Element Heat Addition
 Orifices and Generic Losses
 Discrete Loss
 HeaterCooler
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 Fixed Flow Element
 Orifice Plates
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 Expansions and Contractions
UI Name (*.flo Label)  Description 

Heat Mode (HEAT_MODE)  Mode of heat transfer to/from the fluid in the element.

Heat Input (QIN)  The value entered for QIN depends on the HEAT_MODE
selected. HEAT_MODE: QIN value
*In cases where multiple flow streams are modeled by a single element (for example, NED and NLU not equal to 1), set the value of QIN to model the heat flow from only one of the restrictions. 
Fraction of QIN applied before restriction (QIN_RATIO)  Fraction of the total heat to be added before the restriction. (0 = None, 1 = All) 
Heat Addition Details
 0. Adiabatic
 $\u2206{T}_{t}=0or\u2206{H}_{t}=0$
 1. Heat Addition
 $\u2206{T}_{t}=\frac{{Q}_{in}}{\dot{m}{Cp}_{avg}}or\u2206{H}_{t}=\frac{{Q}_{in}}{\dot{m}}$
 2. Heat Addition per mass flow
 $\u2206{T}_{t}=\frac{{Q}_{in}}{{Cp}_{avg}}or\u2206{H}_{t}={Q}_{in}$
 3. Element Delta T
 $\u2206{T}_{t}={Q}_{in}$ ( ${Q}_{in}$ refers to the input variable name).
 4. Element Exit Total Temperature
 ${T}_{t,exit}={Q}_{in}$ ( ${Q}_{in}$ refers to the input variable name).
 5. NTU
 $\u2206{T}_{t}=({T}_{sink}{T}_{t,inlet})\left(1\mathrm{e}\mathrm{x}\mathrm{p}\left({Q}_{in}\right)\right)$ ( ${Q}_{in}$ refers to the input variable name).
 6. HTC*Area
 $\u2206{T}_{t}=({T}_{sink}{T}_{t,inlet})\left(1\mathrm{e}\mathrm{x}\mathrm{p}\left(\frac{{Q}_{in}}{\dot{m}{Cp}_{avg}}\right)\right)$ ( ${Q}_{in}$ refers to the input variable name).
 7. Adiabatic with JouleThomson Effect
 If temperature used in energy equations and JT coefficient are usersupplied:
 8. Fixed Fluid Quality at Exit
 This option only works if enthalpy is used for the energy equations and Coolprop is used for the fluid properties. The ${T}_{t,exit}$ and ${H}_{t,exit}$ is retrieved from Coolprop using ${Quality}_{exit}$ and ${P}_{s,exit}$ .
 9. Heat from Compression
 This option is only valid for the elements that can have a pressure rise, like a fixed flow element or a Flow versus Source Pressure element. You must verify that the pressures on both sides of the element are accurate. If a fixed flow element is attached to a boundary, the boundary's pressure does not have to be accurate unless this HEAT_MODE is used.
The QIN_Ratio
The heat can be applied before and/or after the restriction. If QIN_RATIO=0, all heat is added after the restriction and the “upstream” temperature used in the flow rate calculations is the temperature of the upstream chamber. The flow rate is only adjusted if the fluid is not an incompressible liquid.