Termotehnic.Anex 131

ANEXA 1

Tabel 1 Uniti de msur pentru presiune i valoarea lor echivalent n [Pa]

bar 2m

kgf 2cmkgf (at)

torr mmH2O ft H2O (psi)

Pa

2mN 10

5 9,81 98100 133,32 9,81 3,34.10-4 1,45.10-4

unde semnificaia notaiilor este: psi- pounds/inch2 ft H2O-picioare coloan de ap

Tabel 2 Uniti de msur pentru energie i valoarea lor echivalent n [J]

mkgf cal (calorie ) kWh J 9,81 4,18 3,6.106

Tabel 3.Proprieti fizice i constante caracteristice unor gaze, la presiunea de 1 atm i temperatura de 20oC

Densitatea, Constanta

gazului, R Exponentul adiabatic, k

Vscozitatea dinamic, *10-5

Cldura specific

izobar, cp

Gaz

3mkg Kkg

J

- sm

kg Kkg

J

Aer 1,205 287,13 1,402 1,8 1004

Oxigen 1,332 260 1,397 2,02 910

Hidrogen 0,0838 4126 1,406 0,89 14028,4

Azot 1,165 297 1,401 1,78 1039,5

Heliu 0,1664 2077 1,667 1,97 5192,5

Dioxid de

carbon

1,839 189 1,297 1,48 831,6

Monoxid de

carbon

1,165 297 1,402 - 1039,5

Argon 1,662 208 1,67 2,23 520

Xenon 5,459 633 1,667 2,28 -

132 Termotehnic. Anex

Tabel 4 Cldura specific medie pentru substane uzuale

Substana Cldura specific ]KkgkJ[

Alcool etilic 2,47

Aluminiu 0,88

Cupru 0,39

Oel 0,63

Mercur 0,14

Platin 0,13

Ap 4019

Ulei 1,97

Abur (101,3kPa) 2,02

Ghea 2,05

Tabel 5 Coeficienii de conductivitate termic pentru materiale uzuale

Material Coeficientul de conductivitate termic,

KmW

Cupru 399

Aluminiu 237

Fier turnat 52

Oel carbon 43

Oel cu 10% Ni 19

Oel inox 14,4

Mercur 7,9

Vat mineral 0,07

Vat de sticl 0,06

Ap 0.61

Aer 0.026

Termotehnic.Anex 133

Tabel 6 Presiunea de saturaie a vaporilor de ap din aerul umed, n funcie de

temperatur

t [oC]

ps [mbar]

t [oC]

ps [mbar]

t [oC]

ps [mbar]

-4 4,368 8 10,721 20 23,37 -2 5,172 10 12,271 22 26,42 0 6,108 12 14,015 24 29,82 2 7,054 14 15,974 26 33,6 4 8,129 16 18,169 28 37,78 6 9,346 18 23,37 30 42,41

Tabelul 7.Coeficienii de conducie termic ai ctorva gaze

Coeficient de conductivitate termic, Gaz

KmW

Aer 2418

Oxigen 2439

Azot 2418

Dioxid de carbon 14178

Monoxid de carbon 2331

Hidrogen 17347

Tabel 8 Coeficientul de emisivitate, , pentru cteva materiale i tipuri de suprafee Materialul Temperatura [oC] Coeficientul de emisivitate,

Aluminiu -polizat -oxidat

200-500 200-600

0,039-0,057 0,1-0,2

Oel -grunduit; -oxidat.

900-1100 200-600

0,55-0,61 0,79

Vopsea -pe baz de ulei; -pe baz de aluminiu.

100 100

0,92-0,96 0,3

Materiale plastice 10-90 0,91

Ap 0-100 0,95-0,963

134 Termotehnic. Anex

Tabel 9 Proprietile termodinamice ale apei i aburului n stare de saturaie ts [oC]

Ts [K]

ps [bar]

hl kJ/kg

hg kJ/kg

hlg kJ/kg

ts [oC]

Ts [K]

ps [bar]

