Calculation of mean convective heat transfer coefficient kc of a straight pipe at an uniform wall temperature or uniform heat flux and for a hydrodynamically developed or undeveloped laminar fluid flow. See more information.
Calculation of mean convective heat transfer coefficient kc of a straight pipe for a hydrodynamically developed turbulent fluid flow at uniform wall temperature or See more information.
Extends from Modelica.Icons.VariantsPackage (Icon for package containing variants).
Name | Description |
---|---|
kc_laminar | Mean heat transfer coefficient of straight pipe | uniform wall temperature or uniform heat flux | hydrodynamically developed or undeveloped laminar flow regime |
kc_laminar_KC | Mean heat transfer coefficient of straight pipe | uniform wall temperature or uniform heat flux | hydrodynamically developed or undeveloped laminar flow regime |
kc_laminar_IN_con | Input record for function kc_laminar and kc_laminar_KC |
kc_laminar_IN_var | Input record for function kc_laminar and kc_laminar_KC |
kc_overall | Mean heat transfer coefficient of straight pipe | uniform wall temperature or uniform heat flux | hydrodynamically developed or undeveloped overall flow regime| pressure loss dependence |
kc_overall_KC | Mean heat transfer coefficient of straight pipe | uniform wall temperature or uniform heat flux | hydrodynamically developed or undeveloped overall flow regime| pressure loss dependence |
kc_overall_IN_con | Input record for function kc_overall and kc_overall_KC |
kc_overall_IN_var | Input record for function kc_overall and kc_overall_KC |
kc_turbulent | Mean heat transfer coefficient of straight pipe | hydrodynamically developed turbulent flow regime | pressure loss dependence |
kc_turbulent_KC | Mean heat transfer coefficient of straight pipe | hydrodynamically developed turbulent flow regime | pressure loss dependence |
kc_turbulent_IN_con | Input record for function kc_turbulent and kc_turbulent_KC |
kc_turbulent_IN_var | Input record for function kc_turbulent and kc_turbulent_KC |
kc_twoPhaseOverall_KC | Local two phase heat transfer coefficient of straight pipe | horizontal or vertical boiling | horizontal condensation |
kc_twoPhaseOverall_KC_IN_con | Input record for function kc_twoPhaseOverall_KC |
kc_twoPhaseOverall_KC_IN_var | Input record for function kc_twoPhaseOverall_KC |
Mean heat transfer coefficient of straight pipe | uniform wall temperature or uniform heat flux | hydrodynamically developed or undeveloped laminar flow regime
Calculation of mean convective heat transfer coefficient kc of a straight pipe at an uniform wall temperature or uniform heat flux and for a hydrodynamically developed or undeveloped laminar fluid flow. Note that additionally a failure status is observed in this function to check if the intended boundary conditions are fulfilled. See more information .
Extends from Modelica.Icons.Function (Icon for functions).
Name | Description |
---|---|
Constant inputs | |
IN_con | Input record for function kc_laminar |
Variable inputs | |
IN_var | Input record for function kc_laminar |
Name | Description |
---|---|
Output | |
kc | Convective heat transfer coefficient [W/(m2.K)] |
Pr | Prandtl number [1] |
Re | Reynolds number [1] |
Nu | Nusselt number [1] |
failureStatus | 0== boundary conditions fulfilled | 1== failure >> check if still meaningful results |
Mean heat transfer coefficient of straight pipe | uniform wall temperature or uniform heat flux | hydrodynamically developed or undeveloped laminar flow regime
Calculation of mean convective heat transfer coefficient kc of a straight pipe at an uniform wall temperature or uniform heat flux and for a hydrodynamically developed or undeveloped laminar fluid flow. See more information .
Extends from Modelica.Icons.Function (Icon for functions).
Name | Description |
---|---|
Constant inputs | |
IN_con | Input record for function kc_laminar_KC |
Variable inputs | |
IN_var | Input record for function kc_laminar_KC |
Name | Description |
---|---|
kc | Output for function kc_laminar_KC [W/(m2.K)] |
Input record for function kc_laminar and kc_laminar_KC
This record is used as input record for the heat transfer function kc_laminar and kc_laminar_KC.
Extends from Utilities.Records.HeatTransfer.StraightPipe (Input for straight pipe).
