Tanay's profile - activity

I find that even in the AHU in Design-Builder, I cannot just have an Exhaust only system on-site level and there anyways

Modelling Exhaust Air Heat Pump Hello All, I am new to Design builder. I am trying to model an Exhaust Air Heat pump (

HVAC behaviour in Designbuilder Hello, I am currently using the "Heated Floor, Boiler HW, Nat Vent" HVAC Template for d

HVAC behaviour in Designbuilder Hello, I am currently using the "Heated Floor, Boiler HW, Nat Vent" HVAC Template for d

HVAC behaviour in Designbuilder Hello, I am currently using the "Heated Floor, Boiler HW, Nat Vent" HVAC Template for d

Ahh. Yes, this is what I want to know. How can I define loop demand in this case? Can I define the loop demand somewhere

Control of PlantEquipmentOperation:Uncontrolled Hello All, Is there any way to control the HW loop when using the Plan

Yes. Right now the Boiler is not running. I can only see the fuel consumption from the supply pump, no Gas consumption.

Control of PlantEquipmentOperation:Uncontrolled Hello All, Is there any way to control the HW loop when using the Plan

Heated Floor HVAC Setpoint Behaviour Hello All, I am working with a ZoneHVAC:LowTemperatureRadiant:VariableFlow for tw

HVAC Operation controlling Water Mass Flow Rate Hello All, I am trying to develop a control system where the idea is t

Hello Dave, Thank you for your answer. I looked into the Variable Flow control in Design builder. But I don't underst

Custom Actuator in EnergyPlus Hello All, I am trying to design a custom controller for the Low temperature heated floo

Hello All,

I am currently running OpenStudio v2.7.0 with Sketchup Pro 2017

I have a curious error.

When I create building drawings in Sketchup App and then try to run in OpenStudio, I do not get Open Studio Results. But if I create a building model within OpenStudio using FloorspaceJS, I do get the Open Studio and EnergyPlus Results in the run.

Is there a setting that I have to check/set in the Sketchup or OpenStudio Application to get the Open Studio Results?

OpenStudio Run does not show OSM results Hello All, I am currently running OpenStudio v2.7.0 with Sketchup Pro 2017 I

Hello All,

I am making a simple PID controller in BCVTB using EnergyPlus. In my model, I have a Simulator actor(called HouseModel in the image) that connects to EnergyPlus (v9.0.1). It takes setpoint temperature for cooling an heating thermostat as inputs array (for example, [16; 20]).

In the SystemCommnad actor (called PyController in the image), I have written a P-controller in Python file, as shown below,

import sys

setRef = sys.argv[1]
currTemp = sys.argv[2]

error = float(setRef) - float(currTemp)

# P-Controller
kP = 10
out = kP*error

value = {out, 20}
print(value)

sys.exit(0)

As the EnergyPlus model is expecting an array input, how do I convert the Output of the PyController to a usable array for HouseModel?

I also thought of using FileReader actor in Ptolemy and write the values in the file and then read it from them, but I could not find any good example of that to see how exactly I can use it.

If you have any good examples, I will love to try them.

Hello All,

EnergyPlus Version: 9.0.1 BCVTB Version: 1.6.0 (April 20, 2016) Ptolemy 2 Version: 11.0 (devel)

I am new to BVCTB and EnergyPlus and trying to learn the SW by trying different examples.

Following one of the examples, I created a very simple EnergyPlus .idf file where I am trying to just plot the Output Variables on BCVTB Plotter.

https://imgur.com/XtptEGD

Following is the .cfg file I made,

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE BCVTB-variables SYSTEM "variables.dtd">
<BCVTB-variables>
  <!-- The elements received from the EnergyPlus -->
  <variable source="EnergyPlus">
   <EnergyPlus name="ENVIRONMENT" type="Site Outdoor Air Drybulb Temperature"/>     
  </variable>
  <variable source="EnergyPlus">
    <EnergyPlus name="ZSF1" type="Zone Air Temperature"/>
  </variable>
</BCVTB-variables>

In the IDF file, I have only three OutPut Variables

Output:Variable,*,Zone Air Temperature,Detailed;
Output:Variable,*,Site Outdoor Air Drybulb Temperature,Timestep;
Output:Variable,*,Zone Air Temperature,Timestep;

As I do not have any input to the EnergyPlus I did not use the ExternalInterface in the IDF.

Now, I checked the .IDF file runs perfectly okay in the EnergyPlus and produces outputs with no Severe Error. Also, when I run the file with BCVTB, it shows no error on EnergyPlus.

But, I am getting a SocketTimeoutException error and does not show any plot. It does not even open any plot window. I tried increasing the 'socketTimeout' to 10000 but still the same error.

So you know why do I have this error and how I can resolve it?

The link below have all the documents for the model (.idf, .xml, .cfg) https://drive.google.com/drive/folder...

BCVTB Data Conversion Hello All, I am making a simple PID controller in BCVTB using EnergyPlus. In my model, I have a

If I understand correctly, even if I am not sending any data to the EnergyPlus from Ptolemy, I still need to have the Ex

Hello All,

I am using EnergyPlus v9.0.1 with BCVTB (v1.6). While running the BCVTB Example with IDF file SmOffPSZ.idf I noticed that the simulation starts at 01/01/2017 for RUNPERIOD1 and subsequent one are on 01/21/2017, 02/10/2017, 03/02/2017 ...

In my IDF file I have RunPeriod object as,

And SimulationControl as,

I am using a weather file for STOCKHOLM_ARLANDA, WeatherFile

Now I don't understand why the simulation starts in the year 2017 and also why it jumps 21 days? I tried reading the InputOutput Reference from EnergyPlus, but it was not clear why this is happening.

Explanation on RunPeriod in EnergyPlus Hello All, I am using EnergyPlus v9.0.1 with BCVTB (v1.6). While running the BC

Error Installing MLE+ with MATLAB 2019a Hello All, I am using MATLAB 2019a and EnergyPlus 9.0.1 on Windows 10 and tryin

BCVTB with EnergyPlus Hello All, EnergyPlus Version: 9.0.1 BCVTB Version: 1.6.0 (April 20, 2016) Ptolemy 2 Version: 11

BCVTB with EnergyPlus Hello All, EnergyPlus Version: 9.0.1 BCVTB Version: 1.6.0 (April 20, 2016) Ptolemy 2 Version: 11

BCVTB with EnergyPlus Hello All, EnergyPlus Version: 9.0.1 BCVTB Version: 1.6.0 (April 20, 2016) Ptolemy 2 Version: 11

Hello, I am a complete NOOB on EnergyPlus (E+). I just started looking into it and have spent only 2 days learning the E+ with some tutorials mentioned in the documentation. My goal is to simulate a custom PID controller for the underfloor heating system on a residential building.

From the tutorials, I understand how I can create .IDF file and simulate them with the WeatherData using DOS commands. I also checked that I can use Eppy (Python Library, https://eppy.readthedocs.io) to create/edit/start simulation for E+.

I found (from the documentation) that I can create custom controllers using ERL. I am wondering if there is any Python Library for running ERL from Python itself? It can be either Python v3 or Python v2.

P.S - I haven't read the ERL documentation fully yet.

Python Library for EnergyPlus Runtime Language (ERL) Hello, I am a complete NOOB on EnergyPlus (E+). I just started look