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>
109 lines
5.5 KiB
Markdown
109 lines
5.5 KiB
Markdown
**Technical Information**
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## l T-12 SI
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DuPont Fluorochemicals
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#### Thermodynamic Properties
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**of**
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®
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# Freon 12
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**(R-12)** **Technical Information** **Technical Information**
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**®** **Thermodynamic Properties of Freon 12 Refrigerant** **(R-12)** **SI Units**
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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,
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S.A., Lemmon, E.W., and Peskin, Vf = Fluid (liquid) specific volume
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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
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H = Enthalpy (kJ/kg)
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S = Entropy (kJ/kg.K)
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**Physical Properties**
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Chemical Formula CCl2F2
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Molecular mass 120.91
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Boiling Point-29.75°C At one atmosphere
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Critical Temperature 111.97°C
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Critical Pressure 4136 kPa
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3 Critical Density 565.0 kg/m
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Critical Volume 0.0018 m /kg
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l
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**TABLE 1**
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**Freon** **®** **12 Saturation Properties-Temperature Table**
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|Temp|Pressure|Volume||Density|||Enthalpy||Entropy||Temp|
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|°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|
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|-100|1.2|0.0006|10.0000|1679.0|0.100|113.3|192.8|306.1|0.6077|1.7210|-100|
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|-99|1.3|0.0006|9.1670|1677.0|0.109|114.1|192.4|306.5|0.6124|1.7170|-99|
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|-98|1.4|0.0006|8.4100|1674.0|0.119|115.0|192.0|307.0|0.6171|1.7130|-98|
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|-97|1.6|0.0006|7.7250|1671.0|0.129|115.8|191.6|307.4|0.6218|1.7100|-97|
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|-96|1.7|0.0006|7.1040|1669.0|0.141|116.6|191.3|307.9|0.6264|1.7060|-96|
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|-95|1.9|0.0006|6.5400|1666.0|0.153|117.4|190.9|308.3|0.6310|1.7030|-95|
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|-94|2.0|0.0006|6.0270|1663.0|0.166|118.2|190.6|308.8|0.6356|1.6990|-94|
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|-93|2.2|0.0006|5.5610|1661.0|0.180|119.1|190.1|309.2|0.6402|1.6960|-93|
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|-92|2.4|0.0006|5.1360|1658.0|0.195|119.9|189.8|309.7|0.6448|1.6920|-92|
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|-91|2.6|0.0006|4.7480|1655.0|0.211|120.7|189.4|310.1|0.6493|1.6890|-91|
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|-90|2.9|0.0006|4.3950|1653.0|0.228|121.5|189.1|310.6|0.6538|1.6860|-90|
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|-89|3.1|0.0006|4.0720|1650.0|0.246|122.4|188.6|311.0|0.6583|1.6830|-89|
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|-88|3.4|0.0006|3.7760|1648.0|0.265|123.2|188.3|311.5|0.6628|1.6800|-88|
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|-87|3.6|0.0006|3.5050|1645.0|0.285|124.0|188.0|312.0|0.6672|1.6770|-87|
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|-86|3.9|0.0006|3.2570|1642.0|0.307|124.8|187.6|312.4|0.6716|1.6740|-86|
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|-85|4.3|0.0006|3.0290|1640.0|0.330|125.7|187.2|312.9|0.6761|1.6710|-85|
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|-84|4.6|0.0006|2.8190|1637.0|0.355|126.5|186.8|313.3|0.6804|1.6680|-84|
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|-83|5.0|0.0006|2.6270|1634.0|0.381|127.3|186.5|313.8|0.6848|1.6660|-83|
