Absorber diaphragm walls and absorber piles for harnessing and storing geothermal energy Shopping centre with office premises - Total surface area: 45,000 m2 - Retail space: 16,000 m2 - Office space: 7,000 m2 - Underground car park: 700 parking spaces - Client: DI Michael Auer, Wien - A - Architect: DI Ernst H. Huss, Wien - A - Building services consultant: Planungsgruppe Grünbichler GmbH & Co KG, Kapfenberg - A enercret installation: Activation of the diaphragm wall (12,400 m² equipped) and piles (300 piles; DN 120 cm, 7 m to 20 m long) was performed using approx. 90,000 linear metres of HDPE piping DN 25/2.3mm. The storage capacity of the ground is approx. 1,400 MWh. - Cooling capacity: ca. 1,400 kW - Heating capacity: ca. 1,200 kW - Cooling output/year: ca. 1,670 MWh - Heating output/year: ca. 660 MWh Benefits: - Energy stored instead of being wasted - Dual purpose of the refrigerator unit for cooling and heating - High performance rating of refrigerator unit/heat pump due to low temperature differences - Savings in respect of boiler and recooling installations - Pay-back time for the additional costs approx. 8 years due to low running costs - Reduction in CO2 emissions of approx. 500 tonnes/year, roughly equivalent to EUR 12,500 in consequential costs Project sheet download: To download the PDF file, please click here .* ) * ) To view PDF files you will need the Adobe Acrobat Reader. If you do not have this software, you can download the Acrobat Reader here free of charge.