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Management of Aquifer Recharge and Energy Storage (MARES)

…..Aquifer Recharge and Storage

….Aquifer Thermal Energy Storage

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Management of Aquifer Recharge and Storage (MARS): 15% of drinking water in Holland

Bron drinkwaterproductie Leiduin

010

203040

5060

7080

1850

1862

1874

1886

1898

1910

1922

1934

1946

1958

1970

1982

1994

mln

m3/

jaar

Geinfiltreerd rivierwater (sinds 1957)Diep duinwater (sinds 1903)Ondiep duinwater(sinds 1853)

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MARS TECHNIQUES

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ATES wells (open system):

Summer Winter

Closed ATES system (tubes)

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Four products MARES project

• Quick scan technical feasibility of MARES in Romania

• Inventory of institutional and legal issues

• Preliminary designs

• Training of Romanian experts

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Quick Facts ATES

• Heating and cooling of buildings, offices, processes

• Saves up to 90% on primary energy and CO2

• Cooling without air conditioning• Using winter “cold” for cooling in summer• Using summer heat for heating in winter• Energy neutral system (after T)• Return on investment between 1 and 7 years

and also….• Using groundwater with average temperature of 5-15 oC• Wells in aquifer, between 20 till max 300 m -sl• No harmful effects for the environment or aquifer system• No smell, no noise, no visual effects

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Quick Facts (2) Development in Holland

1992 2008

534

214

271

353

438

485

537

679

829

0

100

200

300

400

500

600

700

800

900

1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008

Aantal projecten t/m 2005 (CBS, 2006 en 2007 is schatting)

End of 2008: >

1.000

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Usage

ATES can be used for:

• Office buildings;

• Hospitals and schools;

• Urban areas (as alternative of district heating);

• Private houses (different but similar technique);

• Appartment buildings

• Greenhouses;

• etc

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Example: office building (The Hague, NL)

• Office space of 35.000 m2

• Thermal energy demand• Cold 1.800 kW

• Heat 2.150 kW

• Conventional system was: district heating and cooling equipment (airco)

• Old system is changed by ATES with 4 wells

Result• Pay back time of additional investments for ATES: 4 years.• Reduction of costs for energy, € 800.000,-- over a period of 10 yrs

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Example: office building (Zwolle, NL)

• Office space of 28.500 m2• Thermal energy demand

• Cold 2.000 kW

• Heat 1.750 kW • Conventional system was: gas fired

boilers and cooling equipment• Old system changed by

ATES with 2 wells

Result: • Pay back time additional investment less then 2 years.• Reduction of energy costs, € 1.000.000 over a period of 10 yrs• The office produces a heat surplus.

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InformationATES wells and groundwater

abstraction wells (for drainage of civil construction site)

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InformationNormal situation

(without building pit drainage)

Planned situation

(with building pit drainage)

Cold groundwater lost by abstraction for building pit drainage

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Modelled well temperatures

7.0

8.0

9.0

10.0

11.0

12.0

13.0

14.0

15.0

16.0

17.0

Jan 09

Jan 10

Jan 11

Jan 12

Jan 13

Jan 14

Jan 15

Jan 16W

ell t

empe

ratu

re (°

C)

Cold - before pit drainage

Cold - without pit drainage

Cold - with pit drainage

Warm - before pit drainage

Warm - without pit drainage

Warm - with pit drainage

start pit drainage

end pit drainage

Temperature difference discharged groundwater due to building pit drainage

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Example: Hospital (Turkey)

Electrical energy saving of

• 3.250 MWh/year for cooling

• 1.000 m3 of oil for heating.

Total investment cost was calculated to

• roughly 1 million USD

Value of energy savings as

• approximately 500.000 USD

• pay-back time of 2 years

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MARS in Romania

• The underground might be feasible for MARS• Climate change – increasing droughts favors MARS• Strategic interests of ROC?• Energy and economic savings• Legal aspects under present laws might need adaptions

How to Realize?• Feasibility study (technical, economical, juridical)• Test drilling• Design and specification• Arrangement of permits• Selecting construction team• Construction and realization• Commissioning• Monitoring

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ATES in Romania

• The underground seems feasible for ATES• The climate is very suitable• Decrease of oil and gas dependence• CO2 and primary energy savings up to 90 %• Strong reduction on exploitation costs• Legal aspects under present laws might need adaptions

How to Realize?• Feasibility study (technical, economical, juridical)• Test drilling• Design and specification• Arrangement of permits• Selecting construction team• Construction and realization• Commissioning• Monitoring

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ATES in Romania: feasibility

Feasibility of the subsoil

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ATES in Romania: feasibility next step

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MARS in Romania: feasibility next step

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MARES planning

Table 1. Tentative planning Month after start of project Phase 1-2 3-4 5-6 7-8 9-10 11-14 1. Inception and Quick scan start

2. Elaboration phase: finalization of quick scan and data collection and interpretation

3. Practical tool development – field reconnaissance visits

4a. Preparation of training 4b. Study -discussion visit Holland 4c. Training seminar/design sessions Romania

5a. Elaboration designs in financing formats

5b. Final national conference

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For Quick Scan – Elaboration phase

Actions:

• Form team INHGA – AR – MoEF - BDG

• Quick scan inventory of what happens already (MARS and ATES) based on literature review, websearch etc.

• Connect with Gabardine project for MARS?

• Production of two national feasibility maps (MARS and ATES)

• Short description of top 10 regions/locations for MARS and ATES

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Information

• ATES and MARS (MARES) consortium in Romania: BDG,

• contact Mrs Florentina Nanu or Mrs Ioana Groza

• E-mail: florentina.nanu@bdgind.ro ; ioana.groza@bdgind.ro

• Telephone: +40723152330

Hydrological effects