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2021-05-31 08:27:59 -0600 commented question Openstudio shuts down at start window

Never mind about my idea since I no longer think it applies. You must not be in a remote session since your screenshot t

2021-05-31 08:20:17 -0600 commented answer Error Loading OpenStudio SketchUp Plug-in

Yes, the file permissions look good, I have full access to C, Windows did not detect file corruption, and I tried disab

2021-05-25 11:38:12 -0600 commented answer Error Loading OpenStudio SketchUp Plug-in

I have write access to C. In any case, the executable file will not open so I cannot choose the installation directory.

2021-05-24 19:48:19 -0600 commented answer Error Loading OpenStudio SketchUp Plug-in

When I try to install the exe file on my Windows computer, I get the following error even if I open the file as an admin

2021-05-24 19:26:12 -0600 commented question Openstudio shuts down at start window

Are you in a remote desktop session? Sketchup doesn't support opening the application while in a remote desktop session,

2021-05-21 11:23:10 -0600 edited question Central air-to-water gas absorption heat pump for domestic hot water

Central air-to-water gas absorption heat pump for domestic hot water What is the best way to model a central air-to-wate

2021-05-21 11:22:27 -0600 commented question Central air-to-water gas absorption heat pump for domestic hot water

Thanks, sashadf1. Here is a link to "Prototype.CentralAirSourceHeatPump.rb".

2021-05-21 09:50:00 -0600 commented question Central air-to-water gas absorption heat pump for domestic hot water

Thanks, sashadf1. I just edited my question above to include a link to that openstudio-standards file.

2021-05-18 16:17:59 -0600 asked a question Central air-to-water gas absorption heat pump for domestic hot water

Central air-to-water gas absorption heat pump for domestic hot water What is the best way to model a central air-to-wate

2021-05-18 16:17:51 -0600 asked a question Central air-to-water gas absorption heat pump for domestic hot water

Central air-to-water gas absorption heat pump for domestic hot water What is the best way to model a central air-to-wate

2018-03-21 19:17:03 -0600 received badge  Autobiographer
2018-03-21 19:01:28 -0600 edited question Outside air reset for a boiler with a primary-secondary loop

Outside air reset for a boiler with a primary-secondary loop What is the recommended method to implement outside air res

2018-03-21 18:24:20 -0600 commented answer Boiler with two stages

@Aaron Boranian Thanks for the pointers. Thanks, this helps and makes sense. For the scenario of a constant-flow boil

2018-03-21 18:06:10 -0600 commented answer Outside air reset for a boiler with a primary-secondary loop

I found that an OS:Schedule:FixedInterval was needed in the secondary loop (OA reset SPMs can't be applied to WH objects

2018-03-21 17:38:46 -0600 marked best answer Boiler with two stages

I have a boiler with two stages that has no gas rate modulation besides off and those two stages. What is the proper method to model this? Is the appropriate setting "SequentialLoad" for the Load Distribution Scheme at the "Supply Equipment / Demand Equipment" boundary? I tried that and "Optimal", but got the same water heating energy usage results either way.

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2018-03-21 17:38:29 -0600 commented answer Boiler with two stages

@Aaron Boranian 1. Is a custom written EnergyPlus measure the recommended practice for implementing EnergyPlus stuff tha

2018-03-02 18:43:00 -0600 commented answer Boiler with two stages

How are the maximum, minimum, and optimal Boiler:HotWater part load ratios used when there is only one boiler? Let's say

2018-03-02 18:17:43 -0600 commented answer Outside air reset for a boiler with a primary-secondary loop

I put an OA reset SPM in the primary loop, and left the secondary loop SPM as constant. However, this gives secondary lo

2018-03-02 18:17:43 -0600 received badge  Commentator
2018-02-27 19:00:49 -0600 edited question Outside air reset for a boiler with a primary-secondary loop

Outside air reset for a boiler with a primary-secondary loop What is the recommended method to implement outside air res

2018-02-27 17:20:43 -0600 edited question Outside air reset for a boiler with a primary-secondary loop

Outside air reset for a boiler with a primary-secondary loop What is the recommended method to implement outside air res

2018-02-27 15:53:43 -0600 commented answer Boiler Staging in OpenStudio 1.9.1

Thanks, Matthew. I added a question here.

2018-02-27 15:51:36 -0600 asked a question Outside air reset for a boiler with a primary-secondary loop

Outside air reset for a boiler with a primary-secondary loop What is the recommended method to implement outside air res

2018-02-27 15:23:45 -0600 asked a question Boiler with two stages

Boiler with two stages I have a boiler with two stages that has no gas rate modulation besides off and those two stages.

