General Green Building Approach:

- Median Building Envelope U-Value of 0,56 W/m2K including

tolerance for thermal bridges

- 100% Heating and Cooling over 114 Ground Probes, each 100m

deep, in 19 groups

- 2 Heat-Pump-Sets with 2 x 285 kW cooling capacity

(Teillastbetrieb, Ausfallsicherheit)

Building Element

建筑构件

Coefficient of Conduction

K[W/(㎡•K) 传导系数

Roof 屋面 0.3

External Wall 外墙 0.32

External façade

window 外窗

1.5 – 1.8

Sky light 天窗 1.8 – 2.1

Slab/floor/internal wall

楼板/地面/内墙

0.4

Cost Summary 费用汇总

Main equipment costs (RMB)

主要设备费用

Yearly operation costs

年度运行费用

ROI in yrs

年投资回报

Option 1 134 % 59 % 2.9 – 3.2

Option 2 (Standard Equip)

100 % 100 % -

Option 3 130 % 67 % 3.0 – 3.3

Option 4 142 % 66 % 3.9 – 4.2

Comparison of 4 system layouts for heating/cooling:

1. Geothermal heat pump with heat recovery for hot water, plus electrical water boiler back up. (Applied

System)

2. Air cooled heat pump and storage type electrical water boiler. (Standard Equipment System)

3. Geothermal heat pump without heat recovery for hot water and storage type electrical water boiler.

4. Geothermal heat pump with heat recovery for hot water with additional air cooled heat pump (cooling)

and electrical water boiler backup. This layout considers the underground soil heat

energy balancing between summer and winter heat charging and heat extraction. Summer/Winter

heat-balance-relation is about 2.5.

Green Building: Porsche Experience Center

Green Building: BMW New Engine Plant

Cost Summary First costs

(RMB)

Yearly operational

costs cut off

(RMB / year)

CO2-emission

cut off

(tons of CO2 / year)

Minimum Energy &

Water saving Performance

Option 1 785,000 600,000 1,572 ☆☆

Option 2 3,200,000 1,270,000 3,329 ☆☆

Option 3 -1,862,000 701,000 1,136 ☆

Option 4 -83,000 42,500 69 ☆

Option 5 -89,500 17,500 29 ☆

Option 6 58,000 9,900 -- ☆

Option 7 8,510,000 5,430,000 8,806 ☆☆☆

Option 8 - 689,000 1,131 ☆☆

Eight applied HVAC-system optimizations totaling savings

of 16,072 tons of CO2 per year:

1. Advanced air handling units – Energy recovery with rotation

heat exchanger.

2. Advanced air handling units – Heat recovery of process

cooling incl. waste heat of the compressors of compressed air

production.

3. Reductions of outdoor air change by optimizing duct routing

and outlet positions.

4. Minimizing external thermal loads by means of opaque roof

smoke and heat exhaust devices.

5. Abandonment of hot water supply for the restrooms.

7. Planning of ground water use for cooling.

8. Reductions of outdoor air change by optimizing duct routing

and outlet positions.