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|-82|5.3|0.0006|2.4490|1632.0|0.408|128.1|186.2|314.3|0.6892|1.6630|-82|
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|-81|5.8|0.0006|2.2860|1629.0|0.437|129.0|185.7|314.7|0.6935|1.6600|-81|
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|-80|6.2|0.0006|2.1360|1626.0|0.468|129.8|185.4|315.2|0.6978|1.6580|-80|
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|-79|6.7|0.0006|1.9970|1624.0|0.501|130.6|185.1|315.7|0.7021|1.6550|-79|
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|-78|7.1|0.0006|1.8680|1621.0|0.535|131.5|184.6|316.1|0.7064|1.6530|-78|
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|-77|7.7|0.0006|1.7490|1618.0|0.572|132.3|184.3|316.6|0.7106|1.6500|-77|
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|-76|8.2|0.0006|1.6390|1616.0|0.610|133.1|184.0|317.1|0.7149|1.6480|-76|
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|-75|8.8|0.0006|1.5380|1613.0|0.650|134.0|183.5|317.5|0.7191|1.6450|-75|
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|-74|9.4|0.0006|1.4430|1610.0|0.693|134.8|183.2|318.0|0.7233|1.6430|-74|
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|-73|10.1|0.0006|1.3560|1608.0|0.738|135.6|182.9|318.5|0.7275|1.6410|-73|
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|-72|10.8|0.0006|1.2740|1605.0|0.785|136.5|182.4|318.9|0.7317|1.6390|-72|
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|-71|11.5|0.0006|1.1990|1602.0|0.834|137.3|182.1|319.4|0.7358|1.6370|-71|
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|-70|12.3|0.0006|1.1290|1600.0|0.886|138.2|181.7|319.9|0.7400|1.6340|-70|
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|-69|13.1|0.0006|1.0630|1597.0|0.941|139.0|181.3|320.3|0.7441|1.6320|-69|
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|-68|14.0|0.0006|1.0020|1594.0|0.998|139.8|181.0|320.8|0.7482|1.6300|-68|
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|-67|14.9|0.0006|0.9455|1591.0|1.058|140.7|180.6|321.3|0.7523|1.6280|-67|
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|-66|15.8|0.0006|0.8925|1589.0|1.120|141.5|180.3|321.8|0.7564|1.6260|-66|
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|-65|16.8|0.0006|0.8430|1586.0|1.186|142.4|179.8|322.2|0.7604|1.6250|-65|
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|-64|17.9|0.0006|0.7968|1583.0|1.255|143.2|179.5|322.7|0.7645|1.6230|-64|
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|-63|19.0|0.0006|0.7536|1581.0|1.327|144.1|179.1|323.2|0.7685|1.6210|-63|
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|-62|20.1|0.0006|0.7132|1578.0|1.402|144.9|178.8|323.7|0.7726|1.6190|-62|
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|-61|21.3|0.0006|0.6754|1575.0|1.481|145.8|178.3|324.1|0.7766|1.6170|-61|
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|-60|22.6|0.0006|0.6399|1572.0|1.563|146.6|178.0|324.6|0.7806|1.6160|-60|
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|-59|24.0|0.0006|0.6067|1570.0|1.648|147.5|177.6|325.1|0.7845|1.6140|-59|
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|-58|25.4|0.0006|0.5755|1567.0|1.738|148.3|177.3|325.6|0.7885|1.6120|-58|
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|-57|26.8|0.0006|0.5463|1564.0|1.831|149.2|176.8|326.0|0.7924|1.6110|-57|
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|-56|28.4|0.0006|0.5188|1561.0|1.928|150.0|176.5|326.5|0.7964|1.6090|-56|
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|-55|30.0|0.0006|0.4930|1559.0|2.029|150.9|176.1|327.0|0.8003|1.6080|-55|
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|-54|31.6|0.0006|0.4687|1556.0|2.134|151.7|175.8|327.5|0.8042|1.6060|-54|
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|-53|33.4|0.0006|0.4458|1553.0|2.243|152.6|175.4|328.0|0.8081|1.6050|-53|
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|-52|35.2|0.0007|0.4243|1550.0|2.357|153.5|174.9|328.4|0.8120|1.6030|-52|
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|-51|37.1|0.0007|0.4040|1548.0|2.475|154.3|174.6|328.9|0.8159|1.6020|-51|
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|-50|39.1|0.0007|0.3849|1545.0|2.598|155.2|174.2|329.4|0.8197|1.6000|-50|
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|-49|41.2|0.0007|0.3669|1542.0|2.725|156.0|173.9|329.9|0.8236|1.5990|-49|
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|-48|43.4|0.0007|0.3499|1539.0|2.858|156.9|173.4|330.3|0.8274|1.5980|-48|
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|-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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**f g f g f** fg **g f g**
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