2018-02-27 15:15:10 -0600 commented answer Boiler Staging in OpenStudio 1.9.1

Has this bug been fixed yet? I have a central boiler water heating model in OpenStudio 2.4.0, where I get the same resul

2018-02-27 15:14:58 -0600 commented answer Boiler Staging in OpenStudio 1.9.1

Has this bug been fixed yet? I have a central boiler water heating model in OpenStudio 2.4.0, where I get the same resul

2018-02-27 15:08:06 -0600 commented answer Boiler Staging in OpenStudio 1.9.1

Has this bug been fixed yet? I have a central boiler water heating model in OpenStudio 2.4.0, where I get the same resul

2018-02-18 10:47:56 -0600 received badge  Teacher (source)
2018-02-16 13:24:29 -0600 marked best answer Setting Cold Water Temperature

I'm trying to set Site:WaterMainsTemperature within OpenStudio, but nothing I do is impacting the results (e.g. water heater energy usage is unchanged). I see in DView that Water Heater Use Side Inlet Temperature is wrong (i.e. the temperature spikes over the year), but don't know why. Please see my OpenStudio 2.4.0 screenshots.

Update: I experimented with my model, but still got water temperatures that don't make sense. Here is what I tried (and which is not shown in the screenshots):

  1. Removed the Set Site Water Mains Temperature measure.
  2. Copied the osm file with a new name so as to ignore the associated file folder in hopes of removing unknown issues.
  3. Removed the bypass pipe.
  4. Changed the pump power to something very low (1 W). Plotted Pump Fluid Heat Gain Rate which is low as desired and expected.
  5. Plotted the Water Use Connections Cold Water Temperature, which shows the proper default temperature of 50 F. However, Water Heater Use Side Inlet Temperature is 135 F which doesn't make sense.

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2018-02-16 13:24:12 -0600 answered a question Setting Cold Water Temperature

Problem solved. The culprit was the adiabatic pipe directly upstream of each water use connection. Once I deleted all of

2018-02-08 12:12:19 -0600 edited question Setting Cold Water Temperature

Setting Cold Water Temperature I'm trying to set Site:WaterMainsTemperature within OpenStudio, but nothing I do is impac

2018-02-08 09:57:04 -0600 edited question Setting Cold Water Temperature

Setting Cold Water Temperature I'm trying to set Site:WaterMainsTemperature within OpenStudio, but nothing I do is impac

2018-02-08 09:55:41 -0600 commented answer Setting Cold Water Temperature

I also tried correlation, and those results are similar to my comment above, except that Water Use Connections Cold Wate

2018-02-08 09:54:52 -0600 commented answer Setting Cold Water Temperature

I checked in.idf and Site:WaterMainsTemperature is as you show. Cold Water Temp CZ9 looks correct. Schedule Type Limits

2018-02-08 09:45:44 -0600 commented answer Setting Cold Water Temperature

I checked in.idf and Site:WaterMainsTemperature is as you show. Cold Water Temp CZ9 looks correct. Schedule Type Limits

2018-02-07 18:42:45 -0600 edited question Setting Cold Water Temperature

Setting Cold Water Temperature I'm trying to set Site:WaterMainsTemperature within OpenStudio, but nothing I do is impac

2018-02-07 18:41:36 -0600 edited question Setting Cold Water Temperature

Setting Cold Water Temperature I'm trying to set Site:WaterMainsTemperature within OpenStudio, but nothing I do is impac

2018-02-07 16:36:52 -0600 edited question Setting Cold Water Temperature

Setting Cold Water Temperature I'm trying to set Site:WaterMainsTemperature within OpenStudio, but nothing I do is impac

2018-02-07 16:06:12 -0600 edited question Setting Cold Water Temperature

Setting Cold Water Temperature I'm trying to set Site:WaterMainsTemperature within OpenStudio, but nothing I do is impac

2018-02-07 16:02:38 -0600 edited question Setting Cold Water Temperature

Setting Cold Water Temperature I'm trying to set Site:WaterMainsTemperature within OpenStudio, but nothing I do is impac

2018-02-07 16:02:38 -0600 received badge  Editor (source)
2018-02-07 15:51:12 -0600 asked a question Setting Cold Water Temperature

Setting Cold Water Temperature I'm trying to set Site:WaterMainsTemperature within OpenStudio, but nothing I do is impac

2017-10-12 18:00:56 -0600 marked best answer Outdoor Air Reset for Domestic Water Heater Supply Water Setpoint

Please help me determine what I'm doing wrong in my EnergyManagementSystem implementation of outdoor air reset for the supply water setpoint of my central domestic water heater. I started with the WaterHeaterDHWPlantLoop example IDF file. I tried using SetpointManager:OutdoorAirReset first, but couldn't get that to work.

Below is an excerpt from my IDF file. The simulation runs without errors, but the EMS code doesn't change the supply water setpoint.

