Mechanical Engineering
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Mechanical Engineering
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Item Effects of Generating Plant Noise on Humans and Environment(International Journal of Engineering Trends and Technology (IJETT), 2016-05-26) Babawuya, .A.; Bori Ige; Bako, .M. D.; Yusuf, .S. A.; Jibrin, .A.; Elkanah, .A. J.; Mohammed, .A.Noise measurements were taken in the morning, afternoon, evening, and night to determine the extent of noise pollution all over the city. A calibrated sound level meter was used to measure the generating plant noise. The equivalent sound levels (Leq) were measured at 20 different locations, between 8 a.m and 10 p.m. High noise levels were observed throughout the town. The data obtained was analysed and the results then compared with world health organization standard. The noise equivalent level varied between 99.4 and 83.2 dBA. The results of the study established the fact that generator noise levels are more than the acceptable limit of 60 dBA, thatis the daytime government prescribed noise limit for residential and commercial areas. The reaction of the residents to generating plant noise was monitored with a total of 300 questionnaires. The results of the interview questionnaire revealed 97% of the people classified the noise in their street as very high while 3% says it is low. And also the respondents answered that noise bother them more in day and night while 11% of the respondents say it is only in the night only. The main outcomes of exposure to generating plant noise were loss of sleep, hearing loss, annoyance and disturbance.Item A STUDY OF THE EFFECT OF DEGRADATION ON INDUSTRIAL GAS TURBINE PERFORMANCE(Journal of Science, Technology, Mathematics and Education (JOSTMED), FUT Minna, 2016-03-15) Nasir, .A.; Usman, .S. A.; Mohammed, .A.; Muhammed, .S. N.; Bori IgeComponent degradation is a very common problem associated with operating industrial gas turbines. The major components so affected by this phenomenon are compressor, combustor and turbine blades. This paper studied the effect of degradation on gas turbine performance. The study involved the analyses of operating parameters effects for Siemens gas turbine engines model SGT5 – 2000E coded GT11 and GT21 in the power stations at Geregu power stations. The parameters considered were ambient temperature, exhaust temperature, combustion chamber pressure and turbine entry temperature, GT11 is degraded while GT21 is newly installed engine both in the same location at Geregu I and II power stations in Ajaokuta, Kogi State in the North central part of Nigeria.Simulations were carried out using Gas turb 11 simulation software, results of engine performance parameters were compared and it was revealed that due to component degradation, the turbine entry temperature (TET) increased to 1049.67oC, the fuel flow increased by 8.49% and power fell by 7.14%. Consequently, the cost of power loss is one hundred and eighty-seven million, one hundred and eleven thousand, seven hundred and fifty-three naira ninety-two kobo (₦187,111,753.92k) over a period of one year for the degraded gas turbine.Item Characterization and Management of Solid Waste Generated in Nasarawa LGA in Nasarawa State, Nigeria(Middle-East Journal of Scientific Research, 2016-01-18) Nasir, .A.; Kasimu, .U.; Bori Ige; Mohammed, .A.Solid wastes constitute a significant amount to environmental hazard in the society. The need to characterize solid wastes as an initial step to proffer solution to the problem of solid waste management cannot be over emphasized. In Nasarawa local government area (LGA) in Nasarawa state, the solid waste materials are characterized into six (6) different materials type which includes paper/cardboard, plastic food pack/plastic bottles, metal cans, food waste, polythene bags/polystyrene food pack and other combustible miscellaneous waste material. The waste characterization shows that Polythene bags/polystyrene food packs constitute the highest waste of 141.09 kg/day collected during the study period. This is followed by food waste with 130.37 kg/day. Plastic food pack/plastic bottles, metal cans, paper/cardboard and others has 64.64 kg/day, 59.39 kg/day, 53.51 kg/day and 29.15 kg/day respectively. The non-biodegradable wastes such as polythene bags/polystyrene food pack, plastic food pack/plastic bottles and metal cans constitute about 56 % (257 Kg/day) of the total waste collected during the study period. It is recommended that Nasarawa state waste management scheme should include the adoption of 3R’s methods scheme for reducing the biodegradable waste components and also employed for reducing the non-biodegradable waste components.Item Analysis of Exhaust Gas Emissions from Gasoline engine-powered passenger vehicles in Nigeria(International Journal of Engineering Trends and Technology (IJETT), 2016-04-22) Nasir, .A.; Bori Ige; Shiru, .B. S.; Mohammed, .A.Emissions from vehicles in developing country constitute a large percentage of global emissions. The study involved the analysis of exhaust emissions using a gas analyser. The vehicles studied are mini buses and private vehicles of different model of carswhich constitute about 80% of the vehicles on Nigeria roads. It was established that the main types of exhaust gases from the automobiles were CO2, NO2, CO, and O2. The highest emission of CO2 was found to be 413.13 mg/m3 in the 2007 Peugeot car model. The highest exhaust gas emission of NOx, O2 and CO was discovered in the 1998 Honda passenger car model and recorded as 40.23 mg/m3, 45.41mg/m3 and 192.43 mg/m3respectively. The study of emissions will spur further studies on more efficient combustor design aimed at minimizing emissions.Item Modeling the Energy Content of Municipal Solid Waste (A Case Study of Minna Metropolis)(African Journal of Renewable and Alternative Energy (AJRAE), 2019-07-11) Ibrahim, .M.; Babawuya, .I.; Enagi, .I.; Mohammed, .A.; Suleiman, .I.; Bori Ige; Garba, .M. U.Waste management has assumed importance due to environmental hazards and rapid depletion of the resources of almost all the minerals. Considering the bulk quantity which form the waste in municipal areas, its utilization is posing a challenge to the environment and our natural resources. A physical characterization was performed in 120kg of MSW sampled for one week. Also an ultimate analysis was carried out on 2kg sample of waste mixed thoroughly. The results of physical characterization show there are 30.58% of paper, 29.53% of plastic, 17.17% of food waste, 32.83% of polythene, 16.42% of metals and 18.58% of glass wastes respectively. Also the ultimate analysis shows that there are 36.53% of carbon. 10.09% of Nitrogen, 3.39% of Hydrogen, and 1.10% of Sulphur, 37.37% of ash content and 11.52% of oxygen content respectively. About 23,450kg of waste was open dumped by NISEPA trucks during the study period. A HHV of 5840659.35KJ/120kg was obtained, and it was also found that approximately 488MW of electricity could be generated from waste materials dumped at the landfill annually.