cirulo's profile - activity

U gives values for certain enclosures knowing thick. If thick changes, U will change. Conductivity gives values for mate

I knew ZoneVentilation:WindandStackOpenArea reading that post. Really, it hasnt meaning to think in heat transfer becaus

I knew ZoneVentilation:WindandStackOpenArea reading that post. Really, it hasnt mean to think in heat transfer because o

Best way to simulate an open exterior door/windows I have two cases; one is a retail where they dont have door (they hav

Strange, link is working for me. New link

IDF file, and thermal and electricity consumption (table screenshots). I changed somethings respect to my above post. I

HVAC Electric and thermal consumption very diferent I'm trying to simulate an existing building, with real equipment, an

Electric and thermal consumption very diferent I'm trying to simulate an existing building, with real equipment, and I'm

Electric and thermal consumption very diferent I'm trying to simulate an existing building, with real equipment, and I'm

I am trying to use Openstudio 2.2 and/or Sketchup 2017 in Windows 10, and I get access problems when tool tries to access to Temp folder.

I discovered (I think) it happens because my name has special characters (ñ, á, ó...). I created other user without strange characters, and I can open and use Openstudio.

Do anyone have an idea about what could I do to use Openstudio in my user count?

Openstudio - Access denied I am trying to use Openstudio 2.2 and/or Sketchup 2017 in Windows 10, and I get access proble

Fantastic. In this case, I think both models should leave from exterior measured temperature and humidity in epw format, this will improve the model.

I am studding if real interior and exterior temperature and humidity can improve E+ models. I think it is very easy and cheap to extend a sensors net in buildings, based in microcontrollers (I am using Arduino, which is really easy and cheap), save temperature and humidity in epw format (at less exterior conditions), and use it in my model, but I am not sure in which way. It could be I fix zones temperature and humidity where I am using the sensors.

My intuition say me all I measure is good for the model.

Fantastic answer. I always have had problems to find information about this topic. Where could I get more information to go deep about specific system simulatuions? Otherwise, system simulation.

I need to process this information, there are a lot of new things for me. Thank you.

These numbers come from autosizing results, I read them in EIO file, as Calc Des Air Flow Rate {m3/s} and Calc Des Load {W}. Really, I only have two inputs; cooling and heating capacity for an heat pump, and I leave Supply Air as autosize, but I get error because I think E+ crosses Sizing Calculation with Simulation for Sizing Periods o something like that, I am not sure in this point.

I get this error Min Rated Vol Flow Per Watt=[4.027E-005], Rated Vol Flow Per Watt=[1.031E-004], Max Rated Vol Flow Per Watt=[6.041E-005]. See Input Output Reference Manual for valid range..

What I'd like to do is to simulate a real system, in a real building. I know how to use autosize; reading EIO file, I know what capacity and equiment I need. However, if I'm analisying, a real heat pump in an existing building, I dont know how to simulate this system in my model.

Could you modify the model to incorporate an 10 kW heat pump, for example, to know how the bulding is responding?

At first, I run model with autosize for:

• Supply Air Maximum Flow Rate {m3/s} and Baseboard Heating Capacity {W} in HVACTemplate:Zone:Unitary.
• Cooling/Heating/No Load Supply Air Flow Rate {m3/s}, Cooling Coil Gross Rated Total Capacity {W}, Cooling Coil Gross Rated Sensible Heat Ratio, Supplemental Heating Coil Capacity {W}, and Maximum/Minimun Outdoor Air Flow Rate {m3/s}, in HVACTemplate:System:UnitaryHeatPump:AirToAir.

I get 12,2 kW, 2.57 m^3/h for heating, and 25,9 kW, 0.34 m^3/h for cooilng, in EIO file. If I change autosize fields for this values, I get error.

I know how to simulate an autosizing simulation. For example, I leave link with Heat Pump' IDF, I get via autosize 12,2 kW, 2.57 m^3/h for heating, and 25,9 kW, 0.34 m^3/h for cooiling.

If I again simulate with 12000 W for heating, and 25000 W for cooling, I get this error:

* Severe * Coil:Cooling:DX:SingleSpeed "PTHP COOLING COIL" -- coil bypass factor calculation did not converge after max iterations. * ~~~ * The RatedSHR of [1.000], entered by the user or autosized (see .eio file), * ~~~ * may be causing this. The line defined by the coil rated inlet air conditions * ~~~ * (26.7C drybulb and 19.4C wetbulb) and the RatedSHR (i.e., slope of the line) must intersect * ~~~ * the saturation curve of the psychrometric chart. If the RatedSHR is too low, then this * ~~~ * intersection may not occur and the coil bypass factor calculation will not converge. * ~~~ * If autosizing the SHR, recheck the design supply air humidity ratio and design supply air * ~~~ * temperature values in the Sizing:System and Sizing:Zone objects. In general, the temperatures * ~~~ * and humidity ratios specified in these two objects should be the same for each system * ~~~ ** and the zones that it serves.

I do not undertand why I get error if I use results from E+. I get similar mistake when I simulate real system in a real building.

I attach file

Model 2