EnergyManagementSystem:Program,
  myTempManager,       !- Name
  SET myTempControl=(-2/3)*OutdoorTemp+64.81,   !- Program Line 1
  IF myTempControl>54.444, !- Program Line 2
  SET myTempControl=54.444,!- A4
  ENDIF,           !- A5
  IF myTempControl<48.8888,!- A6
  SET myTempControl=48.8888,  !- A7
  ENDIF;           !- A8

EnergyManagementSystem:ProgramCallingManager,
  myEMS Custom Controls,   !- Name
  AfterPredictorAfterHVACManagers,  !- EnergyPlus Model Calling Point
  myTempManager;       !- Program Name 1

Output:EnergyManagementSystem,
  Verbose,         !- Actuator Availability Dictionary Reporting
  Verbose,         !- Internal Variable Availability Dictionary Reporting
  Verbose;         !- EMS Runtime Language Debug Output Level

Output:Variable,*,Site Outdoor Air Drybulb Temperature ,Timestep;
Output:Variable,*,Water Heater Use Side Outlet Temperature ,Timestep;

EnergyManagementSystem:Sensor,
  OutdoorTemp,       !- Name
  Environment,       !- Output:Variable or Output:Meter Index Key Name
  Site Outdoor Air Drybulb Temperature ;  !- Output:Variable or Output:Meter Name

SetpointManager:Scheduled,
  Manager,         !- Name
  Temperature,       !- Control Variable
  Hot Water Set Point Temp Schedule,  !- Schedule Name
  Water Heater Use Loop Outlet Node;  !- Setpoint Node or NodeList Name

EnergyManagementSystem:Actuator,
  myTempControl,       !- Name
  WATER HEATER USE LOOP OUTLET NODE,  !- Actuated Component Unique Name
  System Node Setpoint,   !- Actuated Component Type
  Temperature Setpoint;   !- Actuated Component Control Type

RunPeriod,
  ,             !- Name
  1,             !- Begin Month
  1,             !- Begin Day of Month
  12,             !- End Month
  31,             !- End Day of Month
  UseWeatherFile,       !- Day of Week for Start Day
  Yes,           !- Use Weather File Holidays and Special Days
  Yes,           !- Use Weather File Daylight Saving Period
  No,             !- Apply Weekend Holiday Rule
  Yes,           !- Use Weather File Rain Indicators
  Yes;           !- Use Weather File Snow Indicators

SimulationControl,
  NO,             !- Do Zone Sizing Calculation
  NO,             !- Do System Sizing Calculation
  NO,             !- Do Plant Sizing Calculation
  NO,             !- Run Simulation for Sizing Periods
  YES;           !- Run Simulation for Weather File Run Periods

Site:WaterMainsTemperature,
  CORRELATION,       !- Calculation Method
  ,             !- Temperature Schedule Name
  16.8166666666667,     !- Annual Average Outdoor Air Temperature {C}
  6.3;           !- Maximum Difference In Monthly Average Outdoor Air Temperatures {deltaC}

ScheduleTypeLimits,
  Any Number;         !- Name

Schedule:Compact,
  Ambient Temp Schedule,   !- Name
  Any Number,         !- Schedule Type Limits Name
  THROUGH: 12/31,       !- Field 1
  FOR: AllDays,       !- Field 2
  UNTIL: 24:00, 22.0;     !- Field 4

Schedule:Compact,
  Hot Water Set Point Temp Schedule,  !- Name
  Any Number,         !- Schedule Type Limits Name
  THROUGH: 12/31,       !- Field 1
  FOR: AllDays,       !- Field 2
  UNTIL: 24:00, 60;     !- Field 4

WaterHeater:Stratified,
  Water Heater,       !- Name
  Water Heater,       !- End-Use Subcategory
  0.1893,           !- Tank Volume {m3}
  1.4,           !- Tank Height {m}
  VerticalCylinder,     !- Tank Shape
  ,             !- Tank Perimeter {m}
  82.2222,         !- Maximum Temperature Limit {C}
  MasterSlave,       !- Heater Priority Control
  Hot Water Set Point Temp Schedule,  !- Heater 1 Setpoint Temperature Schedule Name
  2.0,           !- Heater 1 Deadband Temperature Difference {deltaC}
  4500,           !- Heater 1 Capacity {W}
  1.0,           !- Heater 1 Height {m}
  Hot Water Set Point Temp Schedule,  !- Heater 2 Setpoint Temperature Schedule Name
  5.0,           !- Heater 2 Deadband ...
(more)
2017-10-04 11:49:23 -0600 received badge  Supporter (source)
2017-09-28 22:12:30 -0600 marked best answer OpenStudio Ruby installation not functioning properly

I followed the Ruby installation instructions here, but when I type irb then require 'openstudio' on the command line, I get this:

irb(main):001:0> require 'openstudio'  
LoadError: 126: The specified module could not be found.   - C:/openstudio-2.2.0/Ruby/openstudio.so  
from C:/openstudio-2.2.0/Ruby/openstudio.rb:55:in `require_relative'  
from C:/openstudio-2.2.0/Ruby/openstudio.rb:55:in `<top (required)>'  
from C:/Ruby200-x64/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'  
from C:/Ruby200-x64/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'  
from C:/Ruby200-x64/lib/ruby/site_ruby/openstudio.rb:1:in `<top (required)>'  
from C:/Ruby200-x64/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'  
from C:/Ruby200-x64/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'  
from (irb):1  
from C:/Ruby200-x64/bin/irb:12:in `<main>'

My OpenStudio and Ruby installations are both 64 bit and I'm running Windows 10 Pro. My Path environment variable includes C:\openstudio-2.2.0\Ruby, C:\Ruby200-x64\lib, and C:\Ruby200-x64\bin.

Note also that the geometry tab in my OpenStudio application does not work for a model based on an IDF file with geometry.