Heat transfer process and fluid flow in a solar chimney used for natural ventilation are investigated numerically the present work. Solar was tested by selecting different positions of absorber namely: at back side, front middle air gap. CFD analysis based on finite volume method is to predict thermal performance, two dimensional under unsteady state condition, identify effect parameters such a...

The present work involves a new and novel upgrading design to the classical solar chimney power plant (SCPP) structure. SCPP was modified by adding co-centric secondary external structure enhance energy production. In improved design, named double-chimney (SDCPP), internal chimney, operates like traditional produce electricity during daytime whereas as 10 cooling towers (CT) in series. Each CT ...

Despite 200 years of efforts to regulate safety in this occupation, chimney sweeps have increased mortality from cancer, ischaemic heart disease, and respiratory disease. Mortality and incidence of cancer were examined in a cohort of 5542 Swedish chimney sweeps employed through their national trade union at any time between 1918 and 1980. Previous studies of this cohort found increased risks of...

2011;40:858–68. [15] Zipfel B, Buz S, Redlin M, Hullmeine D, Hammerschmidt R, Hetzer R. Spinal cord ischemia after thoracic stent-grafting: causes apart from intercostal artery coverage. Ann Thorac Surg 2013;96:31–8. [16] Feezor RJ, Martin TD, Hess PJ Jr, Daniels MJ, Beaver TM, Klodell CT et al. Extent of aortic coverage and incidence of spinal cord ischemia after thoracic endovascular aneurysm...

The height of mechanical mixing layer is one of the parameter of the safety analysis report of any industrial (nuclear) facility due to its relation to the dispersion factor of pollutants. It can provide information about lower atmospheric dispersion, which is usually used to study the pollutants released from nuclear facility, risk analysis and emergency planning. Mixing layer height is diffic...