IJRET: International Journal of Research in Engineering and Technology
eISSN: 2319-1163 | pISSN: 2321-7308
MODELING AND SIMULATION OF WIND-SOLAR HYBRID ENERGY SYSTEM FOR POWER SUPPLY TO FACULTY OF ENGINEERING TEACHING WORKSHOP IN UNIVERSITY OF MAIDUGURI A.B. Muhammad1*, G. M. Ngala2, S. Shodiya3, M. Shuwa4 1*, 2, 3
4
Department of Mechanical Engineering University of Maiduguri, Nigeria Centre for Entrepreneur and Enterprise Development, University of Maiduguri, Nigeria
Abstract Modeling and simulation of a PV-Wind hybrid electric power generation system is presented in this paper. The system generates power from wind and solar energy sources and also supplies power to the Faculty of Engineering Teaching Workshop, University of Maiduguri, Nigeria. Ten years meteorological data (wind speed and solar irradiation) for Maiduguri was collected from the National Metrological Agency (NIMET) and analyzed using statistical and simulation software (HOMER). Theoretical models for predicting the electrical power generation potential of the hybrid system was developed and the wind and solar energy potentials of the desired site was investigated and analyzed. According to the results obtained through the analysis, the site has abundant solar energy and wind energy potential, about 2-5MWh/m2/yr of electrical power can be generated by using the hybrid system under ideal condition. The electric load of the workshop obtained from the energy audit carried out was about 370kWh/day and the scaled peak load is 140kW. The modeling, simulations and design has been carried out using the HOMER software based on the promising findings of these two renewable energy resource potentials. The software generates the simulation results which are lists of feasible power supply systems have been and arranged in ascending order according to their net present cost.
Keywords: Hybrid, Homer, Modeling and Simulation ---------------------------------------------------------------------***--------------------------------------------------------------------1. INTRODUCTION Hybrid power system (HPS) is a power generating system that combines two or more modes of electricity generation together, usually using renewable technologies such as Solar Photovoltaic (PV) & Wind turbines (Hoque et al, 2012). Thus, a solar-wind power system takes advantage of wind and solar energy’s complementary characteristics. Wind and solar energy sources are the cheapest and available renewable energy and they best complement each other. Solar-wind HPS is made up of solar panels which produce electricity when solar radiation strikes the surface of the panel, and a wind turbine which starts to generates power when the turbine blades are turned by the kinetic energy of the wind. In this study, faculty of engineering teaching Workshop (FETW) University of Maiduguri is taken as case study area, it lies on the latitude 11˚ 51ʹ 0ʹʹ and longitude 13˚ 9ʹ 37ʹʹ. FETW is a unit in the Department of Mechanical Engineering, University of Maiduguri and is used for academic activities and its sources of energy are the national grid and a diesel engine generator. Maiduguri is a region where industrial activities are very low due to lack of electricity as such there is the need to put in place implementable energy solutions. The renewable energy sources of the region are not being exploited due partly to ignorance and partly to high cost of the conversion technologies involved (Awogbemi & Komolafe, 2011). The specific potentials of the region is characterized by the high intensity of solar radiation of 6.176kW/m2/day in Maiduguri and the average sunshine hour in the arid region is about 9
hours (Ngala et al., 2013). Wind resources is available at annual average speeds of about 4.0 m/s at the far northern region of the country, with an air density of 1.1 kg/m3 (Sambo, 2009). The main aim of this study is to model and simulate a wind-solar hybrid energy system for the workshop.
2. THEORETICAL DESIGN CALCULATIONS The design of renewable energy system starts with feasibility study, determining the available renewable energy resource of the site under study. A. Theoretical Background of solar energy Photovoltaic (PV) system also known commonly as solar cells, convert the energy from sunlight into DC electricity. Photovoltaic is known as the process between radiation absorbed and the electricity induced. Solar power is converted into the electric power by a common principle called photo electric effect. The solar cell array or panel consists of an appropriate number of solar cell modules connected in series or parallel based on the required current and voltage (Godson et al., 2013). According to Boneya and Bakele (2012), monthly average solar radiation is one of principal parameters used in HOMER software as input. 𝐻 = 𝐻𝑂 𝑎 + 𝑏
𝑛 𝑁
(1)
Where:
_______________________________________________________________________________________ Volume: 05 Issue: 05 | May-2016, Available @ http://ijret.esatjournals.org
229