Isolated Pipe
Pipe without heat exchange
Description
Equations
Variables
Connections
Parameters
Modelica Standard Library
The Isolated Pipe component is a two-port thermal-fluid component that models a pipe with friction loss, head loss, and no heat exchange with the ambient.
The Medium parameter specifies the name of a Thermal-Fluid Media record, which must be in the model at the same or higer level.
The Use default medium boolean parameter, when true, sets the name of the Medium parameter to fluidMedium1, which corresponds to the default name of a fluid medium record. To use a different name, uncheck the box and enter the name in the parameter input that appears.
pdrop=Δplam⁢VflowVflowlam+{+k⁢Vflow−Vflowlam2Vflowlam<Vflow−k⁢Vflow+Vflowlam2Vflow<−Vflowlam0otherwise
h=cp⁢T
Δp=hg⁢ρ⁢gn+pdrop
Qflow=Qfriction
Qfriction=fL⁢Vflow⁢pdrop
Tq=T
Name
Units
Modelica ID
Qflow
W
Heat exchange with ambient
Q_flow
T
K
Outlet temperature of medium
Ta
Temperature at flowPort_a
T_a
Tb
Temperature at flowPort_b
T_b
Δp
Pa
Pressure drop a->b
dp
pdrop
pressureDrop
Qfriction
Q_friction
ΔT
Temperature increase of coolant in flow direction
dT
Vflow
m3s
Volume flow a->b
V_flow
flowPorta
Thermal-Fluid flow port
flowPort_a
flowPortb
flowPort_b
Default
fix T0
false
True (checked) means T0 is enforced, otherwise it is a guess
T0fixed
fL
0
1
Part of friction losses fed to medium
frictionLoss
hg
m
Geodetic height (height difference from flowPort_a to flowPort_b)
h_g
kg
Mass of medium
medium
fluidMedium
Thermal-Fluid Media
Δplam
0.1
Laminar pressure drop
dpLaminar
Δpnom
Nominal pressure drop
dpNominal
T0
293.15
Initial temperature of medium
Vflowlam
Laminar volume flow
V_flowLaminar
Vflownom
Nominal volume flow
V_flowNominal
The component described in this topic is from the Modelica Standard Library. To view the original documentation, which includes author and copyright information, click here.
See Also
Pipes and Valves
Thermal Overview
Download Help Document