GVHD: PHM HNG NAM_SVTH: NGUYN PHC HUY_12017431

NHN XT CA GIO VIN HNG DN------------------------

Bi 1: NG HC QU TRNH SYMc ch Th NghimKho st qu trnh sy i lu vt liu l giy lc trong thit b sy bng khng kh c nung nng nhm:

Xc nh ng cong sy W. Xc nh ng cong tc sy . Gi tr m ti hn , tc sy ng tc N, hh s sy K.

S th nghim

1. Cch tin hnh th nghim.

Bt cng tc tng. em cn vt liu xc nh G0. Lm m u cc t vt liu. Kim tra thit b sy: nc vo ch o nhit bu t. Ghi gi tr nhit bu t bu kh ti thi im ban u. iu chnh tc qut nt iu chnh tc ( theo yu cu GVHD), bt cng tc qut ( ch mt pht cho phng sy kh). Ci t mc nhit lng ca in tr ( theo yu cu ca GVHD), bt cng tc gia in tr gia nhit. Khi thit b sy hot ng n nh ( nhit bu kh khng i ) khong 10 pht, m ca phng sy, t nh nhng cc t giy lc ln gi , ng ca phng sy. Ghi nhn cc gi tr: ch s cn, nhit bu kh, nhit bu t, vn tc ca khng kh trong phng sy thi im ban u. Ghi nhn cc gi tr: ch s cn, nhit bu kh, nhit bu t trong phng sy sau mi thi gian 3 pht. Khi khi lng vt liu khng thay i sau 5 ln o th ngng th nghim. Tin hnh th nghim cc mc in tr gia nhit v tc qut khc nhau. Ngng thit b: chuyn cc nt iu chnh ( in tr, qut ) v trng thi 0, ng cng tc in tr gia nhit, ng cng tc qut.

Kt Qu Th Nghim.Bng 1. S liu th nghim mc 500CMc 500C

SttGi (g)tu (0C)tk (0C)

102604247

232544247

362474147

492403945

5122253844

6152113844

7181963844

8211813844

9241653743

10271503743

11301353946

12331253744

13361153844

14391103945

15421103946

16451103946

17481103946

18511103946

Bng 2. Kt qu th nghim mc 400CMc 400C

SttGi (g)tu (0C)tk (0C)

102913041

232802941

362722941

492652940

5122562941

6152482941

7182412941

8212332941

9242252942

10272133042

11302083042

12332013042

13361893042

14391843042

15421773042

16451683042

17481593142

18511513042

19541433041

20571343042

21601253143

22631173143

23661113243

24691103243

25721103243

X l kt quBng 3: Kt qu tnh ton mc 500C SttNi (%/s)

10162,63

2180156,570,03367

3360149,490,03933

4540142,420,03927

5720127,270,08417

6900113,130,07855

7108097,980,08417

8126082,830,08417

9144066,670,08977

10162051,520,08417

11180036,360,08422

12198026,260,05611

13216016,160,05611

14234011,110,02777

15252011,110

16270011,110

17288011,110

18306011,110

Bng 4: Kt qu tnh ton mc 400CSttNi (%/s)

10193,94

2180182,830,06173

3360174,750,04489

4540167,680,03928

5720158,590,05051

6900150,510,04489

71080143,430,03928

81260135,350,04489

91440127,270,04489

101620115,150,06734

111800110,100,02806

121980103,030,03928

13216090,910,06734

14234085,860,02806

15252078,790,03928

16270069,700,05051

17288060,610,05051

18306052,530,04489

19324044,440,04489

20342035,350,05051

21360026,260,05051

22378018,180,04489

23396012,120,03367

24414011,110,00561

25432011,110,00000

Bng 5: Kt qu tnh ton thi gian syThng sMc 500CMc 400C

101,46118,85

11,1111,11

38,8130,04

44,9441,80

pb(mmHg)5034

ph(mmHg)4829

0,7890,789

Jm(kg/m2.h)1,5783,945

Nlt (%/h)388,28485,3534

Ntn (%/h)231,37152,3667

K (1/h)2,711,4141

0,2640,4928

1,0643,3023

1,3283,7951

th

th ng cong sy cho cc ch sy th ng cong sy 500C

Hnh 1. th ng cong sy 500C

th ng cong sy 400C

Hnh 2. th ng cong sy 400C th ng cong tc sy N th ng cong tc sy mc 400C

Hnh 3. th tc sy 400C th ng cong tc sy mc 500C

Hnh 4. th tc sy 500CGhi ch1.1 Cng sy vt liu:

