VAV Guidelines - Taylor Engineering

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F IGURE 87: G RAPHICS S CREEN S HOWING Z ONE ID FOR R ESET D RIVERS X154X FAN TYPE, SIZE AND CONTROL This indicates that <strong>VAV</strong> box 20 has the highest cooling loop output Field Experience with Static Pressure, Supply Air Temperature Reset and Other Demand-Based Reset Sequences Appendix 14 describes several buildings where trend data was collected to see how successfully supply air temperature setpoint reset, static pressure setpoint reset and demand controlled ventilation sequences had been implemented. Trend data was collected on approximately 15 air handling systems. Figure 88 summarizes the static pressure reset results presented in Appendix 14. As this figure shows the average pressure setpoint was approximately halfway between the maximum and minimum setpoints, which means that these systems are achieving considerable fan energy savings compared to a fixed setpoint scheme.
San Ramon Tech Center / Main AC1 San Ramon Tech Center / Main AC2 Sacramento Courthouse / (Average of 32 AHUs) Sacramento Courthouse / AH-7A1 Sacramento Courthouse / AH-7A2 UC Merced Library / AHU-1 UC Merced Library / AHU-2 UC Merced Library / AHU-3 UC Merced Library / AHU-4 UC Merced Classroom Bldg / AHU-1 Cold Deck Morgan Hill Rec Center AC-1 Santa Clara Service Center Building #3 Max, Min, Avg Pressure Setpoint (in. w.g.) 0 0.5 1 1.5 2 2.5 Case study savings for supply air temperature reset were not as consistent as for static pressure reset. One reason is that most of the pressure reset case studies used a trim and respond sequence while most of the temperature reset case studies used PID control. Several of the temperature reset case studies had one or two rogue zones that inhibited the reset. There were however, a couple successful temperature reset case studies. Figure 89 illustrates one such example. The gray lines in this figure illustrate the reset sequence, i.e. setpoint is fixed at 53 o F when outside air temperature is at 60 o F and is reset between 55 and 63 when outside air temperature is below 55 o F. The actual setpoint is consistently pegged at the maximum temperature that the reset sequence will allow. F IGURE 88: S UMMARY OF S TATIC P RESSURE R ESET C ASE S TUDIES FAN TYPE, SIZE AND CONTROL X155X
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TABLE OF CONTENTS Preface..........
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Appendix 3 - Airflow in the Real Wo
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This report was prepared by Pacific
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� Energy savings estimates for de
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T ABLE 1: K EY R ECOMMENDATIONS X2X
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HVAC ELECTRICITY SAVINGS ARE ESTIMA
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F IGURE 3: O VERVIEW OF G UIDELINE
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X8X fans for typical large VAV appl
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… PRODUCING A PRODUCT THAT WORKS
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… SLIGHTLY MORE THAN 20% OF ALL C
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X14X INTRODUCTION EARLY DESIGN ISSU
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T ABLE 3: HVAC AND A RCHITECTURAL C
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X18X INTRODUCTION 1. Tool Expense:
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F IGURE 5: T HE R OLE OF S IMULATIO
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A SYSTEM SELECTION MATRIX CAN ACCOM
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X24X INTRODUCTION of these two syst
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Performance Attribute Floor Space R
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X28X INTRODUCTION Location and Size
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F IGURE 9: T YPICAL D UCT R ISER X3
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X32X INTRODUCTION However, there ar
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X34X INTRODUCTION coil cost and air
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T ABLE 6: M INIMUM V ENTILATION R A
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X38X INTRODUCTION significant time
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F IGURE 10: M EASURED L IGHTING S C
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X42X INTRODUCTION Monitored Lightin
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T ABLE 8: E QUIPMENT P OWER D ENSIT
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X46X INTRODUCTION Monitored Plug Lo
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X48X INTRODUCTION Performance Targe
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X50X ZONE ISSUES ZONE ISSUES This s
