各種材料的導(dǎo)熱系數(shù)

1、各種材料的導(dǎo)熱系數(shù)1、季節(jié)性寒區(qū)隧道圍巖溫度場與變形特性研究蓑3 4三種介質(zhì)的相關(guān)參數(shù)Table3-4Parametasofthr。materials名稱厚端黑卷之黑）保溫層0.050.0372襯砌0.61.452460圍巖-1.9620902、許模-巖土體導(dǎo)熱系數(shù)研究進(jìn)展2.2.1 1 地層巖性由于礦物成分的差異.不同巖性的導(dǎo)熱系數(shù)相差較大口根據(jù)收集到的中國西北盆地、遼河盆地、蘇南地區(qū)、揚(yáng)子區(qū)等地區(qū)的98組巖石導(dǎo)熱系數(shù)得到導(dǎo)熱系數(shù)從大到小排列為海相碳酸鹽巖（白云巖、火山巖八陸相碎屑巖、火山巖、煤（圖1戶叫白云巖白云巖 礫巖礫巖A灰?guī)r灰?guī)rX新十、泥巖新十、泥巖X細(xì)一粉紙砂巖細(xì)一粉紙砂巖。粉眇巖

2、粉眇巖+ +變質(zhì)巖變質(zhì)巖粗粗一中一中粗砂巖粗砂巖- -火山片火山片。中一中細(xì)砂巖中一中細(xì)砂巖煤、炭質(zhì)頁巖煤、炭質(zhì)頁巖圖 1 1 不同地層的平均導(dǎo)熱系數(shù)3、冬季施工手冊30樣品個數(shù)樣品個數(shù)附錄建筑材料熱物理性能計算參數(shù)建筑材料熱物理性能計算參數(shù)順序材料名稱表觀密度p,3、(kg/m)導(dǎo)熱系數(shù)入W/(m K)比熱容ckJ/(kg-K)1 1混凝土240024001.501.501.001.002 2鋼筋混凝土250025001.741.741.051.053陶?；炷?5000.771.054加氣混凝土6000.210.845水泥砂漿18000.931.056混合砂漿17000.871.057磚砌

3、體18000.810.888鋼材785058.000.489木材5500.172.5110陶粒5000.210.8411膨脹珍珠巖2500.040.8412水泥珍珠巖制品4000.070.8413蛭后制品5000.140.6614泡沫水泥4000.0880.8415礦棉1000.0350.7516礦棉板1000.040.7517巖棉板1500.040.7518巖棉氈1000.040.7519聚苯乙烯板300.0381.4720聚氨酯泡沫塑料500.0251.4621聚乙烯泡沫塑料1000.0471.3822鈣塑1200.0491.5923軟木板2000.0652.1024木絲板5000.084

4、2.5125鋸末2500.092.5126草簾1200.061.4627稻草墊1200.061.5128麥桔笆3200.091.5129蘆葦板3500.141.6730毛氈1500.061.8831石油瀝青14000.271.6832瀝青油氈6000.171.4733帆布15000.231.4734石棉水泥板19000.350.8435粘土20000.930.8436爐渣10000.290.7537粉煤灰10000.230.9238砂16000.870.8439后了18001.160.8440水10000.584.1941冰9002.332.1442雪3000.232.144、百度嘴見材料的導(dǎo)

5、熱系數(shù)全導(dǎo)熱系數(shù)單位換克千卬米時它kcal/()irhC)k/厘米秒Ccal/(ctn-s*)瓦/米KW/(m+K)焦耳/M米秒tJ/(cmsC)英熱單位/英尺時丁hT）1278x10-31.16116x10-20.6723601418.74.1872420,859823910-3110-20.57885.980.239100157.81.494.13x10-31.731.73x10-21材料名稱導(dǎo)熱系教W.inK材料名珠導(dǎo)熱系數(shù)W.mK材料名稱導(dǎo)熱系數(shù)W/inK材料名稱導(dǎo)熱系數(shù)W/mK材料名稱導(dǎo)熱系數(shù)W.niKSi150ABS0.25空氣0,00.04導(dǎo)熱硅0,S-3SiO27.6PA0.2

