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	<title>openRevit &#187; energy analysis</title>
	<atom:link href="http://openrevit.com/tag/energy-analysis/feed/" rel="self" type="application/rss+xml" />
	<link>http://openrevit.com</link>
	<description>discussions on buildings, energy, software and all things bim</description>
	<lastBuildDate>Wed, 09 May 2012 20:23:38 +0000</lastBuildDate>
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		<title>Python for Energy Modelers &#8211; Part 2 &#8211; Simple Pre-processing</title>
		<link>http://openrevit.com/2012/01/python-for-energy-modelers-part-2-simple-pre-processing/?utm_source=rss&#038;utm_medium=rss&#038;utm_campaign=python-for-energy-modelers-part-2-simple-pre-processing</link>
		<comments>http://openrevit.com/2012/01/python-for-energy-modelers-part-2-simple-pre-processing/#comments</comments>
		<pubDate>Sun, 08 Jan 2012 19:24:25 +0000</pubDate>
		<dc:creator>Marcus Jones</dc:creator>
				<category><![CDATA[Development]]></category>
		<category><![CDATA[energy analysis]]></category>
		<category><![CDATA[python]]></category>

		<guid isPermaLink="false">http://openrevit.com/?p=392</guid>
		<description><![CDATA[After a great <a href="http://openrevit.com/2012/01/python-for-energy-modelers-part-1/">introduction </a>by <a href="http://www.optiras.com/">Clayton Miller</a>, let's dig in and see how easy and powerful it is to mix a little Python into your simulation workflow!

Computers are fantastic at performing repetitive tasks, let them handle the boring stuff so you can focus on creating better models and reports. Now think about your simulation tool as an engineer; many simulation tools have one main input file which is executed by the tool, and out come a bunch of results files. We can think of this like a black box model, where we are not so concerned about the inner details. In fact, this model can be generalized to many simulation tools important for energy analysis and building performance design. From personal experience I use this "ASCII text file input - text file output" black box model for EnergyPlus, TRNSYS, and Radiance. Wouldn't it be nice if we had a general way to modify input files and process our output files automatically? This is the subject of this blog series!  <a href="http://openrevit.com/2012/01/python-for-energy-modelers-part-2-simple-pre-processing/">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
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		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>Python for Energy Modelers &#8211; Part 1</title>
		<link>http://openrevit.com/2012/01/python-for-energy-modelers-part-1/?utm_source=rss&#038;utm_medium=rss&#038;utm_campaign=python-for-energy-modelers-part-1</link>
		<comments>http://openrevit.com/2012/01/python-for-energy-modelers-part-1/#comments</comments>
		<pubDate>Tue, 03 Jan 2012 15:43:40 +0000</pubDate>
		<dc:creator>Clayton Miller</dc:creator>
				<category><![CDATA[Development]]></category>
		<category><![CDATA[energy analysis]]></category>
		<category><![CDATA[python]]></category>

		<guid isPermaLink="false">http://openrevit.com/?p=382</guid>
		<description><![CDATA[After reading the title for this post - I know what you may be thinking - "Hey, whoa, wait a second. I'm an engineer. The learning curve for programming is too steep. There's no way I can become proficient without a huge time investment."

