Global energy demand and its implications for Sub-Saharan Africa

Author(s):  
Andrew Emmanuel Okem
Buildings ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 642
Author(s):  
Mark Kyeredey Ansah ◽  
Xi Chen ◽  
Hongxing Yang

Reducing the lifecycle energy use of buildings with renewable energy applications has become critical given the urgent need to decarbonize the building sector. Multi-objective optimizations have been widely applied to reduce the operational energy use of buildings, but limited studies concern the embodied or whole lifecycle energy use. Consequently, there are issues such as sub-optimal design solutions and unclear correlation between embodied and operational energy in the current building energy assessment. To address these gaps, this study integrates a multi-objective optimization method with building energy simulation and lifecycle assessment (LCA) to explore the optimal configuration of different building envelopes from a lifecycle perspective. Major contributions of the study include the integrated optimization which reflects the dynamics of the whole lifecycle energy use. Insights from the study reveal the optimal configuration of PV and composite building façades for different regions in sub-Saharan Africa. The lifecycle energy use for the optimized building design resulted in 24.59, 33.33, and 36.93% energy savings in Ghana, Burkina Faso, and Nigeria, respectively. Additionally, PV power generation can efficiently cover over 90% of the total building energy demand. This study provides valuable insights for building designers in sub-Saharan Africa and similar areas that minimize lifecycle energy demand.


2020 ◽  
Author(s):  
Giacomo Falchetta ◽  
Nicolò Golinucci ◽  
Michel Noussan

<p>In sub-Saharan Africa (SSA) most people live on plant-dominated diets, with significantly lower levels of per-capita meat consumption than in any other region. Yet, economic development has nearly everywhere spurred a shift to dietary regimes with a greater consumption of meat, albeit with regional heterogeneity for meat-type and magnitude. A growing regional economy, changing cultural attitudes, and a steeply increasing population could thus push the regional demand upward in the coming decades, with significant depletion of regional and global natural resources and environmental repercussions. We study the historical association of the four main meat types with demand drivers in recently developed countries via seemingly unrelated regression (SUR) equation systems. Using the calibrated coefficients, trajectories of meat consumption in SSA to 2050 are projected relying on the SSP scenarios over GDP and population growth. Then, using a Leontiefian environmentally extended input-output (EEIO) framework exploiting the EXIOBASE3 database, we estimate the related energy, land, and water requirements, and the implied greenhouse gas (CO<sub>2</sub>, CH<sub>4</sub>, N<sub>2</sub>O) emissions. We calculate that if production to meet those consumption levels takes place in the continent – compared to the current situation – global greenhouse gas (GHG) emissions would grow by 230 Mt CO<sub>2</sub>e (4.4% of today’s global agriculture-related emissions), the land required for cropping and grazing would require additional 4.2 · 10<sup>6</sup> km<sup>2</sup> (more than half of the total arable land in SSA), total blue water consumption would rise by 10,300 Mm<sup>3</sup> (0.89% of the global total), and additional 1.2 EJ of energy (6% of today’s total primary energy demand in the region) would be required. Alternative scenarios where SSA is a net importer of final meat products are reported for comparison. The local policy and attitudes towards farming practices and dietary choices will have significant impact on both the regional environment and global GHG emissions.</p>


2021 ◽  
Vol 3 (2) ◽  
pp. 286-296
Author(s):  
Vanona Noelson Jean Christophe ◽  
◽  
Raminosoa Chrysostome ◽  
Modeste Kameni Nematchoua ◽  
◽  
...  

Energy demand varies depending on the location chosen for construction. The main objective of this research is to analyze the bioclimatic potential of different climatic zones in different regions of Madagascar. For this, this research assesses and compares the indoor air temperature, the energy requirement, the carbon emission and the relative humidity in a traditional building commonly found in cities in sub-Saharan Africa, which was designed to be placed in four cities unevenly distributed in four climatic zones of Madagascar. In order to achieve this goal, hourly meteorological data for the past thirty years has been analyzed for two seasons (dry season and rainy season). At the same time, the adaptive comfort model defined by ASHRAE 55 served as a reference for evaluating the different potentials of passive design. The results showed that by 2030 the need for energy is expected to increase globally in these different cities studied. Like other countries around the world, it is recommended that countries in Sub-Saharan Africa conduct more of this kind of energy. Study in order to establish a construction standard specific to this region of the world.


