Transcript EnergyPlus Training Part 1

Lecture 17: VAV and Terminal
Reheat Systems
Material prepared by GARD Analytics, Inc. and University of Illinois
at Urbana-Champaign under contract to the National Renewable Energy
Laboratory. All material Copyright 2002-2003 U.S.D.O.E. - All rights reserved
Purpose of this Lecture
Gain an understanding of how to:

Define Air Loops and Zone Equipment input
for various types of fan systems
 VAV
 Terminal Reheat
Review various keywords already
covered and show how they interact to
form a complete system definition
2
VAV Systems in EnergyPlus
VAV with Reheat and Outside
Air Example
Supply Fan
Outside Air
 Air Loop contains the Mixed Air
CC
Mixed Outside
Air Box
Return Air
Relief Air
Resistive
VAV Box: ReHeat
East
Zone
Zone Air Splitter
Zone
R eturn Air M ixer
System, Supply Fan and the
Cooling Coil
Chilled Water Supply
 Outside air system will be
discussed later in more detail
 Zone Equipment Loop contains
the Splitter, VAV Box Air
Distribution Unit, the zones,
and the Return Air Path with
the Mixer.
Chilled Water Return
VAV Box: ReHeat
North
Zone
VAV Box: ReHeat
4
VAV with Reheat
Air Loop
Outside Air
Supply Fan
CC
Mixed Outside
Air Box
Relief Air
Chilled Water Return
Chilled Water Supply
Return Air
Air Primary Loop,
Typical Terminal Reheat 1,
Reheat System 1 Controllers,
Reheat System 1 Avail List,
1.3,
Air Loop Branches,
,
Air Loop Inlet Node,
Return Air Mixer Outlet Node,
Zone Equipment Inlet Node,
Air Loop Outlet Node;
!!!!!!!!!!-
Primary Air Loop Name
Name: Controller List
Name: System Availability Manager List
Primary air design volumetric flow rate {m3/s}
Air Loop Branch List Name
Air Loop Connector List Name
ReturnAir AirLoop Inlet Node
ZoneEquipGroup Outlet Node
SupplyAirPath ZoneEquipGroup Inlet Nodes
AirLoop Outlet Nodes
5
VAV with Reheat
Controller and Branch Lists
Outside Air
Supply Fan
CC
Mixed Outside
Air Box
Relief Air
Return Air
Chilled Water Return
Chilled Water Supply
CONTROLLER LIST,
Reheat System 1 Controllers, !- Name
Controller:Simple, !- Controller Type 1
Main Cooling Coil Controller; !- Controller Name 1
BRANCH LIST,
Air Loop Branches, !- Branch List Name
Air Loop Main Branch; !- Branch Name 1
6
VAV with Reheat
Main Branch
Outside Air
Supply Fan
CC
Mixed Outside
Air Box
Relief Air
Chilled Water Return
Chilled Water Supply
Return Air
BRANCH,
Air Loop Main Branch,
1.3,
OUTSIDE AIR SYSTEM,
OA Sys 1,
Air Loop Inlet Node,
Mixed Air Node,
PASSIVE,
FAN:SIMPLE:VariableVolume,
Var Vol Supply Fan 1,
Mixed Air Node,
Cooling Coil Air Inlet Node,
ACTIVE,
< cont’d on next slide>
!!!!!!!!!!!!-
Branch Name
Maximum Branch Flow Rate {m3/s}
Comp1 Type
Comp1 Name
Comp1 Inlet Node Name
Comp1 Outlet Node Name
Comp1 Branch Control Type