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X52X ZONE ISSUES Zoning and Thermos
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X54X ZONE ISSUES The 2005 Title 24
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X56X ZONE ISSUES � DCV Using Crit
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X58X ZONE ISSUES A good article on
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X60X VAV BOX SELECTION VAV BOX SELE
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F IGURE 21: VAV H OT W ATER R EHEAT
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X64X VAV BOX SELECTION � By reduc
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F IGURE 24: D UAL M AXIMUM WITH VAV
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X68X VAV BOX SELECTION 1. The minim
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X70X VAV BOX SELECTION Air Change E
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X72X VAV BOX SELECTION higher) A/D
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T ABLE 13: S AMPLE C ALCULATION OF
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X76X VAV BOX SELECTION Design Maxim
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T ABLE 14: VAV B OX M AXIMUM A IRFL
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F IGURE 28: S ITE 3 VAV B OX D EMAN
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F IGURE 30: D UAL D UCT - F ROM H E
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T ABLE 16: C OMPARISON OF D UAL- D
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X86X VAV BOX SELECTION sufficient f
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X88X VAV BOX SELECTION Other Issues
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X90X VAV BOX SELECTION 4. DDC zone
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X92X VAV BOX SELECTION to most owne
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X94X DUCT DESIGN 2. Use standard le
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F IGURE 34: P RESSURE D ROP T HROUG
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F IGURE 36: P RESSURE D ROP T HROUG
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X100X DUCT DESIGN indicator since n
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X102X DUCT DESIGN Design Friction R
Page 114 and 115: X104X DUCT DESIGN Return Air System
Page 116 and 117: F IGURE 38: P OOR D ISCHARGE C ONFI
Page 118 and 119: X108X DUCT DESIGN But for sound att
Page 120 and 121: X110X SUPPLY AIR TEMPERATURE CONTRO
Page 122 and 123: F IGURE 41: C OMPARISON OF M ILD D
Page 124 and 125: X114X SUPPLY AIR TEMPERATURE CONTRO
Page 126 and 127: X116X FAN TYPE, SIZE AND CONTROL Re
Page 128 and 129: T ABLE 20: C OMPARISON OF C OMMON V
Page 130 and 131: F IGURE 43: A T YPICAL M ANUFACTURE
Page 132 and 133: F IGURE 46: G AMMA C URVE F IGURE 4
Page 134 and 135: F IGURE 50: G AMMA C URVES FOR A LL
Page 136 and 137: F IGURE 54: F AN B ELT E FFICIENCY
Page 138 and 139: F IGURE 56: C ASE S TUDY A - S ELEC
Page 140 and 141: F IGURE 60: C ASE S TUDY A - 60 IN.
Page 142 and 143: F IGURE 63: C ASE S TUDY A - P ART
Page 144 and 145: F IGURE 67: C ASE S TUDY A - L OAD
Page 146 and 147: F IGURE 70: C ASE S TUDY A - C ARRI
Page 148 and 149: Discharge Sound Power Manuf. Unit C
Page 150 and 151: F IGURE 73: C ASE S TUDY B - S ELEC
Page 152 and 153: F IGURE 77: C ASE S TUDY B - H ISTO
Page 154 and 155: F IGURE 80: C ASE S TUDY B S IMULAT
Page 156 and 157: F IGURE 82: V ELOCITY P ROFILE O FF
Page 158 and 159: X148X FAN TYPE, SIZE AND CONTROL re
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Page 162 and 163: X152X FAN TYPE, SIZE AND CONTROL ex
Page 166 and 167: F IGURE 89: S AMPLE S UPPLY A IR T
Page 168 and 169: F IGURE 91: O PTIMAL S TAGING (PERF
Page 170 and 171: F IGURE 95: "PARALLELING" - H IGH F
Page 172 and 173: X162X FAN TYPE, SIZE AND CONTROL Fa
Page 174 and 175: X164X COILS AND FILTERS Filter Area
Page 176 and 177: Site Coil Dimensions AIR SIDE Capac
Page 178 and 179: X168X OUTSIDE AIR/RETURN AIR/EXHAUS
Page 182 and 183: F IGURE 99: R ETURN F AN T RACKING
Page 184 and 185: F IGURE 101: I NJECTION F AN WITH D
Page 186 and 187: Isolation Zones X176X OUTSIDE AIR/R
Page 188 and 189: F IGURE 103: A IRSIDE E CONOMIZER C
Page 192 and 193: T ABLE 24: H IGH L IMIT S WITCH R E
Page 194 and 195: T ABLE 25: S UMMARY OF M ONITORING
Page 196 and 197: F IGURE 109: S ITE 1, M ONITORED HV
Page 198 and 199: X188X APPENDIX 1 - MONITORING SITES
Page 200 and 201: X190X APPENDIX 1 - MONITORING SITES
Page 202 and 203: T ABLE 26: O FFICE B UILDING E NERG
Page 204 and 205: F IGURE 116: P EAK D AY E LECTRIC D
Page 206 and 207: X196X APPENDIX 3 - AIRFLOW IN THE R
Page 208 and 209: F IGURE 121: S ITE 4, S AMPLE OF I
Page 210 and 211: F IGURE 124: S ITE 4, S AMPLE OF P
Page 212 and 213: F IGURE 127: T OTAL S YSTEM A IRFLO
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F IGURE 130: S ITE 2 (LIGHT BAR INC
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F IGURE 134: S AMPLE P ART L OAD P