6、5水蒸汽0.023膠里SIC450PC0J水GaAs46PMMAM4-0J曦.酸 5JQh“：5GaP77PP網(wǎng) 7 翻素材（縱向）0JSLTCC2PP-25Kff0.25木材 f 橫向）AINL50軟質(zhì) pvc0.14普通粘土菰A 時上至石45硬質(zhì) PVC0.17耐火萌L06Kovar173PS0.08水泥沙0118鉆石2300LDPE033校范1.99金S17HDPE0.5石棉015-0.37銀429稼腔Dd026玄武巖2.IB純鋁237PU0.25花崗巖能策401鈍硅膠0J5石蠟0.12純株112中再度建而0J7石油0.L4純鈦14.63百度喳整0A2酒者0.7純錫64破瑞tklD紙板0

7、.M-Q.14純鉛35玻璃鋼0.40鑄鐵純集9。泡沫0,045不銹銅r鋼3674FR40J鑄鋁黃銅70環(huán)氨擲脂睡”：工 A36061160青銅32A16063201A17075W5、巖石熱物理性質(zhì)巖看熱物理性質(zhì)在傳熱分析中，熱擴(kuò)散率a（單位是是熱導(dǎo)率X與比熱容c和密度p之比.a=Vpc）其中:熱導(dǎo)率九（單位工W/（m-K）比熱容（單位工J/（kgK）密度（單位:kg/（mA3）c熱擴(kuò)散率又叫導(dǎo)溫系數(shù)，它表示物體在加熱或冷卻中，溫度趨于均勻一致的能力，這個綜臺物性參數(shù)對穩(wěn)態(tài)導(dǎo)熱沒有影響，但是在非穩(wěn)態(tài)導(dǎo)熱過程中,它是一個非常重要的參數(shù).對于普通的巖石來說，-10A-6mA2/s=在300K5空氣的

8、熱擴(kuò)散率是0.000024mA2/s，表 3 幾植典型士步巖石及回肅料的熱物性導(dǎo)捎系數(shù)入Wm K）tr*Q(lO-4nr/w)F(KR/nr*)上填號石他密黠士含水*15%）（含水L41.9.6496710,54-0.n12S1925輕質(zhì)拓土（含水量 15%）輕質(zhì)砧上（含水果 5%）d7-1.00.5。,90.54d$40.6512851285致甯砂土（含水量 is%）N8780.97L27t_-_192S致需砂土（含水斌 5%）2-&3L10-l.621925衽質(zhì)砂土（含水量 15%）L0T.10.54L081285輕質(zhì)砂上（含水 Sts%）花崗巖石灰石9L91工12*43.80.6

9、47.39Q.97L91。,97L511?852650泊 5 卜-然噎門砂著九450.75L 加?.S；a?t-,KXWL4-2.4仇 750.97于 JK 巖L，L02 10,Mf86回國科蟀詞上f 含有 20%30%的眼體）57”0.75含有 20%海溷士.SOMSLOF砂子的混合物L(fēng)47L64i-.地源熱泵系統(tǒng)工程技術(shù)規(guī)范雖然一般而言各類巖石的導(dǎo)熱系數(shù)最大，砂土次之，黏土最小，但是由于巖石孔隙率住導(dǎo)致含水量低，因此巖石用于土壤換熱器的換熱持久性最差，黏土次之，砂土最好。這是目于土壤和巖石的比熱遠(yuǎn)小于水的比熱， 一般常見的巖石比熱大約是0.84KJKg K,而水的H熱是4.19KJ， Kg

10、K,干土壤的比熱在L6KJ，Kg K,單位水體中可以儲存的溫差能約是干土壤的1.22.3倍，巖石的2倍。因此土凄中含水量的高低對土篡源熱泵的效果有明顯的影響，d壤中水份的遷移還對過渡季節(jié)空調(diào)系統(tǒng)停止運行后地下土壤溫度的自然恢復(fù)至關(guān)重要， 特另是對土壤源熱泵系統(tǒng)的持久運行作用很大。土壤比重：土壤密度與4C時純水密度之比。-般取2.65；火山石的物理與化學(xué)部分指標(biāo)如下：物理性能指標(biāo)：性能指標(biāo)單位檢測結(jié)果性能指標(biāo)單位檢測結(jié)果火山石(玄武巖)的特性，巖丁的比熱容處去征巖石熱容性的重要指標(biāo),其大小取決于巖石的礦物組成、 力機(jī)質(zhì)含玄廿2含水狀態(tài).如常見礦物的比熱容多為(0.77.2)X103/(kg K)