Comp2 Type
Comp2 Name
Comp2 Inlet Node Name
Comp2 Outlet Node Name
Comp2 Branch Control Type
7
VAV with Reheat
Main Branch (cont’d)
Outside Air
Supply Fan
CC
Mixed Outside
Air Box
Relief Air
Chilled Water Return
Chilled Water Supply
Return Air
COIL:Water:DetailedFlatCooling,
Detailed Cooling Coil,
Cooling Coil Air Inlet Node,
Air Loop Outlet Node,
PASSIVE;
!!!!!-
Comp3 Type
Comp3 Name
Comp3 Inlet Node Name
Comp3 Outlet Node Name
Comp3 Branch Control Type
8
VAV with Reheat
System Availability Manager
Outside Air
Supply Fan
CC
Mixed Outside
Air Box
Relief Air
Return Air
Chilled Water Return
Chilled Water Supply
SYSTEM AVAILABILITY MANAGER LIST,
Reheat System 1 Avail List,
!- Name
SYSTEM AVAILABILITY MANAGER:SCHEDULED, !- System Availability Manager type 1
Reheat System 1 Avail;
!- System Availability Manager name 1
SYSTEM AVAILABILITY MANAGER:SCHEDULED,
Reheat System 1 Avail,
!- Name
FanAndCoilAvailSched;
!- Schedule name
9
VAV with Reheat
Supply Fan
FAN:SIMPLE:VariableVolume,
Var Vol Supply Fan 1, !- Fan Name
CoolingCoilAvailSched, !- Available Schedule
0.7, !- Fan Total Efficiency
600.0, !- Delta Pressure {Pa}
1.3, !- Max Flow Rate {m3/s}
Outside Air
0.20, !- Min Flow Rate {m3/s}
0.9, !- Motor Efficiency
1.0, !- Motor In Airstream Fraction
0.35071223, !- FanCoefficient 1
Relief Air
0.30850535, !- FanCoefficient 2
-0.54137364, !- FanCoefficient 3
0.87198823, !- FanCoefficient 4
0.000, !- FanCoefficient 5
Air Loop Inlet Node, !- Fan_Inlet_Node
Cooling Coil Air Inlet Node; !- Fan_Outlet_Node
Supply Fan
CC
Mixed Outside
Air Box
Return Air
Chilled Water Return
Chilled Water Supply
10
VAV with Reheat Cooling Coil
Outside Air
Supply Fan
CC
Mixed Outside
Air Box
Relief Air
Return Air
COIL:Water:SimpleCooling,
Main Cooling Coil 1,
CoolingCoilAvailSched,
autosize,
autosize,
0.9,
Main Cooling Coil 1 Water Inlet Node,
Main Cooling Coil 1 Water Outlet Node,
Mixed Air Node 1,
Main Cooling Coil 1 Outlet Node;
Chilled Water Return
Chilled Water Supply
!- Coil Name
!- Available Schedule
!- UA of the Coil {W/K}
!- Max Water Flow Rate of Coil {m3/s}
!- Leaving Relative Humidity of Coil
!- Coil_Water_Inlet_Node
!- Coil_Water_Outlet_Node
!- Coil_Air_Inlet_Node
!- Coil_Air_Outlet_Node
11
VAV with Reheat
Cooling Coil Controller
Outside Air
Supply Fan
CC
Mixed Outside
Air Box
Relief Air
Return Air
Controller:Simple,
Main Cooling Coil Controller,
TEMP,
Reverse,
FLOW,
Air Loop Outlet Node,
Cooling Coil Water Inlet Node,
0.001,
0.0011,
0.0;
Chilled Water Return
Chilled Water Supply
!- Name
!- Control variable
!- Action
!- Actuator variable
!- Control_Node
!- Actuator_Node
!- Controller Convergence Tolerance: delta temp
from setpoint {C}
!- Max Actuated Flow {m3/s}
!- Min Actuated Flow {m3/s}
