Hello everyone, i am currently testing and modifiying the Energyplus example file. The modelling a desiccant cooling system using Energyplus. After i built the model i am using is 'DesiccantCVRh.idf' and runned the simmulation, i found some problems on the componnet of heat exchanger in the example folder. The original model works well and i made some modification on the secondary air flow of the HeatExchanger. The original model uses the relief air system.The main air stream leaving the desiccant wheel enter the Heat exchanger as the inlet of the Secondary air flow, but i want to use the outside air as the inlet air primary flow to cool down the primary air its temperature. The Secondary air flow of the heat exchanger is outside air, so i put a variable fan on the path of the secondary flow. To do so, i disconnect the relief air and inlet side of the secondary air flow of heat exchanger. Instead, i created an Outside Air Inlet Node4 and Fan and link these two new objects to the inlet side of the secondary air flow of Heat exchanger. After running the simulation, i found the the air temperature of primary air flow at the inlet and outlet of Heat exchanger is equal and the air mass flow rate at the Outside Air Node4 outside air node (inlet node of the secondary air flow) was zero. The modified system i am working on is shown below in the following picture where the main air loop branch include the Outdoor air system, supply fan and cooling coil. I checked the error report and found the relevant warning information about the outside air node4, node, just showing below: It says the connection of the outside air node is not correct. In my model, i just creasted a outdoor node list and put this outside air node on the list and i have nothing operation of this node on other place. So can anyone give me some idea on this issue, many thanks!

Hello everyone, i am currently modelling a desiccant cooling system using Energyplus. After i built the model and runned the simmulation, i found some problems on the componnet of heat exchanger in the system.The main air stream leaving the desiccant wheel enter the Heat exchanger as primary flow to cool down its temperature. The Secondary air flow of the heat exchanger is outside air, so i put a variable fan on the path of the secondary flow. After running the simulation, i found the the air temperature of primary air flow at the inlet and outlet of Heat exchanger is equal and the air mass flow rate at the outside air node (inlet node of the secondary air flow) was zero. The system i am working on is shown in the following picture where the main air loop branch include the Outdoor air system, supply fan and cooling coil. I checked the error report and found the relevant warning information about the outside air node, just showing below: It says the connection of the outside air node is not correct. In my model, i just creasted a outdoor node list and put this outside air node on the list and i have nothing operation of this node on other place. So can anyone give me some idea on this issue, many thanks!

Hello everyone, i am currently modelling a desiccant cooling system using Energyplus. After i built the model and runned the simmulation, i found some problems on the componnet of heat exchanger in the system.The main air stream leaving the desiccant wheel enter the Heat exchanger as primary flow to cool down its temperature. The Secondary air flow of the heat exchanger is outside air, so i put a variable fan on the path of the secondary flow. After running the simulation, i found the the air temperature of primary air flow at the inlet and outlet of Heat exchanger is equal and the air mass flow rate at the outside air node (inlet node of the secondary air flow) was zero. I checked the error report and found the relevant warning information about the outside air node, just showing below: It says the connection of the outside air node is not correct. In my model, i just creasted a outdoor node list and put this outside air node on the list and i have nothing operation of this node on other place. So can anyone give me some idea on this issue, many thanks!

Hello everyone, i am currently modelling a desiccant cooling system using Energyplus. After i built the model and runned the simmulation, i found some problems on the componnet of heat exchanger in the system.The main air stream leaving the desiccant wheel enter the Heat exchanger as primary flow to cool down its temperature. The Secondary air flow of the heat exchanger is outside air, so i put a variable fan on the path of the secondary flow. After running the simulation, i found the the air temperature of primary air flow at the inlet and outlet of Heat exchanger is equal and the air mass flow rate at the outside air node (inlet node of the secondary air flow) was zero. I checked the error report and found the relevant warning information about the outside air node, just showing below: It says the connection of the outside air node is not correct. In my model, i just creasted a outdoor node list and put this outside air node on the list and i have nothing operation of this node on other place. So can anyone give me some idea on this issue, many thanks!