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F IGURE 136: P ART L OAD P ERFORMAN
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X210X APPENDIX 5 - DOE-2 FAN CURVES
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X212X APPENDIX 6 - SIMULATION MODEL
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System Properties X214X APPENDIX 6
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F IGURE 140: F AN P ERFORMANCE C UR
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T ABLE 30: S UPPLY A IR T EMPERATUR
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APPENDIX 7 - VAV BOX MINIMUM AND MA
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F IGURE 145: E QUEST I NPUTS FOR M
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X224X APPENDIX 8 - HOW TO MODEL DIF
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F IGURE 149: D UAL M AXIMUM WITH VA
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F IGURE 151: E Q UEST I NPUT TO E N
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F IGURE 153: H ISTOGRAM OF D AMPER
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F IGURE 156: D UAL M AXIMUM WITH CV
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F IGURE 158: S IMULATED D UAL M AXI
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F IGURE 160: S AMPLE SV-A R EPORT F
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F IGURE 162: A NNUAL U TILITY C OST
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F IGURE 166: O CCUPANCY S CHEDULE a
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T ABLE 31: B ASECASE M ODELING A SS
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F IGURE 168: VAV F LOW R ATIO AND H
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F IGURE 171: F AN F LOW H ISTOGRAM
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T ABLE 33: P ARAMETRIC R UNS X248X
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F IGURE 173: Z ONE A IR F LOW C ONT
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X252X APPENDIX 10: HOW TO MODEL DCV
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F IGURE 178: A IR F LOW T AB FOR T
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F IGURE 181: E Q UEST S YSTEM L EVE
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F IGURE 183: Z ONE O UTSIDE A IR T
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F IGURE 185: Z ONE H OURLY R EPORT
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APPENDIX 11: ANALYSIS OF DCV IN DEN
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F IGURE 190: O CCUPANCY S CHEDULES
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F IGURE 195: C OMPARISON OF A IRFLO
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F IGURE 197: F AN S YSTEM C OMPONEN
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F IGURE 198: T UNING D ATA FOR 660
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F IGURE 199: T UNING D ATA FOR C HA
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F IGURE 201: F AN E FFICIENCY AS A
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F IGURE 203: C OOK 660 CPL-A P LENU
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F IGURE 205: E XTRAPOLATION OF F AN
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F IGURE 207: H OUSED A IRFOIL F ANS
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F IGURE 211: G AMMA AT P EAK VS. D
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F IGURE 213: E XAMPLE M OTOR E FFIC
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F IGURE 215: C OMBINED M OTOR AND D
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X288X APPENDIX 12: FAN SYSTEMS Fan
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X290X APPENDIX 12: FAN SYSTEMS Saft
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F IGURE 219: A DAPTER P HOTO COURTE
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T ABLE 38: S UPPLY A IR T EMPERATUR
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F IGURE 223: S UPPLY A IR T EMPERAT
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F IGURE 225: S UPPLY A IR T EMPERAT
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F IGURE 226: S UMMARY OF S TATIC P
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F IGURE 229: S TATIC P RESSURE R ES
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X304X APPENDIX 14 - ZONE DEMAND BAS
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F IGURE 232: P RESSURE AND T EMPERA
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T ABLE 41: D EMAND C ONTROLLED V EN
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X310X APPENDIX 15 - REFERENCES APPE
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X312X APPENDIX 15 - REFERENCES Yu-P
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X314X APPENDIX 15 - REFERENCES Filt
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X316X APPENDIX 15 - REFERENCES Sche
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