Trong : : h s trao i m (kg/m2.h.mmHg)pb p sut hi m trn b mt vt liu v bng p sut bo ha nhit bu t (mmHg).ph p sut ring phn ca hi nc trong khng kh (mmHg).B p sut trong phng sy (mmHg) khi lng ring cht kh trong vt liu (kg/m3).Rv t s gia th tch v b mt vt liu (m3/m2)N tc sy ng tc (%/s) 1.2 H s trao i m c th xc nh theo phng trnh thc nghim (kg/m2.s.mmHg)Trong wk vn tc tc nhn sy.

1.3 Tc sy ng tc:

Trong F: b mt bay hi ca vt liu(m2)V: th tch ca vt liu(m3) khi lng ring ca cht kh trong vt liu(kg/m3) : khi lng vt liu kh tuyt i(kg) = : b mt ring khi lng ca vt liu(m3/kg)

1.4 Thi gian sy trong giai on ng tc:

Trong : : m ban u ca vt liu (%): m ti hn quy c (%) : Tc sy trong giai on ng tc (%/s)

1.5 Tc sy trong giai on gim tc:

du (-) ch tc sy gimK gi l h s sy,ph thuc vo ch sy (tc sy ng tc v tnh cht ca vt liu (1/h). K l h s gc ca ng thng gim tc v c tnh:

1.6 Thi gian sy trong giai on gim tc:

)=Trong : l m sau cng ca vt liu sy (

1.7 Gin Ranzim

BN LUN

1. Nhn xt ng cong sy v ng cong tc sy. Gii thch. Khi sy lng m s bc hi v gim dn theo thi gian tc sy cng bin i theo m ca vt liu. ng cong sy gim dn theo thi gian.

2. cc ch sy khc nhau th thi gian sy thay i nh th no. Gii thch. cc ch sy khc nhau th thi gian sy l khc nhau, khi thi gian sy cng tng th m cng gim cng nh nhit sy cng lm thi gian sy gim theo.

3. nh gi s khc nhau v s thay i ca ng cong sy v ng cong tc sy nhit lm vic ca phng sy. cc nhit lm vic khc nhau ng cong tc sy khng thng nh trn l thuyt nhng vn c hnh dng ph hp. cc nhit lm vic khc nhau ng cong sy thay i v tr s nhng khng thay i v hnh dng.

4. Cho bit mt s ng dng ca qu trnh sy trong thc t Qu trnh sy c s dng trong cng ngh ha hc v thc phm Qu trnh sy lnh trong ch bin rau qu Qu trnh sy kh cc loi rau tri Qu trnh sy kh nng sn Trong ha hc, dng sy cc lng m trong cc cht ha hc Trong sinh hot, dng sy kh qun o t, sy cc vt liu, dng m

5. Nu cc s c c th gp phi trong qu trnh vn hnh v phng php khc phc. Khi vn hnh my cn kim tra p sut kh nn c n nh, kim tra cc van h thng ng dn c m v ng c khng, ngun in v cc h thng c hot ng ng thng s khng. Nu gp s c phi hi cc chuyn gia. Khi my sy hot ng c khong 10 pht hy thi kh nn dn dn vo my sy. Khi thi kh nn nu m ton b cc van, cc b phn trn trong v cc thit b c th b hng. Kim tra c b phn ni ng no b r r khng..

TI LIU THAM KHO[1]Hng dn thc hnh qu trnh v thit b (H i hc) Nh xut bn lao ng. [2]Qu trnh v thit b truyn khi Trng i hc cng nghip TP. H Ch Minh Nm 2011 (Lu hnh ni b).[3]Bng tra cu qu trnh c hc truyn nhit truyn khi Nh xut bn i hc quc gia TP. H Ch Minh.

19