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Knowledgebase : HVAC

Question: How do you implement dehumidification controls in EnergyPlus? Using the "Dehumidification Control" options in HVACTemplate:*, I noticed that sometimes a SetpointManager:SingleZone:Humidity:Maximum object is present in the expidf, but for some s...
Question: In the 5.0 release notes, I read "Dual layer controls for radiant systems removed." In the 5.0 I/O Reference I also saw there are three sentences added to the first paragraph of the ZoneHVAC:LowTemperatureRadiant:VariableFlow. These sentences ...
It depends on which specific EnergyPlus object you are trying to use. The Dehumidifier:Desiccant:NoFans object has default performance curves within the model itself that you can use. Set field A12, "Performance Model," to DEFAULT. Alternatively, y...
Apply the availability schedule to the HVAC System (i.e., Furnace or DXSystem), the coils and the fan objects. If HVACTemplate objects are used, apply the availability schedule to the HVACTemplate object. You will get different results depending on the se...
What types of HVAC system can be simulated using EnergyPlus? EnergyPlus HVAC systems input is flexible, so many different types of systems can be built using the basic available components. There are also compound components which represent common equi...
In short: Fan:ConstantVolume is a constant volume, continuous operation fan which can be turned on and off via a schedule. Fan:OnOff is similar to the one above, but it cycles itself on and off as required by its thermostat ... all during the scheduled ...
> Can I determine the ventilation load for PAU in PAU + FCUs system? If can, > how to split the total cooling load into room load and ventilation load for > PAU sizing in energyplus? > In the HTML report, "Nominal total capacity [W]" (EquipmentSummary...
Troubleshooting Thermostat Setpoint Not Met Hours (not exhaustive, but should get you started): Run annual simulation Request bin report for hours not met, or plot hourly values Is this a morning warmup/cooldown problem or not? Run design days (aut...