2021 ◽  
Vol 13 (7) ◽  
pp. 3974
Author(s):  
Stergios Emmanouil ◽  
Jason Philhower ◽  
Sophie Macdonald ◽  
Fahad Khan Khadim ◽  
Meijian Yang ◽  
...  

In view of Ethiopia’s significant renewable energy (RE) potential and the dynamic interactions among the components of the Water–Energy–Food (WEF) Nexus, we attempted to incorporate solar and small-scale hydropower into the optimal design of an environmentally friendly microgrid with the primary goal of ensuring the sustainability of irrigation water pumping, while taking advantage of existing infrastructure in various small administrative units (kebele). Any additional generated energy would be made available to the community for other needs, such as lighting and cooking, to support health and food security and improve the general quality of life. The novelty of the study stems from the utilization of in situ social data, retrieved during fieldwork interviews conducted in the kebele of interest, to ascertain the actual needs and habits of the local people. Based on these combined efforts, we were able to formulate a realistic energy demand plan for climatic conditions typical of Sub-Saharan Africa agricultural communities and analyze four different scenarios of the microgrid’s potential functionality and capital cost, given different tolerance levels of scheduled outages. We demonstrated that the RE-based microgrid would be socially and environmentally beneficial and its capital cost sensitive to the incorporation of individual or communal machines and appliances. Ultimately, the social impact investigation revealed the design would be welcomed by the local community, whose members already implement tailor-made solutions to support their agricultural activities. Finally, we argue that extended educational programs and unambiguous policies should be in place before any implementation to ensure the venture’s sustainability and functionality.


2021 ◽  
Vol 73 (05) ◽  
pp. 28-31
Author(s):  
Pat Davis Szymczak

Africa is on track to becoming the world’s most populous region by 2023 as growth in the continent’s population surpasses that of China and India; between 2020 and 2040, one in every two births will be African, according to the International Energy Agency (IEA). The problem—and the opportunity—is that three-quarters of those new global citizens living in sub-Saharan Africa will live without access to electricity and other energy-driven staples of the modern world. “More than half a billion people [will be] added to Africa’s urban population by 2040, much higher than the growth seen in China’s urban population in the two decades of China’s economic and energy boom,” IEA noted in its Africa Energy Outlook 2019. “Growing urban populations mean rapid growth in energy demand for industrial production, cooling, and mobility,” IEA analysts wrote. “The projected growth in oil demand is higher than that of China and second only to that of India as the size of the car fleet more than doubles (the bulk of which have low fuel efficiency) and liquefied petroleum gas (LPG) is increasingly used for clean cooking.” With regards to gas, Africa is on track to becoming the third-largest region to feed the growth in global gas demand over the next 20 years, the IEA said (Fig. 1). Africa accounted for 8.8% of the world’s oil production in 2019, according to the BP Statistical Review of World Energy 2020. Nigeria was Africa’s top oil producer at 2.2%; Algeria was next at 1.6%; then Angola, 1.5%; and Libya, 1.3%. BP economists calculated Africa contributed 6.0% to the world’s natural gas production in 2019. They ranked Algeria as the continent’s top gas producer at a global share of 2.2% followed by Egypt, 1.6%, and Nigeria, 1.2%. Africa’s hydrocarbon-producing nations have always depended on fossil fuel and mineral exports for the foreign exchange that feeds their economies. But as the continent’s population grows and its demographics become younger and more urban, Africa is revealing itself as a “barefoot shoemaker”—wealthy to the extreme in fossil fuels and renewables, but with three-quarters of its sub-Saharan population living without electricity. Africa’s R/P (reserves-to-production) ratio is about half that of the Middle East and a quarter of first-place South America. But it is worth asking if South America’s high R/P is not due to years of high-profile exploration, while Africa—with a west-coastal geology similar to South America’s east coast—is simply underexplored. The World Bank has declared 32 of the continent’s 48 nations to be in an energy crisis considering that their gross domestic product (GDP) growth is outpacing power generation by a factor of three to four times. Investment is vital to turning this situation around, and the most attractive investment opportunities pre-pandemic were found in Nigeria, Mozambique, Egypt, Mauritania, and Equatorial Guinea, according to the organizers of Africa Oil Week (AOW), an exploration and production (E&P) investment conference held annually for 27 years.


