[Equest-users] Service Water Heating Energy Savings

[Carol Gardner]

Hi Will,

Just put the gpm value of your new service water system into the process
flow input on the Process/DHW tab of your DHW loop. The schedule for usage
is there too, but will be the same in both cases.

I would not expect a hand calc to match the eQUEST calc in any case, as
eQUEST will likely be using a much more complicated schedule.

Best,

Carol

On Mon, Oct 25, 2010 at 8:14 AM, Will Mak <wmak at epsteinglobal.com> wrote:

>  I am working on a project that has energy savings on the domestic water
> heater for the service water heating due to low flow sinks and lavs. We have
> been asked to provide calculations to justify the energy savings on the
> energy model. The spreadsheet I have attached shows the calculation proving
> our savings however I am having a hard time connecting how eQuest models
> this compared to the spreadsheet along with matching the energy consumption
> values from eQuest and the spreadsheet.
>
>
>
> What should be the proper inputs for the Service Water Heating system be?
>
>
>
> Any suggestions? Thanks!
>
>
>
> BASELINE REPORT- BEPU Building Utility Performance
>                            WEATHER FILE- Chicago      IL TMY2
>
>
> ---------------------------------------------------------------------------------------------------------------------------------
>
>
>
>                          TASK     MISC    SPACE    SPACE     HEAT
> PUMPS     VENT    REFRIG  HT PUMP   DOMEST    EXT
>
>                LIGHTS   LIGHTS   EQUIP   HEATING  COOLING   REJECT   &
> AUX     FANS   DISPLAY  SUPPLEM  HOT WTR   USAGE    TOTAL
>
>               -------  -------  -------  -------  -------  -------
> -------  -------  -------  -------  -------  -------  --------
>
>
>
> EM1  ELECTRICITY
>
>     KWH        94936.       0.  159052.       0.  177219.       0.
> 33723.  140910.       0.       0.    *1857.*   10821.   618518.
>
>
>
> FM1  NATURAL-GAS
>
>     THERM          0.       0.       0.   33591.       0.       0.
> 0.       0.       0.       0.       0.       0.    33591.
>
>
>
>
>
>
>
>
>
>            TOTAL ELECTRICITY    618518. KWH        13.449 KWH     /SQFT-YR
> GROSS-AREA   13.449 KWH     /SQFT-YR NET-AREA
>
>            TOTAL NATURAL-GAS     33591. THERM       0.730 THERM   /SQFT-YR
> GROSS-AREA    0.730 THERM   /SQFT-YR NET-AREA
>
>
>
>
>
>            PERCENT OF HOURS ANY SYSTEM ZONE OUTSIDE OF THROTTLING RANGE =
> 0.3
>
>            PERCENT OF HOURS ANY PLANT LOAD NOT SATISFIED                =
> 0.0
>
>
>
>            NOTE:  ENERGY IS APPORTIONED HOURLY TO ALL END-USE CATEGORIES.
>
>
>
>
>
> PROPOSED REPORT- BEPU Building Utility
> Performance                                                   WEATHER FILE-
> Chicago      IL TMY2
>
>
> ---------------------------------------------------------------------------------------------------------------------------------
>
>
>
>                          TASK     MISC    SPACE    SPACE     HEAT
> PUMPS     VENT    REFRIG  HT PUMP   DOMEST    EXT
>
>                LIGHTS   LIGHTS   EQUIP   HEATING  COOLING   REJECT   &
> AUX     FANS   DISPLAY  SUPPLEM  HOT WTR   USAGE    TOTAL
>
>               -------  -------  -------  -------  -------  -------
> -------  -------  -------  -------  -------  -------  --------
>
>
>
> EM1  ELECTRICITY
>
>     KWH        62239.       0.  159052.  113974.  113369.       0.
> 41385.   66957.       0.       0.    *1572.*    3721.   562270.
>
>
>
> FM1  NATURAL-GAS
>
>     THERM          0.       0.       0.   18311.       0.       0.
> 0.       0.       0.       0.       0.       0.    18311.
>
>
>
>
>
>
>
>
>
>            TOTAL ELECTRICITY    562270. KWH        12.226 KWH     /SQFT-YR
> GROSS-AREA   12.226 KWH     /SQFT-YR NET-AREA
>
>            TOTAL NATURAL-GAS     18311. THERM       0.398 THERM   /SQFT-YR
> GROSS-AREA    0.398 THERM   /SQFT-YR NET-AREA
>
>
>
>
>
>            PERCENT OF HOURS ANY SYSTEM ZONE OUTSIDE OF THROTTLING RANGE =
> 0.7
>
>            PERCENT OF HOURS ANY PLANT LOAD NOT SATISFIED                =
> 0.0
>
>
>
>            NOTE:  ENERGY IS APPORTIONED HOURLY TO ALL END-USE CATEGORIES.
>
>
>
>
>
>
>
>
>
>
>
> *William Mak, LEED Green Associate*
> Mechanical Design Engineer
>
> *EPSTEIN*
> Architecture
> Interiors
> Engineering
> Construction
>
> 600 West Fulton Street
> Chicago, Illinois 60661-1259
>
> D: (312) 429-8116
> F: (312) 559-1217
> E: wmak at epsteinglobal.com
> W: www.epsteinglobal.com
>
> þ Epstein is a firm believer in sustainability. We ask that you please
> consider the environment before printing this e-mail.
>
>
>
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>


-- 
Carol Gardner PE
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