Unitary System and VAV using HVACTemplate Inputs[LINK]

Overview[LINK]

• Rectangular single story building with 5 occupied zones and a ceiling plenum

• Packaged DX cooling with gas heat serving one zone

• VAV with reheat and return plenum serving the other 4 zones

• All equipment autosized using summer and winter design days

Figure 20. Schematic for Exercise 2.

Details of the Exercise[LINK]

Building Description[LINK]

• Single floor rectangular building 30.5 m (100 ft) by 15.2 m (50 ft) by 3m (10 ft) high.

• Building is oriented with the long axis running east-west.

• Floor Area 463.6 m2 (5000 ft2).

• 5 occupied zones - 4 exterior, 1 interior, zone height 2.4 m (8 ft). Exterior zone depth is 3.7 m (12 ft).

• 1 plenum zone 0.6 m (2 ft) high.

• Windows on all 4 facades

• South and north facades have glass doors.

• South facing glass is shaded by overhangs.

• Walls are wood shingle over plywood, insulation, and gypsum board.

• Roof is gravel built up roof with mineral board insulation and plywood sheathing.

• Floor slab is 0.1 m (4 in) heavy concrete.

• Windows and glass doors are double pane Low-e clear glass with argon gap.

• Window to wall ratio is approximately 0.3.

• Lighting is 16 W/m2 (1.5 W/ft2).

• Office electric equipment is 10.8 W/m2 (1.0 W/ft2).

• 1 occupant per 9.3 m2 (100 ft2) of floor area.

• Infiltration is 0.25 air changes per hour (always on, proportional to wind speed).

• * Refers to specific glass type included in the EnergyPlus datasets directory

• (WindowGlassMaterials.idf)

Space Conditioning[LINK]

• Heating setpoints: 21.1C (70F) occupied, 12.8C (55F) unoccupied

• Cooling setpoints: 23.9C (75F) occupied, 40.0C (104F, system off) unoccupied

• Plenum zone not controlled

Environment[LINK]

• Location: Chicago, Illinois, USA

• Design Days: Summer, Winter

• Annual Simulation Period: Jan 1 – Dec 31

• Ground Temperatures: from Slab preprocessor (20.4 to 23.0 C)