Progetto SIMEA - Automatica - Università degli Studi di Padova
Progetto SIMEA - Automatica - Università degli Studi di Padova
Progetto SIMEA - Automatica - Università degli Studi di Padova
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<strong>SIMEA</strong> Stato dell’arte energetica <strong>degli</strong> e<strong>di</strong>fici<br />
1.2.32.5. Output<br />
62<br />
Doc.No 20100610.<strong>SIMEA</strong>.MR.03<br />
Versione 1<br />
A single zone IDA ICE model with default primary and secondary systems, comprises a total of about<br />
600 time dependent variables, any of which may be plotted, such as: zone heat balance, inclu<strong>di</strong>ng specific<br />
contributions from: sun, occupants, equipment, lights, ventilation, heating and cooling devices, surface<br />
transmissions, air leakage, cold bridges and furniture. Solar influx through windows with full 3D account for<br />
local sha<strong>di</strong>ng devices. Air CO2 and moisture levels. Air and surface temperatures. Comfort in<strong>di</strong>ces, PPD and<br />
PMV, Total energy cost, based on time-dependent prices.<br />
1.2.32.6. Computer Platform<br />
PC with Windows 95/98/NT. Minimum 16 MB of RAM memory and 20 MB of free hard-<strong>di</strong>sk space<br />
are needed.<br />
1.2.32.7. Programming Language<br />
Common Lisp, Fortran<br />
1.2.32.8. Strengths<br />
IDA ICE has been requested, specified and partly financed by a group of thirty lea<strong>di</strong>ng Scan<strong>di</strong>navian<br />
AEC companies. The mathematical models have been developed at the Royal Institute of Technology in<br />
Stockholm (KTH) and at Helsinki University of Technology. The models are not tailored to Scan<strong>di</strong>navian<br />
needs but seek to capture the international state-of-the-art in buil<strong>di</strong>ng performance modelling. Whenever<br />
appropriate, models recommended by ASHRAE have been used.<br />
1.2.32.9. Weaknesses<br />
Execution time is highly dependent on model structure and control. A yearly simulation of a ten zone<br />
model takes ten minutes on an 450 MHz PC. The execution time increases roughly in proportion to the<br />
number of zones.