Case Studies from Hungary Laszlo Toth Msc. Geologist, Project Manager THE GEOTHERMAL HEAT PUMPS MARKET IN CENTRAL & EASTERN EUROPE BRATISLAVA

- 1. History - HGD Ltd Raiffeisen Bank, Back Office - 3. New Governmental District AGENDA

Introduce the HGD Ltd – foundation – first GSHP systems (family houses, car saloons) – first large GSHP system - Large GSHP systems - Oriental Herbs (325 kW, 60 BHE), Páty, Warehouse (610 kW, 120 BHE), Raiffeisen Bank (818 kW, 81 BHE), Pannon (960 kW, 180 BHE), 2007 – under construction

OFFICE BUILDING WITH GSHP Raiffeisen Bank, Back Office in Budapest

Geology Temperature log OFFICE BUILDING WITH GSHP Raiffeisen Bank, Back Office in Budapest

A TRT was done to determine the thermal properties of the ground OFFICE BUILDING WITH GSHP Raiffeisen Bank, Back Office in Budapest Thermal Response Test: λ = 2,61 W/mK

Drilling at Raiffeisen Bank (total: 8,1 km drilling) OFFICE BUILDING WITH GSHP Raiffeisen Bank, Back Office in Budapest Finished BHEs On top of the BHE field today a parking lot is located

Heating control room OFFICE BUILDING WITH GSHP Raiffeisen Bank, Back Office in Budapest 3 large heat pumps for heating – cooling, 1 heat pump for DHW 3 large heat pumps for heating – cooling, 1 heat pump for DHW

OFFICE BUILDING WITH GSHP Raiffeisen Bank, Back Office in Budapest Savings: €/year Payback: 8 year CO 2 reduction: 283 t/year

STATE INSTITUTION WITH GSHP New Governmental District in Budapest

STATE INSTITUTION WITH GSHP New Governmental District in Budapest

Prospective drilling, 128 m deep STATE INSTITUTION WITH GSHP New Governmental District in Budapest Drilling for water and observation wells

STATE INSTITUTION WITH GSHP New Governmental District in Budapest Geology Temperature log

STATE INSTITUTION WITH GSHP New Governmental District in Budapest -72 hours TRT - Hydraulic tests (2 water wells,2 observation wells) - pumping test, recovery test - Hydraulic model (Processing Modflow) - Calculation for number of BHE

Closed loop and water source heat pump system: - heating demand – completely covered - cooling demand – partly covered (50%) ↓ remaining 50%? - air-source heat pump? RESULTS: -Thermal Response Test: λ=1,98 W/mK → appr. 500 BHE (125 m) → total BHE length: m!!! - Hydraulic test: k=80 m/day → 2000 m 3 /day (groundwater) ↓ New Governmental District in Budapest STATE INSTITUTION WITH GSHP

Planned tasks: STATE INSTITUTION WITH GSHP New Governmental District in Budapest -More detailed heat transport model -More detailed hydraulic model -1-4 weeks long hydraulic test/pumping test - Examine the influence of the Danube

THANK YOU FOR YOUR ATTENTION! 1141 Budapest, Zsigárd u.21. Tel:+36(1) ; Fax:+36(1)