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2021-09-30 14:27:23 -0500 | received badge | ● Popular Question (source) |
2021-06-29 21:57:11 -0500 | asked a question | GetCoilWaterInletNode: Could not find Coil. GetCoilWaterInletNode: Could not find Coil. I'm working on the simulation of a ventilated slab and a packaged terminal a |
2020-08-04 12:33:50 -0500 | asked a question | BCVTB and ptolemy 2 BCVTB and ptolemy 2 Before using BCVTB for co-simulation of Matlab and energyplus, must I install Ptolemy 2? Or just ins |
2020-08-04 12:27:10 -0500 | asked a question | BCVTB and Ptolemy2 BCVTB and Ptolemy2 Before using BCVTB for the co-simulation of Energyplus and Matlab, must I install the Ptolemy 2 ? Or |
2018-12-14 13:49:18 -0500 | commented answer | How does the Energyplus calculate the ideal loads? I changed the authority of the link...now everyone can access to the file.(sorry for the inconvenience before),Thanks fo |
2018-12-14 13:46:17 -0500 | commented answer | How does the Energyplus calculate the ideal loads? This is the Link, thanks for any help. (maybe this is not your job or EP's problem) link text |
2018-12-12 12:50:42 -0500 | edited question | Mismatch of Air heat balance and inside heat balance. Mismatch of Air heat balance and inside heat balance. Hello Everyone! This question is derived from one of my previous |
2018-12-11 15:26:41 -0500 | commented answer | How does the Energyplus calculate the ideal loads? This is the Link, thanks for any help. (maybe this is not your job or EP's problem) link text |
2018-12-11 15:26:41 -0500 | received badge | ● Commentator |
2018-12-11 11:05:36 -0500 | commented answer | How does the Energyplus calculate the ideal loads? A mid floor, the material is concrete. just like drawing two smaller zones and putting them together. (of course I match |
2018-12-10 18:57:07 -0500 | marked best answer | How to set opening factors correctly? For modelling cooling effects of natural ventilation in an atrium, I use the airflow network in energyplus to simulate the natural ventilation.
To control the conditions and calculate the change of cooling loads, I use the To control the natural ventilation, I use temperature as However, I found the opening factors still have some values less than 1.0, like 0.5, why? there is my filelink text and resultslink text Thanks |
2018-12-10 18:57:04 -0500 | answered a question | How to set opening factors correctly? This is because I set the Output:variable in the hourly, and energyplus will automatically calculate the average of open |
2018-12-10 15:38:22 -0500 | edited question | Mismatch of Air heat balance and inside heat balance. Mismatch of Air heat balance and inside heat balance. Hello Everyone! This question is derived from one of my previous |
2018-12-10 12:13:04 -0500 | asked a question | Mismatch of Air heat balance and inside heat balance. Mismatch of Air heat balance and inside heat balance. Hello Everyone! This question is derived from one of my previous |
2018-12-10 11:14:47 -0500 | answered a question | Relation of System Air Heat Transfer Rate and Sensible Cooling Rate of Coil The unclear results always a problem for the user of energyplus. The problem you described may have different reasons, |
2018-12-09 19:37:46 -0500 | edited question | How does the Energyplus calculate the ideal loads? How does the Energyplus calculate the ideal loads? Hello, I check the engineering reference, but there is no clear equat |
2018-12-09 19:09:36 -0500 | edited question | How does the Energyplus calculate the ideal loads? How does the Energyplus calculate the ideal loads? Hello, I check the engineering reference, but there is no clear equat |
2018-12-09 17:30:08 -0500 | commented answer | How does the Energyplus calculate the ideal loads? Yes, I think this is a good way to show all the Zone Thermal Load. And after dividing, Zone Air Heat Balance Surface Co |
2018-12-09 15:00:11 -0500 | commented answer | How does the Energyplus calculate the ideal loads? Yes. Basically, the air heat balance system air transfer rate = the cooling load, and above variables are parts of the t |
2018-12-03 21:46:23 -0500 | asked a question | How does the Energyplus calculate the ideal loads? How does the Energyplus calculate the ideal loads? Hello, I check the engineering reference, but there is no clear equat |
2018-12-03 10:29:17 -0500 | received badge | ● Teacher (source) |
2018-12-03 09:42:54 -0500 | answered a question | Question for the Energyplus example file:AirflowNetwork_Multizone_HorizontalOpening OK This is a summary from Jason DeGraw's answer. The regular AFN model is based on pressure and temperature difference |
2018-12-03 09:24:08 -0500 | marked best answer | How to define a pretty high thermal zone? Hello! I'm modelling a large atrium with natural ventilation to test the cooling effects of the natural ventilation. For this atrium, to prevent the smoke spreading in fire, it sets a floor in the middle and connects upper part with lower part by some large horizontal openings. As shown in the picture. For this problem, as the I/O reference mentioned, it cannot use the airflow network, because it cannot calculate the temperature stratification. So, it needs to use a Roomair:node: airflowNetwork. However,there is a confusion. How can I define this space? If I define this atrium as a single zone and use Roomair:node to simulate temperature stratification, it will ignore the effects of floor slab in middle. But If I define it as two zones, as mentioned in the reference, it cannot calculate buoyant effects between these two zones correctly. Any suggestions are very helpful. |
2018-12-02 20:50:03 -0500 | marked best answer | Question for the Energyplus example file:AirflowNetwork_Multizone_HorizontalOpening Hello Everyone! I am confused by the description in the I/O reference and the example file of the horizontal openings. On the Page 1041 of the I/O reference, it is said:
