Getting Started — EnergyPlus 9.1

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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

Schematic for Exercise 2. [fig:schematic-for-exercise-2.]

Schematic for Exercise 2. [fig: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)