AIRFLOW NETWORK MODELING IN ENERGYPLUS
The airflow network model in EnergyPlus providesthe ability to simulate multizone wind-drivenairflows. The model is also able to simulate theimpacts of forced air distribution systems, includingsupply and return air leaks. The air distributionsystem portion of the model is currently applicablefor constant-air-volume systems. Futureenhancements will include adding hybrid ventilationcontrol and possible extension to include variable-air-volume distribution systems.This paper describes the input objects, calculationprocedures, model validation, and example results.The model inputs consist of five main objects:simulation control, multizone data, node data,component data, and linkage data. The modelcalculates pressure at each node and airflow througheach component based on the pressure versus airflowrelationship defined for each component. Using theseairflow rates and HVAC equipment models,temperature and humidity ratio at each air node arethen calculated. All cooling/heating loads resultingfrom the multizone airflow and air distributionsystem model are then summed and passed toEnergyPlus zone air heat and moisture balancemodel which calculates zone air temperature andhumidity ratio. The loads from multizone air flowsare used to predict required system loads, while theloads due to the air distribution system are used torecalculate zone air temperatures and humidity ratios.EnergyPlus airflow network model was validatedagainst measured data from both the Oak RidgeNational Laboratory (ORNL) and the Florida SolarEnergy Center (FSEC). Whole building energysimulations were performed using EnergyPlus inaddition to validating specific portions of its airflownetwork model. There was good agreement betweenthe simulation results and the measured data.
Air distribution system Airflow and pressure Interactions among envelope HVAC system and outdoors
Lixing Gu
Florida Solar Energy Center 1679 Clearlake Road, Cocoa, FL 32922, USA
国际会议
北京
英文
2007-09-03（万方平台首次上网日期，不代表论文的发表时间）