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2014
Energy is very important for the development of any country in this world and Malawi is not exceptional. Malawi depends mainly on the Hydro Electric Power, fossil fuels and biomass on its energy sources for social economic and industrial activities. Due to increase in demand, Electricity Supply Corporation of Malawi (ESCOM) has more pressure to supply the power to increased number of industry and domestic use which lead to more frequent blackouts throughout the country. In this regard there is need for an alternative source of energy, and solar energy is the most common and easy to get. The main objective of this study is to assess the potential for solar energy generation over Malawi, results of which would lead to harnessing solar energy in the country. The monthly mean sunshine hours and solar radiation values for the period of 30 years from 13 sites were analyzed in this study. Monthly and seasonal variations of sunshine hours and solar radiation were determined. Long vi TABLE OF CONTENTS DECLARATION .
Solar Energy, 2006
created a map of solar radiation climate in Africa using clearness index for 62 sites. They established a solar climate class II located in Malawi and Madagascar. However, their analysis did not include any irradiation data from a site in Malawi. In this study, the solar radiation climate of Malawi has been studied using long-term global radiation data from a local site. The mean monthly (K tm) and seasonal (K ts) daily clearness indices for the site were computed. It is observed that K tm has two maxima in a year (K tm = 0.58 in May and K tm = 0.64 in September), in close conformity with findings of Diabaté et al. (2004). Other results are presented and discussed.
African Journal of Environmental Science and Technology, 2015
This paper presents the characterization of global solar radiation (GSR) for Malawi using NASA’s SSE model. The mean monthly daily GSR monthly variation in the three regions of Malawi has been investigated. It has been found that there is a general gradient in GSR in the north-south direction. This gradient correlates well with the variation of the clearness index in the same direction (r = 0.986). It has been observed that the GSR is characteristic of each region. Simple analytic polynomials have been proposed for estimating solar radiation in the traditional Northern, Central and Southern regions of Malawi. There is a strong agreement between the polynomials and the SSE model with R2 values of 0.988, 0.989 and 0.989 and root mean square errors of 0.061, 0.057 and 0.062 kWh/m2.day for the regions, respectively. Key words: Malawi, global solar radiation, solar climate, surface meteorology and solar energy (SSE) model.
2006
Just as with other Southern African Development Community (SADC) countries, Mozambique faces severe, interrelated problems of energy and environment linked, with massive consumption of fuel wood biomass. The conventional power grid provides less than 7% of the energy needs for the country's 17 million inhabitants, and about 83% of the energy consumed in the country comes from biomass. Renewable energy resources can play an important role in the process of development of the country. From the vast renewable energy resources available in the country, solar energy represents one of those with the highest potential. Thus, the evaluation of the potential of solar energy systems in small-scale applications suitable for villages is a strategically good starting point for promotion of sustainable rural development. One of the major impediments in carrying out such studies is the fact that the exact behaviour of solar energy resources throughout the country has not been well studied. In this paper a general characterisation of the global, diffuse and direct solar radiation fields in Mozambique is presented. The study is based on experimental data measured by the National Institute of Meteorology (INAM) in the period 1970-2000. For these analyses global, diffuse and direct solar radiation data from three stations along the coast line and three stations in the interior of the country have been used. The six stations were representative of the three main regions of the country, namely south, centre and north. Furthermore, sunshine hours data of one selected station was analysed.
Zambia is vastly endowed with a wide range of energy resources. Yet, to date, Zambia has not fully exploited its potential in solar energy utilisation for electricity generation due to various reasons such as lack of understanding of the distribution of solar energy potential in the country and limitation of access to solar energy resource information. This paper assess the solar energy distribution and potential in Zambia. Nine provinces with different geographical and climatic regions that makes up Zambia were assesed. The distribution of solar radiation within the country were assessed using spatial analysis in ArcGIS Software. The 22year period solar datasets were considered for assessment. These datasets were obtained from NASA Atmospheric Science Data Center using Surface Meteorology and Solar Energy. The analyzed results indicate that Zambia has approximately 20,442TWh/year technical solar energy potential and receives 2109.97kWh/m 2 of solar energy per year with 4403.12hours of sunshine. The country has 186,121km 2 available and suitable land area for RETs implementations. This study is important as it present an overview of the technical solar energy potential for Zambia which is vital for decision making, energy mix and sustainable deployment of solar energy technologies in the country
Energies
The feasibility and potential assessment (PA) of solar PV energy is one of the key factors in identifying the most promising areas for the installation of solar PV stations. It determines the useful energy generated in the given area. This paper assesses the solar energy distribution and PA in the North Shewa administration zone. Based on the data collected and analysis made, it is found that more than 80% of the North Shewa areas are suitable for the solar energy generation for off-grid and on-grid systems. Hence, the solar potential of the North Shewa zone completely fulfills the standards of sunshine, solar radiation, and temperature. That is, most of the areas have solar radiation of 5.2 kWh/m2, and daily sunshine is greater than 7 h. The maximum energy production is found in December in Shewa Robit, Mehal Meda, Eneware, Debre Berhan, Alem Ketema, and Sela Dengay with 175.35 kWh, 188.18 kWh, 180.78 kWh, 189.54 kWh, 175.78 kWh, and 189.63 kWh, respectively. This is a good opportu...
