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Control of ZONEHVAC:BASEBOARD:RADIANTCONVECTIVE:WATER flow rate with EMS

asked 2017-02-01 09:10:45 -0500

Esmail gravatar image

updated 2017-02-01 09:23:58 -0500

Dear Sir/Madam,

I am trying to overwrite the existing control of baseboard heater in EnergyPlus with an EMS program. There is no actuator for control of baseboard mass flow and I just defined an actuator on input mass flow node of baseboard and wrote a program to set this value for every time step. However, when i run the simulation, this control does not apply and the baseboard convector still operates with existing control algorithm in the energyPlus. Could you give me some hints on how to fix this problem. Any option beside modifying the EnergyPlus source codes?

Regards, Esmail

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answered 2017-02-02 13:03:53 -0500

Archmage gravatar image

Here are a couple workarounds, but I haven't tried them:

  • If there is just one baseboard on the plant loop you could actuate the pump's flow rate schedule to limit the flow available.

  • It might work to put a LoadProfile:Plant object on the same hot water branch in front of the baseboard's connection and actuate it's mass flow rate (with no load).

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answered 2017-02-03 07:32:23 -0500

Esmail gravatar image

updated 2017-02-03 08:34:36 -0500

Thanks Archmage, I tried both of your suggestions,

  1. The first suggestion works but it is required to keep the thermostat to a high temperature and remove the bypass pipe.

  2. I put a loadprofile:plant after the baseboard with zero load but controlling that object flow rate can not overwrite the base board flow rate.

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Asked: 2017-02-01 09:10:45 -0500

Seen: 135 times

Last updated: Feb 03 '17