Durr's profile - activity

@rraustad: I was wondering, if the low temperature curves are not straight in left hand side figure, then which equation to use for converting boudary curve temperature to CAPFT (i.e. low tempearture curves or high temperature curves). In the above left hand side figure it was easy as the low temperature curves were straight.

Thanks, I have it already. :)

Thanks, I will have a look.

@rraustad: Thanks for your answer, but in right hand side figure there is no distinct low and high temperature sides. How you would differentiate between these regions? P.S: The curve in left hand side figure is for another system not the one on right hand side.

I have developed a performance curve for a VRF system (Left-hand side figure). My questions are;

1. In order to plot boundary curve (Cubic) I used Low temperature region regression equation to calculate CapFT from ODB and then plotted it as shown in the Left-hand side figure, this clearly gives a better fit. I am wondering, is this the right way or I am missing something?
2. If the above is correct and as I used low temperature region regression curve then what about when the low curves are not flat (e.g.Right-hand figure below)? In this case is it better to use table method and do we still need to do extrapolation? If we still need extrapolation for other temperature ranges then how to find the point between low and high regions?
3. What if pipe correction and Part-load performance datasets/curves are not available, is there a workaround to model VRF systems in this case?

I have some actual weather data that contains global solar radiation values. I have noticed that it has positive and negative values at night time, please see below. Should it be zero during night time or I am missing something?

P.S: The unit is wrong for global solar radiation.

Hi, Does anyone know any online web tool that automatically generates revit models for performing energy simulations. I am interested in looking at its software architecture. Could you please guide me to some report or publication that explains its architecture or framework?

Thanks

Does anyone know the workflow to use revit models for performing steady state and dynamic energy simulations? I would appreciate if you could detail the steps required or guide me to some publications that has documented these steps. It would be great if you could mention the software that will be required e.g. Green Building Design Studio etc.

Also, what will the inputs that will be required to carry out Steady state and dynamic energy simulations in those software.

Thanks