http://repository.pauwes-cop.net/handle/1/67 2026-03-08T16:46:58Z 2026-03-08T16:46:58Z Jumare, Ismail Abubakar Bhandari, Ramchandra Zerga, Abdellatif http://repository.pauwes-cop.net/handle/1/194 2020-01-28T13:13:15Z 2018-01-01T00:00:00Z

Decentralized Grid-Connected Hybrid Renewable Energy System Design in Nigeria, Case Study of Zaria Municipal Jumare, Ismail Abubakar; Bhandari, Ramchandra; Zerga, Abdellatif Electricity shortage in Nigeria is very critical hence, need arises for joint, adequate and timely intervention especially by incorporating the available alternative energy sources. This paper is aimed at designing a Grid-Connected Hybrid Renewable Energy System for the case of Zaria, Nigeria. This was done by considering different scenarios starting from the conventional standalone diesel and gasoline generator systems to renewable off-grid hybrid system and finally to the proposed grid-connected renewable hybrid system design coupled with energy efficiency measures. The considered scenarios were addressed for a defined number of households and the clear benefits have been seen on implementing the proposed target as a transition from the conventional energy systems arising from grid unreliability and power shortages in the study region. In all the scenarios, physical components modelling, simulations and optimization were done using HOMER Pro Software, and finally the energy management aspect to the proposed grid-connected energy system scenario was addressed using ADVANCED EXCEL via a VISUAL BASIC Conditional Programming. The results obtained showed that the proposed scenario i.e. the grid-connected system design was the best of all the scenarios considered in terms of total NPC, LCOE, ghg emissions and pollutants. It ensures for example a total NPC and LCOE reduction from the off-grid hybrid renewable system scenario by 69%. Incorporating the energy efficiency measures to the proposed grid-connected scenario results in improved benefits hence an opportunity for a more rapid transition. Therefore, the proposed approach is the best to implement coupled with expansions for effective solution to energy deficit and climate change challenges in the country of study and the African continent at large.

2018-01-01T00:00:00Z Ali, Ahmed Hamza H. http://repository.pauwes-cop.net/handle/1/52 2020-01-28T13:13:15Z 2018-01-01T00:00:00Z

Experimental Study on Performance of Solar Thermal Driven Cooling System Versus a Hybrid Mechanical Compression Refrigeration-Solar Thermal Assisted System in Hot Areas Ali, Ahmed Hamza H. Refrigeration and air conditioning systems are essential requirements for human needs, and, this followed by an increasing demand for electric energy. The recent trend in research and development find such systems to be driven entirely or partiality by renewable energy. One goal of this study is to minimize the grid-based electrical power needed by the residential scale air conditioning system through either using full, driven or partiality solar thermal energy. The study main aim is to present the reduction in the electrical power consumption by the mechanical compression refrigeration system through integrating an intermediate solar thermal to raise the pressure of the refrigerant after the compressor and before the condenser and to compare this system performance with an entirely driven solar thermal cooling system under hot, arid areas. This is being done through design, constructing and operation of both systems and carrying out the performance measurements under Assiut city environmental conditions.

2018-01-01T00:00:00Z Tafirenyika, Bradley Manyuchi, Mercy M. http://repository.pauwes-cop.net/handle/1/33 2020-01-28T13:13:15Z 2018-01-01T00:00:00Z

Potential to Produce Biogas from Tannery Waste Tafirenyika, Bradley; Manyuchi, Mercy M. The demand for fuel has been rising exponentially as the population is increasing. This calls for a need for alternate sources of energy and clean technology to address global warming problems. Large scale production of tannery waste is associated with land pollution, air pollution and water pollution. Biogas and bio-fertilizer can be co-generated by bio-catalyzed anaerobic digestion of tannery waste and leather by-products. This relieves pressure on the use of electricity, natural petroleum fuels and the environment itself. The key aim of this project is to utilize and make use of tannery waste dumped by leather industries through an anaerobic digestion process to yield the highest biogas yield as possible. The main statement of the problem focuses on the unsuitable carbon- nitrogen ratio in the tannery biomass which cause frequent ammonia production which greatly inhibit the anaerobic digestion process. Therefore the solution of this problem can be achieved through mixing the tannery waste with a different organic biomass such as cow dug in order to provide the desired C/N ratio suitable for anaerobic digestion. This blending of two or more substrates is called anaerobic co-digestion and in this case its aim is to reduce the nitrogen proportion with respect to carbon in the substrate in order to reduce inhibition of biogas production. The major equipment to be designed for the process are the hydrolytic reactor to hydrolyze the organic matter into smaller units, the bio digester for fermentation and the distillation column for biogas purification.

2018-01-01T00:00:00Z Merah, Mohamed http://repository.pauwes-cop.net/handle/1/32 2020-01-28T13:13:15Z 2018-01-01T00:00:00Z

Simulation and comparison between conventional and interleaved Buck-boost converter for grid-connected PV system Merah, Mohamed This paper presents a mathematical modelling of buck boost converter used for grid-connected PV systems. It is related to the optimization of the first input stage of a grid tie inverter PV system. The interleaved buck-boost DC-DC converter is proposed to increase the performance of the entire system. The input current is shared between the inductors. As a result, the current ripples are reduced and a good reliability in power electronic systems is gained. The interleaved buck-boost converter is presented and compared in simulation.

2018-01-01T00:00:00Z