Anna's profile - activity

Here is my email address, if you don't mind sharing the file:

There seem to be no difference in SEER/HSPF between 9.4.0 and v23.1, but V23.1 also reports SEER2/HSPF2. Thanks for the

Richard, thank you very much for looking into this! I did not review the file yet, but will do that asap. To answer your

Hi Richard, Here is the link to IDF and manufacturer data: https://jordanskala-my.sharepoint.com/:f:/p/adavidovic/Eo4x

Here is my email address, if you don't mind sharing the file: ananeddav@hotmail.com.

Hi Richard, Yes , I entered the evaporator fan power w/cfm for this specific HP model. This increased SEER a little bit,

Sure, I would appreciate that very much. Could you share the link here, or should I provide my email address? I'm just t

Hi Jim, Thanks for your response! I read that SEER for Multi Speed DX coil and HSPF are supposed to be calculated as we

SEER and HSPF in E+/Design Builder Has anyone observed a big difference between SEER/HSPF reported in the Equipment Summ

A pre-conference workshop at ASHRAE BPA 2017 will present new features of eQUEST and DOE-2, including a new stand-alone dedicated outdoor system and a detailed variable refrigerant flow system model. Are there any details available about the most recent DOAS enhancement in eQUEST? Any information on when a new version of eQUEST will be released? Thanks,

Great, Thank you!

The most recent version of eQuest build 7175 was released in Oct 2018. It was my understanding that this version was sup

Thank you, Dave. I've raised the ticket. I'm just really looking for some rough estimate, that would help me figure out

I takes 7 minutes to run the IDF in EP Launch, which is two times faster than running the same model in DesignBuilder. I

Thank you, Dave. I've raised the ticket. I'm just really looking for some rough estimate, that would help me figure out

DesignBuilder simulation-time Hi All, How much time do you expect a simulation (15,000 sf, 20 zone, 16 HVAC systems, 6

Geraldo, Have you arrived to final answer to this question? I’ve noticed in several E+ models that the HVAC systems hav

For this particular zone, the zone level cooling peak occurs at 15:00 pm. The cooling peak does not occur at the same ti

Cooling Load for Interzone Wall negative? I noticed that the auto-sized air flow of my VAV system is much lower that the

Cooling Load for Interzone Wall negative? I noticed that the auto-sized air flow of my VAV system is much lower that the

The model geometry was generated in OpenStudio. Construction of interior walls in E+ is : 19mm gypsum board, Wall air sp

Cooling Load for Interzone Wall negative? I noticed that the auto-sized air flow of my VAV system is much lower that the

Cooling Load for Interzone Wall negative? I noticed that the auto-sized air flow of my VAV system is much lower that the

Cooling Load for Interzone Wall negative? I noticed that the auto-sized air flow of my VAV system is much lower that the

Cooling Load for Interzone Wall negative? I noticed that the auto-sized air flow of my VAV system is much lower that the

Cooling Load for Interzone Wall negative? I noticed that the auto-sized air flow of my VAV system is much lower that the

Cooling Load for Interzone Wall negative? I noticed that the auto-sized air flow of my VAV system is much lower that the

How to specify Supply Air flow at VAV I’m trying to model a VAV system with reheat in E+, which I believe should not be

Cooling Load for Interzone Wall negative? I noticed that the auto-sized air flow of my VAV system is much lower that the

Cooling Load for Interzone Wall negative? I noticed that the auto-sized air flow of my VAV system is much lower that the

Cooling Load for Interzone Wall negative? I noticed that the auto-sized air flow of my VAV system is much lower that the

Cooling Load for Interzone Wall negative? I noticed that the auto-sized air flow of my VAV system is much lower that the

Yes, I did specify Supply Fan Maximum Flow Rate and Supply Fan Minimum Flow Rate. System Availability Schedule should b

Did you make any changes to Site:Location and SizingPeriod:DesignDay?

Yes, this helps. Thank you!

DOAS enhancements in eQUEST ? A pre-conference workshop at ASHRAE BPA 2017 will present new features of eQUEST and DOE-2

Maybe I need to rephrase my question a bit to make it less specific to this project. Let’s assume that a VAV system is c

Thank you for reminding me of the rules. Yes, this is E+ 8.0. The model was built a few years ago, and I’m trying to fin

How to specify Supply Air flow at VAV Hi Everyone, I’m trying to model a VAV system with reheat in E+, which I believe

Agreed. Modeling the same rated cooling efficiency with an auto-sized chiller capacity in the Baseline model should be g

Hi, It is a bit unclear how the space cooling is provided in the actual design (proposed model)? I assume that the spac

Matthew, thank you for your detailed response. I was able to create some very complex geometry quickly using SketchUp/OpenStudio, but I didn't try to write any OpenStudio measures, and that should be my next step. Most of the projects I do are LEED or code compliance models, where equipment autosizing is not allowed. It sounds that OpenStudio measures would allow me to create HVAC systems for certain zones, but I would still have to manually specify individual equipment capacities/efficiencies etc., according to the mechanical schedules. Is that correct?

Dave, thanks for replying to my post. As soon as I can make some time in my schedule, I will download a free 30day trial of DesignBuilder. Would the 30day trial give me an access to Engineering Plus/Pro version that have Scripting included?

Thanks for sharing your experience. From your response, it sounds like Design Builder is very similar to eQuest. With eQuest, simple HVAC is created in Wizard, and then more detailed input or additional HVAC systems are created in Detailed mode. I found that ability to visually see HVAC and respective zone is a huge time saver, especially when I have to go back to old models to make some quick changes. Can you share a few examples of the more complex HVAC when writings scripts in DB would be necessary? Thanks again!

I’m trying to figure out if there are some advantages in using Design Builder over OpenStudio. For example, would Design Builder allow me to create some more complex HVAC systems (such as DOAS with radiant slabs, or central ground source heat pump, etc.) and export an IDF file including the detailed HVAC components?

Can you guys share your thoughts about advantages/disadvantages of Design Builder over OpenStudio? I’m asking this question because I need some reality check in terms of time I spend on my models and would greatly appreciate any suggestion.

I used OpenStudio for several projects, but found specifying HVAC parameters in Open Studio time consuming and difficult (a lot of errors). To avoid many errors in HVAC, I would just create geometry and assign attributes in OpenStudio, and create all HVAC systems directly in IDF file by using E+. The building size I typically have to model is 150,000 sf to 200,000 sf.

How many of HVAC components/ controls, in general, are you guys able to specify in Open Studio before switching to E+ ( idf) for this building size? Also, how much time roughly does it take for you to complete a model with standard systems ( e.g. VAV w/ boiler chiller) and a model with a more complex system ( e.g., radiant slabs with with DOAS w/ DCV providing ventilation air directly to the spaces)? Let’s assume that the building has 150,000 sq.ft and a simple rectangular shape.