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2018-04-04 08:39:50 -0500 edited question ASHRAE System for Server / Computer Room

ASHRAE System for Server Room I have a Baseline model with a server room. I was wondering what the prescribed system wou

2018-04-04 08:37:00 -0500 marked best answer ASHRAE System for Server / Computer Room

I have a Baseline model with a server room. I was wondering what the prescribed system would be following ASHRAE Appendix G?

A PTAC seems like the most straightforward answer but is there a baseline system type I should use for this space?

Currently the space is keeping a constantly load on the central chiller, producing 4000+ hour a year below a 10 percent part load, which is obviously unrealistic.

2018-04-04 08:36:59 -0500 commented answer ASHRAE System for Server / Computer Room

Thank you for your answer, this was the perfect response.

2018-04-03 17:08:14 -0500 commented answer Energyplus example error

The timestep in all the simulations need to match.

2018-04-03 17:06:42 -0500 asked a question ASHRAE System for Server / Computer Room

ASHRAE System for Server Room I have a Baseline model with a server room. I was wondering what the prescribed system wou

2018-03-12 08:29:10 -0500 marked best answer DView Loading Data Extremely Slowly

OpenStudio now uses DView directly for data visualization instead of ResultsViewer. However, while trying to open data dview takes several minutes (sometimes 15 or more) just to open a small output file. Are there any fixes I can do to that will make this process faster?

In the meantime, I will likely need to use another results viewer because this is too slow.

2018-03-09 10:30:15 -0500 commented answer DView Loading Data Extremely Slowly

Hi Eric, I am on Windows 10. I am trying to open the sql file that is about 45mb and not converted to IP. Thank you for

2018-03-09 09:38:03 -0500 asked a question DView Loading Data Extremely Slowly

DView Loading Data Extremely Slowly OpenStudio now uses DView directly for data visualization instead of ResultsViewer.

2018-03-07 12:24:52 -0500 commented answer Heat Exchanger to Preheat Service/Domestic Hot Water

Julien, I am just seeing this response. Thank you for your time. I believe I understand now. It appears as though I can

2018-02-12 13:49:00 -0500 commented answer What are some good programs/applications to use as a text editor for EnergyPlus models?

@eayoungs, would you mind uploading your syntax files again? The GitHub link you provided no longer appears to work. @

2017-12-07 09:46:41 -0500 commented answer Heat Exchanger to Preheat Service/Domestic Hot Water

I setup a PlantEquipmentList with the HX before the boiler but found that the HX still has no effect on reducing the nat

2017-12-06 19:22:11 -0500 commented answer Heat Exchanger to Preheat Service/Domestic Hot Water

I setup a PlantEquipmentList with the HX before the boiler but found that the HX still has no effect on reducing the nat

2017-12-06 19:19:19 -0500 commented answer Heat Exchanger to Preheat Service/Domestic Hot Water

I setup a PlantEquipmentList with the HX before the boiler but found that the HX still has no effect on reducing the nat

2017-12-06 14:33:16 -0500 commented answer Heat Exchanger to Preheat Service/Domestic Hot Water

Hi Julien, thank you for your response. I had the Control Type set to HeatingSetpointOnOff, I will try HeatingSetpoint:M

2017-12-05 17:11:53 -0500 asked a question Heat Exchanger to Preheat Service/Domestic Hot Water

Heat Exchanger to Preheat Service/Domestic Hot Water I would like to preheat water into a WaterHeater:Mixed with the use

2017-10-26 13:48:59 -0500 marked best answer Data Viewer like DView but for Sub-hourly Data

I really like the data viewer, DView for reading and formatting hourly data. However, a limitation of DView is that it cannot read sub-hourly timestep data.

Are there any alternative data viewing and formatting tools for reading output data from EnergyPlus that is sub-hourly?

2017-10-26 13:48:50 -0500 commented answer Data Viewer like DView but for Sub-hourly Data

Hi Aaron, thank you for your answer, this was very helpful. I prefer DView over Results Viewer but it solved my problem.

2017-10-26 13:47:35 -0500 commented question Data Viewer like DView but for Sub-hourly Data

Hi Eric, this is perfect! Thank you. I wish you posted as an answer so that I can mark it as correct.

2017-10-25 15:48:28 -0500 asked a question Data Viewer like DView but for Sub-hourly Data

Data Viewer like DView but for Sub-hourly Data I really like the data viewer, DView for reading and formatting hourly da

2017-10-12 12:32:47 -0500 commented answer Solar study for simple building

The OS GUI has limited assess to output variables. If you would like to add custom variables that are a part of the *.rd

2017-10-11 12:52:26 -0500 commented answer MLE+ cosimulation. Obtaining outputs without controlling

Ah apologies, I hadn't realized that they changed the source code. Thank you for the quick response.

