[BLDG-SIM] ICE STORAGE in DOE2.1.E
Andy Lau
asl1 at psu.edu
Fri Jul 29 16:27:26 PDT 2005
Samuel,
I just used eQuest to model an ice storage system and I think your problem
is how you specify the ice storage priority relative to the chillers. You
adjust this in Equipment Controls by assigning the sequence number to the
ice storage and to the chiller (see HELP info pasted in below). If you
want the ice to share the load with the chiller, assign them both to be
sequence #1. The amount of load on each device will be based on the
capacity of each that you specify in this section.
Andy
Sequence
This spreadsheet contains a list of integers that specify the order in
which the equipment is used to satisfy the load¾equipment with higher
sequence numbers are not turned on until the load cannot be met by the
previously sequenced equipment.
During any given hour, equipment assigned sequence number 1 turns on first,
then if the load is not satisfied, the equipment with sequence number 2
turns on, etc. The equipment listed in the Boiler Name, Chiller Name, etc.
spreadsheets need not appear in the same order of the sequence
¾you can assign the sequence numbers in any order (however, they default to
the row number in the spreadsheet). This allows you, for example, to change
the sequence numbers and perform multiple simulations to optimize sequencing.
You can assign more than one piece of equipment to the same sequence
number. For example, if two units are intended to always turn on and
operate together, assign them the same sequence number.
DOE-2 turns on as many units as are required to meet the load. The load
per unit is prorated based on that units capacity relative to the total
capacity of units operating (you can, however, assign an upper limit to
each units capacity using the Maximum Load).
DOE-2 Command: EQUIP-CTRL
DOE-2 Keyword: BOILERS-SEQ-x; CHLR/HTRS-SEQ-x; CHILLERS-SEQ-x;
DHW-HEATERS-SEQ-x; HEAT-REJ-SEQ-x; GENERATORS-SEQ-x (x = 1,2,3,4,5)
See Also:
Equipment Controls and Load Management
At 06:15 AM 7/29/2005, Samuel Hassid wrote:
> I have a question on ice storage in DOE2.1.E
> I am using TES-TYPE Brine and I defined in the begining a CTANK-BASE-T
> parameter of 46 oF - below which the energy stored cannot be retrieved.
> Not liking what I was seing - ie that a large part of the energy
> stored could not be retrieved the next day - I defined a higher value of
> the CTANK-BASE-T parameter. However, I was shocked to see that even if I
> define 55 oF as tank base- in the end I get the same behaviour, with the
> temperature of the storage being higher.
> Is there any way around this problem one could suggest ?
>
>======================================================
>You received this e-mail because you are subscribed to the
>BLDG-SIM at GARD.COM mailing list. To unsubscribe from this mailing list
>send a blank message to BLDG-SIM-UNSUBSCRIBE at GARD.COM
>
Andrew S. Lau, PE, LAP
7group, 1007 Bayberry Drive, State College, PA 16801
www.sevengroup.com, 814-238-4273
===========================
You received this e-mail because you are subscribed
to the BLDG-SIM at GARD.COM mailing list. To unsubscribe
from this mailing list send a blank message to
BLDG-SIM-UNSUBSCRIBE at GARD.COM
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20050729/d31bb0d0/attachment-0002.htm>
More information about the Bldg-sim
mailing list