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Hi, I am a beginner with e+ and OS. I would like to ask you for some advice on a project I am completing with OS. I am trying to simulate an HVAC system served only by two pipe fan coils. I modelled the system as suggested in this discussion (Here) and it seems to work during the summer, but I have some problems during the heating period.

First of all, I attach the layout of the system and would like to ask if it is correct not to define an air loop. I have only assigned FourPipeFanCoil units for each thermal zone and then connected them to the chilled and hot water loop, so without defining a dedicated air loop for each unit (fan coils do not have a dedicated air loop).

Chilled water loop here

Hot water loop here

Then I would like to ask why, if I graph the inlet/outlet temperature of the boiler, I have these results.

Boiler outlet temperature

Boiler inlet temperature

It seems to me that the temperature does not drop as I would expect, and I do not know why in summer it does not drop accordingly with the shutdown of the system (I forced the plant off with availability scheduled off manager). In general, the model simulates less gas consumption than the real one and I think that this could be the problem.

Hi, I am a beginner with e+ and OS. I would like to ask you for some advice on a project I am completing with OS. I am trying to simulate an HVAC system served only by two pipe fan coils. I modelled the system as suggested in this discussion (Here) and it seems to work during the summer, but I have some problems during the heating period.

First of all, I attach the layout of the system and would like to ask if it is correct not to define an air loop. I have only assigned FourPipeFanCoil units for each thermal zone and then connected them to the chilled and hot water loop, so without defining a dedicated air loop for each unit (fan coils do not have a dedicated air loop).

Chilled water loop here

Hot water loop here

Then I would like to ask why, if I graph the inlet/outlet temperature of the boiler, I have these results.

Boiler outlet temperature

Boiler inlet temperature

It seems to me that the temperature does not drop as I would expect, and I do not know why in summer it does not drop accordingly with the shutdown of the system (I forced the plant off with availability scheduled off manager). In general, the model simulates less gas consumption than the real one and I think that this could be the problem.

Hi, I am a beginner with e+ and OS. I would like to ask you for some advice on a project I am completing with OS. I am trying to simulate an HVAC system served only by two pipe fan coils. I modelled the system as suggested in this discussion (Here) and it seems to work during the summer, but I have some problems during the heating period.

First of all, I attach the layout of the system and would like to ask if it is correct not to define an air loop. I have only assigned FourPipeFanCoil units for each thermal zone and then connected them to the chilled and hot water loop, so without defining a dedicated air loop for each unit (fan coils do not have a dedicated air loop).

Chilled water loop here

Hot water loop here

Then I would like to ask why, if I graph the inlet/outlet temperature of the boiler, I have these results.

Boiler outlet temperature

Boiler inlet temperature

It seems to me that the temperature does not drop as I would expect, and I do not know why in summer it does not drop accordingly with the shutdown of the system (I forced the plant off with availability scheduled off manager). In general, the model simulates less gas consumption than the real one and I think that this could be the problem.