12
VAV with Reheat
Zone Supply Air Path
Resistive
Return Air Mixer
VAV Box: ReHeat
East
Zone Air Splitter
Zone
Zone
VAV Box: ReHeat
North
Zone
VAV Box: ReHeat
ZONE SUPPLY AIR PATH,
TermReheatSupplyPath,
!- Supply Air Path Name
Zone Equipment Inlet Node,
!- Supply Air Path Inlet Node
Zone Splitter,
!- KEY--System Component Type
Zone Supply Air Splitter;
!- Component Name
13
VAV with Reheat
Zone Splitter
Resistive
Return Air Mixer
VAV Box: ReHeat
East
Zone Air Splitter
Zone
Zone
VAV Box: ReHeat
North
Zone
VAV Box: ReHeat
ZONE SPLITTER,
Zone Supply Air Splitter,
!- Splitter Name
Zone Equipment Inlet Node,
!- Inlet_Node
Zone 1 Inlet Node,
!- Outlet_Node_1
Zone 2 Inlet Node,
!- Outlet_Node_2
Zone 3 Inlet Node;
!- Outlet_Node_3
14
VAV with Reheat
Zone Return Air Path
Resistive
Return Air Mixer
VAV Box: ReHeat
East
Zone Air Splitter
Zone
Zone
VAV Box: ReHeat
North
Zone
VAV Box: ReHeat
ZONE RETURN AIR PATH,
TermReheatReturnPath,
!- Return Air Path Name
Return Air Mixer Outlet,
!- Return Air Path Outlet Node
Zone Mixer,
!- KEY--System Component Type 1
Zone Return Air Mixer;
!- Component Name 1
15
VAV with Reheat
Zone Mixer
Resistive
Return Air Mixer
VAV Box: ReHeat
East
Zone Air Splitter
Zone
Zone
VAV Box: ReHeat
North
Zone
VAV Box: ReHeat
ZONE MIXER,
Zone Return Air Mixer,
!- Mixer Name
Return Air Mixer Outlet,
!- Outlet_Node
Zone 1 Outlet Node,
!- Inlet_Node_1
Zone 2 Outlet Node,
!- Inlet_Node_2
Zone 3 Outlet Node;
!- Inlet_Node_3
16
VAV with Reheat
Zone Equip Configuration
Resistive
Zone
VAV Box: Reheat
CONTROLLED ZONE EQUIP CONFIGURATION,
RESISTIVE ZONE,
!- Zone Name
Zone1Equipment,
!- List Name: Zone Equipment
Zone1Inlets,
!- List Name: Zone Inlet Nodes
,
!- List Name: Zone Exhaust Nodes
Zone 1 Node,
!- Zone Air Node Name
Zone 1 Outlet Node;
!- Zone Return Air Node Name
17
VAV with Reheat
Zone Equipment List
Resistive
Zone
VAV Box: Reheat
ZONE EQUIPMENT LIST,
Zone1Equipment,
!- Name
AIR DISTRIBUTION UNIT,
!- KEY--Zone Equipment Type 1
Zone1TermReheat,
!- Type Name 1
1,
!- Cooling Priority
1;
!- Heating Priority
18
VAV with Reheat Air
Distribution Unit
Resistive
Zone
VAV Box: Reheat
AIR DISTRIBUTION UNIT,
Zone1TermReheat,
!- Air Distribution Unit Name
Zone 1 Reheat Air Outlet Node,
!- Air Dist Unit Outlet Node Name
SINGLE DUCT:VAV:REHEAT,
!- KEY--System Component Type 1
Zone 1 VAV System;
!- Component Name 1
NODE LIST,
Zone1Inlets,
!- Node List Name
Zone 1 Reheat Air Outlet Node;
!- Node_ID_1
19
VAV with Reheat
VAV Terminal Unit
SINGLE DUCT:VAV:REHEAT,
SPACE1-1 VAV Reheat,
ReheatCoilAvailSched,
SPACE1-1 Zone Coil Air In Node,
SPACE1-1 ATU In Node,
0.33,
0.3,
SPACE1-1 Zone Coil Water In Node,
COIL:Water:SimpleHeating,
SPACE1-1 Zone Coil,
0.0003,
0.0,
SPACE1-1 In Node,
