Summary Cooling Design Table

The Cooling design summary tab provides these display options:

• 1-Zones - design cooling loads and flow rates for each zone plus other related data
• 2-Building totals - total building loads at the time of maximum total building cooling load

Zones

The Summary screen, 1-Zones display option shows design cooling loads and flow rates for each zone plus other related data.

• Design Capacity, shown in bold, is the maximum value of Total Cooling Load and Sensible multiplied by the Design margin to give the design cooling capacity of the equipment. This value is written into the Cooling capacity Model data on the HVAC tab if the appropriate Plant sizing Model Option is set.
• Design Flow Rate, shown in bold, is the flow rate required to deliver the Sensible cooling load using the Design supply temperature and the zone air temperature at the time of the maximum load multiplied by the Design margin.
• Total Cooling Load is the total maximum Sensible + Latent loads for the zone at the time of maximum Sensible Cooling load. If latent load is negative then it is ignored here and the Total Cooling Load is the same as the Sensible load.
• Sensible is the maximum Sensible Cooling load for the zone in the Design day.
• Latent is the latent load for the zone at the time of maximum Sensible load, calculated as Total Cooling - Sensible Cooling.
• Air Temperature is the Air temperature in the zone at the time of maximum Sensible load.
• Humidity is the humidity (%) in the zone at the time of maximum Sensible load.
• Time of Max Cooling - the time at which the maximum sensible cooling occurs.
• Max Op Temp in Day is the maximum operative temperature in the zone (using radiant fraction = 0.5) over the design day including periods when the zone may be unconditioned.
• Floor area is the floor area of the zone.
• Volume is the volume of the zone.
• Flow/Floor area (MBH/ft2 in IP units) is the Design Flow Rate divided by the Floor area of the zone. It provides a useful check for the flow rates calculated.

Building Totals

The Summary screen, 2-Building totals display option shows total building loads at the time of maximum total building cooling load.

• Max Total Design Cooling Load - shown in bold, is the maximum cooling load on the building under cooling design conditions multiplied by the Design margin to give the design cooling capacity of the equipment.

• Time of Max Total Cooling Load - the time of the maximum cooling load in the building.

• Sensible Cooling Load - the total building sensible cooling load at the time of max total cooling load.

  Latent Cooling Load - the total building latent cooling load at the time of max total cooling load.

• Total Cooling Load - sum of sensible and latent cooling loads at the time of max total cooling load.

Tip: Use the Export command to export summary data to spreadsheet format.