Evaporative Fluid Coolers cannot have an Autosized Design Entering Water Temperature #11283
Description
Issue overview
- Follow up from Fix Evaporative Fluid Cooler Table Reports and Add Design Entering Temperature Defaults #11043
- In this PR, the EvaporativeFluidCooler:SingleSpeed / TwoSpeed gained the ability to "Autosize" the Design Entering Water Temperature, by reading from the Sizing:Plant
Problems:
- The
GetEvapFluidCoolerInputdirectly throws if the Design EWT is < 0 (Autosize is < 0...). That checks should be done after Sizing reads it - Should ensure that if Autosized, and not Sizing:Plant is found, then it should error out.
Other problem I reported: AFAIK this "Autosized" value is not being reported to EIO/SQL
Operating System (Multiple choices)
Any
Operating System Version
N/A
Version of EnergyPlus
v25.1.0-IOFreeze
Unmethours link or helpdesk ticket number
N/A
Defect file
as I said here: #11043 (comment)
I'm testing this out, modifying EvaporativeFluidCooler.idf. I tried to make it Design Entering Water Temperature to Autosize
** Severe ** EvaporativeFluidCooler:SingleSpeed = "BIG EVAPORATIVEFLUIDCOOLER", invalid data for "Design Entering Water Temperature", entered value <= 0.0, but must be >0 for Performance Input Method = "USERSPECIFIEDDESIGNCAPACITY".
** Severe ** EvaporativeFluidCooler:SingleSpeed = "BIG EVAPORATIVEFLUIDCOOLER", Design Entering Water Temperature must be greater than Design Entering Air Wet-bulb Temperature.
** Fatal ** Errors found in getting evaporative fluid cooler input.
I then proceeded to add a Sizing:Plant object since it's supposed to be reading from it, same error
diff --git a/testfiles/EvaporativeFluidCooler.idf b/testfiles/EvaporativeFluidCooler.idf
index 5c1d7742b9..2de554b6d3 100644
--- a/testfiles/EvaporativeFluidCooler.idf
+++ b/testfiles/EvaporativeFluidCooler.idf
@@ -1692,7 +1692,7 @@
, !- Design Air Flow Rate U-factor Times Area Value {W/K}
0.001703, !- Design Water Flow Rate {m3/s}
87921, !- User Specified Design Capacity {W}
- 46.11, !- Design Entering Water Temperature {C}
+ AutoSize, !- Design Entering Water Temperature {C}
35, !- Design Entering Air Temperature {C}
25.6; !- Design Entering Air Wet-bulb Temperature {C}
@@ -1733,6 +1733,13 @@
Heating Demand Side Connectors, !- Demand Side Connector List Name
Optimal; !- Load Distribution Scheme
+
+ Sizing:Plant,
+ Hot Water Loop, !- Plant or Condenser Loop Name
+ Heating, !- Loop Type
+ 56.11, !- Design Loop Exit Temperature {C}
+ 10; !- Loop Design Temperature Difference {deltaC}
+
SetpointManager:Scheduled,
Hot Water Loop Setpoint Manager, !- Name
Temperature, !- Control Variable