COMPONENTS

IncompressibleFlowValve(; name)

• DESCRIPTION:

  A flow valve object with a mass flow variable. Can be controlled with an external controller element.
  @named p = IncompressiblePin()
  @named n = IncompressiblePin()
  sts = @variables ṁ(t) = 1.0

• INPUTS:

  • - `name`: Name of the system, symbol. Or use the @named macro when initializing.

• EQUATIONS:

  \[ 0 = p.Φ + n.Φ \] \[ 0 = p.ṁ + n.ṁ\] \[ p.ṁ = ṁ\] \[ p.T = n.T\] \[ n.P = p.P\] \[ \]

IncompressibleFixedFlowSource(; name, Ṁ = 1.0)

• DESCRIPTION:

  A fixed flow rate source
  @named p = IncompressiblePin()
  @named n = IncompressiblePin()
  ps = @parameters Ṁ = Ṁ

• INPUTS:

  • - `name`: Name of the system, symbol. Or use the @named macro when initializing.
  • - `Ṁ = 1.0`: mass flow rate of the fixed flow source

• EQUATIONS:

  \[ 0 = p.Φ + n.Φ \] \[ 0 = p.ṁ + n.ṁ\] \[ p.ṁ = Ṁ\] \[ p.T = n.T\] \[ n.P = p.P\] \[ \]

PassiveIncompressiblePump(; name, η = 0.9)

• DESCRIPTION:

• INPUTS:

  • - `name`: Name of the system, symbol. Or use the @named macro when initializing.
  • - `η = 0.9`: DESCRIPTION

• EQUATIONS:

  \[ \] \[ \]

PassiveIncompressiblePump2(; name, η = 1.0)

• DESCRIPTION:

  A passive pump component for incompressible liquids. Calculates work required based off of pressures at the p and n port
  @named p = IncompressiblePin()
  @named n = IncompressiblePin()
  @named w = WorkPin()
  ps = @parameters η = η

• INPUTS:

  • - `name`: Name of the system, symbol. Or use the @named macro when initializing.
  • - `η = 1.0`: Isentropic effeciency of the pump

• EQUATIONS:

  \[ 0 = p.ṁ + n.ṁ \] \[ w.Ẇ = p.ṁ * p.v * (n.P - p.P) * 1e5 / η\] \[ w.Ẇ = p.Φ + n.Φ\] \[ n.T = p.T + (p.v * (n.P - p.P) * 1e5 / η - p.v * (n.P - p.P) * 1e5) / p.cp\] \[ \]

IncompressibleHeatTransfer(; name)

• DESCRIPTION:

  Basic heat transfer port. Includes p,n ports for flow, and q which is a heat transfer port
  @named p = IncompressiblePin()
  @named n = IncompressiblePin()
  @named q = HeatTransferPin()
  st = @variables Q̇(t) = 0.0 C(t) = 187 , Heat rate and duty of the flow

• INPUTS:

  • - `name`: Name of the system, symbol. Or use the @named macro when initializing.

• EQUATIONS:

  \[ 0 = p.ṁ + n.ṁ \] \[ q.Q̇ = p.Φ + n.Φ \] \[ C = p.ṁ * p.cp \] \[ 0 = q.Q̇ - Q̇\] \[ n.T = p.T + q.Q̇ / C\] \[ n.P = p.P\] \[ \]

FlowControlIncompressibleHeatTransfer(; name, ΔP = 0.0, Tout = 1000.0)

• DESCRIPTION:

  A heat transfer element with the ability to change the flow rate to achieve a desired outlet temperature, specified by the inputs.
  @named p = IncompressiblePin()
  @named n = IncompressiblePin()
  @named q = HeatTransferPin()
  st = @variables Q̇(t) = 0.0 C(t) = 187 ṁ(t) = 1.0
  ps = @parameters ΔP = ΔP Tout = Tout

• INPUTS:

  • - `name`: Name of the system, symbol. Or use the @named macro when initializing.
  • - `ΔP = 0.0`: Pressure drop across the heat transfer element (bar)
  • - `Tout = 1000.0`: outlet temperature (K)

• EQUATIONS:

  \[ n.T = Tout\] \[ ṁ = q.Q̇ / ((n.T - p.T) * p.cp) \] \[ p.ṁ = ṁ\] \[ 0 = p.ṁ + n.ṁ \] \[ q.Q̇ = p.Φ + n.Φ \] \[ C = ṁ * p.cp \] \[ 0 = q.Q̇ - Q̇\] \[ n.P = p.P - ΔP\] \[ \]

SinglePortReservoir(; name, P = 0.1, T = 300)

• DESCRIPTION:

  A sinlge port flow energy ground to connect with circiuts, only has n pin
  @named n = IncompressiblePin(Pdef = P, Tdef = T)
  ps = @parameters P = P T = T

• INPUTS:

  • - `name`: Name of the system, symbol. Or use the @named macro when initializing.
  • - `P = 0.1`: Pressure, (bar)
  • - `T = 300`: Temperature (K)

• EQUATIONS:

  \[ n.P = P\] \[ n.T = T\] \[ n.Φ = 0\] \[ \]

TwoPortReservoir(; name, P = 0.1, T = 300)

• DESCRIPTION:

  A flow conserving ground element with 2 ports.
  @named oneport = IncompressibleOnePort()
  @unpack ΔT, ΔP, LHS, n, p = oneport
  ps = @parameters T = T P = P

• INPUTS:

  • - `name`: Name of the system, symbol. Or use the @named macro when initializing.
  • - `P = 0.1`: Pressure
  • - `T = 300`: Bar

• EQUATIONS:

  \[ LHS = 0\] \[ n.Φ = 0\] \[ p.T = T\] \[ p.P = P\] \[ ΔP = 0\] \[ ΔT = 0\] \[ \]

throttle(; name)

• DESCRIPTION:

  An enthalpy conserving throttle valve. Does not control the outlet pressure, but mimics a throttle valve when placed between 2 sources wtih a pressure differential.

