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2019-03-14 14:51:54 -0500 marked best answer Heat Exchanger with autosized flow rate generates warning about flow rate

I have a HeatExchanger:AirToAir:SensibleAndLatent object that is generating this error.

** Warning ** HeatExchanger:AirToAir:SensibleAndLatent "DOAS HEAT RECOVERY"
**   ~~~   ** Average air volume flow rate is <50% or >130% of the nominal HX supply air volume flow rate.
**   ~~~   ** Air volume flow rate ratio = 0.446. Environment=MIAMI INTL AP ANN HTG 99.6% CONDNS DB, at Simulation time=01/21 00:00 - 00:15

*************  ** Warning ** HeatExchanger:AirToAir:SensibleAndLatent "DOAS HEAT RECOVERY":  Average air volume flow rate is <50% or >130% warning continues. Air flow rate ratio statistics follow.
*************  **   ~~~   **   This error occurred 830 total times;
*************  **   ~~~   **   during Warmup 0 times;
*************  **   ~~~   **   during Sizing 0 times.
*************  **   ~~~   **   Max=0.499836  Min=0.438976

Looking in the engineering reference,

image description

but the Nominal Supply Air Flow Rate field is autosized.

image description

Is there a recommended way to fix the error?

2019-03-14 13:56:34 -0500 asked a question Heat Exchanger with autosized flow rate generates warning about flow rate

Heat Exchanger with autosized flow rate generates warning about flow rate I have a HeatExchanger:AirToAir:SensibleAndLat

2019-03-11 17:21:37 -0500 edited question Control of Chiller with Thermal Energy Storage

Control of Chiller with Thermal Energy Storage I was trying to figure out what all the controlling objects do in the exa

2019-03-11 16:39:34 -0500 edited question Control of Chiller with Thermal Energy Storage

Control of Chiller with Thermal Energy Storage I was trying to figure out what all the controlling objects do in the exa

2019-03-07 16:25:05 -0500 edited question Control of Chiller with Thermal Energy Storage

Control of Chiller with Thermal Energy Storage I was trying to figure out what all the controlling objects do in the exa

2019-03-07 11:26:17 -0500 asked a question Control of Chiller with Thermal Energy Storage

Control of Chiller with Thermal Energy Storage I was trying to figure out what all the controlling objects do in the exa

2019-03-06 11:19:58 -0500 commented answer Access tomorrow's weather data using EMS

@rraustad I'm hoping for something more automatic. I have a measure that adds the ice storage tank, controlling objects,

2019-03-06 11:03:50 -0500 edited question Access tomorrow's weather data using EMS

Access tomorrow's temperature using EMS I'm trying to control the charging of a thermal energy storage object in energyp

2019-03-06 11:03:12 -0500 asked a question Access tomorrow's weather data using EMS

Access tomorrow's temperature using EMS I'm trying to control the charging of a thermal energy storage object in energyp

2019-03-06 09:41:01 -0500 received badge  Organizer (source)
2019-03-06 09:40:22 -0500 commented question Slab objects used in the DOE prototype models

@shorowit Okay. I'm going to go ahead and remove the please-use-existing-tags tag then.

2019-03-06 09:32:22 -0500 marked best answer kiva autocalculated deep ground depth (-0.919 m)???

I took the example files for the kiva objects, ZoneCoupledKivaSlab.idf and ZoneCoupledKivaBasement.idf, and changed the Site:Location, SizingPeriod:DesignDay objects, and weather file for each of the CA climate zones. There are some strange errors for the "autocalculated deep ground depth" in some of the simulations. Obviously, something is wrong. Here is a google drive link to the files.

I'll report this as a bug on github, but my question right now is: Is there a field in Energyplus I can use to override the faulty behavior?

ZoneCoupledKivaSlab.idf

Foundation:Kiva="SLAB FOUNDATION", the autocalculated deep ground depth (1.328 m) is shallower than foundation construction elements (1.500 m)

Foundation:Kiva="SLAB FOUNDATION", the autocalculated deep ground depth (-0.919 m) is shallower than foundation construction elements (1.500 m)

ZoneCoupledKivaBasement.idf

Foundation:Kiva="BASEMENT FOUNDATION", the autocalculated deep ground depth (1.328 m) is shallower than foundation construction elements (3.425 m)

Foundation:Kiva="BASEMENT FOUNDATION", the autocalculated deep ground depth (3.883 m) is shallower than foundation construction elements (3.425 m)

Foundation:Kiva="BASEMENT FOUNDATION", the autocalculated deep ground depth (-0.919 m) is shallower than foundation construction elements (3.425 m)
2019-03-06 09:27:22 -0500 commented answer When do you actually need a bypass pipe?