I used to be the same way; fighting my way through excel spreadsheets and even dabbling in a few visual basic macros to help process the data going into and coming out of energy simulation programs. The reality is that there is a better way. Through discussions with a few prominent energy modelers at the <a href="http://www.bs2011.org/">Building Simulation 2011</a> conference in Sydney in November, I decided there just isn't a 'nudge' out there to push more engineers and energy analysts towards basic proficiency in high level programming languages such as <a href="python.org/">Python</a> and <a href="http://ruby-lang.org/">Ruby</a>. This post will be the first in a series which will help the average engineer get started with scripting languages, build a few practical skills which are directly applicable to pre and post processing of data for modeling purposes, and go through a couple of these scenarios from start to finish. I have engaged the assistance of energy modeling <a href="http://www.optimalenergetics.com/">extraordinaire Marcus Jones</a> to help out with future posts on the simulation scenarios which this stuff can be useful for. <a href="http://openrevit.com/2012/01/python-for-energy-modelers-part-1/">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
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		<slash:comments>5</slash:comments>
		</item>
		<item>
		<title>New Existing Building Simulation Talking Head</title>
		<link>http://openrevit.com/2011/09/existing-building-simulation-talking-head/?utm_source=rss&#038;utm_medium=rss&#038;utm_campaign=existing-building-simulation-talking-head</link>
		<comments>http://openrevit.com/2011/09/existing-building-simulation-talking-head/#comments</comments>
		<pubDate>Wed, 21 Sep 2011 15:00:11 +0000</pubDate>
		<dc:creator>Clayton Miller</dc:creator>
				<category><![CDATA[Existing Buildings]]></category>
		<category><![CDATA[BEM]]></category>
		<category><![CDATA[energy analysis]]></category>
		<category><![CDATA[existing buildings]]></category>
		<category><![CDATA[RMI]]></category>

		<guid isPermaLink="false">http://openrevit.com/?p=296</guid>
		<description><![CDATA[Howdy folks! Due to Alan extending a warm invitation to other energy modelers out there for blog submissions, I’m making my debut as the in-house existing building energy modeling expert (the title ‘expert ‘ is used lightly at this point as I still have a lot to learn – although anyone that has suffered through one or two model calibration processes should be considered seasoned). I would like to blog about my experiences learning the ropes of calibrated modeling for existing buildings and the applications of such models in transforming the market. Thanks Alan and hope you don’t regret this! The get things going in my first post, I’m just going to give a simple shout out to the Rocky Mountain Institute who has taken the lead in promoting the use of simulation in existing buildings. While the concept is not new, whole building calibrated energy models are seldom used in the retrofit process – either because of awareness, lack of training, cost/labor restrictions, or in many cases it’s simply not necessary. However, there is a growing demand for such services due to a few market and technology catalysts starting to gain momentum (which I’ll save for later posts). RMI &#8230; <a href="http://openrevit.com/2011/09/existing-building-simulation-talking-head/">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
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		<slash:comments>2</slash:comments>
		</item>
		<item>
		<title>Green Spaces Live &#8211; a Free gbXML Tool</title>
		<link>http://openrevit.com/2011/08/green-spaces-live-free-gbxml-tool/?utm_source=rss&#038;utm_medium=rss&#038;utm_campaign=green-spaces-live-free-gbxml-tool</link>
		<comments>http://openrevit.com/2011/08/green-spaces-live-free-gbxml-tool/#comments</comments>
		<pubDate>Thu, 11 Aug 2011 14:11:15 +0000</pubDate>
		<dc:creator>Neil Bulger</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[energy analysis]]></category>
		<category><![CDATA[gbxml]]></category>

		<guid isPermaLink="false">http://openrevit.com/?p=288</guid>
		<description><![CDATA[Hi everyone, my name is Neil Bulger and I am an energy modeler for a small design MP firm on the west coast in Oakland, CA. I&#8217;m happy to join the writing team here on the openRevit site. My focus and interest in energy modeling has been to find open-source tools that can both mold to the job required and providing enough information under the hood for engineers and owners to feel comfortable with the results. Today, I&#8217;d like to share a neat tool I found a while back called Greenspaceslive (greenspacelive.com). The tool is a plugin that works with Google Sketchup and allows a 3D model of a building to be tagged with surface types and assigned to spaces, building a gbXML file that can then be exported to a number of various software tools, such as Trane Trace or in California, EnergyPro used for code compliance. While this is a free tool that can create gbXML, which is fantastic, it is not without its holes, and it has some major ones. I honestly think this is a great tool, but for purposes of today, I will talk about the shortcomings and some advice. The way the program works &#8230; <a href="http://openrevit.com/2011/08/green-spaces-live-free-gbxml-tool/">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Bentley AECOsim Energy Simulator Preview</title>
		<link>http://openrevit.com/2011/07/bentley-aecosim-energy-simulator-preview/?utm_source=rss&#038;utm_medium=rss&#038;utm_campaign=bentley-aecosim-energy-simulator-preview</link>
		<comments>http://openrevit.com/2011/07/bentley-aecosim-energy-simulator-preview/#comments</comments>
		<pubDate>Sat, 16 Jul 2011 20:36:55 +0000</pubDate>
		<dc:creator>Alan Jackson</dc:creator>
				<category><![CDATA[AECOsim]]></category>
		<category><![CDATA[EnergyPlus]]></category>
		<category><![CDATA[BEM]]></category>
		<category><![CDATA[energy analysis]]></category>

