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Dubrovačko-neretvanska županija -
geotermalni potencijal i instalirani
sustav u OŠ Opuzen
doc.dr.sc.Tomislav Kurevija
Prva komercijalna dizalica topline instalirana 1938. U
Zurichu, za grijanje gradskog poglavarstva. Mirovina sa 76
navršenih godina?
Dizalice topline s tlom kao izvorom toplinske energije
Nalazišta geotermalnih ležišta
Balneologija – najstariji oblik iskorištavanja GTE
Gradinje - Istra
SZ
Hrvatske
Mokošica Dubrovnik
○ dosadašnja istraživanja geotermalne energije u RH većinom
zasnivana na dubokim geotermalnim ležištima i vodonosnicima
naftnih i plinskih polja
○ pojam ‘’plitka geotermalna energija’’ - način energetskog
iskorištavanja toplinske energije pomoću dizalica topline
○ modeliranje sustava polja zemnih izmjenjivača topline i korištenje
tla kao obnovljivog izvora energije u funkcionalnoj je vezi s pet
osnovnih varijabli koje je nužno poznavati:
1) geološke i termodinamičke značajke tla i stijena – ‘’termogeologija’’,
2) hidrogeološke karakteristike,
3) geotermalni gradijenti i toplinski tok,
4) klimatski uvjeti lokacije
5) tehnoekonomski parametri (temperatura distribucije –> COP, EER)
Plitka geotermalna energija
6
Pretežno
nekonsolidirani
klastiti (pijesci,
šljunak, gline)
Pojava
podzemnih
voda, zasićenost
tla vodom!
Pretežno
karbonatne
stijene (vapnenci
i dolomiti)
Izražena
sekundarna
poroznost (krš)
Geološke karakteristike - RH
Hidrogeološke karakteristike
Geotermalni gradijent
Zemni izmjenjivači topline u sustavu s dizalicom topline
(a) VERTIKALAN SUSTAV (cca 100 m)
iskorištavanje plitkih geotermalnih potencijala
“Geotermalne dizalice topline”
(b) POVRŠINSKI SUSTAV (1,5-10 m)
solarna energija pohranjena u tlu
(c) DVIJE BUŠOTINE (PROIZVODNA I UTISNA)
većinom solarna energija+geotermalna energija
ovisno o dubini vodonosnika i tipu izvora
(d) SUSTAV S POVRŠINSKOM VODOM (more,
rijeke, jezera) solarna energija pohranjena u
površinskim vodama
Bušotinski izmjenjivači topline – 1U ili 2U najčešće 100m
Bušotinski izmjenjivači topline – 1U ili 2U najčešće 100m
Koaksijalni bušotinski izmjenjivači - do cca 40m dubine
Koaksijalni bušotinski izmjenjivači - do cca 40m dubine
Horizontalni izmjenjivači ~ 1,5m
Energetski piloti pri temeljenju – do 10m – Giznik/Samobor
Energetske košare i spirale – do 5m – Opuzen
Energetske košare i spirale – do 5m – Opuzen
0
100
200
300
400
500
600
700
800
900
1000
1100
1200
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
Temperatura tla, °C
Dubina,cm
Siječanj
Veljača
Ožujak
Travanj
Svibanj
Lipanj
Srpanj
Kolovoz
Rujan
Listopad
Studeni
Prosinac
Prikaz srednjih mjesečnih
temperatura tla u
zavisnosti o promjeni
dubine za lokaciju
Statička temperatura tla
Monitoring temperatura
http://cns-dunea-opuzen.ekoplam.hr/default_iframe_hr.aspx
HVALA NA PAŽNJI !

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