I have a model of a refrigerated warehouse in the refrigeration version
of eQUEST.? It is running in version 7174 currently.
I am trying to add a mechanical subcooler to the model.? I can add the
subcooler keywords, the PS-H for the subcooler is generated but so far
despite many control keyword iterations, I am seeing no load on the
subcooler and no impact on the refrigeration system with its inclusion
in the model.
Currently, my inputs are:
"Subcooler 1" = SUBCOOLER
?? TYPE???????????? = MECHANICAL
?? ATTACH-TO??????? = REFG-SYSTEM
?? REFG-SYSTEM????? = "Refrigeration System"
?? CAPACITY???????? = {#PA("Subcool Cap TR")*3413}
?? DESIGN-SUBCOOL-T = 40
?? SST-SUBCOOL-TD?? = {60}
?? SUPERHEAT-DT???? = {101-90}
?? TEMP-CTRL??????? = SATURATION-DT
?? SATURATION-DT??? = 40
?? SUCTION-CIRCUIT? = "Low Temp Suction Circuit"
?? ..
"Subcool liquid circuit" = REFG-CIRCUIT
?? TYPE???????????? = LIQUID
?? ATTACH-TO??????? = SUBCOOLER
?? SUBCOOLER??????? = "Subcooler 1"
?? ..
Has anyone successfully added mechanical subcooling to a refrigeration
version simulation?
Many thanks,
Brian
I remember this being tricky to add. Check out the ?Hierarchy Rules? (step 9) on page 9 of the DOE2 Refrigeration Dictionary:
http://doe2.com/download/doe-22/DOE22Vol2r-DictionaryRefrigeration.pdf
(Looks like the doe2.com site is down so I?ve attached the relevant pages.)
Also attached are my notes on how I had simulated mechanical subcooling in prior models (in an earlier version of eQUEST ? v3.61b, I think ? but hopefully should still apply to the latest version).
Regards,
Phil Jordan
Phil,
Thank you for your very helpful assistance in getting subcoolers working
in a refrigeration version model in eQUEST.? Your notes were
instrumental in resolving the problems I was having.? It turns out I
left my liquid lines attached to the refrigeration system -- essentially
the condenser -- rather than attaching them to the subcooler. This was
functionally bypassing the subcooler. Step 3 of your notes pointed out
the error.? I also had not fully defined the warmer loop before defining
the cooler loop as described in step 2 of the refrigeration hierarchy
guidance you shared.
I greatly appreciate your assistance.
Kind regards,
Brian