Problem with HeatExchanger:AirToAir:SensibleAndLatent

asked 2018-11-20 08:21:13 -0600

kenny.c
177 ●5

updated 2018-11-20 08:35:55 -0600

I’m modelling a centralized AHU with heating coil, cooling coil and a heat exchanger in EnergyPlus. My total ventilation rate is 0,3867 m³/s (CAV) for 15 zones. I think there’s something wrong with my heat exchanger (HeatExchanger:AirToAir:SensibleAndLatent) but I don’t know what exactly. When I turn off my heating coil, cooling coil and heat exchanger, the air temperature of the ventilation into the room is slightly above the outdoor drybulb (which is normal). But when I turn on the heat exchanger (while the heating and cooling coils remain off), the air temperature of the ventilation is 20-24°C with an average outdoor drybulb of 5°C. The Sensible Effectiveness of my heat exchanger is 0,85 so normally it should not be possible to heat the air supply temperature from an outside temperature of 5°C to an inside air temperature of 24°C. Am I overlooking something? Thank in advance!

edit retag flag offensive close merge delete

Comments

Also is the effectiveness and efficiency of the heat exchanger the same or is it something different in EnergyPlus?

kenny.c ( 2018-11-21 07:53:10 -0600 )edit

add a comment

Output:Variable,*,System Node Temperature,hourly; !- HVAC Average [C] Output:Variable,*,System Node Mass Flow Rate,hourly; !- HVAC Average [kg/s] Output:Variable,*,System Node Humidity Ratio,hourly; !- HVAC Average [kgWater/kgDryAir]

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Problem with HeatExchanger:AirToAir:SensibleAndLatent

Comments

1 Answer

Your Answer

Training Workshops

Careers

Question Tools

Stats

Problem with HeatExchanger:AirToAir:SensibleAndLatent edit

Comments

1 Answer

Your Answer

Training Workshops

Careers

Question Tools

Stats

Problem with HeatExchanger:AirToAir:SensibleAndLatent