North Light and Pole Star GDF SUEZ

Transcription

1 North Light and Pole Star GDF SUEZ Sustainable heat and cold production with Borehole Thermal Energy Storage by Gautier BAUDRU TECHNUM (Tractebel Engineering) CHOOSE EXPERTS, FIND PARTNERS Mai 2013

2 2 TABLE OF CONTENT 1 - SCOPE 2 - REFERENCE MODEL 3 - CONFIGURATION BTES 4 - RESULTS OF SIMULATION 5 - SIMULATION GROUND TEMPERATURE 6 - CONSTRUCTION 7 - AUTHORIZATIONS AND PERMITS 8 - FINANCIAL SUPPORT 9 - CONCLUSION

3 3 DESCRIPTION REFERENCE MODEL Cooling Heating Energy source Elec Gas Efficiency (COP / %) 2,8 90% Generation type Air cooled Chiller Cond Gas boiler Schedule u u CO2 emission Elek 395 kg CO2/MWhe BIM CO2 emission Gas 217 kg CO2/MWhg BIM

4 4 DESCRIPTION REFERENCE MODEL Work schedule Week schedule u Mon Fri Floor surface m² Levels +14 Temperature Winter 22 C Temperature Summer 25 C Volume m³ Glass vs shell 70% Ventilation m³/h Uglass 0.7 W/m² K (g= 0.24) Ventilation 40 m³/h per person R wall 0.3 W/m² K Vent Recuperation 60% recuperation R roof 0.3 W/m² K Equipment 25 W/m² (40%) R floor 0.58 W/m² K Lights 10 W/m² Infiltration 0.3 ACH Persons 70 W/pp Climate data Ukkel (typical)

5 5 DESCRIPTION REFERENCE MODEL

6 6 DESCRIPTION REFERENCE MODEL North East South

7 7 Cumulative heat and cool load

8 8 Configuration BTES

9 9 Properties ground layers Température souterrain 0 C (m)

10 10 Simulation ground temperature Medium temperature evolution of fluid (unbalanced)

11 11 Simulation ground temperature Medium temperature evolution of fluid (balanced)

12 12 RESULTS OF SIMULATION Annual heating demand: 3 GWh (North Light + Pole Star) Annual Cooling demand: 2.4 GWh (North Light + Pole Star) Sustainable Heating productions: 1.4 GWh (45%) Sustainable Cooling productions: 1.3 GWh (54%) Reduction primary energy: 1.3 GWh/year (-22%) Reduction CO2 emission: 286 Ton/year (-27%) NB : IBGE agreement

13 Sustainable heat and cold production with Borehole Thermal Energy Storage Mai HYDRAULIC SCHEME Tower CDH2 Tower CDH1 Chiller3 Turbo Chiller 4 13 / 17 C HX Chiller 1 Turbo Chiller 2 7 / 13 C 50 / 40 C Cond Boiler 1 Cond Boiler 2 50 / 40 C Users outputs PAC1 PAC2 Users outputs HX 7 / 13 C HX HX Users outputs HX Users outputs geocool geotherm Geothermic field

14 14 CONSTRUCTION

15 15 CONSTRUCTION Water pressure testing before construction Boreholes situation (every 5,5 m) Ground preparation

16 Sustainable heat and cold production with Borehole Thermal Energy Storage Mai CONSTRUCTION Boreholes realization + water pressure Water level increase

17 17 CONSTRUCTION Horizontal piping realization + water pressure testing + air purge Filling with sand + cement Borehole head

18 18 CONSTRUCTION Preparation of collector construction Collector construction

19 19 CONSTRUCTION Concrete civil works Water pressure testing + hydraulic balance + air purge

20 20 AUTHORIZATIONS AND PERMITS Env. Permit depends on the type of geothermal system Borehole thermal energy storage (BTES) : heat pump may require an env. permit Class 2 3 : no declaration in function of electrical power (item : 132) competent authority = municipality or IBGE if public applicant 60 days of procedure Aquifer thermal energy storage (ATES) : environmental permit + authorization - extraction of groundwater 1A 1B 2 class in function pumped waterflow (items : 62, 222, 223) competent authority = IBGE 60 to 450 days of procedure In both cases, the request for a permit must contain a technical description of the system and its characteristics (building, HVAC system, integration of the geothermal system, geological profile, systems foreseen to reduce env. impact)

21 21 AUTHORIZATIONS AND PERMITS Recommendations from the Brussels Institute for Management of the Environment (IBGE/BIM) Drilling operations and probe installation in wells - Maximum drilling depth - Precautions before drilling operations - Drilling operations - Probe installation in drilling wells - Documents to be submitted on drilling operations Requirements with regard to network and geothermal probes - Characteristics of the system - Requirements for materials used - Compartmentalization of network (maximum 5 probes grouped in series) and leak detection (manometer + alarm)

22 22 AUTHORIZATIONS AND PERMITS Recommendations from the Brussels Institute for Management of the Environment (IBGE/BIM) (continued) Requirements with regard to activating a geothermal system - Activation test - Heat conducting fluid circulating in probes - Documents to be submitted before activating system (leakage test, methods for monitoring the installation, plan for monitoring ground water) Maintenance of installations (filling on request of IBGE/BIM, etc.) Monitoring: energy (metering), temperature (temperature of heat conducting fluid between 0 C and 25 C) Reporting to IBGE/BIM Specific operating conditions (fluid temperature limit) - control and steps to be taken in the event of malfunction

23 23 FINANCIAL SUPPORT Additional costs for a geothermal installation (in addition to the cost of the geothermal field and heat pump) Thermal response test (TRT) Drawdown of ground water Drilling mud - backfill Collector protection Supplement for steel if spillway and geothermal system under building (influences stability) Surveyor

24 24 FINANCIAL SUPPORT 2012 energy subsidies for buildings in the service and industrial sectors - details available online Compliance with European regulations - de minimis rule for companies (amount of subsidies < EUR 200,000 over 3 years) D3 renewable energy subsidies (including geothermal systems - 25% of the cost of studies - supply and installation) C4 renewable energy subsidies (heat pumps solely for renovations - 25 to 30% of the amount for supplying and installing a non-reversible heat pump) You can only apply for a subsidy once the work has been done

25 25 FINANCIAL SUPPORT Documents required when applying for a subsidy: Subsidy application form Technical documents: design study for installation Technical specifications A copy of the detailed quote which has been signed to order the services to be provided Copies of the invoices for the services provided Copies of proof of payments Proof of the right to the property to which the subsidy relates Minimum 3 good photos of the installations, taken from different angles before the work Minimum 3 good photos of the installations, taken from different angles after the work

26 26 PHOTOVOLTAIQUE 500 pieces Area of 750 m² 120 kwc kwh/year

27 Sustainable heat and cold production with Borehole Thermal Energy Storage Mai CONCLUSION Complex design (thermal simulations, loads balance, ), but about 50% of cooling and heating demand of the whole complex handled by the geothermal system Great energetical and environmental savings (about 20 to 30 % compared to conventional system) Construction difficulties (under building, civil works interaction ) => great attention required during execution Authorizations and permits Financial support