Challenges and opportunities for the thermal use of groundwater in urban areas the Munich Case

Transcription

1 Challenges and opportunities for the thermal use of groundwater in urban areas the Munich Case TUM Chair of Hydrogeology SWM Service GmbH Kai Zosseder & Immanuel Pache GRETA Midterm Conference 7th of November 2017

2 Urban Areas Urban Areas Why are they special? Demand Climate Protection Aims Urban Climate Suburban Infrastructure CO 2 -Reduction aims of some metropolises until 2060 Data center of the city of Munich h4a Architekten Quelle: GRETA Midterm Conferenece 07/11/2017 Dr. K. Zosseder 2/21

3 Challenge for Urban Areas Increasing Energy Demand (Increasing Cooling Demand) Increasing Requirement for Climate Protection Ecological Efficiency (ressource efficiency) Ecological Sufficiency (mitigation) Ecological Consistency (renewable) Shallow Geothermal Energy can have a significant impact to Ecological Efficiency and Consistency GRETA Midterm Conferenece 07/11/2017 Dr. K. Zosseder 3/21

4 Thermal Use of Groundwater : Example Munich Source: Google GRETA Midterm Conferenece 07/11/2017 Dr. K. Zosseder 4/21

5 Munich Geology GRETA Midterm Conferenece 07/11/2017 Dr. K. Zosseder 5/21

6 Assessment of essential Geothermal Parameters Variables to estimate the available Volume Flux Aquifer Thickness Hydraulic Conductivity Depth to water table Groundwater flow direction Groundwater flow velocity Groundwater discharge Essential Geothermal Variable Volumen Flux Groundwater Temperature Potential Thermal Utilization Thermal Variables Groundwater-, Soil- and Airtemperature (temporal and local temperature variance; natural and anthropogenic Influences) Thermal Conductivity Heat Storage Capacity GRETA Midterm Conferenece 07/11/2017 Dr. K. Zosseder 6/21

7 Data acquisition and analysis Digital Drilling Database Analysis Daten borehole data Groundwater Measurement Groundwater depth (8000 Measurements/week) Groundwater temperature (1140 Meassurements/week) Hydraulic Conductivity about 500 Pump Test from Archive Data analysed Analysis of the existing thermal groundwater use Hydraulic Conductivity GRETA Midterm Conferenece 07/11/2017 Dr. K. Zosseder 7/21

8 Groundwater Thickness Heterogeneous Structure Legende: 0 m 20 m GRETA Midterm Conferenece 07/11/2017 Dr. K. Zosseder 8/21

9 Groundwater Temperature Example: Possibilites to use groundwater for cooling Groundwater Thickness Case 1: Profile (ca. 1 km length): High Groundwater Volume Flux, constant cold temperature good situation to use groundwater for cooling possible temperature spreading 5 K about 8 MW possible to use. [m] Case 2: Profile (ca. 1 km length): Low Groundwater Volume Flux, constant high groundwater temperature low possibility to use groundwater for cooling. GRETA Midterm Conferenece 07/11/2017 Dr. K. Zosseder 9/21

10 Heat Exchanger Heat Exchanger Cooling unit Low Temperature Heat Pump Thermal groundwater use of the SWM Overview of used technics district cooling with sewer pipe or well (cold groundwater direct /indirect use) heat supply with sewer pipe or well (groundwater heat) district cooling user indirect cooling direct cooling panel heating domestic hot water (exemplary) (exemplary) (exemplary) (exemplary) (exemplary) (exemplary) (exemplary) (exemplary) combination: Use waste cold High Temperature Heat Pump Use waste heat Heat Exchanger Sewer pipe Sewer pipe South system or well North South system or well North groundwater groundwater cold water warm water pump GRETA Midterm Conferenece 07/11/2017 Dr. K. Zosseder 10/21

11 Thermal groundwater use of the SWM Use of existing Subway Sewer Pipe Systems Subway plan of Munich Hydraulische Rückschlagklappe Förderpumpe Subway Sewer Pipe System Flux measurement in a sewer pipe, AUP Unterwassertechnik Groundwater Calculations GRETA Midterm Conferenece 07/11/2017 Dr. K. Zosseder 11/21

