide indoor thermal comfort for productive office work. Electricity consumptions of these air-conditioners are relatively high and are in the range of 3000–5400 kWh/y...
Article
The study applies a data-driven statistical tool called Probit Econometric Model to household data to explain the factors that influence the choice of road transport modes in Ghana. The data used for the study was extracted from the 7th round of the Ghana Living Standards Survey. Core living standard indicator variables employed include travel choi...
Article
A reliable and energy efficient approach of providing refrigeration needs is a major challenge in most developing countries, particularly sub-Saharan Africa. In this study, a comparative techno-economic assessment of a converted direct current refrigerator and a conventional alternating current refrigerator both powered by solar photovoltaic system...
Article
Full-text available
Renewable energy technologies offer many advantages in sub-Saharan Africa, but widespread deployment will require strong endogenous innovation capabilities. Universities in general and doctoral research in particular play a key role in tailoring technologies to local contexts and equipping future educators, policymakers and entrepreneurs with relev...
Chapter
The goal of this paper is to provide the framework for the implementation of sustainable Rural Cold Storage (RCS) systems for farm produce in agro-based rural communities in developing countries. RCS, a post–harvest technology system for farm produce, is an appropriate technology for marginalized rural communities in developing countries that helps...
Conference Paper
Fluid droplet interaction/dynamics on modified surfaces is very pertinent in understanding the heat transfer mechanism associated with evaporative cooling of such surfaces. In the present paper, wicking grooves experimentation in enhancing Heat Transfer Coefficients (HTC) in spray cooling is carried out. Cross and unidirectional grooves were studie...
Article
Buoyancy driven flow over a vertically heated flat plate ensues due to fluid density gradient in a gravitational field caused by density gradients due to temperature effects. In this configuration when the density gradient is orthogonal to the gravitational vector, any density gradient results into immediate flow. Buoyancy-driven convection over a...

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Projects (3)
Project
Ghana has started production of petroleum oil in commercial quantity and it is offshore production. This poses danger to marine and coaster environment in case of an accident resulting into major oil spill. This research seek to provide a simulation package that will help to mitigate the impact of damage and also provide guidance in managing such situation