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conditions. Four txt file were created with the same setting values in SST, then imported
into the TRNSYS Studio and finally connected to the type that contains Room parameters
with the Type 9a. These files are:

Tempext: It contains 24 values of the external temperature, one for each hour;

Sun Irrad: It contains 24 values of the solar irradiation depending which external
orientation is needed, one for each hour;

Mass flow: It contains 24 values of the mass flow in kg/h depending which case is
simulated, one for each hour. Hence, 24 equal values for the continuous mode
operation or 12 values when the system is turned on and 12 null values when it is
turned off;

TempSky:
It contains 24 values of the sky temperature, one for each hour.
According to the ASHRAE code, hourly temperatures given the hour (1-24) are
depending by the peak temperature, the daily range and multiplied by the
coefficient p(τ).
With regard to other necessary meteorological parameters in Trnsys, the type TempSky is
connected to the Type 15-3 where the weather data of Venice are implemented in it, as in
the case analyzed in SST. The type required to view the results is the Type 65c in which is
possible to select the parameters to be displayed and the position in order to save the
results in txt file.
Finally, the simulation was run and the Figure 44 shows an example of results.
Figure 44- Trnsys results with the trends of the internal, operative, external and return water
temperature
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