[Bldg-sim] EPW file for Jakarta

Thu Aug 4 04:17:27 PDT 2016

One additional comment.  Using weather files 15-20 or more years old can be
a problem depending on how accurate you wish to be both in absolute terms
and in comparative terms as the weather in the past 10 years and projected
into the future is different enough at many locations that it has measurable
impacts on usage and in some cases should impact design decisions.  

From: Bldg-sim [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of
Joe Huang via Bldg-sim
Sent: Wednesday, August 03, 2016 7:56 PM
To: bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] EPW file for Jakarta

A correction, followed by a rant about free weather data on the Web :-)

doe2.com is the web site for eQUEST  and is completely unrelated to DOE. The
weather files on the doe2.com server are largely, if not entirely, obtained
from the LBNL server used for DOE-2 development from the 1980s-2000s. These
weather files were accumulated at LBNL while carrying out various research
projects, mostly in the 1980s-1990s, in which I was quite involved.  In
those days, we assumed that weather files would be unavailable and budgeted
for creating them from raw data. For example, the list of available stations
for Asia  (see http://doe2.com/Download/Weather/NON-US/asia-sp.txt )
contains 5 Chinese locations created for my sabbatical there, 5 Pakistani
locations created for a World Bank project, and 5 Southeast Asian locations
created for an USAID ASEAN project (which is why there is Jakarta), all done
in the 1980s. Similarly, the 3 locations in Mexico were created for an USAID
project I had there in the early 1990s.  For some regions such as Europe,
Australia, the Middle East, the files were contributed by Visiting Scholars,
which explains why the selections might seem querky and uneven.

I have no objections to doe2.com hosting these weather files, and actually
think it's a service since the  LBNL server has been offline for at least 5
years. However, one of the unintended consequences in having free weather
files online is that it fosters the mentality that weather files ought to be
free and disposable. 
However, as anyone who has ever tried can attest, creating a usable weather
file from raw data takes quite a bit of effort.  All the free weather files
hosted on various web sites were all subsidized in some way, either by the
government  such as DOE for NREL to develop the TMYs, an university  for
academic research or by a research institute as part of a larger project, as
I had described earlier.  Outside of these circumstances, efforts to develop
weather files, even by nonprofit organizations such as ASHRAE, has to be
recovered in some fashion.  The best analogy I have would be with books.  I
have yet to see someone asking for a book on some technical topic and
expecting it to be free. 

Now I like free stuff as much as anyone, and don't begrudge the free TMYs,
CWECs, etc. floating around (in fact, I actually hosted many of these on my
Web site).  But if you can't find what you want among the free stuff, or if
you prefer something more up-to-date (the majority of the non-US files on
the doe2.com or the EnergyPlus weather web sites are at least 15 years old),
please don't rule out paying for it.

Joe

Joe Huang
White Box Technologies, Inc.
346 Rheem Blvd., Suite 205A
Moraga CA 94556
yjhuang at whiteboxtechnologies.com <mailto:yjhuang at whiteboxtechnologies.com> 
http://weather.whiteboxtechnologies.com for simulation-ready weather data
(o) (925)388-0265
(c) (510)928-2683
"building energy simulations at your fingertips"

On 8/3/2016 10:06 AM, Ajit Naik via Bldg-sim wrote:

The DOE has some non-USA weather data in BIN format here:

http://doe2.com/Download/Weather/NON-US/

the data is older - Jakarta file appears to be 19878.

you can convert to EPW as described here:

http://energy-models.com/forum/converting-bin-files-epw-files

Ajit Naik, BEMP

Energy Engineer

dbHMS
303 W Erie Street, Suite 510

Chicago, IL 60654

p (312) 915-0557 x308

f  (312) 915-0558

www.dbhms.com

From: Bldg-sim [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of
Vikram Sami via Bldg-sim
Sent: Wednesday, August 03, 2016 12:00 PM
To: bldg-sim at lists.onebuilding.org <mailto:bldg-sim at lists.onebuilding.org> 
Subject: [Bldg-sim] EPW file for Jakarta

Where can I find an EPW file for Jakarta, Indonesia? I looked on the
Energyplus site and couldn't fine one. 

Thanks!

Vikram

Vikram Sami, AIA, BEMP, LEED AP BD+C

Director of Building Performance

OLSON KUNDIG

159 South Jackson Street, Suite 600, Seattle, WA 98104 USA        

T +1 206 624 5670   <http://olsonkundig.com/> olsonkundig.com

Twitter / Instagram @olsonkundig

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