Journal of Sustainability Research
Water and energy are both major challenges in rural areas of developing countries, including in the sub-Saharan Africa Region. This study assessed water and energy needs, challenges, and costs in order to produce a body of knowledge and further explore ways in which the water-energy synergies could be utilised. A mixed-mode survey method consisting of questionnaires, semi-structured interviews, observations and focus group discussions involving participants in the rural areas of Chiradzulu District in Malawi was employed. The study findings show that water access is generally inadequate, caused by high population, low yield, disparity in the distribution of water sources, and non-functionality. Using the contingent valuation method, logistic regression showed the only predictor of willingness to pay for drinking water was income and the predictors to pay for irrigation water were occupation, age and household size. Sustainable energy access was also found lacking for cooking and basic energy services such as for lighting, mobile charging and for radios. Biomass remains the main source of cooking energy, whereas battery powered torches have replaced paraffin for lighting. Overall, the household survey results imply that there is need for more sustainable water and energy provision. To address both challenges, the study recommends solar PV water pumping systems which can be designed in such a way that they can be simultaneously used for providing basic energy services. Further research is needed to address cooking energy choices.
Solar Energy, 1996
This paper describes how data from a variety of sources are merged to present new countrywide maps of the solar energy distribution over Ethiopia. The spatial coverage of stations with radiation data was found to be unsatisfactory for the purpose of a countrywide solar energy assessment exercise. Therefore, radiation had to be predicted from sunshine hours by employing empirical models. Using data from seven stations in Ethiopia, linear and quadratic correlation relationships between monthly mean daily solar radiation and sunshine hours per day have been developed. These regional models show a distinct improvement over previously employed countrywide models. To produce a national solar-energy distribution profile, a spatial extension of the radiation/sunshine relationships had to be carried out. To do this, the intercepts (a) and slopes (b) of each of the seven linear regression equations and another six from previous studies, completed in neighbouring Sudan, Kenya and Yemen, were used to interpolate the corresponding values to areas between them. Subsequent to these procedures, 142 stations providing only sunshine data were assigned their "appropriate" a and b values to estimate the amount of solar radiation received, which was then used to produce annual and monthly solar radiation distribution maps for Ethiopia. The results show that in all regions solar energy is an abundant resource.
This study seeks to assess the potential of utilizing Concentrated Solar Power for electricity generation in Zimbabwe. Data from 26 meteorological stations which are widely distributed around the country was used to map the distribution of solar radiation. Geographic information systems were employed to locate sites with potential for installing concentrating solar power plants. Areas with good potential were identified by using the following assessment factors: direct normal irradiance (DNI), proximity to transmission lines and water bodies, flatness of the area and the vulnerability of vegetation and wild life. After considering all the assessment factors, a total area of 250000 km 2 was found to be suitable. If only 10% of the suitable land area is used and the technology with the least efficiency (8-10%) is adopted, about 71.4 GW can be generated. The projected power generation is about thirty times the current power demand of the country.
Smart Grid and Renewable Energy, 2022
Sahel is an African area with high solar potential. However, this potential is not uniform across the region. This paper examines the spatial distribution of the available solar potential by using six stations across the Sahel area. This comparative study was based on the analysis of in situ measurements in Dakar in Senegal, Niamey in Niger, Ouagadougou, Gaoua, Dori in Burkina Faso and N'Djamena in Chad. The results showed the presence of a good global solar potential with an average value of about 5.43 kWh/m 2 /day. The maxima of global potential are noted in the northern part in Niamey with a value of 6.24 kWh/m 2 /day while the minima are recorded in the south-eastern part in N'Djamena with an irradiation close to 4.71 kWh/m 2 /day. Then, the monthly evolution of this potential shows similar trends for all stations. Indeed, two maximums are observed during the year in Spring (March) and Autumn (October). However, for most of these stations, the minima of global potential are recorded in Winter (November, February) and during the rainy season (July, October). Moreover, the direct normal potential also shows seasonal trends for the two stations (Dakar, Niamey) where it was measured. The maxima of direct normal irradiation (DNI) are observed between February and May with a value of 5.5 kWh/m 2 /day in Dakar and in Niamey with a value around 5.32 kWh/m 2 /day between February and November.
