Saving Energy and reduction of CO 2 Aquifer

Saving Energy and reduction of CO 2…. …. . Aquifer Thermal Energy Storage (ATES) makes it possible 1

ATES: How it works : Summer 2 Winter

Quick Facts • • Heating and cooling of buildings, offices, processes Saves up to 90% on primary energy and CO 2 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 o. C • 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 3

Quick Facts (2) Development in Holland 1992 2008 End of 2008: > 1. 000 4

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 5

Example: office building (The Hague, NL) • Office space of 35. 000 m 2 • Thermal energy demand • Cold 1. 800 k. W • Heat 2. 150 k. W • 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 6

Example: office building (Zwolle, NL) • Office space of 28. 500 m 2 • Thermal energy demand • • Cold 2. 000 k. W Heat 1. 750 k. W • 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 over a period of 10 yrs • The office produces a heat surplus. 7

ATES wells and groundwater Information abstraction wells (for drainage of civil construction site) 8

Normal situation Information Planned situation (without building pit drainage) (with building pit drainage) Cold groundwater lost by abstraction for building pit drainage 9

Modelled well temperatures Temperature difference discharged groundwater due to building pit drainage 10

Example: Hospital (Turkey) Electrical energy saving of • 3. 250 MWh/year for cooling • 1. 000 m 3 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 11

ATES in Romania • • • The underground is feasible for ATES The climate is very suitable Decrease of oil and gas dependence CO 2 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 12

ATES in Romania: feasibility Feasibility of the subsoil 13

Information • • ATES consortium in Romania: BDG, contact Mrs Florentina Nanu or Mrs Ioana Groza E-mail: florentina. nanu@bdgind. ro ; ioana. groza@bdgind. ro Telephone: Hydrological effects 14