0.001,
REVERSE ACTION;
!!!!!!!!!!!!!!-
Name of System
Availability schedule for VAV System
Damper Outlet Node
Damper Inlet Node
Maximum air flow rate {m3/s}
Min air flow fraction
Control node
Reheat Component Object
Name of Reheat Component
Max Reheat Water Flow {m3/s}
Min Reheat Water Flow {m3/s}
Reheat Air Outlet Node
Convergence Tolerance
Damper Heating Action
20
VAV with Reheat Reheat Coil
Resistive
Zone
VAV Box: Reheat
COIL:Water:SimpleHeating,
SPACE1-1 Zone Coil,
ReheatCoilAvailSched,
300.,
0.0003,
SPACE1-1 Zone Coil Water In Node,
SPACE1-1 Zone Coil Water Out Node,
SPACE1-1 Zone Coil Air In Node,
SPACE1-1 In Node;
!!!!!!!!-
Coil Name
Available Schedule
UA of the Coil {W/K}
Max Water Flow Rate of Coil {m3/s}
Coil_Water_Inlet_Node
Coil_Water_Outlet_Node
Coil_Air_Inlet_Node
Coil_Air_Outlet_Node
21
Terminal Reheat Systems in
EnergyPlus
TermReheat
Controller and Branch Lists
Outside Air
Supply Fan
CC
Mixed Outside
Air Box
Relief Air
CONTROLLER LIST,
Reheat System 1 Controllers, !- Name
Controller:Simple, !- Controller Type 1
Main Cooling Coil Controller; !- Controller Name 1
BRANCH LIST,
Air Loop Branches, !- Branch List Name
Air Loop Main Branch; !- Branch Name 1
23
TermReheat
Main Branch
Outside Air
Supply Fan
CC
Mixed Outside
Air Box
Relief Air
BRANCH,
Air Loop Main Branch,
1.3,
FAN:SIMPLE:VariableVolume,
Var Vol Supply Fan 1,
Air Loop Inlet Node,
Cooling Coil Air Inlet Node,
ACTIVE,
COIL:Water:DetailedFlatCooling,
Detailed Cooling Coil,
Cooling Coil Air Inlet Node,
Air Loop Outlet Node,
PASSIVE;
!!!!!!!!!!!!-
Branch Name
Maximum Branch Flow Rate {m3/s}
Comp1 Type
Comp1 Name
Comp1 Inlet Node Name
Comp1 Outlet Node Name
Comp1 Branch Control Type
Comp2 Type
Comp2 Name
Comp2 Inlet Node Name
Comp2 Outlet Node Name
Comp2 Branch Control Type
24
TermReheat
System Availability Manager
Outside Air
Supply Fan
CC
Mixed Outside
Air Box
Relief Air
SYSTEM AVAILABILITY MANAGER LIST,
Reheat System 1 Avail List,
!- Name
SYSTEM AVAILABILITY MANAGER:SCHEDULED, !- System Availability Manager type 1
Reheat System 1 Avail;
!- System Availability Manager name 1
SYSTEM AVAILABILITY MANAGER:SCHEDULED,
Reheat System 1 Avail,
!- Name
FanAndCoilAvailSched;
!- Schedule name
25
TermReheat
Supply Fan
Outside Air
Supply Fan
CC
Mixed Outside
Air Box
Relief Air
FAN:SIMPLE:ConstVolume,
Supply Fan 1,
FanAndCoilAvailSched,
0.7,
600.0,
1.3,
0.9,
1.0,
Air Loop Inlet Node,
Cooling Coil Air Inlet Node;
!!!!!!!!!-
Fan Name
Available Schedule
Fan Total Efficiency
Delta Pressure {Pa}
Max Flow Rate {m3/s}
Motor Efficiency
Motor In Airstream Fraction
Fan_Inlet_Node
Fan_Outlet_Node
26
TermReheat
Cooling Coil
Outside Air
Supply Fan
CC
Mixed Outside
Air Box
Relief Air
COIL:Water:SimpleCooling,
