ABSTRACT Privacy and security are major essential human needs in various homes, offices e.t.c. Accessibility to adequate, durable, fashionable and affordable windows in our different buildings has been a problem to the society. Ability to have access to window of good quality and high durability of a price affordable to an average Nigerian has been a problem. This project here aims at production of a durable aluminium window. The aluminium window was subjected to different test, it ...
Abstract: Steel machining waste known as chips is a kind of waste that can be returned to the process of raw material for steel fabrication or else be traded as co-product of other industrial activities. The reuse of this product is of great importance owing to the economic and environmental aspects. This work investigates the effect of steel machining chips as additive on the properties of clay. The physical properties of the clay and steel machining chips composite were determined. The c...
This study evaluated the exergy analysis of the mechanical forced draft counter flow of the Port Harcourt Refinery cooling towers. The exergy analysis was carried out using the exergy destruction method. The results of the investigation and optimization show that the exergy destruction increases with the increases in mass flow rates of the cooling water, makeup water, and Air. Also, exergy destruction decreases with the decreases in Humidity Ratio, Heat sink Temperature, and Relative Humi...
The capability of carbon nanotubes (CNTs) in efficient transporting of drug molecules into the biological cells has been the focus of attention of various scientific disciplines during the past decade. From applied mechanics points of view, translocation of a nanoparticle inside the pore of a CNT would result in vibrations. The true understanding of the interactive forces between the moving nanoparticle and the inner surface of the CNT is a vital step in factual realization of such vibrations...
Abstract Murmu et al. [23] recently presented a nonlocal model for the transverse vibration of simply supported graphene sheets in the presence of a unidirectional in-plane magnetic field. Further studies showed that the majority of Lorentz's force components were improperly provided and led to invalid governing equations. To remove such deficiencies, the most general form of Lorentz's force components is carefully extracted in the present work. The nonlocal equations of motion of the problem...
ABSTRACT Cavitation in a centrifugal pump has a significant effect on pump performance. Cavitation degrades the performance of a pump, resulting in a fluctuating flow rate and discharge pressure, that reduces pumps efficiency and the operating life of the pump, In this research the effects of cavitation on pump performance was studied on the power required ,efficiency , volume flow rate ,and the head , using a 3-D simulation by ANSYS (fluent flow) software for two phase flow (the water and i...
ABSTRACT Micro hydropower generated electricity can function as an effective tool for rural development. One of the barriers to smooth implementation of community/village micro hydropower schemes in the country is lack of appropriate hydraulic turbines, thus making the site specific costs of micro hydropower rather high, hence not easily affordable by the rural communities. The purpose of the study was to investigate the use of a vehicle live axle-propeller shaft system to replace conventiona...
ABSTRACT Transient analysis and performance prediction of passive cooling of buildings using long wave nocturnal radiation in Owerri, Nigeria are presented. Owerri is a typical urban area in southeastern Nigeria lying between latitude 5° 4' and 6° 3' N and longitude 6° 15'and 7° 34' E. The system modeled consists of the room of a building with a radiator panel attached to its roof, water storage tank located inside the room, pump to circulate water through the radiator panel at night and...
ABSTRACT Bio-fuels (Biodiesel and Bio-ethanol fuels) are synthesized from various Nigerian crops (palm(Elaeis Guineensis) wine, raffia(Raffia Vinefera) trunk, sugar cane(Saccharum L), physic nut seed (Jatropha Curcas), castor bean seed(Ricinus Communis), sandbox seed (Hura Crepitans) and African bush mango nut (Dika Nut) (Irvingia Gabonensis)) to serve as alternative fuels for internal combustion engines. The direct base-catalyzed trans-esterification process is employed in the biodiesel pro...
ABSTRACT Experimental investigation of anaerobic digestion of the organic fraction of municipal solid waste (MSW) in an upflow bioreactor with central substrate dispenser (UBCSD) is presented. The UBCSD consists of two similar size bioreactors joined by a central substrate dispenser (CSD). The UBCSD is a component of an integrated system of bioreactors also containing the upflow anaerobic sludge blanket (UASB) reactor and the continuous stirred tank reactor (CSTR), assembled systematically t...
ABSTRACT The Energy - Exergy based performance analysis of the Solid Adsorption Solar Refrigerator is presented. The system comprises the collector/generator/adsorber, the condenser and the evaporator. It utilizes activated carbon/methanol as its adsorbent/adsorbate working combination. The exergy performance analysis of this refrigerator involves detailed assessment of all the following sub-processes that make up the refrigeration cycle, which are isosteric heat-up phase, desorption phase, ...
ABSTRACT This thesis examines the development of a gas propellant rocket motor using cheap local materials. The fabrication of the prototype rocket engine was achieved by using machine tools like the lathe and drilling machines. The internal radius around the nozzle throat area was made without using any special tools for curves. The engine was tested twice and readings or data taken for pressure and temperature. Two thermocouples were damaged because the temperature exceeded their temperatu...
Abstract Design of a Robust Electronic Internal Temperature Controller for Petroleum Distillation is presented in this Thesis. During unstable weather conditions, there is a noticeable drop in the distillation internal column temperature. An extreme and frustrating case of this occurs during rainfall and at night when the fractional distillation column external temperature drops, greatly affecting the internal. Consequently, it becomes difficult to maintain a stable and optimum internal temp...
Abstract The design, construction and performance test of a parabolic solar cooker for domestic use are presented. The simple experimental parabolic solar cooker, made of locally available materials, consists of a parabolic dish of thickness 0.3mm, adjustable mechanism, pot, pot holder, base support and a reflecting glass surface. The concave surface of the dish was lagged with reflective glasses which serve as a reflecting surface. Commercially available (3mm) thick glass is used as glazing...
ABSTRACT A comparative analysis of renewable energy sources for power generation in Nigeria is presented. The three renewable energy resources of solar radiation, wind energy and hydro power were investigated for six locations (Northwest, Northeasth, North-central, Southwest, Southeast and South-south) representing the six geo-political zones of Nigeria. The Hargreaves and Samani model was used to investigate the solar energy potential of the study locations of Sokoto, Maiduguri, Makurdi, Ib...