International Journal of Renewable Energy Research, 2019
In the present scenario of world (a growing world population & developing countries), the increasing consumption of electricity controls the progress of different forms of energy (renewable or nonrenewable energy) use around the world. Fossil fuels are non-renewable sources, and accounted for 81 % of total energy demand in 2017. However, there are some disadvantages associated with their use such as environmental pollution, emissions of greenhouse gasses, and they are depleting at a faster rate. Therefore, researchers have to work hard in order to find an alternative (such as solar energy) way for fossil fuel to generate energy. A large number of investigations on the solar energy have been carried out by many researchers in order to improve the living conditions, to help reduce air pollution and to go green. The purpose of work is to explore the current status, challenges, recent efforts and future prospects of solar energy in different countries including Malaysia, Indonesia (Asia region), Nigeria (Africa region) and Colombia (South America).
Solar Energy, 1996
This paper describes how data from a variety of sources are merged to present new countrywide maps of the solar energy distribution over Ethiopia. The spatial coverage of stations with radiation data was found to be unsatisfactory for the purpose of a countrywide solar energy assessment exercise. Therefore, radiation had to be predicted from sunshine hours by employing empirical models. Using data from seven stations in Ethiopia, linear and quadratic correlation relationships between monthly mean daily solar radiation and sunshine hours per day have been developed. These regional models show a distinct improvement over previously employed countrywide models. To produce a national solar-energy distribution profile, a spatial extension of the radiation/sunshine relationships had to be carried out. To do this, the intercepts (a) and slopes (b) of each of the seven linear regression equations and another six from previous studies, completed in neighbouring Sudan, Kenya and Yemen, were used to interpolate the corresponding values to areas between them. Subsequent to these procedures, 142 stations providing only sunshine data were assigned their "appropriate" a and b values to estimate the amount of solar radiation received, which was then used to produce annual and monthly solar radiation distribution maps for Ethiopia. The results show that in all regions solar energy is an abundant resource.
2012
This report is written within the RENEW IS academy, this is a five year (2009-2014) research project investigating energy access and development cooperation in Eastern Africa. It is funded by the Dutch Ministry of Foreign Affairs (DGIS) and is a joint collaboration of IVM (Institute for Environmental Studies, VU University Amsterdam), ECN (Energy research Centre of the Netherlands) and the environment, water, climate and energy department of DGIS. Within this program I did an internship with SNV Netherlands Development Organization in Zimbabwe. SNV in partnership with International Labour Organization (ILO) is investing in value chain development for rural solar PV markets. The intervention seeks to reduce the high transaction costs for solar products and their maintenance in rural areas by approximately 70% through establishing local sales, after-sales and maintenance networks. This will be done by fostering business relations between youth in rural localities and solar companies in towns while creating an environment where financing products are available on the market for affordability of the solar systems and products. ILO would like to create meaningful selfemployment opportunities for 180 people between 15-35 years of age in 2013. SNV would like to increase access to renewable energy for rural communities in Zimbabwe (SNV & ILO, 2012). Collaboration between SNV and ILO started with this research to investigate whether there is a natural and economical potential for solar PV in rural areas of Zimbabwe. Does it make sense to invest in a training program for the stimulation of a market based solar energy market based on economical and natural factors? Earth science and economics This study is done within the master Earth science, specialization earth science and economics. This master aims to work within the tension of earth science and economics. Therefore this study will study both; economical feasibility of solar energy and natural potential of solar irradiation.
American Journal of Energy and Natural Resources
The use of photovoltaic solar energy is affected by variations in the availability of solar radiation, which creates stability in solar panels. In our case, the need arose to study the temporal variability of solar energy in the southern region of Mozambique. This was followed by a descriptive sequence, applying the analytical method for the classification of days and the analysis of the day’s variability of clear, cloudy and intermediate skies in the data from three regional stations. The results show that it was mostly on clear sky days (44.64%), enhancing the use of solar energy. Statistical analysis of the frequency density variability shows that days with intermediate skies have a similar behavior, however they present a smooth decrease, because for variation of clear sky index ∆Kt* in the interval [-2,2] it is higher. The values of Kt* vary between 0.3342–1.2764, the minimum is observed in the month of July and the maximum in December and the variations during the daily course...
Renewable energy sources are easily accessible and clean to the environment. Solar energy is one of the best forms of renewable energy, particularly for a country such as Botswana. Paradoxically, Botswana finds herself importing electricity and experiencing power cuts, yet she has abundant sunshine almost all-year round that could be converted to electric power. This paper seeks to investigate through literature search, the potential for Botswana to convert her copious solar radiation into solar energy. A comparison of different forms of renewable energy are made. Particular attention is drawn to the case of Australia which has experience in use of solar energy and has a similar climate to that of Botswana. Findings from literature search reveal that Botswana stands a great chance of using solar power to improve the livelihood of its people and businesses. Recommendations to policy makers and the private sector are that there is urgent need to put in place policies, regulations and frameworks to support solar generation and reduce reliance on electricity importation and coal production which is not sustainable. The authors propose a conceptual model to help policy makers in implementing solar energy projects in Botswana.
