San Francisco / High Gains
| Case Name | Airflow | Flow Pattern | Cooling Source | EnergyPlus Input file |
Spreadsheet Results File |
| MEC | Mechanical | Mixing | Cooled air | ||
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Description In this case the single zone office building will be cooled using mechanical all air cooling (VAV) with displacement (DV) or mixing ventilation (MX). |
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Cooling Strategy Mechanically cooled variable air volume with free cooling (using 100% outside air when possible). |
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EnergyPlus Models Used Systems modeling, UCSD DisplacementVentilation model. |
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Simulation Results  |
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Analysis The disadvantages of using mixing ventilation are clearly shown in the predicted cooling energy demand for this case. Increased energy demand is due to the loss in free cooling capacity as a result of increased inflow temperature (typically 15ºC in MX versus 19ºC in DV systems). The mild San Francisco climate is very suitable for energy savings by displacement ventilation (there are many hours where the outside temperature is lower than 19ºC). |
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