Main Cooling Coil 1,
CoolingCoilAvailSched,
autosize,
autosize,
0.9,
Main Cooling Coil 1 Water Inlet Node,
Main Cooling Coil 1 Water Outlet Node,
Mixed Air Node 1,
Main Cooling Coil 1 Outlet Node;
!- Coil Name
!- Available Schedule
!- UA of the Coil {W/K}
!- Max Water Flow Rate of Coil {m3/s}
!- Leaving Relative Humidity of Coil
!- Coil_Water_Inlet_Node
!- Coil_Water_Outlet_Node
!- Coil_Air_Inlet_Node
!- Coil_Air_Outlet_Node
27
TermReheat
Cooling Coil Controller
Outside Air
Supply Fan
CC
Mixed Outside
Air Box
Relief Air
Controller:Simple,
Main Cooling Coil Controller,
TEMP,
Reverse,
FLOW,
Air Loop Outlet Node,
Cooling Coil Water Inlet Node,
0.001,
0.0011,
0.0;
!- Name
!- Control variable
!- Action
!- Actuator variable
!- Control_Node
!- Actuator_Node
!- Controller Convergence Tolerance: delta temp
from setpoint {C}
!- Max Actuated Flow {m3/s}
!- Min Actuated Flow {m3/s}
28
TermReheat
Zone Thermostat
Resistive
Return Air Mixer
VAV Box: ReHeat
East
Zone Air Splitter
Zone
Zone
VAV Box: ReHeat
North
Zone
VAV Box: ReHeat
ZONE CONTROL:THERMOSTATIC,
Zone 1 Thermostat,
RESISTIVE ZONE,
Zone Control Type Sched,
SINGLE HEATING SETPOINT,
Heating Setpoint with SB,
SINGLE COOLING SETPOINT,
Cooling Setpoint with SB;
!!!!!!!-
Thermostat Name
Zone Name
Control Type SCHEDULE Name
Control Type #1
Control Type Name #1
Control Type #2
Control Type Name #2
29
TermReheat
Thermostat Setpoints
Resistive
Return Air Mixer
VAV Box: ReHeat
East
Zone Air Splitter
Zone
Zone
VAV Box: ReHeat
North
Zone
VAV Box: ReHeat
SINGLE HEATING SETPOINT,
Heating Setpoint with SB,
Heating Setpoints;
!- Name
!- Setpoint Temperature SCHEDULE Name
SINGLE COOLING SETPOINT,
Cooling Setpoint with SB,
Cooling Setpoints;
!- Name
!- Setpoint Temperature SCHEDULE Name
30
TermReheat
Zone Supply Air Path
Resistive
Return Air Mixer
VAV Box: ReHeat
East
Zone Air Splitter
Zone
Zone
VAV Box: ReHeat
North
Zone
VAV Box: ReHeat
ZONE SUPPLY AIR PATH,
TermReheatSupplyPath,
!- Supply Air Path Name
Zone Equipment Inlet Node,
!- Supply Air Path Inlet Node
Zone Splitter,
!- KEY--System Component Type
Zone Supply Air Splitter;
!- Component Name
31
TermReheat
Zone Return Air Path
Resistive
Return Air Mixer
VAV Box: ReHeat
East
Zone Air Splitter
Zone
Zone
VAV Box: ReHeat
North
Zone
VAV Box: ReHeat
ZONE RETURN AIR PATH,
TermReheatReturnPath,
!- Return Air Path Name
Return Air Mixer Outlet,
!- Return Air Path Outlet Node
Zone Mixer,
!- KEY--System Component Type 1
Zone Return Air Mixer;
!- Component Name 1
32
TermReheat
Zone Splitter
Resistive
Return Air Mixer
VAV Box: ReHeat
East
Zone Air Splitter
Zone
Zone
VAV Box: ReHeat
North
Zone
VAV Box: ReHeat
ZONE SPLITTER,
Zone Supply Air Splitter,
!- Splitter Name
Zone Equipment Inlet Node,
!- Inlet_Node
