篮球比分

篮球比分NINHAO,HUNANOULIDEHUANRESHIYEYOUXIANGONGSIWANGZHANHUANYINGNIN!

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广东广西地区如何选择欧力德食品级板式热交换器型号?

2019-10-11

篮球比分HUNANOULIDEHUANRESHIYEDESHIPINJIBANSHIHUANREQISHIYIZHONGXINXINGDEJIENENGREJIAOHUANZHUANGZHI,JUYOUCHUANREXIAOGUOGAO、JIEGOUJINCOU、ZHANDIMIANJIXIAO、 CAOZUOJIANBIAN,QINGXI、CHAIXIE、WEIHUFANGBIAN,RONGYIGAIBIANHUANREMIANJIHUOLIUCHENGZUHEDENGYOUDIAN。BANPIANRENZIXINGBOWEN,JIEZHILIUDONGXINGCHENGTUANLIUZHUANGTAI,ZHANJIAOSHIMIFENGDIANPIAN。CHUANREXISHUNENGGAODA2000~6000 W/m2.℃ ZUOYOU。XIANZAIWOMENJIUJINJIEZHESHANGWENMEIYOUSHUOWANDEJIXUJIANGJIE:

WOMENSHUODAOLEJIEZHICANSHUDEWENTI, YOUKZHIFANWEI,JISUANBANPIANSHUFANWEINmin,Nmax;

篮球比分Nmin = Q / Kmax .Δtm .F P .Β

Nmax = Q / Kmin .Δtm .F P .Β

篮球比分QUBANPIANSHUN(Nmin≤N≤Nmax )

篮球比分RUONYIDANmax,ZUO(5)

篮球比分QUNDELIUCHENGZUHEXINGSHI,RUOZUHEXINGSHIQUWANZEZUO(7)

QIURe,Nu

篮球比分Re = W .de/ ν

篮球比分Nu =a1.Rea2.Pra3

QIUa,KCHUANREMIANJIF

篮球比分a = Nu .λ/ de

K= 1 / 1/ah+1/ ac+γc+γc+δ/λ0

F=Q /K .Δtm .Β

YOUCHUANREMIANJIFQIUSUOXUBANPIANSHUNN

篮球比分NN= F/ Fp+ 2

RUON<NN,ZUO(8)

QIUYAJIANGΔp

Eu = a4.Rea5

篮球比分Δp = Eu .ρ.W2 .Ф

RUOΔp>ΔYUN ,ZUO(8);

RUOΔp≤ΔYUN ,JILUJIEGUO ,ZUO(8)

ZHU: 1.(1)、(2)、(3)GENJUYIZHITIAOJIANDEQINGKUANGJINXINGJISUAN

DANGT1-t2=T2-t1SHICAIYONGΔtm = (T1-t2)+(T2-t1)/2

篮球比分XIUZHENGXISHUβYIBAN0.7~0.9

YAJIANGXIUZHENGXISHUф ,DANLIUCHENGфDU=1~1.2 ,ERLIUCHENG、SANLIUCHENGф=1.8~2.0,SILIUCHENGф=2.6~2.8

a1、a2、a3、a4、a5WEICHANGXISHU

XUANXINGJISUANGEGONGSHIFUHAODEYIYIJIDANWEI

XUANYONGBANSHIHUANREQIJIUSHIYAOXUANZEBANSHIHUANREQIJIZUDEMIANJI,TADEXUANZEZHUYAOYOULIANGZHONGFANGFA,DANZHEILIANGZHONGDOUBIJIAONANLIJIE,ZUIJIANDANDESHITAOYONGGONGSHI:

Q=K</strong><strong>×F×Δt

Q——REFUHE

K——CHUANREXISHU

F——HUANREMIANJI

Δt——CHUANREWENCHA(YIBANYONGDUISHUWENCHA)

CHUANREXISHUQUJUEYUHUANREQIZISHENDEJIEGOU,MEIGEBUTONGLIUDAODEBANPIAN,DOUYOUZISHENDEJINGYANGONGSHI,RUGUOBUYANGEDEHUA,KEYIQU2000~3000。ZUIHOUSUANCHUDEBANSHIHUANREQIJIZUDEMIANJIYAOCHENGYIYIDINGDEXISHU。YISHANGJIUSHIWOMENHUNANOULIDEHUANRESHIYEWEIDAJIAFENXIANGDEGUANYUSHIPINJIBANSHIREJIAOHUANQIXINGHAO!

 

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