11、,丐此相應(yīng).f-114含彳i機(jī)質(zhì)的巖石，其比熱容也在該范用內(nèi)變化，井的巖石密度增加而該小。又如布機(jī)質(zhì)的比斐容牧人約為(0.82.1)X10)/(kg K),因此,富臺仃機(jī)質(zhì)的巖上體(如泥炭等),其比熱第也較大.常見巖石的比熱容列于表3-4.多孔”含水的，心常仃較大的比熱容，困為水的比熱容較巖石人得多(為4.19X101/(kg-K).閃此，設(shè)卡重為x隔的巖石中含有x2g的水，則比熱容C濕為：z,一C CM M C一式中：a,q分別為干燥巖石和水的比熱容.巖行的比熱容常在實驗室采用差示掃描量熱法(DSC法)測定。(3-18)-，“匕下JIHI*石的m刷nse e 石白度（V V（C C）比熱，J

12、/ftfK)J/ftfK)afltafltCDCD尊 M M 敷W/(m-KW/(m-K崖COCO熟 ITIT 效率玄甲 f f2442.22442.25050MX4M7.6MX4M7.6T TL61T.7SL61T.7S60604386.24386.23.0J3.0J5050MlMl2S2S2.122.122020 .4S.4S2.2.929225252 2 M M2020t.47t.47_2.2.50502 2SOSOW.W.】97*597*550502.17T012.17T01SOSO】0.29J40.29J4 3131花崗閃性好2.2.62622 2 76762020837.4837.

13、41256.01256.02020I.S4T.33I.S4T.332020S.03706S.03706正長詈2.S02.S050502.22.2蛇蚊巖2020】0 0211211片麻安2.70-2.T32.70-2.T350507 7 限 22 70.970.9SOSO25122512 9494SOSOJJ.MM.07JJ.MM.07片嫌巖（K?片tMtM50502 2 9393片賺言（*片 0 02.002.00大建#26026025252.492.49石英巖2M2M50507 7”.1.160604 41818soso29.S229.S2石育2 222.9122.9150504.106.0

14、74.106.07soso17.17.吟 2&2&T T站上足友巖Z Z43432.2.，4 4SOSO”衣 797277972750501 1 7373267267sosoB.0W1.MB.0W1.M白云號幺 53-2.7253-2.72soso921.921.1 11000.61000.650502828工”soso10.75-14.10.75-14. 7 7M M 巖241241217217soso3.I5Q43.I5Q4MM1.7t.M1.7t.M6060 .24-12.16.24-12.16多及泥質(zhì)看2 2 432.62432.62sosoH37.49MlH37.49

15、Ml4 4K K1 1. . 4 4。50509.(M9.(M6464雙目灰?guī)r2582582/62/65050824.J921824.J921 1 150502342341511515050ld71IX2ld71IX2足眼士2.2.W2W2 ，7 7M M9 9 憾 S-92R3S-92R350502-2-6060a*13.tta*13.tt枯土板包 GJGJ2.32.3SOSOSM.3SM.35050l l 44IH44IH5050&4A15.15&4A15.15*t*t2.32.2I2.32.2I505044SS.7444SS.74W W6 6W-31W-31 D D* *

16、，S52.97S52.975050762l071.R762l071.R50502.2.14-5.114-5.15050】0 0 Ag12Ag120 巖27027025252.602.60板* *（/:/:M*M*）2.H2.H2525IMIM巖石黑型粒密度/ /(t/cm(t/cm塊像密度Xt/cmXt/cm1 1) )空工率(%)展水率(%)(%)軟化敏 a a ) )花崗巖2.2.吁 2 2 848423n.23n.8080a4a4a5a5aiai，.o.oa72aa72aoror內(nèi)性2.2.吁 1101102 2 52-252-2 9696a2-0.5a2-0.5a3-5-0a3-5-0

17、a6X0.80a6X0.80tl雄老2.BO-X2.BO-X10102 2 532532 9797as-&oas-&oa a -s.o-s.o&33&33(L00(L00M 氏巖2.2.A&20A&202 2 吁 2 2 9898Q3T0Q3T0a5-4.0a5-4.0安山圣2.10-2.S02.10-2.S02.S0-2.702.S0-2.701 1 10104545a3-4.5a3-4.5asi-aoiasi-aoi珀七2.2.60260214142 24gz4gz808021fo21foa4a41.71.70.70.7681681幺武巖2.

