Abimael MartellandClaude Opus 4.6
6c005ef4c2
* fix(fonts): CID-as-Unicode passthrough and subscript/superscript merging Add smart CID-as-Unicode passthrough for Identity-H fonts without ToUnicode maps. Uses /W array median CID heuristic to distinguish Unicode-CID PDFs (Chromium-generated) from GID-based subsets. Add merge_subscript_items() pass that merges small-font items (<75% of dominant font size, ≤4 chars, tightly adjacent) into parent items. Fixes chemical formulas (NH3, H2O, KClO3), footnote references, and subscript notation (vf, Hfg, m3/kg) that were previously orphaned as separate text items. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> * fix(subscripts): restrict merge to purely numeric text only Tighten subscript merging to only merge items containing ASCII digits (0-9). This avoids false positives with ordinal indicators (º), letter subscripts (sol, vf), and small bullet characters (▶) that caused table restructuring regressions. Numeric-only keeps the primary wins: chemical formulas (NH3, H2O), footnote references, and unit notation (m2, m3). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> * fix(subscripts): restrict merge to parent text ending with a letter Only merge numeric subscripts when the parent item's text ends with an alphabetic character. Prevents false merges like "33" + "1" in fractions (33 1/3%), table credit numbers after spaces, and footnote refs after punctuation (land.1 → land. 1). Chemical formulas (NH3, H2O, KClO3) still merge correctly since parent ends with a letter. Reduces pdf-eval regressions from 13 to 2 (both are correct reversions of over-aggressive footnote merging from the prior commit). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
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5.5 KiB
Technical Information
l T-12 SI
DuPont Fluorochemicals
Thermodynamic Properties
of
®
Freon 12
(R-12) Technical Information Technical Information
® Thermodynamic Properties of Freon 12 Refrigerant (R-12) SI Units
Tables of the thermodynamic Units properties of R-12 have been developed and are presented here. P = Pressure in kPa. Absolute This information is based on values calculated using the NIST REFPROP T = Temperature in Celcius Database (McLinden, M.O., Klein,
S.A., Lemmon, E.W., and Peskin, Vf = Fluid (liquid) specific volume A.P., NIST Standard Reference in cubic meters per kilogram Database 23, NIST thermodynamic and transport properties of Vg = Vapour (gas) specific volume refrigerants and refrigerant in cubic meters per kilogram mixtures – REFPROP version 6.01, Standard Reference Data Program, df and dg = Fluid and Vapour National Institute of Standards and (respectively) densities in Technology, 1998). kilograms per cubic meter H = Enthalpy (kJ/kg)
S = Entropy (kJ/kg.K)
Physical Properties
Chemical Formula CCl2F2
Molecular mass 120.91
Boiling Point-29.75°C At one atmosphere
