Issue1913 remove sta t

[hcasperfu]

This closes #1913.

The models that have sta_?.T in their reference results:

Fluid.HeatExchangers.Radiators.Examples.RadiatorEN442_2
Fluid.FixedResistances.Validation.LosslessPipe
Examples.{SimpleHouse,Tutorial.SimpleHouse.SimpleHouse6}

• Added TemperatureTwoPort components to replace sta_?.T.

Fluid.Interfaces.Examples.{PrescribedOutlet,PrescribedOutlet_TSetOnly,PrescribedOutlet_Water,PrescribedOutlet_X_wSetOnly}

• Added TemperatureTwoPort to base class IBPSA.Fluid.Interfaces.Examples.BaseClasses.PrescribedOutletState.

Fluid.SolarCollectors.Validation.{EN12975_Array,EN12975_Series}
Fluid.Humidifiers.Validation.{SteamHumidifier_X_dynamic,SprayAirWasher_X,SteamHumidifier_X,SprayAirWasher_X_dynamic}
Fluid.Interfaces.Examples.{ConservationEquation,StaticTwoPortConservationEquation}
Fluid.Interfaces.Examples.Humidifier_u

• No action. Flow rate is constant.

Fluid.Geothermal.Borefields.Examples.RectangularBorefield

• No action because allowFlowReversal==false.

[hcasperfu]

Converted PR to draft.
Fluid.Interfaces.Examples.Humidifier_u is in the list in OpenModelica/OpenModelica#12704 and I need more time to think about what to do with it.

[hcasperfu]

Converted to draft again to work on the following additional models:

• Fluid.Chillers.Validation.Carnot_TEva_reverseFlow
• Fluid.HeatExchangers.Validation.ConstantEffectiveness
• Fluid.HeatPumps.Validation.Carnot_TCon_reverseFlow

They were missed in the grep because variable names with the regex form sta_..\.T (such as sta_a1.T) were not considered.

[mwetter]

@jelgerjansen : Can you please review this so that we have a non-LBNL reviewer. This change is needed due to allow verification across different Modelica tools. See lbl-srg/modelica-buildings#3957 for the reason and discussions.

[jelgerjansen]

@hcasperfu the changes look good to me. I only have a minor comment regarding the naming of temperature sensors at the inlet of a component. If you want to keep the current naming, that's fine by me (and then I'll approve).

[hcasperfu]

@jelgerjansen -
Greetings and thanks for the review!
I changed the variable names as suggested except for the chiller/HP models. Personally I think "entering" and "leaving" temperatures are more commonly used than "in" or "out" in these contexts. An example in the library is IBPSA.Fluid.Chillers.Examples.Carnot_TEva, although it is not for a temperature sensor.