However, in the example file, AirflowNetwork_Multizone_HorizontalOpening, it creates a large space and divide it into two zones with a large horizontal opening in the middle. As it mentioned, if the AFN cannot calculate the temperature stratification simply, how can this example file get correct result? |
2018-12-02 20:50:02 -0500 | commented answer | Question for the Energyplus example file:AirflowNetwork_Multizone_HorizontalOpening By the way, in the part of RoomAirflow network model, if it needs to connect nodes in a single zone, linkage such as cra |
2018-12-02 20:42:05 -0500 | commented answer | Question for the Energyplus example file:AirflowNetwork_Multizone_HorizontalOpening This explanation is more reasonable. I checked the RoomAir Model parts in the I/O reference, it said that the airflow in |
2018-12-02 20:19:29 -0500 | commented answer | Question for the Energyplus example file:AirflowNetwork_Multizone_HorizontalOpening I thought of this situation before. But I think the description is ambiguous. If two vertical spaces can be connected b |
2018-12-02 16:09:53 -0500 | edited question | Question for the Energyplus example file:AirflowNetwork_Multizone_HorizontalOpening Question for the Energyplus example file:AirflowNetwork_Multizone_HorizontalOpening Hello Everyone! I am confused by the |
2018-12-02 16:09:19 -0500 | asked a question | Question for the Energyplus example file:AirflowNetwork_Multizone_HorizontalOpening Question for the Energyplus example file:AirflowNetwork_Multizone_HorizontalOpening Hello Everyone! I am confused by the |
2018-12-02 12:33:58 -0500 | answered a question | How to define a good strategy for natural ventilation with Airflownetwork(AFN) in Energyplus? Your description is too ambiguous. You should show more details...This is a simple answer, and may be not correct. As yo |
2018-12-01 16:31:31 -0500 | edited question | How to define a pretty high thermal zone? Questions for Airflow Network and Roomair:node: airflowNetwork Hello! I'm modelling a large atrium with natural ventilat |
2018-12-01 16:31:23 -0500 | edited question | How to define a pretty high thermal zone? Questions for Airflow Network and Roomair:node: airflowNetwork Hello! I'm modelling a large atrium with natural ventilat |
2018-11-28 11:09:47 -0500 | asked a question | How to define a pretty high thermal zone? Questions for Airflow Network and Roomair:node: airflowNetwork Hello! I'm modelling a large atrium with natural ventilat |
2018-11-28 10:43:09 -0500 | answered a question | How to control inlet air temperature and humidity in Natural ventilation. For the first question: This problem has been solved by adding a new senor(for example Vent_schedule) in the venting sch |
2018-11-28 10:37:39 -0500 | marked best answer | How to control inlet air temperature and humidity in Natural ventilation. I'm looking forward modelling the cooling effects caused by natural ventilation. To ensure the indoor thermal comfort, I wish to use natural ventilation only when outside temperature is in 12-21 degree and the outside humidity should be less than 80% on the night(0:00-7:00). So I have two questions
1. in airflow network, it cannot set outside temperature range and humidity, and So I add a (EMS) to control this. However, how can I control the time? The code is following. Thanks for any assistance. !- =========== ALL OBJECTS IN CLASS: ENERGYMANAGEMENTSYSTEM:SENSOR =========== EnergyManagementSystem:Sensor, ZoneT, !- Name Thermal Zone: The atrium 1, !- Output:Variable or Output:Meter Index Key Name Site Outdoor Air Drybulb Temperature; !- Output:Variable or Output:Meter Name !- =========== ALL OBJECTS IN CLASS: ENERGYMANAGEMENTSYSTEM:ACTUATOR =========== EnergyManagementSystem:Actuator, MyOpenFactor1, !- Name Bottom Vent, !- Actuated Component Unique Name AirFlow Network Window/Door Opening, !- Actuated Component Type Venting Opening Factor; !- Actuated Component Control Type EnergyManagementSystem:Actuator, MyOpenFactor2, !- Name Top Vent, !- Actuated Component Unique Name AirFlow Network Window/Door Opening, !- Actuated Component Type Venting Opening Factor; !- Actuated Component Control Type !- =========== ALL OBJECTS IN CLASS: ENERGYMANAGEMENTSYSTEM:PROGRAMCALLINGMANAGER =========== EnergyManagementSystem:ProgramCallingManager, TControlled Open Factor, !- Name BeginTimestepBeforePredictor, !- EnergyPlus Model Calling Point T_OpeningController; !- Program Name 1 !- =========== ALL OBJECTS IN CLASS: ENERGYMANAGEMENTSYSTEM:PROGRAM =========== EnergyManagementSystem:Program, T_OpeningController, !- Name , !- Program Line 1 IF ZoneT < 12, !- Program Line 2 SET MyOpenFactor1 = 0.0, !- A4 SET MyOpenFactor2 = 0.0, !- A5 ELSEIF ZoneT > 21, !- A6 SET MyOpenFactor1 = 0.0, !- A7 SET MyOpenFactor2 = 0.0, !- A8 ElSE, !- A9 SET MyOpenFactor1 = 1.0, !- A10 SET MyOpenFactor2 = 1.0, !- A11 ENDIF; !- A12 |
2018-11-17 21:47:29 -0500 | asked a question | Natural Ventilation and paradoxical Cooling load Natural Ventilation and paradoxical Cooling load Hello Everyone! I'm modelling the impact of natural ventilation on the |
2018-11-08 15:31:24 -0500 | marked best answer | Discussion on EMS use in Energyplus on Opening factor Control When I'm checking the simulation example in the energyplus, I found a EMS problem relating to the opening factor Control.
In the The EMS control code is below: Then, when I checking the results, I found that the Venting availability Schedule is ignored by applying the EMS, which means users cannot control the opening factors based on time! Did anyone discover this irrational problem? Is this a Bug or error? How can user control the openings with EMS and time? |