Critical Temperature 111.97°C
Critical Pressure 4136 kPa
3 Critical Density 565.0 kg/m
Critical Volume 0.0018 m /kg
l
TABLE 1
Freon ® 12 Saturation Properties-Temperature Table
| Temp | Pressure | Volume | Density | Enthalpy | Entropy | Temp | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | [kPa] | [m3/kg] Liquid v | Vapour v | [kg/m3] Liquid d | Vapour d | Liquid H | [kJ/kg] Latent H | Vapour H | [kJ/K-kg] Liquid S | Vapour S | °C |
| -100 | 1.2 | 0.0006 | 10.0000 | 1679.0 | 0.100 | 113.3 | 192.8 | 306.1 | 0.6077 | 1.7210 | -100 |
| -99 | 1.3 | 0.0006 | 9.1670 | 1677.0 | 0.109 | 114.1 | 192.4 | 306.5 | 0.6124 | 1.7170 | -99 |
| -98 | 1.4 | 0.0006 | 8.4100 | 1674.0 | 0.119 | 115.0 | 192.0 | 307.0 | 0.6171 | 1.7130 | -98 |
| -97 | 1.6 | 0.0006 | 7.7250 | 1671.0 | 0.129 | 115.8 | 191.6 | 307.4 | 0.6218 | 1.7100 | -97 |
| -96 | 1.7 | 0.0006 | 7.1040 | 1669.0 | 0.141 | 116.6 | 191.3 | 307.9 | 0.6264 | 1.7060 | -96 |
| -95 | 1.9 | 0.0006 | 6.5400 | 1666.0 | 0.153 | 117.4 | 190.9 | 308.3 | 0.6310 | 1.7030 | -95 |
| -94 | 2.0 | 0.0006 | 6.0270 | 1663.0 | 0.166 | 118.2 | 190.6 | 308.8 | 0.6356 | 1.6990 | -94 |
| -93 | 2.2 | 0.0006 | 5.5610 | 1661.0 | 0.180 | 119.1 | 190.1 | 309.2 | 0.6402 | 1.6960 | -93 |
| -92 | 2.4 | 0.0006 | 5.1360 | 1658.0 | 0.195 | 119.9 | 189.8 | 309.7 | 0.6448 | 1.6920 | -92 |
| -91 | 2.6 | 0.0006 | 4.7480 | 1655.0 | 0.211 | 120.7 | 189.4 | 310.1 | 0.6493 | 1.6890 | -91 |
| -90 | 2.9 | 0.0006 | 4.3950 | 1653.0 | 0.228 | 121.5 | 189.1 | 310.6 | 0.6538 | 1.6860 | -90 |
| -89 | 3.1 | 0.0006 | 4.0720 | 1650.0 | 0.246 | 122.4 | 188.6 | 311.0 | 0.6583 | 1.6830 | -89 |
| -88 | 3.4 | 0.0006 | 3.7760 | 1648.0 | 0.265 | 123.2 | 188.3 | 311.5 | 0.6628 | 1.6800 | -88 |
| -87 | 3.6 | 0.0006 | 3.5050 | 1645.0 | 0.285 | 124.0 | 188.0 | 312.0 | 0.6672 | 1.6770 | -87 |
| -86 | 3.9 | 0.0006 | 3.2570 | 1642.0 | 0.307 | 124.8 | 187.6 | 312.4 | 0.6716 | 1.6740 | -86 |
| -85 | 4.3 | 0.0006 | 3.0290 | 1640.0 | 0.330 | 125.7 | 187.2 | 312.9 | 0.6761 | 1.6710 | -85 |
| -84 | 4.6 | 0.0006 | 2.8190 | 1637.0 | 0.355 | 126.5 | 186.8 | 313.3 | 0.6804 | 1.6680 | -84 |
| -83 | 5.0 | 0.0006 | 2.6270 | 1634.0 | 0.381 | 127.3 | 186.5 | 313.8 | 0.6848 | 1.6660 | -83 |
| -82 | 5.3 | 0.0006 | 2.4490 | 1632.0 | 0.408 | 128.1 | 186.2 | 314.3 | 0.6892 | 1.6630 | -82 |
| -81 | 5.8 | 0.0006 | 2.2860 | 1629.0 | 0.437 | 129.0 | 185.7 | 314.7 | 0.6935 | 1.6600 | -81 |
| -80 | 6.2 | 0.0006 | 2.1360 | 1626.0 | 0.468 | 129.8 | 185.4 | 315.2 | 0.6978 | 1.6580 | -80 |
| -79 | 6.7 | 0.0006 | 1.9970 | 1624.0 | 0.501 | 130.6 | 185.1 | 315.7 | 0.7021 | 1.6550 | -79 |
| -78 | 7.1 | 0.0006 | 1.8680 | 1621.0 | 0.535 | 131.5 | 184.6 | 316.1 | 0.7064 | 1.6530 | -78 |
| -77 | 7.7 | 0.0006 | 1.7490 | 1618.0 | 0.572 | 132.3 | 184.3 | 316.6 | 0.7106 | 1.6500 | -77 |
| -76 | 8.2 | 0.0006 | 1.6390 | 1616.0 | 0.610 | 133.1 | 184.0 | 317.1 | 0.7149 | 1.6480 | -76 |
