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Question - Refrigeration Sizing error #41

Open wta12 opened 3 months ago

wta12 commented 3 months ago

Got below EP error messages when running SWXX000-00 TRC System Types measures for Gro.csv. Can you confirm if it's current error or my setup mistake ? Thanks,

   **   ~~~   ** Must Be Entered. Check input value choices.
   ** Severe  ** GetRefrigerationInput: Refrigeration:Compressor="LT_COMPRESSOR8"One, and Only One of Rated Superheat or Rated Return Gas Temperature
   **   ~~~   ** Must Be Entered. Check input value choices.
   ** Severe  ** GetRefrigerationInput: Refrigeration:Compressor="LT_COMPRESSOR9"One, and Only One of Rated Superheat or Rated Return Gas Temperature
   **   ~~~   ** Must Be Entered. Check input value choices.
   ** Warning ** Refrigeration:System="MT_SYSTEM", You may wish to check the system sizing. Total nominal cooling capacity is 163883W. Condenser capacity is 52654W. Nominal compressor capacity is 219347W.
   ** Warning ** Refrigeration:System="LT_SYSTEM", You may wish to check the system sizing. Total nominal cooling capacity is 61224W. Condenser capacity is 34936W. Nominal compressor capacity is 110402W.
   **  Fatal  ** GetRefrigerationInput:  Previous errors cause program termination
rogerkbaker commented 3 months ago

This is an issue with the ref-sys-comp.pxt parameters, which specify defaults for both the return_gas_temp and rated_sh values (18 C for the former and 5 C for the latter. The template should be changed to blank out one or the other (I prefer blanking out return_gas_temp, as superheat is usually specified by the TXV settings plus heat gain on the return line. As a workaround, you could try including :return_gas_temp for each line in the cases file, and setting it to "" (blank value). Hopefully this will override the default until a permanent fix is incorporated.

wta12 commented 3 months ago

Thanks, I did remove return_gas_temp and the EP simulation is successfully finished but the sizing warning is stills raised. Can you point me to the detail documentation along with (old version) models for DEER prototypes in different vintages (1985 - 2022) which are basis for your default (baseline) cases ? I want to check if EUI and end use breakdown are comparable to original version while validate the input. It's ok even models are in old DOE 2.2 file format.

rogerkbaker commented 3 months ago

The default cases are not mine (I am a user, not a prototype developer) - they are the case files located in the "SWXX000-00 Measure Name" folder under commercial measures. I typically run all combinations of this measure to test changes in files posted to the main branch, just to ensure they still work. As for documentation, you can try https://cedars.sound-data.com/deer-resources/tools/energy-plus/. There are links to the CalBEM website, which was the source of most of the commercial model info. The same cedars page also has a library of documents that include a user guide, which may help.

wta12 commented 3 months ago

Thanks @rogerkbaker for info. Do you have any contact in your mind about DEER prototype developer ? I would want to do some QAQC checks against old version (DOE/MAS3 control) - old vintage version is useful to us. The link on CalBEM is terminologies not actual input value

rogerkbaker commented 3 months ago

You could try deersupport@dnv.com. They oversee the prototypes generally. Also, if you go to the CalBEM site, access the database, and when the big chart comes up, select the download icon. The last option on that menu lets you download the models in IDF format (except residential, which are CSE format, for use with the California Simulation Engine).

wta12 commented 3 months ago

Could not find link to access database at CalBem website. Can you send me the exact link to me(any register required?) so that I can download idf file as you suggested ?

On Sun, Mar 31, 2024 at 11:03 AM rogerkbaker @.***> wrote:

You could try @.*** They oversee the prototypes generally. Also, if you go to the CalBEM site, access the database, and when the big chart comes up, select the download icon. The last option on that menu lets you download the models in IDF format (except residential, which are CSE format, for use with the California Simulation Engine).

— Reply to this email directly, view it on GitHub https://github.com/sound-data/DEER-Prototypes-EnergyPlus/issues/41#issuecomment-2028846810, or unsubscribe https://github.com/notifications/unsubscribe-auth/AD47GP6PLHK3RABM4POGBPTY3BFWFAVCNFSM6AAAAABFPY42PKVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDAMRYHA2DMOBRGA . You are receiving this because you authored the thread.Message ID: @.***>

rogerkbaker commented 3 months ago

https://calbem-benchmarking.com/app/ should get you to the main chart from the database. The Down arrow on the upper right allows downloading of models, among other options. The list of models is in a modal popup, whose URL I cannot determine directly.

wta12 commented 3 months ago

Got it. Thank you so much! Just wonder if you know where I can download the old version in DOE2.2 and MAS3 format with their documentation anywhere ? The idf version at CalBEM has no Refrigeration objects but uses Electricity Plug load to represent plug load only. EUI should be ok but component loads are much different from the new version.

On Sun, Mar 31, 2024 at 11:38 AM rogerkbaker @.***> wrote:

https://calbem-benchmarking.com/app/ should get you to the main chart from the database. The Down arrow on the upper right allows downloading of models, among other options. The list of models is in a modal popup, whose URL I cannot determine directly.

— Reply to this email directly, view it on GitHub https://github.com/sound-data/DEER-Prototypes-EnergyPlus/issues/41#issuecomment-2028864317, or unsubscribe https://github.com/notifications/unsubscribe-auth/AD47GP6CP6FGTGSP5NDHK5TY3BJZVAVCNFSM6AAAAABFPY42PKVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDAMRYHA3DIMZRG4 . You are receiving this because you authored the thread.Message ID: @.***>

simularis commented 3 months ago

Just wonder if you know where I can download the old version in DOE2.2 and MAS3 format with their documentation anywhere ?

Here you can get the DOE2 version of prototypes, including the workbooks with input parameters and tool to generate models.

Within some eTRM measure packages you might find an archive of generated models and results.