Hamdi,
I mean no disrespect to Elements, which was developed by good friends of mine at Big Ladder Software, but I think you're way overestimating its capabilities. Yes, you can modify the latitude and longitude, but I doubt the normalization function does anything with such climatic parameters as wind speed, relative humidity, temperature, etc., because there is no relationship between them and the geographical coordinates. There might be adjustments in the solar radiation due to the changes in sun position, but even there I'm highly doubtful because that would require Elements to be able to calculate sun positions, which is not a trivial calculation. I believe the purpose of the Normalization Function is to recalculate the psychrometrics if the user modifies the temperatures or humidities on the input weather file.
If a modified weather file results in a successful simulation, that only says the modifications did not push the weather data outside of physical possibility, e.g., RH above 100, dewpoint higher than dry-bulb temperature, etc. It says nothing about whether the modified weather file accurately represents the weather at the intended location.
Joe
Joe Huang White Box Technologies, Inc. 346 Rheem Blvd., Suite 205A Moraga CA 94556 yjhuang@xxxxxxxxxxxxxxxxxxxxxxxx http://weather.whiteboxtechnologies.com for simulation-ready weather data (o) (925)388-0265 (c) (510)928-2683 "building energy simulations at your fingertips"
Dear Joe,
There was a slip in my mind. Elements cannot calculate those three variables by inputting Latitude and Longitude. Instead, there is a dialog box that the user can modify the values of Latitude and Longitude. Nevertheless, the Normalization function in Elements did generate a complete new weather file data including other variables such as relative humidity, solar radiation, etc. Once created, I used the newly created EPW in EnergyPlus and the simulation was successful. This is what I meant by 'working fine' in my previous e-mail.
Thanks and regards,Hamdi
On Friday, January 12, 2018 11:41 AM, "Joe Huang YJHuang@xxxxxxxxxxxxxxxxxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:
Hamdi,I'm curious how Elements can calculate the wind speed, solar radiation and relative humidity based on the input latitude and longitude? That would be some very smart algorithm and make it unnecessary to even collect weather data! Also, what do you mean by the weather file working fine in EnergyPlus? That the program didn't blow up?Joe
Joe Huang White Box Technologies, Inc. 346 Rheem Blvd., Suite 205A Moraga CA 94556 yjhuang@xxxxxxxxxxxxxxxxxxxxxxxx http://weather.whiteboxtechnologies.com for simulation-ready weather data (o) (925)388-0265 (c) (510)928-2683 "building energy simulations at your fingertips"On 1/9/2018 5:08 PM, Hamdi Akmal L hamdi_akmal@xxxxxxxxx [EnergyPlus_Support] wrote:
Dear Koji,
I use Elements sofware to create a weather file ( EPW) file for EnergyPlus. It is available at no cost. In my case, i need a weather file for Aceh, Indonesian. I took Penang weather file as the nearest location, then I took monthly max average and min average from Aceh weather station data. Elements does the so called the Normalization and produce complete data for Aceh. Wind speed, solar radiation and relative humidity were calculated automatically by Elements according to the inputted latitude and longitude. I have tested and works fine in EnergyPlus.Regards,
Hamdi AkmalOn 10 Jan 2018 7:40 a.m., "Koji Takemasa koji_takemasa@xxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:
Hi.
I want epw weather data of Indonesian Surabaya, but how can I get it?
Regards.
--
Name : Koji Takemasa ( Ph.D. )
Mail : koji_takemasa@xxxxxxxxx
( http://www.lead-labo.jp/ )
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Posted by: Joe Huang <yjhuang@xxxxxxxxxxxxxxxxxxxxxxxx>
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