Part 44 (2/2)
K = 0026 for steam (Carpenter at Oriskany)
K = 0027 for steam (G H Babcock)
The value 0027 is apparently the ives,
/ 36 w{2} L p = 0000131 | 1 + ---- | ----------- (44) d_{1}/ D d_{1}{5}
/ pDd_{1}{5} w = 87 | -------------- |{} (45) | / 36 | | | 1 + ---- | L | d_{1}/ /
Where w = the weight of stea in pounds per minute, p = the difference in pressure between the two ends of the pipe in pounds per square inch, D = density of steaht per cubic foot,[80]
d_{1} = internal diath of pipe in feet
TABLE 66
FLOW OF STEAM THROUGH PIPES +---------------------------------------------------------------------------------------+ |Initl|Diath of Pipe = 240 Diae|---------------------------------------------------------------------------------+ |Press| | 1 | 1 | 2 | 2 | 3 | 4 | 5 | 6 | 8 | 10 | 12 | 15 | 18 | |Pound|---------------------------------------------------------------------------------+ |/SqIn| Weight of Steam per Minute, in Pounds, With One Pound Loss of Pressure | +-----+---------------------------------------------------------------------------------+ | 1 |116|207| 57|1027|1545|2538| 4685| 773|1159|2114| 3411| 5024| 804|1177| | 10 |144|257| 71|1272|1915|3145| 5805| 958|1436|2620| 4227| 6225| 996|1458| | 20 |170|302| 83|1494|2249|3694| 6820|1126|1687|3078| 4965| 7313|1170|1713| | 30 |191|340| 94|1684|2535|4163| 7684|1269|1901|3468| 5595| 8241|1318|1930| | 40 |210|374|103|1851|2787|4577| 8449|1395|2090|3813| 6153| 9060|1450|2122| | 50 |227|404|112|2001|3013|4948| 9134|1508|2260|4122| 6650| 9795|1567|2294| | 60 |243|432|119|2138|3219|5287| 9760|1611|2415|4405| 7106|10467|1675|2451| | 70 |257|458|126|2265|3410|5600|10337|1707|2558|4665| 7527|11085|1774|2596| | 80 |271|482|133|2382|3587|5891|10874|1795|2690|4907| 7917|11661|1866|2731| | 90 |283|504|139|2492|3752|6162|11374|1878|2814|5133| 8281|12198|1951|2856| | 100 |295|525|145|2596|3907|6418|11847|1956|2931|5346| 8626|12701|2032|2975| | 120 |316|563|155|2785|4193|6887|12712|2099|3145|5737| 9256|13633|2181|3193| | 150 |345|614|170|3037|4572|7509|13861|2288|3430|6255|10092|14865|2378|3481| +---------------------------------------------------------------------------------------+
This forenerally accepted for the flow of steaives the ah straight sth of 240 diameters from various initial pressures with one pound difference between the initial and final pressures
To apply this table for other lengths of pipe and pressure losses other than those assuth and d the diameter of the pipe, both in inches; l, the loss in pounds; Q, the weight under the conditions assued conditions
For any length of pipe, if the weight of steaiven in the table, the loss will be,
L l = ---- (46) 240d
If the pipe length is the same as assumed in the table but the loss is different, the quantity of stea per minute will be,
Q_{1} = Ql{} (47)
For any assuht will be,
/240dl Q_{1} = Q|-----|{} (48) L /
TABLE 67
FLOW OF STEAM THROUGH PIPES LENGTH OF PIPE 1000 FEET
+--------------------------------------------------++----------------------------------------+ | Discharge in Pounds per Minute corresponding to || Drop in Pressure in | | Drop in Pressure on Right for Pipe Dia | | in Inches in Top Line || to Discharge on Left: Densities | | || and corresponding Absolute Pressures | | || per Square Inch in First Two Lines | +--------------------------------------------------++----------------------------------------+ | Diae || Density--Pressure--Drop | +--------------------------------------------------++----------------------------------------+ | 12 | 10 | 8 | 6 | 4 | 3 | 2| 2 | 1| 1 ||208 |230|284|328|401|443|506|548| | In | In | In | In | In | In | In | In | In | In || 90 | 100| 125| 150| 180| 200| 230| 250| +--------------------------------------------------++-------+--------------------------------+ |2328|1443| 799| 371|123 |559|288|181|681|252||1810|164|133|111|939|850|744|687| |2165|1341| 742| 344|1146|519|276|168|652|234||1560|141|114|960|809|733|641|592| |1996|1237| 685| 318|1060|479|264|155|624|216||133 |120|974|818|690|624|547|505| |1830|1134| 628| 292| 970|439|252|142|595|198||111 |100|813|683|576|521|456|421| |1663|1031| 571| 265| 882|399|240|129|567|180|| 925|836|678|569|480|434|380|351| |1580| 979| 542| 252| 838|379|228|123|529|171|| 833|753|610|513|432|391|342|316| |1497| 928| 514| 239| 794|359|216|116|500|162|| 748|676|548|460|388|351|307|284| |1414| 876| 485| 226| 750|339|204|109|472|153|| 667|603|488|410|346|313|274|253| |1331| 825| 457| 212| 706|319|192|103|443|144|| 591|535|433|364|307|278|243|224| |1248| 873| 428| 199| 662|239|180|968|415|135|| 519|469|380|319|269|244|213|197| |1164| 722| 400| 186| 617|279|168|903|386|126|| 452|409|331|278|234|212|186|172| |1081| 670| 371| 172| 573|259|156|838|368|117|| 390|353|286|240|202|183|160|148| | 998| 619| 343| 159| 529|239|144|774|340|108|| 332|300|243|204|172|156|136|126| | 915| 567| 314| 146| 485|219|132|710|311|099|| 279|252|204|172|145|131|115|106| | 832| 516| 286| 132| 441|200|120|645|283|090|| 231|209|169|142|120|108|949|877| | 748| 464| 257| 119| 397|180|108|581|255|081|| 187|169|137|115| 97|878|769|710| | 665| 412| 228| 106| 353|160| 96|516|226|072|| 147|133|108|905|762|690|604|558| | 582| 361| 200|928| 309|140| 84|452|198|063|| 113|102|828|695|586|531|456|429| +--------------------------------------------------++----------------------------------------+
To get the pressure drop for lengths other than 1000 feet, ht of steae pressure, which will pass through a 6-inch pipe 720 feet long with a pressure drop of 4 pounds Under the conditions assumed in the table, 2931 pounds would flow per minute; hence, Q = 2931, and
_ _ | 24064 | Q_{1} = 2931 | ------- |{} = 2399 pounds |_ 72012_|
Table 67the flow of steam This table was calculated by Mr E C Sickles for a pipe 1000 feet long from formula (45), except that from the use of a value of the constant K = 0026 instead of 0027, the constant in the for this table, the pressures and densities to be considered, as given at the top of the right-hand portion, are the mean of the initial and final pressures and densities Its use is as follows: assuth of pipe Froht-hand column under the column of mean pressure, as determined by the initial and final pressures, pass to the left-hand portion of the table along the sa to the flow required The size of the pipe at the head of this column is that which will carry the required amount of steam with the assumed pressure drop