		<guid isPermaLink="false">http://openrevit.com/?p=256</guid>
		<description><![CDATA[I recently had the chance to get my hands on a second beta version of Bentley&#8217;s new AECOsim Energy Simulator for building simulation. The version I tested was v08.11.07.78. The first time I had a chance to see AECOsim was at the ASHRAE BEM Conference where it was demonstrated by Dru Crawley. Soon after I received the first Beta which was not at a good state for review. This version however is at a point where it is worth previewing. The overview of the interface is that it is built into the Bentley Microstation platform offering a familiar CAD style interface with various 2D and 3D views for model creation. Right and Left click methods and tool bars will be familiar to Microstation users, but maybe not for others. A ribbon style main toolbar now part of most modern .NET Windows applications is also available in the interface to organize the various built-in utilities and menus. I only used the application for a short period of time, so it is possible my review may touch upon areas that I did not fully understand, in which case I will update this post should I find anything was incorrect due to my inexperience. Keep reading below for my full review. I &#8230; <a href="http://openrevit.com/2011/07/bentley-aecosim-energy-simulator-preview/">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
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		<slash:comments>5</slash:comments>
		</item>
		<item>
		<title>LBNL Software Update: IGDB 18.2</title>
		<link>http://openrevit.com/2011/06/lbnl-software-update-igdb-18-2/?utm_source=rss&#038;utm_medium=rss&#038;utm_campaign=lbnl-software-update-igdb-18-2</link>
		<comments>http://openrevit.com/2011/06/lbnl-software-update-igdb-18-2/#comments</comments>
		<pubDate>Fri, 10 Jun 2011 12:37:21 +0000</pubDate>
		<dc:creator>Alan Jackson</dc:creator>
				<category><![CDATA[LBNL]]></category>
		<category><![CDATA[energy analysis]]></category>

		<guid isPermaLink="false">http://openrevit.com/?p=251</guid>
		<description><![CDATA[Dear Optics or WINDOW user: You are getting this message because you have downloaded the Lawrence Berkeley National Laboratory WINDOW or Optics software, a previous version of the IGDB, or you requested notification about new versions. The International Glazing Database (IGDB) contains spectral data used by the Optics and WINDOW programs. The most recent version of the International Glazing Database is available for download. You can update your existing database from our website at: http://windows.lbl.gov/materials/IGDB/ If you do not want to receive future emails related to the IGDB, please go to the LBNL Windows and Daylighting website and remove your name from our mailing list. To do this, click on this link: http://windows.lbl.gov/software/registration/register.asp?UserUpdate=True You will be asked to log in, and then you can Uncheck &#8220;Please Notify me of Software Updates&#8221;. If you don&#8217;t know your password, there is a link on the log-in page where you can ask for it to be e-mailed to you. Thank you for your interest in our software Robin Mitchell Christian Kohler Windows &#038; Daylighting Group Lawrence Berkeley National Laboratory]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>LBNL Software Update: IGDB 18.1</title>
		<link>http://openrevit.com/2011/04/lbnl-software-update-igdb-18-1/?utm_source=rss&#038;utm_medium=rss&#038;utm_campaign=lbnl-software-update-igdb-18-1</link>
		<comments>http://openrevit.com/2011/04/lbnl-software-update-igdb-18-1/#comments</comments>
		<pubDate>Sat, 09 Apr 2011 17:19:52 +0000</pubDate>
		<dc:creator>Alan Jackson</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[energy analysis]]></category>
		<category><![CDATA[IGDB]]></category>
		<category><![CDATA[LBNL]]></category>