Name | Description |
---|---|
Straight pipe | |
d_hyd | Hydraulic diameter [m] |
L | Length [m] |
Choices | |
target | Choice of heat transfer boundary condition |
Input record for function kc_laminar and kc_laminar_KC
This record is used as input record for the heat transfer function kc_laminar and kc_laminar_KC.
Extends from Modelica.Fluid.Dissipation.HeatTransfer.StraightPipe.kc_overall_IN_var (Input record for function kc_overall and kc_overall_KC).
Name | Description |
---|---|
Fluid properties | |
cp | Specific heat capacity of fluid at constant pressure [J/(kg.K)] |
eta | Dynamic viscosity of fluid [Pa.s] |
lambda | Thermal conductivity of fluid [W/(m.K)] |
rho | Density of fluid [kg/m3] |
Input | |
m_flow | [kg/s] |
Mean heat transfer coefficient of straight pipe | uniform wall temperature or uniform heat flux | hydrodynamically developed or undeveloped overall flow regime| pressure loss dependence
Calculation of mean convective heat transfer coefficient kc of a straight pipe at an uniform wall temperature or uniform heat flux and for a hydrodynamically developed or undeveloped overall fluid flow with neglect or consideration of pressure loss influence. Note that additionally a failure status is observed in this function to check if the intended boundary conditions are fulfilled. See more information .
Extends from Modelica.Icons.Function (Icon for functions).
Name | Description |
---|---|
Constant inputs | |
IN_con | Input record for function kc_overall |
Variable inputs | |
IN_var | Input record for function kc_overall |
Name | Description |
---|---|
Output | |
kc | Convective heat transfer coefficient [W/(m2.K)] |
Pr | Prandtl number [1] |
Re | Reynolds number [1] |
Nu | Nusselt number [1] |
failureStatus | 0== boundary conditions fulfilled | 1== failure >> check if still meaningful results |
Mean heat transfer coefficient of straight pipe | uniform wall temperature or uniform heat flux | hydrodynamically developed or undeveloped overall flow regime| pressure loss dependence
Calculation of mean convective heat transfer coefficient kc of a straight pipe at an uniform wall temperature or uniform heat flux and for a hydrodynamically developed or undeveloped overall fluid flow with neglect or consideration of pressure loss influence.See more information .
Extends from Modelica.Icons.Function (Icon for functions).
Name | Description |
---|---|
Constant inputs | |
IN_con | Input record for function kc_overall_KC |
Variable inputs | |
IN_var | Input record for function kc_overall_KC |
Name | Description |
---|---|
kc | Output for function kc_overall_KC [W/(m2.K)] |
Input record for function kc_overall and kc_overall_KC
Extends from kc_turbulent_IN_con (Input record for function kc_turbulent and kc_turbulent_KC).
Name | Description |
---|---|
Choices | |
target | Choice of heat transfer boundary condition |
roughness | Choice of considering surface roughness |
Straight pipe | |
d_hyd | Hydraulic diameter [m] |
L | Length [m] |
K | Roughness (average height of surface asperities) [m] |
Input record for function kc_overall and kc_overall_KC
Extends from Modelica.Fluid.Dissipation.Utilities.Records.General.FluidProperties (Base record for fluid properties).
Name | Description |
---|---|
Fluid properties | |
cp | Specific heat capacity of fluid at constant pressure [J/(kg.K)] |
eta | Dynamic viscosity of fluid [Pa.s] |
lambda | Thermal conductivity of fluid [W/(m.K)] |
rho | Density of fluid [kg/m3] |
Input | |
m_flow | [kg/s] |
Mean heat transfer coefficient of straight pipe | hydrodynamically developed turbulent flow regime | pressure loss dependence
Calculation of mean convective heat transfer coefficient kc of a straight pipe for a hydrodynamically developed turbulent fluid flow at uniform wall temperature or uniform heat flux with neglecting or considering of pressure loss influence. Note that additionally a failure status is observed in this function to check if the intended boundary conditions are fulfilled. See more information .
Extends from Modelica.Icons.Function (Icon for functions).