| -75 | 8.8 | 0.0006 | 1.5380 | 1613.0 | 0.650 | 134.0 | 183.5 | 317.5 | 0.7191 | 1.6450 | -75 |
| -74 | 9.4 | 0.0006 | 1.4430 | 1610.0 | 0.693 | 134.8 | 183.2 | 318.0 | 0.7233 | 1.6430 | -74 |
| -73 | 10.1 | 0.0006 | 1.3560 | 1608.0 | 0.738 | 135.6 | 182.9 | 318.5 | 0.7275 | 1.6410 | -73 |
| -72 | 10.8 | 0.0006 | 1.2740 | 1605.0 | 0.785 | 136.5 | 182.4 | 318.9 | 0.7317 | 1.6390 | -72 |
| -71 | 11.5 | 0.0006 | 1.1990 | 1602.0 | 0.834 | 137.3 | 182.1 | 319.4 | 0.7358 | 1.6370 | -71 |
| -70 | 12.3 | 0.0006 | 1.1290 | 1600.0 | 0.886 | 138.2 | 181.7 | 319.9 | 0.7400 | 1.6340 | -70 |
| -69 | 13.1 | 0.0006 | 1.0630 | 1597.0 | 0.941 | 139.0 | 181.3 | 320.3 | 0.7441 | 1.6320 | -69 |
| -68 | 14.0 | 0.0006 | 1.0020 | 1594.0 | 0.998 | 139.8 | 181.0 | 320.8 | 0.7482 | 1.6300 | -68 |
| -67 | 14.9 | 0.0006 | 0.9455 | 1591.0 | 1.058 | 140.7 | 180.6 | 321.3 | 0.7523 | 1.6280 | -67 |
| -66 | 15.8 | 0.0006 | 0.8925 | 1589.0 | 1.120 | 141.5 | 180.3 | 321.8 | 0.7564 | 1.6260 | -66 |
| -65 | 16.8 | 0.0006 | 0.8430 | 1586.0 | 1.186 | 142.4 | 179.8 | 322.2 | 0.7604 | 1.6250 | -65 |
| -64 | 17.9 | 0.0006 | 0.7968 | 1583.0 | 1.255 | 143.2 | 179.5 | 322.7 | 0.7645 | 1.6230 | -64 |
| -63 | 19.0 | 0.0006 | 0.7536 | 1581.0 | 1.327 | 144.1 | 179.1 | 323.2 | 0.7685 | 1.6210 | -63 |
| -62 | 20.1 | 0.0006 | 0.7132 | 1578.0 | 1.402 | 144.9 | 178.8 | 323.7 | 0.7726 | 1.6190 | -62 |
| -61 | 21.3 | 0.0006 | 0.6754 | 1575.0 | 1.481 | 145.8 | 178.3 | 324.1 | 0.7766 | 1.6170 | -61 |
| -60 | 22.6 | 0.0006 | 0.6399 | 1572.0 | 1.563 | 146.6 | 178.0 | 324.6 | 0.7806 | 1.6160 | -60 |
| -59 | 24.0 | 0.0006 | 0.6067 | 1570.0 | 1.648 | 147.5 | 177.6 | 325.1 | 0.7845 | 1.6140 | -59 |
| -58 | 25.4 | 0.0006 | 0.5755 | 1567.0 | 1.738 | 148.3 | 177.3 | 325.6 | 0.7885 | 1.6120 | -58 |
| -57 | 26.8 | 0.0006 | 0.5463 | 1564.0 | 1.831 | 149.2 | 176.8 | 326.0 | 0.7924 | 1.6110 | -57 |
| -56 | 28.4 | 0.0006 | 0.5188 | 1561.0 | 1.928 | 150.0 | 176.5 | 326.5 | 0.7964 | 1.6090 | -56 |
| -55 | 30.0 | 0.0006 | 0.4930 | 1559.0 | 2.029 | 150.9 | 176.1 | 327.0 | 0.8003 | 1.6080 | -55 |
| -54 | 31.6 | 0.0006 | 0.4687 | 1556.0 | 2.134 | 151.7 | 175.8 | 327.5 | 0.8042 | 1.6060 | -54 |
| -53 | 33.4 | 0.0006 | 0.4458 | 1553.0 | 2.243 | 152.6 | 175.4 | 328.0 | 0.8081 | 1.6050 | -53 |
| -52 | 35.2 | 0.0007 | 0.4243 | 1550.0 | 2.357 | 153.5 | 174.9 | 328.4 | 0.8120 | 1.6030 | -52 |
| -51 | 37.1 | 0.0007 | 0.4040 | 1548.0 | 2.475 | 154.3 | 174.6 | 328.9 | 0.8159 | 1.6020 | -51 |
| -50 | 39.1 | 0.0007 | 0.3849 | 1545.0 | 2.598 | 155.2 | 174.2 | 329.4 | 0.8197 | 1.6000 | -50 |
| -49 | 41.2 | 0.0007 | 0.3669 | 1542.0 | 2.725 | 156.0 | 173.9 | 329.9 | 0.8236 | 1.5990 | -49 |
| -48 | 43.4 | 0.0007 | 0.3499 | 1539.0 | 2.858 | 156.9 | 173.4 | 330.3 | 0.8274 | 1.5980 | -48 |
| -47 | 45.6 | 0.0007 | 0.3339 | 1536.0 | 2.995 | 157.8 | 173.0 | 330.8 | 0.8313 | 1.5960 | -47 |
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