18、602.60工 30302.50-3-102.50-3-100.50.57.27.2a a”2 2 8 80.3-0.950.3-0.95灰?guī)r2.2.5 5 2 2 78782 2 加2502501.6-7-51.6-7-50.67.S0.67.Sa62788a62788碌若2.677712.67771幺 4g4g266266o.81aoo.81aodA2.4dA2.40.50-0.960.50-0.96巖2.2.60602762762.20-2.712.20-2.711.61.6如 0 00.29.00.29.0a650.a650.9797頁巖2.2.57572 2 7777230-2622

19、30-2620.41d00.41d0d5d5& &2 20.240.240.740.74壬灰?guī)r2 2*28S*28S23g23g2772770.5-27.00.5-27.0(H4(H4 5 50.7ko.940.7ko.94說加*2.70-2.2.70-2.808023270232701 1 00】d0d0as-ioas-ioa44a440.S40.S4白云巖2.2.60602902901 110-2.10-2.70700.30.3蛉 0 0aITaIT。片麻巖2.22SOTSOT00000i7220i722a1d7a1d7a75-a97a75-a97

20、石英片總2M2M28028021g27021g27067706770a-a-a44a440.840.84綠泥石片巖180-2.90180-2.90210-2.te210-2.te0.80.82121a a1010L LS Sa5bo.69a5bo.69千枚號2-81-2.H2-81-2.H2 27 7】2.862.860.4-160.4-16as-i.8as-i.8a67y96a67y96泥貿(mào)板巖2727 卜 2ts2ts23k28023k280aITSaITSo.i-aso.i-asau-o.62au-o.62桓看2.2.80802852852626- -270270aiaiEOEO0.11

21、.00.11.0石英巖25328425328424k2SO24k2SO&1T7&1T70.1-1.50.1-1.50.X0.X。%-幾種胃石的熱學(xué)氣性敷巖石比熟客C C( (“ K)K)尊絡(luò)系數(shù)*W/GnW/Gn K)K)a彈性模魚*(lOMPa)*(lOMPa) 熟應(yīng)力系數(shù)而(MPa/K)(MPa/K)WK*720.720.1 12.0)2.0)0.5-10.5-1I I0.40.40.0.5 5霹智6%.26%.2X3SX3S1-21-24 43 30.4-0.0.4-0.5 5花青若782978292.682.68a6a66 61-81-8(L4-0.(L4-0.6 6片

22、麻巖879.2879.22.552.550.8-30.8-33 36 60.4-0.0.4-0.9 9石英詈799.7799.75.535.53I I2 24 40.40.4頁巖774774 6 61.721.72a9a91.51.54 40.4-0.0.4-0.6 6石質(zhì)智90&S90&S2092090.30.33 34 40.2-1.00.2-1.0白云巖749.4749.43.553.551 12 24 42 20.40.4表1 1黃土導(dǎo)熱系數(shù)和比熱實測結(jié)果TableTable1 1TestedthermalparametersofloessTestedthermalpa

23、rametersofloess土樣編號含水量/%千密度103kgm.導(dǎo)熱系數(shù)比熱容/kJmK”I0.491.050.291497一0.491200.31158737.781.050.35159047.781.200.481696510.271250.521S90610.271.350.541968710.271.450.582154810.271.550.612288910.271.650.6324081016.501250.6620061116.501350.7221841216.501.450.7623051316.501.550.7925091416.501.650.8526381518

24、.51250.752107161S.51.350.8022111718.51.450.872379IS1S.51.550.922565191S.51.650.9827612022.31250.9221862122.31.350.992405一22.31.451.0625142322.31.551.1027012422.31.651.16284625準(zhǔn)飽和1.451.652950I51.209060303-實測.公式（9）w=22-一=1855%_.一-_*一二二一165%=1027%0.1.0II1.21.31.41.5161.7I密底叩g cmFig.Fig.4 4CoefficientofthermalconductivityofloessversusCoefficientofthermalconductivityofloessversusdrydensitydrydensity導(dǎo)熱系數(shù)隨干密度的變化圖5導(dǎo)熱系數(shù)隨含水量的變化1.4111111.01.11.21.31415161.7I密度/g cnr，實測公式（9）13333mmmm13333mmmmm m或g/g/c c的”g/c55g/c555552345655523456510152025含水量w/%o529630o529630 6比熱容隨干密度的變化Fig.5Coefficient