VAV Guidelines - Taylor Engineering

Appendix 3 – Airflow in the Real World.......................................................................... 196
Interior Zone Airflow........................................................................................... 196
Perimeter Zone Airflow ...................................................................................... 198
System Level Airflow........................................................................................... 200
Appendix 4 – Cooling Loads in the Real World.............................................................. 203
Appendix 5 – DOE-2 Fan Curves ....................................................................................... 206
Appendix 6 – Simulation Model Description.................................................................. 212
Assumptions.......................................................................................................... 212
Results .................................................................................................................... 215
Appendix 7 – VAV Box Minimum and Maximum Flows for 2 Manufacturers ....... 220
Appendix 8 – How to Model Different VAV Zone Controls in DOE-2.2..................... 221
Single Maximum................................................................................................... 221
Dual Maximum-VAV Heating............................................................................. 226
Dual Maximum with Constant Volume Heating............................................. 231
Tips for Accurate Modeling of Zone Controls ................................................ 234
Appendix 9: Simulated Performance of Three Zone Control Sequences ................ 237
Summary................................................................................................................ 237
Schematics of Modeled Zone Control Sequences.......................................... 238
Model Description ................................................................................................ 239
Basecase Results.................................................................................................. 243
Parametric Analysis............................................................................................ 246
Appendix 10: How to Model DCV Control In EQUEST................................................... 252
Fixed Minimum Ventilation Control................................................................. 252
Multi-zone DCV Using Sum of Zone Air Method ............................................ 256
Multi-zone DCV using Critical Zone Method................................................... 258
Sample eQuest Simulation Hourly Output ...................................................... 259
Appendix 11: Analysis of DCV in Densely Occupied Zone of a VAV System .......... 262
Basecase Modeling Assumptions..................................................................... 263
DCV Modeling Assumptions .............................................................................. 265
Simulation Results............................................................................................... 266
Appendix 12: Fan Systems ................................................................................................ 268
Overview ................................................................................................................ 268
Fan System Models .............................................................................................. 268
Motor Model........................................................................................................... 282
Variable Speed Drive Model............................................................................... 284
Belt Model............................................................................................................... 286
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