BI BO CO NHM 3

Vt liu cch nhit trong h thng sy11 Mc ch cch nhit 1.1 Cch nhit trong h thng sy nng 1.2 Cch nhit trong h thng sy lnh

2 Cc vt liu cch nhit thng dng 2.1 Vt liu chu la cch nhit 2.2 Vt liu cch nhit v c 2.3 Vt liu cch nhit hu c3 Cc vt liu cch nhit trong h thng sy 3.1 L t 3.2 Bung sy , L sy 3.3 Cc ng dn nhit 1 Mc ch cch nhit 1.1 Cch nhit trong h thng sy nng - Gim tn tht nhit ra mi trng v tch ly trong vt liu v . - Tp trung nhit lng cho qu trnh nhit . - tit kim nhin liu tng cng qu trnh nhit trong l, nng cao nng sut h gi thnh sn phm.

1.2 Cch nhit trong h thng sy lnh - gim tn tht nhit do nhit bn ngoi truyn vo h thng - Nng cao hiu sut lnh. - Tuy nhin, do nhit khng kh bn ngoi ln hn nhit bn trong lm cho phn p sut hi nc trong kk bn ngoi ln hn phn p sut hi nc trong kk bn trong nn hi nc lun c xu hng thm nhp qua vch vo bn trong. Cn cch m cng vi cch nhit .32 Cc vt liu cch nhit thng dng2.1 Vt liu chu la cch nhit 2.1.1 Gch samt nh Samt t st Than g mn ca Gch samt nhGch c bn nhit t 14 -17 i vi khng kh. xp th tch 50-60% , dn nhit 0.52- 0.7% W/mK.

2.1 Vt liu chu la cch nhit 2.1.3 Gch inat nh

62.2 Vt liu cch nhit v c2.2.1 Bng thy tinh Bng c lm t si thu tinh tng hp ch xut t , x, t st.

2.2.2 Thy tinh btVt liu nhn c bng cch thiu kt hn hp bt thy tinh vi kh l sinh kh, phi liu cha 95 99% bt thy tinh, 1 5% kh l sinh kh. Nhit gii hn 300C.

2.2.3 AmingL mt loi khong c kt cu si, c kh nng tch ra thnh cc si mm n hi mng.Tnh cht: = 0.09 0.26 W/mK, nhit nng chy 1150C, bn nhit 400 C

Cactng AmingGiy Aming

Vi Aming8 2.3 VT LiU CCH NHIT HU C

T NHINTM CIDM BO,SI G,V BOTHAN BNNHN TOBT XP POLYSTUROL BT XP POLYURETHANE BT XP PVCBT XP POLYETHYLENE C CHIA LM 2 LOI2.3.1 Tm ci

an v p thn cy ci thnh cc tm ciKhi lng ring: 175-250 kg/m3H s dn nhit: 0.046-0.092 W/mK

c im: D b mc nt khi m tD chy, d h hng

2.3.3 TM CCH NHIT T THAN BN KHI LNG RING: 150-250 kg/m3 H S DN NHIT: 0.058-0.069 W/mK2.3.2 Dm Bo, Si G, V Bo Khi lng ring : 150- 1100 kg/m3 H s dn nhit: 0.046-0.092 W/mK

2.3.4 VT LiU CCH NHIT GC HU C NHN TOHiN NAY C S DNG RT NHIU L CC TM BT XP CCH NHIT MT S THNG S BT XP POLYSTUROL : 0,03- 0,04 ( W/mK) BT XP POLYURETHANE : 0.023 - 0,03( W/mK) BT XP PVC : 0,03- 0,04( W/mK) BT XP POLYETHYLENE : 0,033( W/mK)

BT XP POLYSTUROLBT XP POLYURETHANE

Mt s vt liu nh :

Bt xp PVC3.1 L t

Tng l c xy bng nhiu loi vt liu khc nhau ty vo thit k v mc ch kinh t. Cc loi vt liu nh gch chu la ,b tng ct thp , t trn rm ct tre, ong , t st ,kim loi chu nhit 3 Cc vt liu cch nhit trong h thng sy

Bn trong l c trt bng va chu la hoc sn chu la .Tng l c dy tng i chu nhit v chng mt nhit ra mi trng

Kt cu tng ,sn cch nhit

Ty kiu thit k m l c hnh dng khc nhau v chiu cao khc nhau Ca l thng bng thp tm hoc hp kim chu nhit bn trong bc cch nhit hoc c thit k cng ca tip nhin liu t

Thn l c bc cch nhit bng cc vt liu cch nhit nh: bng thy tinh Bng gm ceramic,bong-kowo , gch cch nhit ,xi mng . Bn ngoi c bc lp thp mng ,tn p b mt v cch nhit

Bng gm ceramic dng cun

Bng thy tinh

Bng-kowo

Xp PE OPP bo n chng mGiy bc bo n cch nhit

Cao su lu ha

3.2 Bung sy l sy

Vt liu bc cch nhit Bng gm cch nhit chu nhit:Phn c bn l Alumino Silic ioxit (hp cht ca silic di si sa thch hoc thch anh),bng gmc to ra l phc v cho cc d n cch nhit cc nng ngn la trc tip t 850oC ln n 1800oC

Ti kh cch nhitc cu to bi lp mng nhm nguyn cht, b mt c x l oxi ho ph ln tm nha tng hp Polyethylen cha ti kh. c tnh phn x ca lp mng nhm cao cng vi dn nhit ca lp ti kh thp to kh nng cch nhit, cch m, chng nng cc hiu qu cho sn phm ny. Sn phm ti kh cch nhit c u immng nh, d vn chuyn, d thi cng,thch hp vi nhng cng trnh din tch ln nh chng nng mi tole.

Bn trong bc giy bc v cc vt liu khc gi nhit syBc ngoi bung l

Bn ngoi ngi ta bc lp tn cch nhit . gia l lp cch nhit bn trong l giy bc chng tht thot nhit.

293.4 Cc ng dn nhit

Bn ngoi v ng c bc 1 lp bng thy tinh dy nhm hn ch tn tht nhit

CM N CC BN THEO DI31