João Rodrigues's profile - activity

Hi Urado, I forgot to tell, it was a problem with the thermostat, we need to change the thermostat direct on the radiant systems, because they are not affected by the zone thermostat.

Yes I am using OpenStudio. Thank you for the explanation Eric.

Hi,

I have a model with 2 low temperature radiant systems, one on the floor and the other on the ceiling, their specific flow is different. So I can’t create just one system and associate it to the radiant surface type as CeilingsAndFloors.

I have created 2 internal source constructions, one for the floor and other for the ceiling, so I could have two systems.

However, when I run the simulation it fails, by the result of a severe error that says:

* Severe * Surface SURFACE 1 is referenced by more than one radiant system--this is not allowed

* Fatal * GetLowTempRadiantSystem: Errors found in input. Preceding conditions cause termination.

How can I define, for example, that surface 1 has the system of the floor heating, and surface 2 has the system of the ceiling heating. Thanks,

Thank you Julien by your answer, it sure helped me. HVAC is not my area of work or expertise, so your basics introduction were very helpful. Once again thank you.

I have an air conditioning system using direct expansion of the type Wall Mounted (Daikin) that I would like to simulate in OpenStudio.

However, after exploring the existing area systems on OpenStudio as PTAC and PTHP I found that there aren’t devices which operation, for heating and cooling, is by direct expansion.

Is there any component that allows me to meet these requirements? (Basically acting as a reversible heat pump)

Or I have to make an assembly that resembles to my equipment? Thank you,

Can some one explain me if the properties that we insert on the fans, like the flow, are only to affect the output energy consumption? Or do they affect the flow on our air loop?

Because I wanted to control both the flow and the temperature of the air on my loop, but I am not being able to have 2 setpoints to control the Flow and the Temperature.

So, if I specifythe flow on the Fan will it affect my cooling and heating loads?

Thank you by your answer Julien

Hi Julien, the answer I refered was the one you used at your answer, by Aaron Boranian.

Hi Wilson, I also have a similar problem, on my case is with the radiant floors systems. So your question will help me as well

I have a system with a 300 liters of water consumption per day, and I want to heat 80 L/day of that water. But I want to use a percent of water of my well. Can I model that? And were can I insert a pump to pull that water?

I would like to model a rain water collection system on OpenStudio. How can I do it? Is that implemented yet? An answer to a similar question on 2014 sayed it wasn't possible yet...

I saw other related question on the forum however they applied to the EnergyPlus and not to the OpenStudio.

Does anyone knows something about this?

Yes. I have the following output variables on: Zone Air System Sensible Cooling Energy; Zone Air System Sensible Heating Energy; Zone Air Temperature; Zone Electric Equipment Electric Energy / Power; Zone Outdoor Air Drybulb Temperature; Zone Thermostat Air Temperature; Zone Thermostat Cooling Setpoint Temperature; Zone Thermostat Heating Setpoint Temperature; Zone Total Internal Total Heating Energy; But, for my case Zone Air Temperature should be enought to give me those values right?

I saw your advice Urado, and it worked... However, when I run the simulation (after solving some errors) the results are blank, is like if my system is offline...

As you can see, theres no Heating or Cooling loads, what am I doing wrong?

I have my system represented as the following pictures

Thanks for the answer! But, how can I link this water heater, as a zone object, to my radiante floors? Do I need to create a HP for each thermal zone?

I need to use a centralized heating pump air to water on my project to heat and cool a radiant floor. However, I only find HP water to water on the HVAC systems. I have HP air to water but only as a zone object.

Is there any way to have a heating pump air to water system?

Hi there,

I am trying to model a glass window using the software WINDOW 7.4, to obtain values to use in OpenStudio.

The problem is that i have 4 layers of glass, 2 coatings and 2 layes of noise attenuator.

How can i create a coating layer on WINDOW 7.4?

Cheers :) João

Thanks for the reply. I solved the problem by using the glass maker software that gave me the values i needed for openstudio. But working in the optics proprierties would do nice as well.