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Hello,

I am wondering if there are two different time steps (one for Plant i.e. HVAC and the other for the Zone) in EnergyPlus? if not is there a response time for the Plant to start Circulating conditioned air? if there is a response time How can I control it?

Any help will be greatly appreciated.

Sincerely,

Nadish Anand

Hello,

I am wondering if there are two different time steps (one for Plant i.e. HVAC and the other for the Zone) in EnergyPlus? if not is there a response time for the Plant to start Circulating conditioned air? if there is a response time How can I control it?

Any help will be greatly appreciated.

Sincerely,

Nadish Anand

Hello,

I am wondering if there are two different time steps (one for Plant i.e. HVAC and the other for the Zone) in EnergyPlus? if not is there a response time for the Plant to start Circulating conditioned air? if there is a response time How can I control it?

Any help will be greatly appreciated.

Sincerely,

Nadish Anand

Update:

Hello Amir and Eric, I am referring to the Following Data Plot:

Zone Air Temperature-1 min. Timestep

This is the plot of the Zone Air Temperature Data I have obtained from my EnergyPlus Simulation. I have an EMS Code that Controls the HVAC Operation with a Offset Temperature from the Heating and Cooling Setpoints. The offset Temperature here is 0.6 deg.C and the Heating Setpoint is 21.1 deg.C. Now as you can see from the plot the HVAC system is not starting operation as soon as (21.1-0.6) = 20.5 deg.C is hit by the Zone Air temperature. It takes a while (1-3 mins.) to start operation. I am wondering why this behavior is experienced and hence my earlier question.

Thank you once again.

Nadish

Hello,

I am wondering if there are two different time steps (one for Plant i.e. HVAC and the other for the Zone) in EnergyPlus? if not is there a response time for the Plant to start Circulating conditioned air? if there is a response time How can I control it?

Any help will be greatly appreciated.

Sincerely,

Nadish Anand

Update:

Hello Amir and Eric, I am referring to the Following Data Plot:

Zone Air Temperature-1 min. Timestep

Zone Air Temperature Detailed

This is the plot of the Zone Air Temperature Data I have obtained from my EnergyPlus Simulation. I have an EMS Code that Controls the HVAC Operation with a Offset Temperature from the Heating and Cooling Setpoints. The offset Temperature here is 0.6 deg.C and the Heating Setpoint is 21.1 deg.C. Now as you can see from the plot the HVAC system is not starting operation as soon as (21.1-0.6) = 20.5 deg.C is hit by the Zone Air temperature. It takes a while (1-3 mins.) to start operation. I am wondering why this behavior is experienced and hence my earlier question.

Thank you once again.

Nadish

Hello,

I am wondering if there are two different time steps (one for Plant i.e. HVAC and the other for the Zone) in EnergyPlus? if not is there a response time for the Plant to start Circulating conditioned air? if there is a response time How can I control it?

Any help will be greatly appreciated.

Sincerely,

Nadish Anand

Update:

Hello Amir and Eric, I am referring to the Following Data Plot:

Zone Air Temperature-1 min. Timestep

Zone Air Temperature Detailed

This is the plot of the Zone Air Temperature Data I have obtained from my EnergyPlus Simulation. I have an EMS Code that Controls the HVAC Operation with a Offset Temperature from the Heating and Cooling Setpoints. The offset Temperature here is 0.6 deg.C and the Heating Setpoint is 21.1 deg.C. Now as you can see from the plot the HVAC system is not starting operation as soon as (21.1-0.6) = 20.5 deg.C is hit by the Zone Air temperature. It takes a while (1-3 mins.) to start operation. I am wondering why this behavior is experienced and hence my earlier question.

Thank you once again.

Nadish

Hello,

I am wondering if there are two different time steps (one for Plant i.e. HVAC and the other for the Zone) in EnergyPlus? if not is there a response time for the Plant to start Circulating conditioned air? if there is a response time How can I control it?

Any help will be greatly appreciated.

Sincerely,

Nadish Anand

Update:

Hello Amir and Eric, I am referring to the Following Data Plot:

Zone Air Temperature-1 min. Timestep

Zone Air Temperature Detailed

This is the plot of the Zone Air Temperature Data I have obtained from my EnergyPlus Simulation. I have an EMS Code that Controls the HVAC Operation with a Offset Temperature from the Heating and Cooling Setpoints. The offset Temperature here is 0.6 deg.C and the Heating Setpoint is 21.1 deg.C. Now as you can see from the plot the HVAC system is not starting operation as soon as (21.1-0.6) = 20.5 deg.C is hit by the Zone Air temperature. It takes a while (1-3 mins.) to start operation. I am wondering why this behavior is experienced and hence my earlier question.

Thank you once again.

Nadish