Wind Environment and Loading Mitigation Effects on Coastal Enclosed Coal Yards with Porous Gables

Abstract

In order to prevent dust emission, coastal coal yards are enclosed by coal sheds. The dust suppression rate increases as the closure of the coal shed by sacrificing the ventilation rate. Adopting porous gables may provide a balance between natural ventilation and dust suppression as well as mitigate the aerodynamic loading effect. Through wind tunnel tests and numerical simulation, the present research take an practical coastal power plant coal yard as an example to illustrate the natural ventilation, dust suppression and aerodynamic loading mitigation effect quantitatively. The results have shown that, with a favourable gable prositiy of 30%, the natural ventialtion rate can be ehanced from 0.7 to over 2.0 times/hour compared with solid gables. The dust supression could be increased from 56% up to 80% compared with open gables. The unfavorable extremum aerodynamic suction coefficients on the central area and edges of roof are reduced by 20% and 70% respectively. The results provide a supportive evident that adopting prorous windbreak gables is a environemntal friendly and economic construction scheme for coastal enclosed coal yards.