Does 2007 differentiate? It's been a while...probably open loop. The closed loop tower possibly performs a little less effectively, but has other real world advantages. I'm betting the performance gap is small, but don't have any experience to say for sure.
ÂOther questions relative to Table 6.8.1G of ASHRAE 90.1-2007:
- for the baseline model (System 8) shall I consider "open-circuit cooling towers" or "closed-circuit cooling towers"?- how could the required performance be imposed in EnergyPlus? I'm using the object CoolingTower:TwoSpeedBest Regards