The simulation tool employed in the present study for predicting the energy performance of the SIEEB building is the DOE 2.1 building energy simulation programme developed by Lawrence Berkley Laboratory (1980). Based on preliminary design of SIEEB, the characteristics of building are defined in Table 1.
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Table 1. SIEEB characteristics — Preliminary design
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Location
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Tsinghua University, Beijing (Latitude: 39° 48’ N, Longitude: 116° 28’ E)
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Building type
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Office building, 10 storeys above ground + 2 storyes underground
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Floor area
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Total floor area — 15,107 m2 Air-conditioned area — 12,226 m2
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Building Envelop
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Exterior wall
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Plaster+18cm hollow brick+ 6cm insulation+8cm hollow brick+plaster U value = 0.40 W/m2 K
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Window
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South, East & West
5mm glass (low-e)+22mm air-gap with Venetian blinds+6 mm glass (low-e) U-value = 1.3 W/m2 K, Shading coefficient = 0.63 North & Interior Court
5mm glass (low-e)+15mm gap filled with argon gas +6 mm glass (low-e) U-value = 1.1 W/m2 K, Shading coefficient = 0.63
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Roof
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1cm ceramic+2cm concrete + 6cm insulation+25cm hollow brick+plaster U-value = 0.42 W/m2 K
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Ratio Glazing to total area
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South = 42%, East and West = 34% and North = 14%
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The preliminary design of the SIEEB is shown in figure 2.
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