12 Thermal groundwater use of the SWM District cooling network BMW-FIZ 5 MW (255 l/s, 8 Mio. m³/a) 4,6 km distribution network BMW-FIZ Fernkälte: Verlegung der Rohrleitung cooling a data ceter Connecting 7 sewer pipe systems Well Sewer Pipe System Distribution systems to the data center BMW-FIZ Sewer pipe GRETA Midterm Conferenece 07/11/2017 Dr. K. Zosseder 12 12/21

13 Thermal groundwater use of the SWM District cooling network Moosach 2,5 MW (120 l/s, 2,8 Mio. m³/a) Cooling Supply for the data center of the city of Munich Status(2017) 2014 Data center of the city of Munich h4a Architekten High Volume Flux caused by a channel structure next to the user demand 2017 Well Cooling Demand Groundwater Thickness (blue) and Groundwater Levels (black), GRETA Midterm Conferenece 07/11/2017 Dr. K. Zosseder 13/21

14 2020 District cooling network Moosach 4.2 MW cooling, 0.8 MW heating 2014 SWM Bus Station Moosach JSWD Architekten 2020 Data center of the city of Munich h4a Architekten 2020 Well Expansion if necessary SWM Company Center Part Q Fritsch + Tschaidse Architekten Well Heat Demand Cooling Demand 2017 SWM ompany flats and kindergarden. KiTa Postillonstr. 3, Laux Architekten Additional Development of the cooling network In combination with the a heating demand Plan Status 2020 GRETA Midterm Conferenece SWM 07/11/2017 Dantebad Dr. K. Zosseder 14/21

15 Existing thermal groundwater usage heating cooling heating and cooling heating cooling heating and cooling GRETA Midterm Conferenece 07/11/2017 Dr. K. Zosseder 15/21

16 Existing thermal groundwater usage Amount of installations heating cooling heating and cooling Amount Sum Groundwater Extraction Approv. Amount [m 3 /a] heating cooling heating and cooling Cooling installations Monthly percentage Part of the anual Extraction - heating installations Sum [m 3 /a] Small Installations Annual Extraction < m 3 about. 26 Mio. m 3 /a = about 18% (1795 Systems = 91%) Large Installations Annual Extraction > m 3 about 117 Mio. m 3 /a = about 92% (173 Systems= 9%) Very large Installations Annual Extraction > 1 Mio. m 3 about 69 Mio. m 3 /a = about 48% (27 Systems= 1,4%) GRETA Midterm Conferenece 07/11/2017 Dr. K. Zosseder 16/21

17 Existing thermal groundwater usage GRETA Midterm Conferenece 07/11/2017 Dr. K. Zosseder 17/21

18 Thermal groundwater use of the SWM Stairs and Panel Heating Subway Station Therese Ghiese Alee GRETA Midterm Conferenece 07/11/2017 Dr. K. Zosseder 18/21

19 Thermal groundwater use of the SWM Stairs and Panel Heating Subway Station Therese Ghiese Alee Completely Snow and Ice-free Groundwater System: down to -10 C positive surface temperatures CO 2 -Pipe System: down to -20 C positive surface temperatures Primary energy consumption: Electrical Energy Pumps: 2234 kwh Electrical Energy additional sources: 290 kwh Sum: 2524 khw Area of 150 m 2 = 16.8 kwh/a*m 2 Before Restoration: kwh/a*m 2 GRETA Midterm Conferenece 07/11/2017 Dr. K. Zosseder 19/21

20 Thermal groundwater use of the SWM Conclusion & Outlook GW-Cooling System BMW-FIZ 5 MW Cooling GW-Cooling System SWM Zentrale 2 MW Cooling GW-Cooling System Moosach IT@M 2,5 MW Cooling GW-Cooling System MM-Druckerei 0,5 MW Cooling GW-Cooling/Heating System TÜV & MO82 2,2 & 0,7 MW Cooling / 1 MW Heating Further Project in development Trend Increasing demand of groundwater cooling in Munich Challenge Distance source - user User density structure Stronger legal restrictions Need Urban GW-Management Chances Use of Urban Infrastructure (Sewer Pipes) Development of integrated networks for cooling and heating demand GRETA Midterm Conferenece 07/11/2017 Dr. K. Zosseder 20/21

21 Thank you for your attention Dr. Kai Zosseder Telefon: FAX: WEB: Technische Universität München Lehrstuhl Hydrogeologie Arbeitsgruppe Geothermie Arcisstr. 21, Munich GRETA Midterm Conferenece 07/11/2017 Dr. K. Zosseder 21/21