• INPUTS:

  • - `name`: Name of the system, symbol. Or use the @named macro when initializing.

• EQUATIONS:

  \[ \] \[ \]

IdealCooler(; name)

• DESCRIPTION:

• INPUTS:

  • - `name`: Name of the system, symbol. Or use the @named macro when initializing.

• EQUATIONS:

  \[ \] \[ \]

ReliefElement(; name)

• DESCRIPTION:

• INPUTS:

  • - `name`: Name of the system, symbol. Or use the @named macro when initializing.

• EQUATIONS:

  \[ n.ṁ + p.ṁ = 0 \] \[ q.Q̇ = p.Φ + n.Φ \] \[ \]

PINS

IncompressiblePin(; name, Pdef = 50, Tdef = 555, ṁdef = 0.0)

• DESCRIPTION:

  Incompresible Fluid pin,
  across_var = @variables P(t) = Pdef T(t) = Tdef s(t) = 1.0 cp(t) = 187 v(t) = 0.001
  thru_var = @variables ṁ(t) = ṁdef Φ(t) = 1.0 # mass flow and energy flow
  sts = [T, P, ṁ, cp, s, v, Φ]

• INPUTS:

  • - `name`: Name of the system, symbol. Or use the @named macro when initializing.
  • - `Pdef = 50`: Initial Pressure (bar)
  • - `Tdef = 555`: Initial Temperature (K)
  • - `ṁdef = 0.0`: Initial Flow Rate (kg/s)

• EQUATIONS:

  \[ cp = c_p(T)\] \[ v = v(T)\] \[ s = s(T)\] \[ \] \[ \]

WorkPin(; name)

• DESCRIPTION:

  Basic work pin
  sts = @variables Ẇ(t) = 0.0

• INPUTS:

  • - `name`: Name of the system, symbol. Or use the @named macro when initializing.

• EQUATIONS:

  \[ \] \[ \]

HeatTransferPin(; name)

• DESCRIPTION:

  sts = @variables Q̇(t) = 0.0

• INPUTS:

  • - `name`: Name of the system, symbol. Or use the @named macro when initializing.

• EQUATIONS:

  \[ \] \[ \]

FixedHeatFlowPin(; name, Qin = 1000.0)

• DESCRIPTION:

  Component with fixed heat flow rate
  sts = @variables Q̇(t) = Qin
  ps = @parameters Qin = Qin

• INPUTS:

  • - `name`: Name of the system, symbol. Or use the @named macro when initializing.
  • - `Qin = 1000.0`: Heating rate, (W)

• EQUATIONS:

  \[ eqs = [Q̇ = Qin]\] \[ \]

PORTS

IncompressibleOnePort(; name)

• DESCRIPTION:

  Oneport element for connecting single port components
  p = IncompressiblePin()
  n = IncompressiblePin()
  sts = @variables LHS(t) ΔP(t) = 0.0 ΔT(t) = 0.0

• INPUTS:

  • - `name`: Name of the system, symbol. Or use the @named macro when initializing.

• EQUATIONS:

  \[ LHS = p.Φ + n.Φ \] \[ 0 = p.ṁ + n.ṁ \] \[ ΔP = n.P - p.P \] \[ ΔT = n.T - p.T \] \[ \]

SOURCES

SetPressure(; name, P = 0.1)

• DESCRIPTION:

  Fixed pressure element

• INPUTS:

  • - `name`: Name of the system, symbol. Or use the @named macro when initializing.
  • - `P = 0.1`: Pressure (bar)

• EQUATIONS:

  \[ \] \[ \]

SetPressure2(; name, P = 0.1)

• DESCRIPTION:

  Fixed pressure element that does not use the onport function
  @named p = IncompressiblePin(Pdef = P)
  @named n = IncompressiblePin(Pdef = P)
  ps = @parameters P = P

• INPUTS:

  • - `name`: Name of the system, symbol. Or use the @named macro when initializing.
  • - `P = 0.1`: Pressure (bar)

• EQUATIONS:

  \[ p.P = P\] \[ n.P = p.P\] \[ n.T = p.T\] \[ 0 = p.Φ + n.Φ \] \[ 0 = p.ṁ + n.ṁ\] \[ \]

SetTemperature(; name, T = 300)

• DESCRIPTION:

  Fixed temperature element
  @named oneport = IncompressibleOnePort()
  @unpack ΔT, ΔP, LHS, p = oneport
  ps = @parameters T = T

• INPUTS:

  • - `name`: Name of the system, symbol. Or use the @named macro when initializing.
  • - `T = 300`: Temperature (K)

• EQUATIONS:

  \[ p.T = T\] \[ ΔT = 0\] \[ ΔP = 0\] \[ LHS = 0\] \[ \]