Renewable and Sustainable Energy Reviews
This paper presents an overview of the Malawi energy situation and the potential of renewable energy resources including solar, wind, biomass, hydro and geothermal. Despite a range of efforts by local and international stakeholders to increase access to modern energy sources in the country, 89 per cent of Malawi׳s energy is still sourced from traditional biomass mainly fuel wood. Only 8 per cent of the population in Malawi have access to electricity but installed capacity of electricity generation is lower than demand. This leads to load shedding by the electricity supplier; consequently electricity supply in Malawi is unreliable and micro and macroeconomic activities are significantly affected. Solar, non-traditional biomass (crop residues and forest residues not burnt on three stone fireplaces, and biogas), hydro, wind and geothermal are potential energy resources that could enhance Malawi׳s energy security. However, unreliable financing mechanisms for large scale energy projects; shortage of trained human resource; lack of coordination among local institutions; unclear regulation enforcement; and sometimes political governance impede sustainable delivery of energy projects. The Malawi energy policy targets and drivers are also discussed in the paper. Based on the prevailing energy situation, a PESTLE analysis is provided in this paper outlining a novel thinking for addressing the political (P), economic (E), social (S), technological (T), legal (L), and environmental (E) challenges that constrain the development of renewable energy technologies in Malawi.
2011
This paper describes recent work on the development of a wireless based remote monitoring system for renewable energy plants in Malawi. The main goal was to develop a cost effective data acquisition system that continuously presents remote energy yields and performance measures. A test bed comprising of a solar photovoltaic (PV) power plant has been set up at Malavi Primary School and a central management system at Malawi Polytechnic. The project output gives direct access to generated electric power at the rural site through the use of wireless sensor boards and text message (SMS) transmission over cellular network. The SMS recipient at the central site houses an intelligent management system based on FrontlineSMS for hosting SMSs and publishing remote measurement trends over the Internet. Preliminary experimental results reveal that the performance of renewable energy systems in remote rural sites can be evaluated efficiently at low cost.
Journal of Sustainable Development Studies, 2019
This paper aimed at developing a sustainable strategy for the transfer of solar photovoltaic (PV) technologies to the rural areas in Malawi. The paper evaluated two strategies used to transfer solar photovoltaic (PV) technologies to rural Malawi namely the centralised systems strategy and the decentralised systems strategy. More attention was paid to analysing the PV transfer strategies in terms of management, financing, community participation, skills transfer, and marketing systems. Questionnaires and interviews were used to collect the needed data. The study has revealed that the centralised systems strategy, which is based on solar villages, is unsustainable. On the other hand, the decentralised systems strategy, which promotes small-systems, has potential to be sustainable as long as the systems are not given out to the people as donations. Therefore, a new sustainable policy strategy, for the transfer of solar PV technologies to the rural areas in Malawi, named ‘the commercial...
Renewable Energy, 1994
A~tract-The Republic of Botswana in Southern Africa has one of the fastest growing economies in Africa. However, its remotely isolated rural areas pose problems to rural energy management and development because of (i) poor road links with the urban centres, and (ii) remoteness from the national electrical transmission grid. Development of renewable energy sources, therefore, has a vast potential in Botswana. Solar energy, with excellent sunshine of over 3300 hrs per year, is of paramount importance, the applications of which are already quite significant and are growing at a steady rate. Use of solar energy is incorporated in the National Energy Master Plan, and it has contributed to almost all aspects of development in rural as well as urban areas. They include solar water heating for domestic and commercial uses, solar desalination to provide potable water, passive solar buildings, photovoltaic devices for lighting, water pumping, refrigeration, communication and fence electrification. This paper reviews various applications of solar energy and their contribution to development in Botswana and discusses future prospects of solar energy in Botswana.
2011
This paper describes recent work on the development of a wireless based remote monitoring system for renewable energy plants in Malawi. The main goal was to develop a cost effective data acquisition system that continuously presents remote energy yields and performance measures. A test bed comprising of a solar photovoltaic (PV) power plant has been set up at Malavi Primary School and a central management system at Malawi Polytechnic. The project output gives direct access to generated electric power at the rural site through the use of wireless sensor boards and text message (SMS) transmission over cellular network. The SMS recipient at the central site houses an intelligent management system based on FrontlineSMS for hosting SMSs and publishing remote measurement trends over the Internet. Preliminary experimental results reveal that the performance of renewable energy systems in remote rural sites can be evaluated efficiently at low cost.
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