# Modeling HW system with inside HW loop?

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Hi!

How I can modeling HW system, which use hot water from source of hot water (Urban network) to heating internal water, which circulate in building?

Hot water in heat exchanger heating water which go to baseboards and Ventilations heat coils after that go back to heat exchanger.

Temperature in out loop 130 - 70 ?C (266 - 158 ?F)

Temperature in inside loop 80 - 60 ?C (176 - 140 ?F)

How I can setting cost of hot water from Urban network?

Sincerely yours,
Mikhail Samoletov

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Joined: 2010-11-02
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Mikhail,

You will need to use some combination of hot water loops and steam meters.
See the discussion below on Steam Meters. The tricky part may be that you
are not actually accessing a steam system, but rather a hot water system.
Try to figure it out and ask more questions as needed.

Best,

Carol

Volume 3: Topics > Overview and Converting From
2.1E>
PLANT
Energy Meters

The electric and fuel meters have been expanded from 5 each to 100 and 15
each, respectively. You now define these meters using the ELEC-METER and
FUEL-METER commands, and may give each meter your own name. The
ENERGY-RESOURCE command has been eliminated and all characteristics of the
energy (consumption units, etc.) are now defined within the meter command.
As before, you define the cost structure of the energy in the UTILITY-RATE
command.

The ELEC-METER command is a TYPE command; the TYPE can be either UTILITY,
BUILDING or SUB-METER. All ELEC-METERs with TYPE=SUB-METER must be
included in the BLDG/SUB-METER list of a UTILITY meter or the SUB-METER list
for an ELEC-METER with TYPE=BUILDING. Similarly, all ELEC-METERs with
TYPE=BUILDING must be included in the BLDG/SUB-METER list of a UTILITY meter
.

"EM20" = ELEC-METER
TYPE = UTILITY
SOURCE-SITE-EFF = 0.37
..

In addition, purchased steam and chilled water may be specified using the
STEAM-METER and CHW-METER commands.

If you do not define any meters, you may still assign various loads to
different meters using the default meters predefined in the library. For
electricity, these are EM1 through EM25, and for fuel they are FM1 through
FM25. You use these meter names identically to the old names (the old
codewords M1, M2, M3, M4, and M5 no longer exist).

To change the default hierarchy of the meters, use the
MASTER-METERScommand. This command replaces the function of the
MSTR-ELEC-
METER, MSTR-FUEL-METER, etc., keywords that used to be in the
PLANT-ASSIGNMENT command.

2010/11/2 ????????? ??????

--
Carol Gardner PE

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Joined: 2010-10-05
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