The Experts below are selected from a list of 69 Experts worldwide ranked by ideXlab platform
D J Afu - One of the best experts on this subject based on the ideXlab platform.
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development of an integrated dust collector and local exhaust ventilation system for controlling industrial mine dust
Advanced Materials Research, 2013Co-Authors: E O Ifelola, D J AfuAbstract:Dust control in an enclosed mine environment is a fundamental key to personnel safety for boosting personnel productivity and enhancing successful operation, hence the need to design a dust control equipment to meet this crucial requirement. A laboratory-scale local exhaust ventilating system for the control of airborne dust in an enclosed mine environment was designed and fabricated. The design was carried out by considering various design criteria required for a well-ventilated enclosed mine environment. Material selection of the components was done by taking into cognisance the physical characteristics of the targeted dust. The system designed was fabricated and then test-ran with dry dust laden air stream in order to determine its cleaning efficiency with respect to variation in Fan speed and dust grain size. It was observed that the cleaning efficiency of the machine was high at a higher Fan speed and low grain sizes. The cleaning efficiency ranged from (63.9-44.0)% for dust particle sizes ranging from (62.5-125) to (1000-2000) μm with a mean Fan Suction of 0.958Pa. Thus, with this system, improved cleaning of dry dust-laden enclosed mine workplace could be achieved with increased rate of Suction of smaller particle-sized dust.
M. De Paepe - One of the best experts on this subject based on the ideXlab platform.
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Design sensitivity analysis of using various in-tube condensation correlations for an air cooled condenser for ORCS
2015Co-Authors: Alihan Kaya, Marija Lazova, M. De PaepeAbstract:The study is related to the evaluation of using 19 condensation heat transfer correlations in an annular finned horizontal round tube V-shaped air-cooled condenser design problem for a representative low-temperature waste heat recovery Organic Rankine Cycle (ORC) case. The condensation is realized through cold air provided by the Fan Suction at a mass flow rate of 90,35 kg/s, whereas the working fluid mass flow rate is 7,8 kg/s. The considered condensation temperature is 40°C which corresponds to a saturation pressure of 1,17 bar. The ambient air is considered to be 15°C. The investigated working fluid is SES36. For a given set of geometrical constraints, an iterative condenser design model is implemented. All considered correlations are applied separately for the same boundary conditions. The design sensitivity on the overall heat transfer coefficient, total transferred heat, required Fan power, air- and refrigerant-side pressure drops is assessed. By those means, the engineering error margin of using different calculation tools in designing air-cooled condensers for ORC is reported.
Jiaping Liu - One of the best experts on this subject based on the ideXlab platform.
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Numerical Study on Flow and Thermal Characteristics in Flow Channel of Transpired Solar Collector
Environmental Science and Engineering, 2020Co-Authors: Qian Gao, Dengjia Wang, Yanfeng Liu, Yingying Wang, Yuan Liu, Jiaping LiuAbstract:At present, it is urgent to improve indoor air quality while improving indoor thermal environment in winter, which is the ultimate goal in the field of architectural environment. The transpired solar collector (TSC), a solar energy integration technology in buildings, was proposed, which usually consists of a heat collecting plate with infiltration holes, an air layer, an insulation wall, an air outlet, and other auxiliary devices. In this paper, the physical models of transpired solar collector were developed, and the model is simplified to facilitate the simulation calculation and be verified through experiments to improve the reliability of the simulation results. By using numerical simulation to carry on the comprehensive and multi-case study of transpired solar collector, such as solar radiation intensities, Fan Suction speeds, infiltration hole non-uniform distribution up and down, and infiltration hole diameters for flow and thermal characteristics in flow channel of transpired solar collector were analyzed. The results show that the height ratio has the most obvious influence on the flow and thermal characteristics in the air layer compared with other key design and operation parameters. The results can lay a foundation for the large-scale processing and application of transpired solar collector, which is instructive.
E O Ifelola - One of the best experts on this subject based on the ideXlab platform.
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development of an integrated dust collector and local exhaust ventilation system for controlling industrial mine dust
Advanced Materials Research, 2013Co-Authors: E O Ifelola, D J AfuAbstract:Dust control in an enclosed mine environment is a fundamental key to personnel safety for boosting personnel productivity and enhancing successful operation, hence the need to design a dust control equipment to meet this crucial requirement. A laboratory-scale local exhaust ventilating system for the control of airborne dust in an enclosed mine environment was designed and fabricated. The design was carried out by considering various design criteria required for a well-ventilated enclosed mine environment. Material selection of the components was done by taking into cognisance the physical characteristics of the targeted dust. The system designed was fabricated and then test-ran with dry dust laden air stream in order to determine its cleaning efficiency with respect to variation in Fan speed and dust grain size. It was observed that the cleaning efficiency of the machine was high at a higher Fan speed and low grain sizes. The cleaning efficiency ranged from (63.9-44.0)% for dust particle sizes ranging from (62.5-125) to (1000-2000) μm with a mean Fan Suction of 0.958Pa. Thus, with this system, improved cleaning of dry dust-laden enclosed mine workplace could be achieved with increased rate of Suction of smaller particle-sized dust.
Stefan Becker - One of the best experts on this subject based on the ideXlab platform.
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Investigation of the flow- and sound-field of a low-pressure axial Fan benchmark case using experimental and numerical methods
Journal of the Acoustical Society of America, 2017Co-Authors: Florian Zenger, Clemens Junger, Manfred Kaltenbacher, Stefan BeckerAbstract:An extension of a benchmark case for a low-pressure axial Fan is presented. The generic Fan is a typical Fan to be used in commercial applications. The Fan design procedure, as well as the experimental setups are described in detail. The numerical approach is based on a forward coupling between a flow simulation with ANSYS Fluent and an aeroacoustic source term and wave propagation computation with multiphysics research software CFS + +. Experimental and numerical data for aerodynamics and aeroacoustics are compared. This includes aerodynamic performance (volume flow rate, pressure rise and efficiency), fluid mechanical quantities on the Fan Suction and pressure side (velocity distribution and turbulent kinetic energy), wall pressure fluctuations in the gap region and acoustic spectra at various microphone positions. Finally, a comprehensive data base of an axial Fan was generated. Flow field properties at the Fan Suction and pressure side from the CFD simulation are in good agreement and spectra from the...
