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bramvdh91 / modelica-ibpsa

Modelica libraries that are used and/or developed within IEA EBC Annex 60
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Replace AIT temperature sensors with two-port version #57

Closed bramvdh91 closed 7 years ago

bramvdh91 commented 7 years ago

I have added a branch where the single port temperature sensors are replaced by the two-port equivalent. By activating the cooling-down function with an ambient temperature of 20°C, a better approximation of the cooling of the real sensors is achieved. Furthermore, I would propose to make the zero-flow for substation 4 actually zero, so to remove the glitches, since they are not represented in the measurement data.

bramvdh91 commented 7 years ago

See 4d1d758518ee48ecaa4ea0dbb4335664425bab1c

bramvdh91 commented 7 years ago

With the two-port temperature sensors and after removing the noise of the mass flow sensor around 0, I got the following results: validationpipeait

We still seem to struggle with a quite long delay with respect to the measurements. Maybe there is something wrong with the length or diameter of the pipe?

bramvdh91 commented 7 years ago

@carlesRT , I would prefer to use the actual outlet temperature in the paper instead of the T_out_b, since this one does not show the quick dips in the outlet temperature, whereas the figure above does show them.

carlesRT commented 7 years ago

Shall we use the same temperature sensors and filtered mass flow rate in point 4 for the MSL example?

bramvdh91 commented 7 years ago

I think that’s a good idea. I forgot to make those changes in the other examples, I can add those as well. I believe that this filter is necessary because those short mass flow increases are not at all reflected in the measurements, so I suppose this is just measurement noise.

From: Carles [mailto:notifications@github.com] Sent: maandag 28 november 2016 13:14 To: bramvdh91/modelica-annex60 Cc: Bram van der Heijde; Assign Subject: Re: [bramvdh91/modelica-annex60] Replace AIT temperature sensors with two-port version (#57)

Shall we use the same temperature sensors and filtered mass flow rate in point 4 for the MSL example?

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