@MJWitte I'm automating generation of building models, and one of the automations adds in a tempering valve, which means

2019-03-05 17:30:18 -0500 commented answer How can I use the Slab Preprocessor when the floor is not insulated ?

@tassimo4.0 By the way, you might want to just use the Kiva software directly instead of using it through energyplus if

2019-03-05 17:21:53 -0500 edited answer How to stop chiller from running while thermal energy storage still has capacity?

I was dismayed when I found that even the IceStorage-Parallel.idf did not work as I had hoped. Charging and discharging

2019-03-05 17:21:16 -0500 answered a question How to stop chiller from running while thermal energy storage still has capacity?

I was dismayed when I found that even the IceStorage-Parallel.idf did not work as I had hoped. Charging and discharging

2019-03-05 17:10:04 -0500 commented answer When do you actually need a bypass pipe?

@MJWitte I'm automating generation of building models, and one of the automations adds in a tempering valve, which means

2019-03-05 11:15:13 -0500 commented answer kiva autocalculated deep ground depth (-0.919 m)???

@Neal Kruis Thanks! That worked. One more thing, it's autoselect not autocalculate in the idf editor.

2019-03-05 10:58:10 -0500 commented answer kiva autocalculated deep ground depth (-0.919 m)???

@Neal Kruis Okay. That handles that. I was poking around a bit to see if I could get rid of the warning though, found th

2019-03-05 10:25:25 -0500 commented answer kiva autocalculated deep ground depth (-0.919 m)???

@Neal Kruis Okay. That handles the negative values. What about the second warning in the basement simulation about 3.883

2019-03-05 10:12:55 -0500 edited question kiva autocalculated deep ground depth (-0.919 m)???

kiva autocalculated deep ground depth (-0.919 m)??? I took the example files for the kiva objects, ZoneCoupledKivaSlab.i

2019-03-05 10:09:11 -0500 asked a question kiva autocalculated deep ground depth (-0.919 m)???

kiva autocalculated deep ground depth (-0.919 m)??? I took the example files for the kiva objects, ZoneCoupledKivaSlab.i

2019-03-01 13:36:58 -0500 commented answer How can I use the Slab Preprocessor when the floor is not insulated ?

@tassimo4.0 Please change the accepted answer to @Aaron Boranian's. Kiva definitely seems like the way to go!

2019-03-01 13:35:24 -0500 commented answer How can I use the Slab Preprocessor when the floor is not insulated ?

@Aaron Boranian This looks really good! Are there any shortcomings of this method as compared to the Slab and Basement p

2019-03-01 11:43:35 -0500 edited answer How can I use the Slab Preprocessor when the floor is not insulated ?

I'm wondering if the Slab preprocessor is useful in predicting accurate GS-temperature of the non-insulated ground su

2019-03-01 10:37:24 -0500 edited answer How can I use the Slab Preprocessor when the floor is not insulated ?

I'm wondering if the Slab preprocessor is useful in predicting accurate GS-temperature of the non-insulated ground su

2019-03-01 10:21:59 -0500 marked best answer Restrict tag choice to existing tags instead of adding the please-use-existing-tags tag? And what qualifies as an existing tag?

I don't see the purpose of the please-use-existing-tags tag. As far as I know, the tags are meant to associate a post to certain topics represented by tags. In which case, I don't know why anyone would want to look up all posts with the please-use-existing-tags tag, especially when the nonexisting tags may have already been changed to existing tags in the post.

Is it possible instead to restrict users choice of tags rather than letting users have the ability to type in any tag whatsoever?


Post Script
Also, what are considered existing tags? I did find the list of tags, but rarity of use didn't necessarily imply an unhelpful tag, although that was usually the case.

For example, "tdv" is a very specific tag, but also its own little topic within energy modelling. In contrast, "getting" does not seem like a very useful tag.

image description

2019-03-01 09:40:30 -0500 commented answer Restrict tag choice to existing tags instead of adding the please-use-existing-tags tag? And what qualifies as an existing tag?