Zone 1 Inlet Node,
!- Outlet_Node_1
Zone 2 Inlet Node,
!- Outlet_Node_2
Zone 3 Inlet Node;
!- Outlet_Node_3
33
TermReheat
Zone Mixer
Resistive
Return Air Mixer
VAV Box: ReHeat
East
Zone Air Splitter
Zone
Zone
VAV Box: ReHeat
North
Zone
VAV Box: ReHeat
ZONE MIXER,
Zone Return Air Mixer,
!- Mixer Name
Return Air Mixer Outlet,
!- Outlet_Node
Zone 1 Outlet Node,
!- Inlet_Node_1
Zone 2 Outlet Node,
!- Inlet_Node_2
Zone 3 Outlet Node;
!- Inlet_Node_3
34
TermReheat
Zone Equip Configuration
Resistive
Zone
VAV Box: ReHeat
CONTROLLED ZONE EQUIP CONFIGURATION,
RESISTIVE ZONE,
!- Zone Name
Zone1Equipment,
!- List Name: Zone Equipment
Zone1Inlets,
!- List Name: Zone Inlet Nodes
,
!- List Name: Zone Exhaust Nodes
Zone 1 Node,
!- Zone Air Node Name
Zone 1 Outlet Node;
!- Zone Return Air Node Name
35
TermReheat
Zone Equipment List
Resistive
Zone
VAV Box: ReHeat
ZONE EQUIPMENT LIST,
Zone1Equipment,
!- Name
AIR DISTRIBUTION UNIT,
!- KEY--Zone Equipment Type 1
Zone1TermReheat,
!- Type Name 1
1,
!- Cooling Priority
1;
!- Heating Priority
36
TermReheat
Air Distribution Unit
Resistive
Zone
VAV Box: ReHeat
AIR DISTRIBUTION UNIT,
Zone1TermReheat,
!- Air Distribution Unit Name
Zone 1 Reheat Air Outlet Node,
!- Air Dist Unit Outlet Node Name
SINGLE DUCT:VAV:REHEAT,
!- KEY--System Component Type 1
Zone 1 VAV System;
!- Component Name 1
NODE LIST,
Zone1Inlets,
!- Node List Name
Zone 1 Reheat Air Outlet Node;
!- Node_ID_1
37
TermReheat
VAV Terminal Unit
SINGLE DUCT:VAV:REHEAT,
SPACE1-1 VAV Reheat,
ReheatCoilAvailSched,
SPACE1-1 Zone Coil Air In Node,
SPACE1-1 ATU In Node,
0.33,
0.3,
SPACE1-1 Zone Coil Water In Node,
COIL:Water:SimpleHeating,
SPACE1-1 Zone Coil,
0.0003,
0.0,
SPACE1-1 In Node,
0.001,
REVERSE ACTION;
!!!!!!!!!!!!!!-
Name of System
Availability schedule for VAV System
Damper Outlet Node
Damper Inlet Node
Maximum air flow rate {m3/s}
Min air flow fraction
Control node
Reheat Component Object
Name of Reheat Component
Max Reheat Water Flow {m3/s}
Min Reheat Water Flow {m3/s}
Reheat Air Outlet Node
Convergence Tolerance
Damper Heating Action
38
TermReheat
Reheat Coil
Resistive
Zone
VAV Box: ReHeat
COIL:Water:SimpleHeating,
SPACE1-1 Zone Coil,
ReheatCoilAvailSched,
300.,
0.0003,
SPACE1-1 Zone Coil Water In Node,
SPACE1-1 Zone Coil Water Out Node,
SPACE1-1 Zone Coil Air In Node,
SPACE1-1 In Node;
!!!!!!!!-
Coil Name
Available Schedule
UA of the Coil {W/K}
Max Water Flow Rate of Coil {m3/s}
Coil_Water_Inlet_Node
Coil_Water_Outlet_Node
Coil_Air_Inlet_Node
Coil_Air_Outlet_Node
39
Summary
This lecture highlighted the EnergyPlus
input necessary to define most VAV and
Terminal Reheat systems

Air loop and zone equipment input

Thermostat input

Fan and coil component input

Controller input
40