Name | Description |
---|---|
Constant inputs | |
IN_con | Input record for function kc_turbulent |
Variable inputs | |
IN_var | Input record for function kc_turbulent |
Name | Description |
---|---|
Output | |
kc | Convective heat transfer coefficient [W/(m2.K)] |
Pr | Prandtl number [1] |
Re | Reynolds number [1] |
Nu | Nusselt number [1] |
failureStatus | 0== boundary conditions fulfilled | 1== failure >> check if still meaningful results |
Mean heat transfer coefficient of straight pipe | hydrodynamically developed turbulent flow regime | pressure loss dependence
Calculation of mean convective heat transfer coefficient kc of a straight pipe for a hydrodynamically developed turbulent fluid flow at uniform wall temperature or uniform heat flux with neglecting or considering of pressure loss influence. See more information .
Extends from Modelica.Icons.Function (Icon for functions).
Name | Description |
---|---|
Constant inputs | |
IN_con | Input record for function kc_turbulent_KC |
Variable inputs | |
IN_var | Input record for function kc_turbulent_KC |
Name | Description |
---|---|
kc | Output for function kc_turbulent_KC [W/(m2.K)] |
Input record for function kc_turbulent and kc_turbulent_KC
Extends from Utilities.Records.HeatTransfer.StraightPipe (Input for straight pipe).
Name | Description |
---|---|
Straight pipe | |
d_hyd | Hydraulic diameter [m] |
L | Length [m] |
K | Roughness (average height of surface asperities) [m] |
Choices | |
roughness | Choice of considering surface roughness |
Input record for function kc_turbulent and kc_turbulent_KC
Extends from Modelica.Fluid.Dissipation.HeatTransfer.StraightPipe.kc_overall_IN_var (Input record for function kc_overall and kc_overall_KC).
Name | Description |
---|---|
Fluid properties | |
cp | Specific heat capacity of fluid at constant pressure [J/(kg.K)] |
eta | Dynamic viscosity of fluid [Pa.s] |
lambda | Thermal conductivity of fluid [W/(m.K)] |
rho | Density of fluid [kg/m3] |
Input | |
m_flow | [kg/s] |
Local two phase heat transfer coefficient of straight pipe | horizontal or vertical boiling | horizontal condensation
Calculation of local two phase heat transfer coefficient kc_2ph for (horizontal/vertical) boiling or (horizontal) condensation for an overall flow regime. See more information .
Extends from Modelica.Icons.Function (Icon for functions).
Name | Description |
---|---|
Constant inputs | |
IN_con | |
Variable inputs | |
IN_var |
Name | Description |
---|---|
kc | Local two phase heat transfer coefficient [W/(m2.K)] |
Input record for function kc_twoPhaseOverall_KC
Extends from Modelica.Fluid.Dissipation.Utilities.Records.HeatTransfer.TwoPhaseFlowHT_IN_con (Base record for two phase heat transfer coefficient).
Name | Description |
---|---|
Choices | |
target | Choice of (horizontal/vertical) boiling or (horizontal) condensation in pipe |
Geometry | |
A_cross | Cross sectional area [m2] |
perimeter | Wetted perimeter [m] |
Fluid properties | |
MM | Molar mass of fluid [g/mol] |
p_crit | Critical pressure of fluid [Pa] |
Input record for function kc_twoPhaseOverall_KC
Extends from Modelica.Fluid.Dissipation.Utilities.Records.HeatTransfer.TwoPhaseFlowHT_IN_var (Base record for two phase heat transfer coefficient).
Name | Description |
---|---|
Choices | |
target | Choice of (horizontal/vertical) boiling or (horizontal) condensation in pipe |
Fluid properties | |
cp_l | Specific heat capacity of liquid [J/(kg.K)] |
lambda_l | Thermal conductivity of liquid [W/(m.K)] |
rho_g | Density of gas [kg/m3] |
rho_l | Density of liquid [kg/m3] |
eta_g | Dynamic viscosity of gas [Pa.s] |
eta_l | Dynamic viscosity of liquid [Pa.s] |
pressure | Mean pressure of fluid [Pa] |
dh_lg | Evaporation enthalpy of fluid [J/kg] |
Input | |
m_flow | Mass flow rate [kg/s] |
qdot_A | Heat flux at boiling [W/m2] |
x_flow | Mass flow rate quality |