		<guid isPermaLink="false">http://openrevit.com/?p=240</guid>
		<description><![CDATA[Dear Optics or WINDOW user: You are getting this message because you have downloaded the Lawrence Berkeley National Laboratory WINDOW or Optics software, a previous version of the IGDB, or you requested notification about new versions. The International Glazing Database (IGDB) contains spectral data used by the Optics and WINDOW programs. The most recent version of the International Glazing Database is available for download. You can update your existing database from our website at: http://windows.lbl.gov/materials/IGDB/ If you do not want to receive future emails related to the IGDB, please go to the LBNL Windows and Daylighting website and remove your name from our mailing list. To do this, click on this link: http://windows.lbl.gov/software/registration/register.asp?UserUpdate=True You will be asked to log in, and then you can Uncheck &#8220;Please Notify me of Software Updates&#8221;. If you don&#8217;t know your password, there is a link on the log-in page where you can ask for it to be e-mailed to you. Thank you for your interest in our software Robin Mitchell Christian Kohler Windows &#038; Daylighting Group Lawrence Berkeley National Laboratory]]></description>
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		<slash:comments>0</slash:comments>
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		<item>
		<title>Editorial: ASHRAE Energy Modeling Conference &#8212; Day 3</title>
		<link>http://openrevit.com/2011/04/editorial-ashrae-energy-modeling-conference-day-3/?utm_source=rss&#038;utm_medium=rss&#038;utm_campaign=editorial-ashrae-energy-modeling-conference-day-3</link>
		<comments>http://openrevit.com/2011/04/editorial-ashrae-energy-modeling-conference-day-3/#comments</comments>
		<pubDate>Fri, 08 Apr 2011 00:27:08 +0000</pubDate>
		<dc:creator>Alan Jackson</dc:creator>
				<category><![CDATA[Editorial]]></category>
		<category><![CDATA[BEM]]></category>
		<category><![CDATA[editorial]]></category>
		<category><![CDATA[energy analysis]]></category>
		<category><![CDATA[EnergyPlus]]></category>

		<guid isPermaLink="false">http://openrevit.com/?p=237</guid>
		<description><![CDATA[Okay, the moment we all were waiting for. And by we all I mean me. After some clear filler nonsense brought to you by Autodesk and someone featuring and Autodesk product (Ecotect), the event was closed out with an open discussion (a.k.a town hall meeting?) and presentation of the DOE road map and the unavailing of the long awaited EPGUI front-end to Energyplus brought to you by taxpayer money (DOE) and India (huh?). Previously featured in this post Before the EPGUI was demo&#8217;d, Amir Roth who has recently filled the position left by Dru Crawley, gave an opening statement on the current state of Energyplus and the development road map. Notable points from Amir from user feedback, all of which I can validate listed the following issues with Energyplus in no particular order. Speed Support Easy of use Lack of Interface Use in early concept design unclear]]></description>
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		<slash:comments>5</slash:comments>
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		<item>
		<title>Editorial: ASHRAE Energy Modeling Conference &#8212; Day 2</title>
		<link>http://openrevit.com/2011/04/editorial-ashrae-energy-modeling-conference-day-2/?utm_source=rss&#038;utm_medium=rss&#038;utm_campaign=editorial-ashrae-energy-modeling-conference-day-2</link>
		<comments>http://openrevit.com/2011/04/editorial-ashrae-energy-modeling-conference-day-2/#comments</comments>
		<pubDate>Fri, 08 Apr 2011 00:26:50 +0000</pubDate>
		<dc:creator>Alan Jackson</dc:creator>
				<category><![CDATA[Editorial]]></category>
		<category><![CDATA[BEM]]></category>
		<category><![CDATA[editorial]]></category>
		<category><![CDATA[energy analysis]]></category>
		<category><![CDATA[EnergyPlus]]></category>

