简介：Chinaisrichincoalbedmethane.Accordinglatestsurvey,coalbedmethanegasreserveswithaburyingdepthoffewerthan2000mamountto3600billibeingequalto45billiontonsofstandardcoalor35tonsofstandardoil.totheurymgonm3,billionNDRChasissuedthe11thFive-YearProgramforEx-ploitationandUtilizationofCoalBedMethaneinAugust.Itisplannedthattheproductionofmethanegaswillcomeupto10billionm3,andanindustrialsystemofexploitingand
简介：Thispapertriestodeterminetheeconomicaltypeofreinforcedconcretechimneystructurebasedonthesameeffectiveheightofchimney.Thesimulatedexperimentsofwindtunnelareperformedforthestudy,whichcomparemulti-tubechimneywithsingletubechimneybasedonthesamebuoyancyfluxofplume.Accordingtothecomparisonamongtheexperimentresultsandthepreviousstudyofplumerise,thepaperdefinessomefinalplumerisemodels.Finally,thepapergivesthecost-benefitanalysisaftermakingcostestimationfordifferenttypesofchimneystructureandrecommendstheeconomicalandreasonabletypeofchimneystructureinlightofthesameenvironmentalbenefits.
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