modelAdair1972
Recip compressor correlation of Adair 1972
Extends from ThermoCycle.Components.Units.ExpansionAndCompressionMachines.Reciprocating.HeatTransfer.RePrHeatTransfer (Recip heat transfer based on Reynolds and Prandl number).
Information
Reference:
- (Adair1972)
- Adair, R.P., Qvale, E.B. & Pearson, J.T.
- Instantaneous Heat Transfer to the Cylinder Wall in Reciprocating Compressors
- Proceedings of the International Compressor Engineering Conference
- 1972(Paper 86), pp. 521-526
You can find the paper describing the correlation here: http://docs.lib.purdue.edu/icec/45
Implementation:
2013 for Technical University of Denmark, DTU Mechanical Engineering, Kongens Lyngby, Denmark by Jorrit Wronski (jowr@mek.dtu.dk)
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Integer | initialize (from PartialCylinderHeatTransfer) | 2 | 0: None, 1: High HTC, 2: Low HTC |
| Real | a (from RePrHeatTransfer) | 0.500 | Factor |
| Real | b (from RePrHeatTransfer) | 0.800 | Reynolds exponent |
| Real | c (from RePrHeatTransfer) | 0.600 | Prandl exponent |
| Boolean | inletTDC | true | admission at TDC (expander) or BDC (compressor) |
| Internal Interface | |||
| Integer | n (from PartialHeatTransfer) | 1 | Number of heat transfer segments |
| Boolean | use_k (from PartialHeatTransfer) | false | = true to use k value for thermal isolation |
| Ambient | |||
| SI.CoefficientOfHeatTransfer | k (from PartialHeatTransfer) | 0 | Heat transfer coefficient to ambient |
| SI.Temperature | T_ambient (from PartialHeatTransfer) | system.T_ambient | Ambient temperature |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Fluid.Interfaces.HeatPorts_a | heatPorts (from PartialHeatTransfer) | Heat port to component boundary |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Medium.ThermodynamicState | states (from PartialHeatTransfer) | Thermodynamic states of flow segments | |
| SI.Area | surfaceAreas (from PartialHeatTransfer) | Heat transfer areas | |
| SI.HeatFlowRate | Q_flows (from PartialHeatTransfer) | Heat flow rates | |
| Modelica.Fluid.System | system (from PartialHeatTransfer) | System wide properties | |
| Medium.Temperature | Ts (from PartialHeatTransfer) | Medium.temperature(states) | Temperatures defined by fluid states |
| Modelica.SIunits.Angle | crankshaftAngle (from PartialCylinderHeatTransfer) | ||
| Modelica.SIunits.Area | pistonCrossArea (from PartialCylinderHeatTransfer) | ||
| Modelica.SIunits.Length | strokeLength (from PartialCylinderHeatTransfer) | ||
| Modelica.SIunits.CoefficientOfHeatTransfer | h (from PartialCylinderHeatTransfer) | ||
| Modelica.SIunits.HeatFlux | q_w (from PartialCylinderHeatTransfer) | Heat flux from wall | |
| Modelica.SIunits.Velocity | c_c (from PartialCylinderHeatTransfer) | Current piston speed | |
| Modelica.SIunits.Velocity | c_m (from PartialCylinderHeatTransfer) | Mean piston speed | |
| Modelica.SIunits.Angle | theta (from PartialCylinderHeatTransfer) | Crankshaft angle | |
| Modelica.SIunits.AngularVelocity | omega_c (from PartialCylinderHeatTransfer) | Current angular crank velocity | |
| Modelica.SIunits.AngularVelocity | omega_m (from PartialCylinderHeatTransfer) | Mean angular crank velocity | |
| Modelica.SIunits.Length | bore (from PartialCylinderHeatTransfer) | ||
| Modelica.SIunits.Length | stroke (from PartialCylinderHeatTransfer) | ||
| Modelica.SIunits.Length | position (from PartialCylinderHeatTransfer) | Clearance from cyl. head | |
| Modelica.SIunits.Length | position_m (from PartialCylinderHeatTransfer) | Mean clearance from cyl. head | |
| Real | HTC_gain (from PartialCylinderHeatTransfer) | Amplifier for h[i] | |
| Modelica.SIunits.Length | Gamma (from RePrHeatTransfer) | Characteristic length | |
| Modelica.SIunits.Velocity | Lambda (from RePrHeatTransfer) | Characteristic velocity | |
| Modelica.SIunits.ReynoldsNumber | Re (from RePrHeatTransfer) | ||
| Modelica.SIunits.PrandtlNumber | Pr (from RePrHeatTransfer) | ||
| Modelica.SIunits.NusseltNumber | Nu (from RePrHeatTransfer) | ||
| Modelica.SIunits.ThermalConductivity | lambda (from RePrHeatTransfer) | ||
| Modelica.SIunits.DynamicViscosity | eta (from RePrHeatTransfer) | ||
| Modelica.SIunits.Length | De | Equivalent diameter 6V/A | |
| Modelica.SIunits.AngularVelocity | omega_g | Swirl velocity | |
| Modelica.SIunits.Volume | volume | Cylinder volume | |
| Real[n] | tFactor | ||
| Real[n] | tFactor1 | ||
| Real[n] | tFactor2 | Transition factor | |
| Real | deltaTheta | Transition interval |