@__AmirRoth__ That's kind of a circular problem though. The people that poorly tag posts typically do not provide nearly

2019-02-28 18:07:38 -0500 commented answer How can I use the Slab Preprocessor when the floor is not insulated ?

@tassimo4.0 By chance I'm working on some building models that I need to run the Slab and Basement preprocessors for and

2019-02-28 17:59:02 -0500 commented question Slab objects used in the DOE prototype models

@shorowit Which of the tag(s) should be removed by the way?

2019-02-28 17:29:36 -0500 commented question Restrict tag choice to existing tags instead of adding the please-use-existing-tags tag? And what qualifies as an existing tag?

@Aaron Boranian I agree. I've also entered tags before that were sort of the best I could think of when I wrote the post

2019-02-28 17:29:23 -0500 commented question Restrict tag choice to existing tags instead of adding the please-use-existing-tags tag? And what qualifies as an existing tag?

I agree. I've also entered tags before that were sort of the best I could think of when I wrote the post, but a moderato

2019-02-28 16:41:23 -0500 edited question Restrict tag choice to existing tags instead of adding the please-use-existing-tags tag? And what qualifies as an existing tag?

Restrict tag choice to existing tags instead of adding the please-use-existing-tags tag??? I don't see the purpose of th

2019-02-28 09:47:24 -0500 edited question Restrict tag choice to existing tags instead of adding the please-use-existing-tags tag? And what qualifies as an existing tag?

Restrict tag choice to existing tags instead of adding the please-use-existing-tags tag??? I don't see the purpose of th

2019-02-28 09:46:32 -0500 edited question Restrict tag choice to existing tags instead of adding the please-use-existing-tags tag? And what qualifies as an existing tag?

Restrict tag choice to existing tags instead of adding the please-use-existing-tags tag??? I don't see the purpose of th

2019-02-28 09:38:18 -0500 asked a question Restrict tag choice to existing tags instead of adding the please-use-existing-tags tag? And what qualifies as an existing tag?

Restrict tag choice to existing tags instead of adding the please-use-existing-tags tag??? I don't see the purpose of th

2019-02-28 09:22:24 -0500 commented answer How can I use the Slab Preprocessor when the floor is not insulated ?

@tassimo4.0 You're welcome. And please mark the answer as accepted.

2019-02-27 15:24:53 -0500 commented answer How can I use the Slab Preprocessor when the floor is not insulated ?

@tassimo4.0 Old as in the Slab code was written a long time ago. As for modeling, I don't know of any other easy way to

2019-02-27 10:26:57 -0500 edited answer How can I use the Slab Preprocessor when the floor is not insulated ?

I'm wondering if the Slab preprocessor is useful in predicting accurate GS-temperature of the non-insulated ground su

2019-02-27 10:26:32 -0500 edited answer How can I use the Slab Preprocessor when the floor is not insulated ?

I'm wondering if the Slab preprocessor is useful in predicting accurate GS-temperature of the non-insulated ground su

2019-02-27 10:25:32 -0500 answered a question How can I use the Slab Preprocessor when the floor is not insulated ?

I'm wondering if the Slab preprocessor is useful in predicting accurate GS-temperature of the non-insulated ground su

2019-02-27 10:13:41 -0500 edited question How can I use the Slab Preprocessor when the floor is not insulated ?

How can I use the Slab Preprocessor when the floor is not insulated ? Since the ground site temperature is a key factor

2019-02-26 11:15:08 -0500 asked a question How to stop chiller from running while thermal energy storage still has capacity?

How to stop chiller from running while thermal energy storage still has capacity? I'm looking into the IceStorage-Series

2019-02-25 09:48:14 -0500 edited question Slab objects used in the DOE prototype models

Slab objects used in the DOE prototype models From a very good answer from this post, I got some background on the DOE p

2019-02-24 11:26:04 -0500 edited question Slab objects used in the DOE prototype models

Slab objects used in the DOE prototype models From a very good answer from this post, I got some background on the DOE p

2019-02-22 11:54:37 -0500 edited question Slab objects used in the DOE prototype models

Slab objects used in the DOE prototype models From a very good answer from this post, I got some background on the DOE p

2019-02-22 11:51:49 -0500 commented question Slab objects used in the DOE prototype models

@mdahlhausen I just added a picture of some Slab and Basement objects to the post. I was not aware that Slab can be run