Dear Greg,
It’s very possible! I’m completing a model
which uses the Heat Exchanger in the configuration shown on the schematic, and
it is working well. My particular model does not use 100% OA, but I think
all you’ll need to do is set up the Controller:OutdoorAir object to have
a minimum fraction which is always = 1 (something like what I’ve shown
below).
p.s., The example files are helpful, but you have to wade
through all of the node names to figure out what’s connected to
what. I always make a schematic to help keep them straight.
|
|
Controller:OutdoorAir |
|
Name |
OAController_Aquatics |
|
Relief
Air Outlet Node Name |
NodeOut_EA_Aquatics |
|
Return
Air Node Name |
NodeIn_RA_Aquatics |
|
Mixed
Air Node Name |
NodeOut_MA_Aquatics |
|
Actuator
Node Name |
NodeIn_OA_Aquatics |
|
Minimum
Outdoor Air Flow Rate |
2.50132 |
|
Maximum
Outdoor Air Flow Rate |
13.21452 |
|
Economizer
Control Type |
FixedDryBulb |
|
Economizer
Control Action Type |
ModulateFlow |
|
Economizer
Maximum Limit Dry-Bulb Temp (C) |
29.4 |
|
Economizer
Maximum Limit Enthalpy (J/kg) |
82939 |
|
Economizer
Maximum Limit Dewpoint Temp (C) |
MT |
|
Electronic
Enthalpy Limit Curve Name |
MT |
|
Economizer
Minimum Limit Dry-Bulb Temp (C) |
-40 |
|
Lockout
Type |
NoLockout |
|
Minimum
Limit Type |
FixedMinimum |
|
Minimum
Outdoor Air Schedule Name |
|
|
Minimum
Fraction of Outdoor Air Schedule Name |
SchCpct_AlwaysOn |
|
Maximum
Fraction of Outdoor Air Schedule Name |
SchCpct_AlwaysOn |
|
Mechanical
Ventilation Controller Name |
|
|
Time of Day
Economizer Control Schedule Name |
|
|
High
Humidity Control |
|
|
Humidistat
Control Zone Name |
|
|
High
Humidity Outdoor Air Flow Ratio |
|
|
Control
High Indoor Humidity Based on Outdoor Humidity Ratio |
|
|
Heat
Recovery Bypass Control Type |
It
is contradictory to insist that future generations respect the natural
environment when our educational systems and laws do not help them to respect
themselves. (Let's do both.)
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