San Diego / Low 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). Although Displacement Ventilation still results in significant energy savings (more than 30%) it is clear that the benefits are lower in the warmer San Diego climate (compared with San Francisco). |
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