First time here? Check out the Help page!
2019-11-20 08:50:32 -0500 | received badge | ● Popular Question (source) |
2019-01-07 16:01:55 -0500 | commented answer | Control LowTemperatureRadiant using indoor and outdoor temperature with EMS? TABS stands for Thermally Activated Building Systems. It's like conrete core activation, so heating and cooling with the |
2019-01-07 09:14:22 -0500 | received badge | ● Editor (source) |
2019-01-07 09:14:22 -0500 | edited question | EMS:ProgramCallingManager with 4 plant loops without overwriting? EMS:ProgramCallingManager with 4 plant loops without overwriting? Dear all I'm simulating TABS in EnergyPlus and I rece |
2019-01-07 09:14:03 -0500 | edited question | EMS:ProgramCallingManager with 4 plant loops without overwriting? EMS:ProgramCallingManager with 4 plant loops without overwriting? Dear all I'm simulating TABS in EnergyPlus and I rece |
2019-01-07 06:50:17 -0500 | asked a question | EMS:ProgramCallingManager with 4 plant loops without overwriting? EMS:ProgramCallingManager with 4 plant loops without overwriting? Dear all I'm simulating TABS in EnergyPlus and I rece |
2019-01-03 09:06:59 -0500 | commented answer | Control LowTemperatureRadiant using indoor and outdoor temperature with EMS? Thank you very much! This works. I realized I have another problem now though. With the code above 'IF (OutdoorT<5) & |
2019-01-03 05:09:09 -0500 | marked best answer | Control LowTemperatureRadiant using indoor and outdoor temperature with EMS? Dear all I'm using ZoneHVAC:LowTemperatureRadiant:ConstantFlow to simulate TABS (cooling and heating) in EnergyPlus. I want to control my TABS using the outdoor dry bulb and indoor operative temperature. Since ZoneHVAC:LowTemperatureRadiant:ConstantFlow only provides one control parameter, I thought of using the Energy Management System (EMS) inside EnergyPlus. I have 15 different zones divided into two categories: Day zones and Night zones. All the Day zones are connected to one boiler and one chiller. The Night zones are connected to one boiler and one chiller as well (different from the Day Zones). So in total there are 2 boilers and 2 chillers. In EMS:Sensor I've got 15 different object for zone operative temperatures and one object for the Outdoor Dry Bulb Temperature using 'AIR LOOP AHU OUTDOOR AIR INLET' as 'Output: Variable or Output: Meter Index Key Name' and 'System Node Temperature' as 'Output: Variable or Output:Meter Name'. For the EMS:Actuator I've got 4 objects, these are the different schedules of my boilers (2x) and chillers (2x). The schedules are the same as in class 'PlantEquipmentOperationSchemes'. As 'Actuated Component Unique Name' I put the name of the schedule used in 'PlantEquipmentOperationSchemes'. As 'Actuated Component Type' I wrote 'Schedule: Compact' and as 'Actuated Component Control Type' I wrote 'Schedule Value'. Then here's an example of the EMS: Program I wrote: "Name: BoilerDayControl IF (OutdoorT<5) && (Tapp1Day<20) SET BoilerTABSday=1 ELSE SET BoilerTABSday=0 ENDIF" OutdoorT and Tapp1Day are objects from EMS:Sensor and BoilerTABSday is an object of the EMS:Actuator. In the EMS:ProgramCallingManager, I used 'InsideHVACSystemIterationLoop' as 'EnergyPlus Model Calling Point'. Now when I look at my output, I see that the water flow rate is still flowing through my TABS even if the Outdoor Dry Bulb is above 5°C or Tapp1Day is above 20°C... So it seems that my program is not working at all. What do I do wrong? Or what can I do better? I want my TABS to cool and heat, taking 2 parameters (inside and outside temperature) into account. Thanks in advance! |
2018-12-26 11:57:57 -0500 | asked a question | Control LowTemperatureRadiant using indoor and outdoor temperature with EMS? Control LowTemperatureRadiant using indoor and outdoor temperature with EMS? Dear all I'm using ZoneHVAC:LowTemperature |
2018-12-19 05:42:52 -0500 | marked best answer | Problem Zone HVAC Heating Rate when Tubing Length is doubled Dear all I'm modelling TABS in EnergyPlus using 'ZoneHVAC:LowTemperatureRadiant:ConstantFlow'. The problem is when I double the the hydronic tubing length, the output 'Zone HVAC Heating Rate' of a certain zone stays the same. For example, I have a zone of 26,1m² with a hydronic tubing length of 313m. The Zone HVAC Heating Rate peak is 1585 W. When I double the hydronic tubing length to 626m, the Zone HVAC Heating Rate graph stays exactly the same while I expect this to rise. The number of circuits is 'CalculateFromCircuitLength' and the circuit length is 100m. The rated flow rate is 0,0001148 m³/s and the temperature of the water in the tubes is 27,5°C. Does anyone know what is going wrong here? Thanks in advance! |
2018-12-18 04:03:39 -0500 | asked a question | Problem Zone HVAC Heating Rate when Tubing Length is doubled Problem Zone HVAC Heating Rate when Tubing Length is doubled Dear all I'm modelling TABS in EnergyPlus using 'ZoneHVAC: |
2018-11-21 07:53:10 -0500 | commented question | Problem with HeatExchanger:AirToAir:SensibleAndLatent Also is the effectiveness and efficiency of the heat exchanger the same or is it something different in EnergyPlus? |
2018-11-20 08:21:13 -0500 | asked a question | Problem with HeatExchanger:AirToAir:SensibleAndLatent Problem with HeatExchanger:AirToAir:SensibleAndLatent Hi I’m modelling a centralized AHU with heating coil, cooling coi |
2018-11-07 05:35:14 -0500 | asked a question | Temperature control type of LowTemperatureRadiant Temperature control type of LowTemperatureRadiant Hi I'm using EnergyPlus to model a TABS system using ZoneHVAC:LowTemp |
2018-10-30 07:50:25 -0500 | asked a question | Control of AHU with one heating coil for multiple zones? Control of AHU with one heating coil for multiple zones? Hi I'm simulating in EnergyPlus and I'm using ventilation as a |
2018-10-30 07:08:31 -0500 | marked best answer | How are the hydronic tubes embedded in low temperature radiant system? (EnergyPlus) Hi I'm modelling TABS (Thermally Activated Building Systems) via ZoneHVAC:LowTemperatureRadiant:ConstantFlow in EnergyPlus (EP). Could anyone tell me how the hydronic tubes/pipes are embedded in the system? I can't seem to find this in the EP documentation. Does EP consider the entire floor (finishing, insulation, concrete slab,...) as a whole and does EP put its tubes in the middle? Or does EP put the tubes in the concrete slab? Or something else? Thanks in advance! |
2018-10-30 07:08:31 -0500 | received badge | ● Scholar (source) |
2018-07-19 09:02:32 -0500 | received badge | ● Supporter (source) |
2018-07-17 13:34:46 -0500 | received badge | ● Student (source) |
2018-07-17 11:47:54 -0500 | asked a question | How are the hydronic tubes embedded in low temperature radiant system? (EnergyPlus) How are the hydronic tubes embedded in low temperature radiant system? (EnergyPlus) Hi I'm modelling TABS (Thermally Ac |
2018-07-17 11:47:54 -0500 | asked a question | EnergyPlus - Air Loop Setpoint Manager EnergyPlus - Air Loop Setpoint Manager Hi I'm making a model in EnergyPlus (EP) but it seems that the ventilation is no |