Add sizing data for VAV for case study

[mwetter]

This issue is to add to the branch issue92_caseStudyFullHVAC the sizing data from the EnergyPlus simulations.

[mwetter]

The development branch is issue101_caseStudyFullHVAC_sizingDataVAV.

Todo

• [x] Add parameters for controls
• [x] Add AHU sizing data
• [x] Verify maximum heating suppy air temperature. The idf file has:

  50,                      !- Maximum Heating Supply Air Temperature {C}

  but we use 45 degC as the maximum heating water temperature. The 50 degC should likely be reduced, and then the Modelica sizing data be updated accordingly (see THeaDisVAV_nominal, THeaWatSup_nominal and THeaWatRet_nominal).

• [x] Verify settings in conAHU, tab "Supply Air Temperature", group "Temperature limits".

[mwetter]

Note that the heating water temperatures and heating air flow rates at design conditions need to be changed. With 45/35C, we get

Error: The following error was detected at time: 0
  eps_nominal out of bounds, eps_nominal = 1.87907
  To achieve the required heat transfer rate at epsilon=0.8, set |T_a1_nominal-T_a2_nominal| = 75.1628
  or increase flow rates. The current parameters result in 
  CMin_flow_nominal = 339.181
  CMax_flow_nominal = 2039.5
  Failed condition: vav.VAVBox[1].terHea.eps_nominal > 0 and vav.VAVBox[1].terHea.eps_nominal < 1

FixInitials:Init: Integrator failed to start model.

E.g., for the air and water flow rates from EnergyPlus, we would need 75K temperature difference between heating water supply and air inlet temperature.

[mwetter]

@yanchenpnnl: There seems to be something wrong with the flow rates from EnergyPlus. I transferred them to issue101_caseStudyFullHVAC_sizingDataVAV, commit cb1238d8a8f19d6c0f79020a6faff08e5be268ef. The terminal box computes eps_nominal = QHea_nominal/( CMin_flow * dT_nominal) where dT_nominal is the design temperature difference of the inlets. With this, the modeI gets eps_nominal = 1.87907 which is not physical, and the model stops after initialization due to an assert that checks for eps_nominal. Can you please verify what heat exchanger efficiencies result from the EnergyPlus design calculations with 45/35C heating temperatures, and 13 degC AHU discharge temperature. The above error indicates that we would need 13+75=88 C heating water temperature to have a heat exchanger effectiveness of 0.8. Note that CMin_flow_nominal is from medium 2, which is the air-side. All updated sizes are in SizingParameter.mo.