		<guid isPermaLink="false">http://openrevit.com/?p=236</guid>
		<description><![CDATA[The morning started off with a long awaited demonstration of a recent build of Bentleys energy analysis offering in the the form of AECOsim representing a MicroStation front-end with the powerful Energyplus back end (v4.0?). The long short of the demonstration led by Dru Crawley, formerly of the DOE building tools group, is that they have a strong offering for the industry which I plan on doing a full in depth review of the Beta copy that was made available. Thats all I can say. Release expected in the summer of this year. Look for more info on the site. This day can be summed up rather quickly. I spent 90% of my time on the “Systems” side moderated by Philip Haves of LBNL. This was an extremely interesting series of discussions that focused on a panel of developers and software companies representing the key players on the energy modeling industry discussing in detail the way that each of there applications model a variety of building systems and situations. The panel included representatives from IES , TRNSYS, EnergyPlus, eQuest and Trane Trace. The topics included the modeling of DOAS, Radiant Systems, Lighting, Natural Ventilation, Ground Coupled Systems, Solar Thermal, Campus &#8230; <a href="http://openrevit.com/2011/04/editorial-ashrae-energy-modeling-conference-day-2/">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
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		<slash:comments>1</slash:comments>
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		<item>
		<title>Editorial: ASHRAE Energy Modeling Conference &#8212; Day 1</title>
		<link>http://openrevit.com/2011/04/editorial-ashrae-energy-modeling-conference-day-1/?utm_source=rss&#038;utm_medium=rss&#038;utm_campaign=editorial-ashrae-energy-modeling-conference-day-1</link>
		<comments>http://openrevit.com/2011/04/editorial-ashrae-energy-modeling-conference-day-1/#comments</comments>
		<pubDate>Fri, 08 Apr 2011 00:26:28 +0000</pubDate>
		<dc:creator>Alan Jackson</dc:creator>
				<category><![CDATA[Editorial]]></category>
		<category><![CDATA[BEM]]></category>
		<category><![CDATA[editorial]]></category>
		<category><![CDATA[energy analysis]]></category>
		<category><![CDATA[EnergyPlus]]></category>

		<guid isPermaLink="false">http://openrevit.com/?p=234</guid>
		<description><![CDATA[I&#8217;ll skip the fluff and head straight to the meat of the day, but I should note one thing. I was anxious for this event like a child on Christmas Eve. I knew I would be confronted with some of the “rock stars” in the world of energy modeling. This may sound lame, but I have a history with the tools and the community and it was extremely exciting and rewarding to meet and hear speak some of these individuals including folks from NREL, LBNL, ARUP and AtilierTen. Notable speaker of the day was Shanta Tucker from AtelierTen. She represented to me a veteran of the modeling industry. Someone who worked on a full range of projects and systems types and understood the way it actual is. Very well spoken and confident, I didn&#8217;t have a chance to speak with her directly but her topics were excellent. The topic of “ASHRAE 90.1: Appendix G Design Model, ASHRAE 90.1: Appendix G Baseline &#038; Design Model Differences ” was more like a war story of the way things are in the trenches. Workarounds are required and this was a resounding theme for the conference. I proceeded to the elements track were I &#8230; <a href="http://openrevit.com/2011/04/editorial-ashrae-energy-modeling-conference-day-1/">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
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		<slash:comments>1</slash:comments>
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