第09讲相变贮能装置热的设计方法-课件.ppt

1、,()()cP CC OC Ihp hh ih oQm cTTm cTTmQKA t111OOOOiiimOiWAKAARRAAA2121lnmtttttPrPtPiFt Ns Np 0PipPsPFs Ns maxqqmaxmin,h ic iqCTTminCUANTU minmax,/f NTU CC0sSS*00000120,222*splfwfSSsSSSRRRcTSteFohRTTT引入无量纲几何参数和时间参数：*2000001cosarccos1AslpdgSSSR 0022222cos0r01slmLRdSuuuruprr 质量流量质量通量质量守恒方程方向的动量方程方向的动量方程

2、*000*00.253*02*2*3000*arcsin1/21(1)0.25Pr0.8050.1670.074(2)ltotSLSaSSSmmSSCgRRaCSteArArSSS*1.4PrRaSteAr*200*2000.250.25*1/(3)0.630.210.14Pr0.2*11(4)*llaSqT RNuNuKSSArNuCStedmd*22 arcsin*1*/5.297VSSS*111*2223*212121()2()2,*,1*lsSSSbSSSbrrgbrrSte Fo Arbb接触熔化引起的厚度自然流引起的厚度*0.252SD*Ra5.29801/4*3*21dSPrar

3、ccos*10.385.299dArSSSJSteE*3*34*3*3321002100*2*4*4*2121020201010*2*24*221001210224*2011110.2cossin0.8sinsinsin3sinsin0.25sin1.5sincossinsinsin1*/2*/3 1*/ErrrrrrrrrrrrrrrrrrSrSrrSr 22*11014242*2*3*221011111/41*/sin2*/sin*/0.81*/*/2/3*/*/3rSrSrrrrSrrSrSrSrS*12*1*12100SSS/S*rcos5.301SdSddSddS1/4*30.25*

4、320.25*2224*222222Pr0.1*0.402arccos*11*21*1*111/313dSArRadJSte rSSSSSSrrrrrr0 11/5.3021.521.5 1DSmDsDqT RL R dVNuababTdtbRJJ 224 1*5.3041.5 1SdSNudJJ010*cosSr10*cosSr10*cosSr*S*VNu03s23su LRe=PragTTLGrgTTLRaGrPrall0llpmVaVa12.5a0.95c(TT)LSte FoSte表面常温恒热流122lSSte0.63430.1mwMTTt-0.1990.267*-0.0300.323

5、*0.3930.096ARL/L*L*L LLLLNuRaARNuRaAR非过冷 过冷 等效熔化间距圆柱的长度eq1/336*l3wmeqleq2lhhL0.072 104 10kgqTTLAPrLLLNuRaRaRa通用 222ww0.30.258()()expTconstb80w/m Kqconstb75w/m KhbSteSte1/3*0.01780.0135lnDllwlwlhDRaNuckSteDTconstcqconstcDDDD01.71/4zDz,0mz,0zl2z210.215Raexp4.05Z/Lh D/kc Ra 0.4c0.6 0.24m0.27NuNuNu slmw

6、msTdshh TTkdtx11()111()11()C F dFC dFBiSte FoQFhA TmTaBiBiQ与几何形状有关的常数凝固比（固相体积/封装腔体的容积）1-bLb0mbLLmb0mb0Q(t)Q(t0)TTTTF11TTTTFoFoFoph DLdFNTUQmcQF （）21111111x,t2122222222x,t12TTC Ak AUP(TT)txTTC AC m=UP(TT)tx11012000(,)()(,)()xx LtxTTVxxT x tg xT x tf t244006600kJ m2mkJ66004400sslsAimBmin*0TTciTTcipssl

7、plslipisw*spl0slpsminUAW cUAf+QV1cTTi+cT-Tday CkJ/day CkJ/day CkJ/Cdayo00.30.40.20.40.61/3m00maxff0.61/3m00maxffmaxminh DD G=0.33Prkh DD G=0.26PrkWGA交错整齐13reses6VD DDDn1.00 0.8060.6710.8740.63实际粒径球立方体正四面锥体圆柱体破碎固体sscmiBAscsssc0sB/iAV1-B/iA/LA1-sccc00s0scccs00sccc0iQ/AWG1LABiQ/AV1LBiQ/AV1LBssscccs00cc

8、2D 1LiQ/AD GReBB=44006600kJ/ms00c1/22/31/3h00p0D GRe100 1000hj=Pr2.0Re Pr1.8Rec Gs00c2/30.41h0p0D GRe100 1000hj=Pr1.064Rec Gs00c2/30.43h0p0D GRe100 1000hj=Pr1.55Re Prc Gs00c2/3h0p0D GRe100hj=Pr18.1Rec G低雷诺数上限s00c2/30.51h0p0D GRe100hj=Pr1.75Rec G低雷诺数下限1/6h1/31/2001/6h1/31/2002.01.354j=0.0326PrRe PrRe2.02.031j=0.049PrRe PrRe0.61/3m00maxff0.61/3m00maxffmaxminminh DD G=0.33Prkh DD G=0.26PrkWGAA交错排列整齐排列最小自由流面积20300s001A 1BReD GResVLpfDgf pppp3232D133pD0.6p1/30.6DfDf136vcRec6RehDNu=2 1.1 6 1PrRekffpLDA=160B=1.75A=180B=1.80A=180B=4.0光滑粒子粗糙粒子2max/442mhcGLpfrg