VIII. SPECIFIC HEAT OF SOLIDS - Brookhaven National Laboratory

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Accelerator Department . BROOKHAVEN NATIONAL LABORATORY Associated Universities, Inc. Upton, New York 11973 ISABELLE Project Technical Note No. 327 THERMAI, CONDUCTIVITY INTEGRALS FOR FIBERGLASS-REINFORCED EPOXY AND AISI 304 STAINLESS STEEL S.R. Plate November 10, 1981 I. INTRODUCTION G-10, a glass-filled epoxy composite, and AISI 304 stainless steel, are materials which are used extensively in the ISABELLE cryogenic transfer system. To calculate reasonably accurate heat leaks at G-10 spacers and stainless steel vacuum breaks where large temperacure gradients occur, the integrated thermal conductivities for the materials in question, over various temperature ranges, were required. Since the desired values were not readily available, the integrated conductivities were calculated. These are shown in Tables 1 and 2. G-10 is a woven cloth/epoxy composite; however, thermal conductivity data could not be obtained for this particular material construction. Conductivity data was found for uniaxial glass-filled epoxy resin material, both parallel to the glass fibers and perpendicular (through material thickness). Refer to Figs. la and lb. The parallel direction is a reasonably accurate analog of G-10 conductivity longitudinally and transversely; the perpendicular direction probably gives somewhat lower heat leak values than would actually be realized through the thickness of a G-10 sheet. These differences must be kept in mind when ushg the thermal conductivity values to approximate 12-10 behavior. 11. METHOD The computer was programmed to perform an integral approximation by summation of areas under the curves of conductivity for the respective materials. A trapezoid approximation method was considered adequate. Data fed to the computer were obtained by visual inspection of the graphs of thermal conductivity taken from the references.' ,2 The glass-reinforced epoxy resin material was chosen as representative of G-10. Concerning those original conductivity plots cited, the glass- epoxy curve required extrapolation from 277°K to 300°K and from 50°K down to 4°K. For the 304 stainless steel curve, extrapolation was necessary only from 277°K to 300"K, the lower limit remaining at 4°K. The information is presented in a form compatible with that presented in tb:e Cryogenic Data Notebook, Vol. I, Section VII. ~ -.
Page 1 and 2: A. B. C. D. E. F. G. H. I. J. K. L.
Page 3 and 4: I .o 1 oa SPECIFIC HEAT - 06 (lo -
Page 5 and 6: VIII-A-4 TEMPERATURE, OK I .UL 2 3
Page 7 and 8: T 3K 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.
Page 9 and 10: ._ 1 I 4i Y- .- W W a WJ 0. 0.0 Tem
Page 11 and 12: Sources of hta: - Bcker'Ly, S. M.,
Page 13 and 14: VIII-B-6 0 N In t- N N rr) m
Page 15 and 16: VI 11-B- 8 0 (u O rn !.F c W a 3 I-
Page 17 and 18: Sources - of kb: SWClTFIC HEAT and
Page 19 and 20: VIJI-c- 3
Page 21 and 22: 3 z 0 IC) w 0. I D 1 t- a LIS w a 5
Page 23: I 2 3 4 5 6 7 8 910 TEMPERATURE, O
Page 26 and 27: 4.181 TEMPERATURE, OF? 20 30 40 50
Page 28 and 29: Y 0 E 0 c - a u Y t- a W r TEMPERAT
Page 30 and 31: smcmc HEAT, ENTlIALpy of l!AmYum So
Page 32 and 33: VIII-E-3 4 0 0 9 (u 0 9 - u) * 0 0
Page 34 and 35: TEMPERATURE, OR VI1 I-I?- 2
Page 36 and 37: Sources of Data: Giauque, W. F. and
Page 38 and 39: VLII-G-3 0 - 0 m
Page 40 and 41: I ooc 100 10 I 0.1 Temperature, F T
Page 42 and 43: Source of Data: Temp. "K SF'ECIFIC
Page 44 and 45: Source of Data: Rands, R. D. Jr., F
Page 46 and 47: 0.0 I Temperature, F IO Temperature
Page 48 and 49: 2 I 0. 0 0.6 0.5 0.4 0.3 0.2 0. i .
Page 52 and 53: , '., , . I .. ., '. . i - 2 - Fig;
Page 54 and 55: -4- t Temp. -OK- - 4 6 8 10 13 20 2
Page 56 and 57: . \.. .. , * :. ' * . Bldg. 510 ' '
Page 58 and 59: 1 .o I 06 0.4 Y g 0.2 \ u) - a3 - =
Page 60 and 61: I * 30 0. f d I: EPON 828 GLASSFIBE
Page 62 and 63: TEMPERATURE, O R I 2 3 4 6 8 10 20
Page 64 and 65: Temp "K 1 2 3 4 5 6 7 8 9 10 15 20
Page 66 and 67: 5 H I 0 I I-L w Y 0.2 0.1 Y 0" .02
Page 68 and 69: VIII-0-1.5 0 0 N N - e. (u - o d d
Page 70 and 71: sources or mta: Arcn, H. H., Craig,
Page 72 and 73: 5 H H I 0 I W W TEMPERATURE, OR --
Page 74 and 75: Sources of DBta: SPEZD'IC HEAT, E3T
Page 76 and 77: VIII-P-3 - * N - 9 0 0 0 0. 4 9 31
Page 78 and 79: VIII-I?-5 0 0 ( u - 0 m a fK W a. 5
Page 80 and 81: I Temperature, F IO Temperature, K
Page 82 and 83: VIII-R-2
Page 84 and 85: TEMPERATURE. OR i 2 4 6 a IO TEMPER
Page 86 and 87: Temp. -K _I-..- 1 2 3 "3 072 4 5 6
Page 88 and 89: 5 H H I VJ I w . Y 0 E .3 ," .I In
Page 90 and 91: VLII-s-5 ENTHALPY, BTU 1 Ob
Page 92 and 93: VIII-T-2 SPECIFIC HEAT (L). BTUllbO
Page 94: 0 (u O rr) *I- O W a r 0: W a 3 t-

VIII. SPECIFIC HEAT OF SOLIDS - Brookhaven National Laboratory

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