Assessment of Roof Tilt and Building Azimuth for Off-Grid Photovoltaic Power for Buildings in Metropolitan Lagos, Nigeria
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Keywords
Off-grid, Strategic Technological Assessment, photovoltaic, power generation, Roof tilt, building azimuth, new housing developments, policy intelligence
Abstract
The study determined optimum roof tilt and building azimuth for rooftop-based distributed photovoltaic (PV) energy generation in Ikeja, Lagos State, Nigeria as strategic technological input to alternative power generation and new housing development in Metropolitan Lagos. The energy planning & foresight analysis methodology was used. The data were obtained via literature, Global Positioning System (GPS) systems, energy models and site visits; and comprised manual and satellite imagery, dimensions, roof angles and coordinates of the building structures in the study area (Rows between 0 – 60o, Columns between 0 – 180o; System sizes: 533 kW, 110 kW and 0.547 kW). The results showed solar array yield varied from 768,944 kWh per annum for a 500 kVA system to 780 kWh per annum for a 500 VA system. A five tier rooftop generation template of 245 MWp was consequently developed. Optimal roof tilt and building azimuth angles for the systems were estimated to be 5o and 180o respectively though combinations of azimuth and tilt angles not exceeding 30o tilt and 90o azimuth gave acceptable yields. The study concluded that the optimum roof tilt and building azimuth for rooftop-based distributed photovoltaic (PV) energy generation in the study area were strategic policy intelligence inputs for the renewable power generation and new housing development programmes of the Federal and Lagos State Governments.
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Babatunde Olaleye Salu, African Regional Centre for Space Science and Technology Education, National Space Research and Development Agency, Abuja
Babatunde Olaleye Salu (PhD) is Assistant Director (Research) at the African Regional Centre for Space Science and Technology Education, National Space Research and Development Agency, Abuja. The Regional Centre is located at the Obafemi Awolowo University, Ile-Ife, Nigeria. He studied electronic and electrical engineering, telecommunications engineering, and technology management at the Obafemi Awolowo University, Ile-Ife. He earned his PhD in Technology Management. A Registered Engineer, Dr. Salu is a Specialist in Science Policy, Space Applications and Systems Engineering, and Renewable Energy Systems.
Ibikunle Olalekan Ogundari, African Institute for Science Policy and Innovation, Obafemi Awolowo University, Ile-Ife
Ibikunle Olalekan Ogundari (PhD) is a Senior Research Fellow at the African Institute for Science Policy and Innovation (AISPI), Obafemi Awolowo University, Ile-Ife, Nigeria. He studied chemical engineering, financial management, and technology management at the Obafemi Awolowo University, Ile-Ife. He earned his PhD in Technology Management. A certified Safety Professional and Registered Engineer, Dr. Ogundari is a Specialist in Science Policy and Development Planning (energy/environment policy and management, critical infrastructure planning, and engineering/industrial projects analysis and management).
Samuel Igbokwe Anih, African Regional Centre for Space Science and Technology Education, National Space Research and Development Agency, Abuja
Dr. Samuel ANIH earned an MSc from the International Space University (ISU), Strasbourg, France and later had a graduate fellowship at NASA, Ames, Moffet Field, California, USA. He has a PhD from University of Cape Town. He has more than 15 years working experience as a Scientific Officer at the African Regional Centre for Space Science and Technology Education in English (ARCSTTE-E), National Space Research and Development Agency, a United Nations affiliated Centre. Dr. Anih is passionate about STEAM, space science & technology, most especially the future of crewed space missions beyond low Earth orbit, sustainability, planetary protection, and safe safety. He is helping build a new generation of space explorers and leaders
John-Felix Kayode Akinbami, Centre for Energy Research and Development (CERD), Obafemi Awolowo University, Ile-Ife
John-Felix Kayode Akinbami (PhD) is Research Professor at the Centre for Energy Research and Development (CERD), Obafemi Awolowo University, Ile-Ife. He holds BSc (Engineering Physics), MSc (Materials Engineering) and PhD (Technology Management) from the Obafemi Awolowo University, Ile-Ife. He was also a resource person/consultant on various study projects for both national and international organizations including European Union, African Development Bank, World Bank, Nigeria National Planning Commission, Energy Commission of Nigeria, Canadian International Development Agency (CIDA), and United Nations Industrial Development Organization (UNIDO). He has published extensively in reputable local and international journals in the areas of Sustainable Development and Climate Change, Electricity Sector Reform, Energy and Building, Energy Policy and Analysis, and Energy & Environmental Management.