2017-10-11 12:49:44 -0500 answered a question Solar study for simple building

I suspect that the easier method would be to isolate the output variables that give you this information. These output v

2017-10-11 12:31:32 -0500 commented answer MLE+ cosimulation. Obtaining outputs without controlling

@thierry nouidui can you assist @marinafs1 on documentation or how to format the input for the E+ Co-Simulation block in

2017-10-11 12:31:25 -0500 commented answer MLE+ cosimulation. Obtaining outputs without controlling

@thierry-nouidui can you assist @marinafs1 on documentation or how to format the input for the E+ Co-Simulation block in

2017-08-04 14:33:18 -0500 answered a question Initialize or Start WaterHeater:Mixed Cold

I found a potential fix, although it may not be the best answer. I was able to start the tank cold and keep it cold by s

2017-08-03 19:22:40 -0500 edited question Initialize or Start WaterHeater:Mixed Cold

Initialize or Start WaterHeater:Mixed Cold I am attempting to model a solar hot water collector in combination with a lo

2017-08-03 18:16:45 -0500 edited question Initialize or Start WaterHeater:Mixed Cold

Initials or Start WaterHeater:Mixed Cold I am attempting to model a solar hot water collector in combination with a Wate

2017-08-03 18:16:36 -0500 asked a question Initialize or Start WaterHeater:Mixed Cold

Initials or Start WaterHeater:Mixed Cold I am attempting to model a solar hot water collector in combination with a Wate

2017-07-31 08:13:18 -0500 marked best answer How does "autosized" work in EnergyPlus OpenStudio with External Inputs?

I am using a PlantComponent:TemperatureSource connected to a WaterHeater:Mixed which is then connected to a ZoneHVAC:Baseboard:Convective:Water. I had a few of these components set to autosize but realize they might not be receiving enough information during the design days. I am running the energy model in a co-simulation with another program that, during runtime, feeds in the temperature of the PlantComponent:TemperatureSource and the Mass Flow rate of a pump. Unfortunately, none of this information is passed during the design days.

My question is, how does EnergyPlus autosize equipment? Does it only look at the design days to find the most extreme conditions?

Additionally, because I'm not feeding in the temperature and flowrate values prior to the run period, is there anyway I can still have parts of the connected plant loops autosize?

2017-07-31 08:13:15 -0500 commented answer How does "autosized" work in EnergyPlus OpenStudio with External Inputs?

This is a very good write-up, thank you for taking the time to type everything out so clearly. Understanding that autosi

2017-07-27 17:12:56 -0500 asked a question How does "autosized" work in EnergyPlus OpenStudio with External Inputs?

How does "autosized" work in EnergyPlus OpenStudio with External Inputs? I am using a PlantComponent:TemperatureSource c

2017-07-20 18:28:20 -0500 edited question How to Model a Simple Cooling Panel in OpenStudio

Simple Cooling Panel in OpenStudio I have successfully added a ZoneHVAC:Baseboard:Convective:Water and had success with

2017-07-20 18:28:09 -0500 asked a question How to Model a Simple Cooling Panel in OpenStudio

Simple Cooling Panel in OpenStudio I have successfully added a ZoneHVAC:Baseboard:Convective:Water and had success with

2017-07-19 18:02:18 -0500 commented answer MLE+ cosimulation. Obtaining outputs without controlling

Have you tried setting up an input into EnergyPlus, even if it's not used for anything within EnergyPlus?

2017-07-19 13:46:16 -0500 commented answer MLE+ cosimulation. Obtaining outputs without controlling

I'm not sure what those errors mean. Are you using the EnergyPlusToFMU tool (http://simulationresearch.lbl.gov/fmu/Energ

2017-07-18 11:22:47 -0500 edited question Matching Boiler:HotWater with a WaterHeater:Mixed

Boiler Source Temperature I am attempting to model a WaterHeater:Mixed the same as a Boiler:HotWater. I know that the

2017-07-18 11:22:19 -0500 asked a question Matching Boiler:HotWater with a WaterHeater:Mixed

Boiler Source Temperature I am attempting to model a WaterHeater:Mixed the same as a Boiler:HotWater. I know that the

2017-06-26 11:06:11 -0500 edited answer MLE+ cosimulation. Obtaining outputs without controlling

I suspect that you will need to add an ExternalInterface:FuctionalMockupExport:To:Schedule (Variable or Actuator). In ot

2017-06-26 07:37:37 -0500 answered a question MLE+ cosimulation. Obtaining outputs without controlling

I suspect that you will need to add an 'ExternalInterface:FuctionalMockupExport:To:Schedule(or variable or actuator)'. I

2017-03-08 07:12:15 -0500 marked best answer FMU Export of Python Code or Python Interface with FMI Standard for Use in EnergyPlus Co-Simulation

My research group has developed python code for a new building component that we would like to co-simulate with EnergyPlus. For reuseability and market impact we would like this connection to be as easy as possible for inexperienced users and believe packing the model using the Function Mockup Interface Standard (FMI) to be the best option.

We have explored JModelica to test other Functional Mockup Units (FMUs) but found that it does not do FMU export of Python code for model exchange or co-simulation.

I was curious if there any methods for packaging python code as an FMU? If there is not, is there another way of linking Python to the FMI standard or connecting it to a building energy software like EnergyPlus?

The alternative to this would be exporting the building energy model as an FMU and import into modelica/jmodelica or using BCVTB. Although this would work for us we worry it would make it too difficult for inexperienced individuals to use our tool.

2017-02-07 15:29:58 -0500 commented answer I want a site with constant temperature and 0 solar radiation how to edit weather files

Hi @carlobianchi89, you will want to use the EnergyPlus component Schedule:File. The name of the Schedule:File component will be used as your variable name for the SET oDBT = Schedule:File Name. See page 76 of the EnergyPlus Input Output Reference Manual to learn how to use Schedule:File (https://energyplus.net/sites/default/...). Also, look at the EnergyPlus EMS Manual, there may be an example of how to use a Schedule:File as an input variable in an EMS program.

2016-12-11 15:17:50 -0500 marked best answer EnergyPlus Parameterize an IMF for Parametric Simulation

I'm aware of how to do a parametric run in an IDF file but when attempted in an IMF I receive errors. Is it possible to do parametric simulations directly in the IMF file? If so, what is the syntax?