The Experts below are selected from a list of 6474 Experts worldwide ranked by ideXlab platform
Manal Al-balushi - One of the best experts on this subject based on the ideXlab platform.
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Drying of Limes in Oman Using Solar Tunnel Dryers
International Journal of Environmental Science and Development, 2013Co-Authors: M. A. Basunia, H. H. Al-handali, Manal Al-balushiAbstract:A solar tunnel dryer having 16 Meter long and 2 Meter Width was designed and constructed to dry about 300 kg of freshly harvested limes per batch. The nearly one-third area of the tunnel base was used as the solar collector and the remaining two-third area as a dryer. The drying temperature could be easily raised by some 5-300C above the ambient temperature inside the tunnel at an air velocity of approximately 0.15 (ms-1). The test was conducted with about 300 kg freshly harvested limes with initial moisture content of 86.0% (wet-basis) to analyze the performance of the dryer. The limes were dried to a final average moisture content of 10.0% (wet-basis) within 7 days (70 hours). The results indicated that the drying was faster in solar tunnel dryer ( 7 days) than the natural open air sun drying (> 3o days). The improvement in the quality of limes in terms of color, brightness and flavor was distinctly recognized
Emanuele Quaranta - One of the best experts on this subject based on the ideXlab platform.
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Performance Optimization of Overshot Water Wheels at High Rotational Speeds for Hydropower Applications
Journal of Hydraulic Engineering, 2020Co-Authors: Emanuele Quaranta, Roberto RevelliAbstract:AbstractOvershot water wheels are hydropower converters generally employed for head differences up to 6 m and maximum flow rates of 150−200 L/s per Meter Width. The maximum hydraulic efficiency (8...
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Stream water wheels as renewable energy supply in flowing water: Theoretical considerations, performance assessment and design recommendations
Energy for Sustainable Development, 2018Co-Authors: Emanuele QuarantaAbstract:Abstract Water wheels were the earliest hydraulic machines used in antiquity to convert water energy into mechanical one. Due to their simple installation, low maintenance costs, and thanks to the possibility to use local manpower and material for their construction, nowadays water wheels are again used as energy supply, especially in remote localities and emerging countries. In particular, stream water wheels are installed in flowing water where there are not head differences. The performance depends on the blockage ratio, so that they can be subdivided into three main categories: stream wheels in shallow subcritical flow, shallow supercritical flow and deep flow. In this paper, experimental, theoretical and numerical data on stream water wheels were systematically collected from literature and analyzed. Guidelines for their design were discussed focusing especially on wheel dimensions, supporting structures, blades and speed. More light on their hydraulic behavior was shed, adopting the previous classification for a better explanation and understanding. Results showed that in shallow water an head difference can be generated by the wheel, increasing the power output. In deep flow, accurate hydrodynamic floating/supporting structures allow the hydrostatic force of water to be exploited in addition to the kinetic energy of the flow. As a consequence, power output can improve from 0.5 to more than 10 kW per Meter Width, so that stream wheels can represent an attractive energy supply in zero head sites.
Mahgoub - One of the best experts on this subject based on the ideXlab platform.
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Drying of Fish Sardines in Oman Using Solar Tunnel Dryers
2011Co-Authors: Basunia, Ai-handali, Ai-balushi, Rahman, MahgoubAbstract:This paper deals with the design, construction and performance evaluation procedure of a solar tunnel dryer in drying fish. A 12 Meter long and 2 Meter Width half-circled tunnel was designed and constructed to dry about 50-100 kg of freshly harvested fishes per batch. The half of the tunnel base was used as the flat plate air heating solar collector and the remaining half as a dryer. The drying air was forced from the collector region (north side) to the drying region (south side) of the half circled tunnel where the product is to be dried. The drying temperature could be easily raised by some 5-30 ℃ above the ambient temperature inside the tunnel at an air velocity of approximately 0.2 m/sec. The test was conducted with 51.5 kg freshly harvested sardines (half-load) with initial moisture content of 66.5% (wet-basis) to analyze the performance of the dryer. The fishes were dried to a final average moisture content of 15.5% (wet-basis) within three days (30 hours). It was possible to reach the moisture content level for safe storage within less than three days (30 hrs) with solar tunnel dryer and 7 days in open air natural sun drying. The improvement in the quality of fishes in terms of color, brightness, flavor, and taste and food value was distinctly recognized.
Paul Russell - One of the best experts on this subject based on the ideXlab platform.
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Measurements of net cross-shore sediment flux at the timescale of individual swashes
2009Co-Authors: Chris Blenkinsopp, Gerd Masselink, Ian L. Turner, Paul RussellAbstract:This paper reports on a large scale field experiment designed to examine hydrodynamic and morphodynamic processes in the swash zone. The data obtained during this experiment have enabled some of the first estimates to be made of net cross-shore sediment flux driven by large numbers of individual swashes derived using high-frequency measurements of morphological change. The results suggest that individual waves regularly deposit or remove hundreds of kilograms of sand per Meter Width of beach, however these short term morphological changes tend to balance out over longer timescales ensuring that beaches remain relatively stable. Comparison of measured sediment fluxes with those predicted by an energetics approach highlight the difficulty of modelling swash zone sediment transport.
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FIELD MEASUREMENTS OF NET SEDIMENT FLUX FROM INDIVIDUAL SWASHES ON A SANDY BEACH
Proceedings of Coastal Dynamics 2009, 2009Co-Authors: Chris Blenkinsopp, Gerd Masselink, Ian L. Turner, Paul RussellAbstract:The shoreline along sandy beaches is located at a unique position on the earth’s surface where marine and terrestrial processes converge. The swash zone distinguishes the landward-most reach of wave action. Field observations from this shallow and highly energetic region reveal that individual waves regularly deposit or remove hundreds of kilograms of sand per Meter Width of beach. Such high rates of sand movement represent several centiMeters of bedlevel change and far exceed the underlying pace of beach evolution. Relatively large morphological changes caused by single swashes might suggest that very rapid beach erosion or accretion is a common occurrence. The contrasting reality shown by these new observations is that beaches generally exhibit a state of dynamic equilibrium.
Hitoshi Takii - One of the best experts on this subject based on the ideXlab platform.
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WINROLL Winder. Winding concepts and WINROLL winder.
JAPAN TAPPI JOURNAL, 2002Co-Authors: Hitoshi TakiiAbstract:Increasing the size of rolls of rotogravure, LWC and newsprint, increasing the speed of printing press, and evolving of paper grades and paper making processes require to match the capacity of winder to the paper machine operated with high speed.Based on these demands, minimizing manual operating and increasing operation productivity, Metso developed the completely new multi-station winder called “WINROLL”. There are many automated functions such as “splicing at unwinding stand”, “web threading”, “core handling” and “tail fastening”, which make one-man operation possible.The WINROLL winder is able to produce 10 ton and 4 Meter Width rolls by new technologies.