Energy Policy ◽  
2019 ◽  
Vol 127 ◽  
pp. 113-124 ◽  
Author(s):  
Benjamin Pillot ◽  
Marc Muselli ◽  
Philippe Poggi ◽  
João Batista Dias

2021 ◽  
Author(s):  
MJ Booysen ◽  
Chris Abraham ◽  
Arnold Rix ◽  
Innocent Ndibatya

Minibus taxi public transport is a seemingly chaotic phenomenon in the developing cities of the Global South with unique mobility and operational characteristics. Eventually this wide-spread fleet of minibus taxis will have to transition to electric vehicles. This paper examines the impact of this inevitable evolution on a city-wide scale in Kampala, Uganda. We present a generic simulation environment to assess the grid impact and charging opportunities, given the unique paratransit mobility patterns. We used floating car data to assess the energy requirements of electric minibus taxis, which will have a knock-on effect on the region's already fragile electrical grid. We used spatio-temporal and solar photovoltaic analyses to assess the informal and formal stops that would be needed for the taxis to recharge from solar PV in the region's abundant sunshine. The results showed energy demand from a median of 224 kWh/day to a maximum of 491 kWh/day, with a median charging potential (stationary time) across taxis of 8 h/day to 12 h/day. The potential for charging from solar PV was 0.24 kWh/m^2 to 0.52 kWh/m^2. Our simulator and results will allow traffic planners and grid operators to assess and plan for looming electric vehicle roll-outs to the most-used mode of transport in Africa.


2019 ◽  
Vol Volume 30 - 2019 - MADEV... ◽  
Author(s):  
J.M. Ngundam ◽  
G. Kenne ◽  
Eustace Mbaka Nfah

International audience Electricity access in remote areas of Sub-Saharan Africa is limited due to high costs of grid extension to areas characterised by low population and low energy densities. Photovoltaic hybrid systems can be computed using an energy balance equation involving one unknown. For hypothetical village with an average daily energy demand of 153.6 kWh/d, the monthly energy output of photovoltaic modules at Garoua, Cameroon, enabled the evaluation of feasible photovoltaic hybrid (PVHS) options. An option with a renewable energy fraction of 0.557 having lower initial investments is suggested for electrification of more remote villages in Sub-Saharan African countries which have high solar radiation levels. This option comprises a 23.56 kWp PV array, a 15 kWp PV inverter, a 25 kW bi-directional inverter, a battery bank of capacity 324.48 kWh and a 25 kW diesel generator with an operating time of 1309 h/yr or 3.59h/d. The size of the PV array determined is smaller compared to the sizes of PV arrays which have been evaluated in the range 30-45 kWp using HOMER software for medium villages in Senegal. L’access à l’éléctricité en Afrique Sub-saharienne est limité par le cout élevé d’extension des resaux electriques vers les zones isolées caracterisés par une faible densité de la population et une faible densité de consummation de l’energie electrique. Les systemes hyrides photovoltaiques peuvent étre evalués avec une equation energétique à un inconue. Pour un village hypothetique avec une demande énergétique quotidienne de 153.6 kWh/jr, les productions énergetique mensuelles des modules photovotaiques à Garoua, au Cameroun, ont permis l’evaluation des options photovoltatiques hybrides realisables. Une option avec une fraction d’énergie renouvelable de 0,557 ayant un investment initial inféreur est suggerée pour l’électrification de villages plus éloignés dans l’Afrique subsaharienne qui ont des niveaux élevés de rayonnement solaires. Cette option comprend un générateur photovotaique de 23,56 kWc, un onduleur photovoltaique de 15 kWc, un inverseur bidirectionnel de 25 kW, un groupe de batterie d’une capacité de 324.48 kWh, et un groupe electrogene diesel de 25 kW avec un temps de fonctionnement de 1309 h/an ou 3.59h/j. La taille du générateur photovoltaique determiné est inférieur à celle des générateurs photovoltaiques dans la plage allant de 30 à 45 kWc à l’aide du logiciel HOMER pour les villages moyenne du Senegal comptant 750 habitants.


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