[BLDG-SIM] eQust and DoE simulation in China
Joe Huang
YJHuang at lbl.gov
Thu Oct 5 12:45:22 PDT 2006
MessageAs I've stated in a previous message, DOE-2.1E in its various guises has been used extensively in China. I've recently completed an ASHRAE paper that compared DOE-2 to measured data for the first LEED Gold building in China - the US-China Agenda 21 demonstration energy-efficient office building that was a collaboration between USDOE and China Ministry of Science and Technology. But validation of DOE-2, or any simulation program, against measured data is almost entirely a matter of matching results by adjusting the inputs. Only very detailed measurements would be able to discern possible discrepancies in heat flows or predicted indoor temperatures or loads. Leaving aside the issues of inputs and weather data, I cannot think of any intrinsic thermodynamic reason why DOE-2 (or any other physically-based thermal simulation program) would be inappropriate for China.
Joe
----- Original Message -----
From: Tianzhen Hong
To: BLDG-SIM at gard.com
Sent: Thursday, October 05, 2006 9:16 AM
Subject: [BLDG-SIM] eQust and DoE simulation in China
Matt,
If you are looking for validation of DOE-2.1E, you can find reports at gundog.lbl.gov web pages.
I have not seen any measurement verification reports done in China for DOE-2 simulations.
Tianzhen
-----Original Message-----
From: BLDG-SIM at gard.com [mailto:BLDG-SIM at gard.com] On Behalf Of myeagle00 at yahoo.com wu
Sent: Thursday, October 05, 2006 5:34 AM
To: BLDG-SIM at gard.com
Subject: [BLDG-SIM] eQust and DoE simulation in China
Dear all,
My question is about eQuest. I wander if eQuest could be used to to energy simulation for a highrise residential building with PV system? Are there any published paper on this?
my second question is about the validation of the program. Has anybody used eQuest in semin tropical climate in China (or similar area like hongkong) and validated their result? Jeff suggested that eQuest shares the same core as DOE-2 which has been extensively used in China and I can get validation from the DoE. Any suggestion is highly appreciated.
Your help is very much appreciated.
Best Regards,
Matt
-------------------------------
On 25/08/06, Jeff Hirsch <Jeff.Hirsch at doe2.com> wrote:
You can use the eQUEST weather processor (eQ_WthProc)
http://doe2.com/index_Wth.html
to read a EPW file and convert to DOE-2 compatible file (that
you can discard if not useful) but then you will have csv files
(orig and final - with doe-2 conversions) with the variables you
want (including headers) on the "final" csv if you uncheck the
"clear Interim Results on Exit" checkbox on the setup tab.
Here is an example original csv partial
DryBulbT
DewPtT
Sol-GlobHor
WindSpd
WindDir
Sol-DirNorm
Month
Day
Hour
F
F
w/m²
mph
degrees
w/m²
1
1
1
18.86
2.66
0
2.23
110
0
1
1
2
17.6
5
0
0
0
0
1
1
3
17.06
3.2
0
0.67
0
0
1
1
4
16.34
1.4
0
1.56
0
0
1
1
5
15.8
-0.4
0
2.23
360
0
Here is the example correcponding final
DryBulbT WetBulbT DewPtT RelHum HumRatio Sol-GlobHor Sol-DirNorm WindSpd WindDir
Month Day Hour F F F % lbmw/lbma w/m2 w/m2 mph degrees
1 1 1 18.86 15.21 2.66 44.47 0.000907 0 0 2 110
1 1 2 17.6 14.68 5 53.33 0.001024 0 0 0 0
1 1 3 17.06 13.99 3.2 49.9 0.000933 0 0 1 0
1 1 4 16.34 13.17 1.4 47.08 0.00085 0 0 2 0
1 1 5 15.8 12.51 -0.4 44 0.000773 0 0 2 360
---
Jeff Hirsch
James J. Hirsch & Associates
Building Performance Analysis Software & Consulting
12185 Presilla Road
Camarillo, CA 93012-9243 USA
phone: (805) 553-9000
fax: (805) 532-2401
email: Jeff.Hirsch at DOE2.com
web: http://DOE2.com
----- Original Message -----
From: "Michael J. Witte" <mjwitte at gard.com>
To: <BLDG-SIM at GARD.COM>
Cc: <BLDG-SIM at gard.com>
Sent: Friday, August 25, 2006 9:56 AM
Subject: [BLDG-SIM] [EnergyPlus_Support] Average hourly statistics for wet bulb temperatures
My mistake! You are correct that the epw-->csv conversion will only give DB,
RH, and Dew Point. The alternate route is to run an annual simulation with
EnergyPlus using the weather file of interest, select "Outdoor Wet Bulb" as an
hourly REPORT VARIABLE, and then use the csv output file to generate
statistics. One could even generate the averages with EnergyPlus by applying
schedules to the report variable and reporting the scheduled value as monthly
averages.
Mike
On 25 Aug 2006 at 6:20, Gerald Pde wrote:
> Energyplus weather files do not have wet-bulb
> temperatures, do they? I had the impression they only
> have DB , RH and Dew Point. You might have to manually
> convert to wetbulb which might be quite an exercise.
> Is there a simpler way of computing the data below?
>
> Thanks
> Gerald
>
> --- "Michael J. Witte" <mjwitte at gard.com> wrote:
>
> > If you are looking for long-term averages, you can
> > download the EnergyPlus IWEC
> > file for Brisbane (www.energyplus.gov --> Weather
> > Data) and use the EnergyPlus
> > weather converter to convert it from epw format to a
> > csv file which includes
> > column headings and can be opened in a spreadsheet
> > program. Then you can
> > compute the averages from there.
> >
> > Mike
> >
> >
> > On 24 Aug 2006 at 17:55, Ashfaque Ahmed Chowdhury
> > wrote:
> >
> > > Hello All,
> > >
> > > I require average hourly statistics (Jan-Dec) for
> > wet bulb temperatures (°C
> > > or °F) of Brisbane, Australia. I tried to find
> > using Bureau of Meteorology,
> > > Australia website.But can't find any suitable
> > data. Can anyone give me any
> > > link to find it out?
> > >
> > > Thanks in advanced.
> > >
> > >
> > >
> > > --Ashfaque
> > >
> > > CQU, Australia
> > >
> > > --
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> ========================================================
> > Michael J. Witte, GARD Analytics, Inc.
> > EnergyPlus Testing and Support
> > EnergyPlus-Support at gard.com
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