COMPUTERCALCULATION OF PRESSURELOSSES
Example of report
Date: 2010-03-05 /Time: 13:06:17
Computerprogram; Processline.0911/Windows from MATEMATICA
Tel: +46-(0)708-387910, e-mail: mail@matematica.se
copyright (c) 1995,2009 Stefan Rudbäck, Matematica, Sweden
Calculation done by Matematica
__________________INPUT______________________
Media: O2/Gas
Temperature? (at inlet)______________________________(C) 30
Static Pressure? (at inlet)_______________________(BarG) 4
Relative humidity (at operating conditions)?_________(%) 0
Tubelength?__________________________________________(m) 7,7
Interior tubediameter cold (=20 C)?_________________(mm) 163,1
Pipe roughness k?___________________________________(mm) 0,05
Inlet-flow?_______________________________________(kg/h) 6000
Adiabatic flow (=isolated tube => Inlet Temp<>Outlet Temp)
=================================RESISTANCES=====================================
Nr_________________________________1_________________________________2
Resistancetype?____________________90 degrees bends:12.Bendradius 2D_31.Abrupt reduced tubesize
Resistance=________________________0,3000____________________________0,3496
(m) after Inlet?___________________1_________________________________2
Pressureloss %=____________________0,0298____________________________0,0348
, mbar=____________________________1,4961____________________________1,7443
New tubesize (mm) ?__________________________________________________100
__________________OUTPUT_____________________
------------------------TOTAL--------------------------
Resistance________________________________________= 1,4095
Pressurereduction (reversible+irreversible)__(kPa)= 8,2084
Pressurereduction___________________________(mbar)= 82,084
Pressurereduction_____________(% of inletpressure)= 1,6373
Pressureloss (irreversible)__________________(kPa)= 3,9187
Outletpress. (bar)=4,9312____________________(kPa)= 493,12
Outlettemperature______________________________(C)= 29,462
Outlet Flowspeed in tube (at maxflow)________(m/s)= 33,746
________________PHYSICS REPORT (AT TUBE INLET)_____________
Density____________________________________(kg/m3)= 6,3817
Dynamic viscosity________________________(Pas*E-6)= 20,956
Reynolds number (at maximal flow)_________________= 1,014E6
Datum: 2010-03-05 /Tid: 12:46:14
Computerprogram; Processline.0911/Windows från MATEMATICA
Tel: +46-(0)708-387910, e-mail: mail@matematica.se
copyright (c) 1995,2009 Stefan Rudbäck, Matematica, Sweden
Beräkning utförd av Matematica
__________________INDATA_____________________
Media: O2/Gas
Temperatur? (vid inlopp)_____________________________(C) 30
Statiskt Tryck? (vid inlopp)______________________(BarG) 4
Relativ fuktighet (vid drifttillstånd)?______________(%) 0
Längd på rörledning?_________________________________(m) 7,7
Invändig rördiameter, kall (=20 C)?_________________(mm) 163,1
Genomsnittlig rörråhet k?___________________________(mm) 0,05
Inloppsflöde?_____________________________________(kg/h) 6000
Adiabatiskt flöde (=isolerat rör => Inloppstemp<>Utloppstemp)
=================================PUNKTMOTSTÅND===================================
Nr_____________________________1______________________________2
Motståndstyp?__________________90 graders böj:12.Böjradie 2D__31.Abrupt rördiameterminskning
Motståndstal=__________________0,3000_________________________0,3496
(m) efter inlopp_______________1______________________________2
Tryckförlust %=________________0,0298_________________________0,0348
, mbar=________________________1,4961_________________________1,7443
Ny rördiameter (mm) ?_________________________________________100
__________________UTDATA_____________________
_________________________TOTALT____________________________
Motståndstal______________________________________= 1,4095
Tryckminskning (reversibel+irreversibel)_____(kPa)= 8,2084
Tryckminskning______________________________(mbar)= 82,084
Tryckminskning_________________(% av inloppstryck)= 1,6373
Tryckförlust (irreversibel)__________________(kPa)= 3,9187
Utloppstryck (bar)=4,9312____________________(kPa)= 493,12
Utloppstemperatur______________________________(C)= 29,462
Flödeshastighet i rörutlopp (vid maxflöde)___(m/s)= 33,746
________________FYSIKRAPPORT (VID RÖRINLOPP)_______________
Densitet___________________________________(kg/m3)= 6,3817
Dynamisk viskositet______________________(Pas*E-6)= 20,956
Reynolds tal (vid maxflöde)_______________________= 1,014E6
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