Switching to FollowThermal requires also moving
the CHP unit from the demand side to the supply side of the plant loop. You
can’t just make a change in ElectricLoadCenter:Distribution, you need to
rearrange the plant loop as well. You might want to look at the example file
called MicroCogeneration.idf.
From: EnergyPlus_Support@xxxxxxxxxxxxxxx
[mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On
Behalf Of pzhaocsm
Sent: Wednesday, June 09, 2010
10:05 PM
To:
EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Why
the generators stop working when selected "Follow Thermal"
Hello,
I have tried the HeatRecoveryPlantLoop.idf for CHP application.
I selected "follow thermal" of "Generator Operation Scheme
Type" in "ElectricLoadCenter:Distribution" object. When the
"follow thermal" option is selected, the three generators all stopped
working and of course no thermal energy output. But I found the output of
"HOT WATER LOOP:Plant Loop Unmet Demand" was zero, so the thermal
demand must be met by the water heater on the heating loop.
Then I checked the "Big Water Heater" of
"WaterHeater:Mixed", which is on the heat recovery loop (and also on
the supply side of heating loop) and supposed to collect the hot water from
generators for heating coils. I found the "Big Water Heater" is
running on electricity with maximum "200000 W", I turned it to be
"0", because I want the heating demand met by recovered hot water
from generators.
But the simulation result is: The generators are still not working (no
electricity output, not thermal output), the output of "HOT WATER
LOOP:Plant Loop Unmet Demand" to be very high, so all of the heating
demand was not met, and room temperature goes down to be -1 or -2 in the
winter. So the thermal output (now is zero) of generators are not following the
demand.
How does this happen? How can I make the generators working on following the
thermal load? How can I use the recovered hot water for heating instead of
electric water heaters?
Thanks a lot!
Peng
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