hl kJ/kg

hg kJ/kg

hlg kJ/kg

0.0 273.1 0.00610 0 2501 2501 54 327.1 0.1500 226. 2599 2373 1 274.1 0.00656 4.22 2502 2498 55 328.1 0.1574 230. 2600 2370 2 275.1 0.00705 8.42 2504 2496 56 329.1 0.1651 234. 2602 2368 3 276.1 0.00757 12.63 2506 2493 57 330.1 0.1731 238. 2604 2365 4 277.1 0.00812 16.84 2508 2491 58 331.1 0.1814 242. 2606 2363 5 278.1 0.00871 21.05 2510 2489 59 332.1 0.1901 246. 2608 2361 6 279.1 0.00934 25.25 2512 2487 60 333.1 0.1991 251. 2609 2358 7 280.1 0.01001 29.45 2514 2485 61 334.1 0.2086 255. 2611 2355 8 281.1 0.01072 33.65 2516 2482 62 335.1 0.2184 259. 2613 2353 9 282.1 0.01147 37.85 2518 2479 63 336.1 0.2285 263. 2614 2350 10 283.1 0.01227 42.04 2520 2477 64 337.1 0.2391 267. 2616 2348 11 284.1 0.01311 46.22 2521 2475 65 338.1 0.2501 272. 2617 2345 12 285.1 0.14016 50.41 2523 2473 66 339.1 0.2615 276. 2619 2343 13 286.1 0.01496 54.60 2525 2470 67 340.1 0.2733 280. 2621 2341 14 287.1 0.01597 58.78 2527 2468 68 341.1 0.2856 284. 2623 2338 15 288.1 0.01704 62.97 2528 2465 69 342.1 0.2984 288. 2625 2336 16 289.1 0.01817 67.16 2530 2463 70 343.1 0.3117 293. 2626 2333 17 290.1 0.01936 71.34 2532 2461 71 344.1 0.3254 297. 2628 2331 18 291.1 0.02062 75.53 2534 2458 72 345.1 .03396 301. 2630 2329 19 292.1 0.02196 79.72 2536 2456 73 346.1 0.3543 305. 2631 2326 20 293.1 00.0233 83.90 2537 2454 74 347.1 0.3696 309. 2633 2323 21 294.1 0.02486 88.09 2539 2451 75 348.1 0.3855 314. 2635 2321 22 295.1 0.02643 92.27 2541 2449 76 349.1 0.4019 318. 2636 2318 23 296.1 0.02808 96.46 2543 2447 77 350.1 0.4189 322. 2638 2316 24 297.1 0.02982 100.6 2545 2444 78 351.1 0.4365 326. 2639 2313 25 298.1 0.03166 104.8 2547 2442 79 352.1 0.4547 330. 2641 2310 26 299.1 0.03360 108.9 2548 2440 80 353.1 0.4736 334. 2643 2308 27 300.1 0.03564 113.1 2550 2437 81 354.1 0.4931 339. 2645 2306 28 301.1 0.03779 117.3 2552 2435 82 355.1 0.5133 343. 2646 2303 29 302.1 0.04004 121.5 2554 2432 83 356.1 0.5342 347. 2648 2300 30 303.1 0.04241 125.7 2556 2430 84 357.1 0.5558 351. 2650 2298 31 304.1 0.04491 129.8 2558 2428 85 358.1 0.5781 35.9 2651 2295 32 305.1 0.04753 134.0 2559 2425 86 359.1 0.6011 360. 2653 2293 33 306.1 0.05029 138.2 2561 2423 87 360.1 0.6249 364. 2655 2291 34 307.1 0.05318 142.4 2563 2421 88 361.1 0.6495 368. 2656 2288 35 308.1 0.05622 146.6 2565 2418 89 362.1 0.749 372. 2658 2285 36 309.1 0.05940 150.7 2567 2416 90 363.1 0.7011 377. 2659 2282 37 310.1 0.06274 154.9 2569 2414 91 364.1 0.7281 381. 2661 2280 38 311.1 0.06274 159.1 2570 2411 92 365.1 0.4560 385. 2662 2277 39 312.1 0.06991 16332 2572 2409 93 366.1 0.4848 389. 2664 2274 40 313.1 0.07375 167.5 2574 2406 94 367.1 0.8145 393. 2666 2272 41 314.1 0.07777 171.6 2575 2403 95 368.1 0.8451 398. 2668 2270 42 315.1 0.08198 175.8 2577 2401 96 369.1 0.8767 402. 2669 2267 43 316.1 0.08639 180.0 2579 2399 97 370.1 0.9093 406. 2671 2265 44 317.1 0.09101 184.2 2581 2397 98 371.1 0.9429 410. 2673 2262 45 318.1 0.09584 188.4 2582 2394 99 372.1 0.9775 414. 2674 2259 46 319.1 0.10088 192.5 2584 2391 100 373.1 1.0132 419. 2676 2257 47 320.1 0.10614 196.7 2586 2389 101 374.1 1.0499 423. 2677 2254 48 321.1 0.11163 200.9 2588 2387 102 375.1 1.0876 427. 2679 2251 49 322.1 0.11736 205.1 2590 2385 103 376.1 1.1265 431. 2680 2248 50 323.1 0.12335 209.3 2592 2383 104 377.1 1.1666 436. 2681 2245 51 324.1 0.12960 213.5 2593 2380 105 378.1 1.2079 440. 2683 2243 52 325.1 0.13612 217.7 2595 2377 106 379.1 1.2504 444. 2685 2241 53 326.1 0.14292 221.9 2597 2375 107 380.1 1.2941 448. 2687 2238

ApaTabelul 7.Coeficientii de conductie termica ai ctorva gazeGaz

Tabel 8 Coeficientul de emisivitate, e, pentru cteva materiale si tipuri de suprafete