[Equest-users] Refrigeration version - mechanical subcooler
Phil Jordan
phil.jordan at clearesult.com
Thu Mar 26 08:43:18 PDT 2020
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
From: Equest-users <equest-users-bounces at lists.onebuilding.org<mailto:equest-users-bounces at lists.onebuilding.org>> On Behalf Of Brian Fountain via Equest-users
Sent: Wednesday, March 25, 2020 6:00 PM
To: equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>
Subject: [Equest-users] Refrigeration version - mechanical subcooler
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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
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