Grad Velika Gorica - ekoregija.vg€¦ · Grad Velika Gorica Presentation: ... During 2012 all the data on energy consumption has been entered into the national electronic database

Grad Velika Gorica

Presentation: Marko Ruzic, Dipl. Ing. Biology-Ecology

City of Velika Gorica, Croatia

Republic of Croatia – youngest member state of the European Union (July 1st 2013)



The state capital, City of Zagreb is situated north from the river Sava


City of Velika Gorica is located just south from Zagreb, in the lowlands area of Turopolje, mostly at the average altitude of 105 m above sea level

City of Velika Gorica


City of Velika Gorica is the largest city of the Zagreb County, and with its 63.000 inhabitants is also the 6th largest city in Croatia



The city area is 329 square kilometres and consists of 58 settlements, Velika Gorica being the largest with 32.000 inhabitants

Velika Gorica

Zagreb


Total population density is 193 inhabitants per square kilometer, but the urban area of Velika Gorica has 1.053 inhabitants per sq kilometer

Velika Gorica Velika Gorica


The city area can be divided in 3 regions – Posavina, Turopolje, and southern hilly terrain – Vukomericke gorice (with highest peak only 250 m above the sea level)


The urban area of Velika Gorica occupies approximately 10 sq km, situated just south of the Zagreb airport


A view of Velika Gorica from the direction of Zagreb


Center of the town with a few historic buildings


Mostly 1970’s and 1980’s architecture in the central part of the town, with collective housing buildings

During the 1970’s and 1980’s period of carefully planned building of collective housing, district heating was the commonly chosen option because of its feasibility and simplicity – heat produced at one place being locally distributed and paid on the basis of the heated area of a building as well as every single apartment

Natural gas was not available at that time, so preproduced heat was simplest means of energy distribution

DH Networks of Velika Gorica

DH Networks of Velika Gorica

Only the central part of the urban area is covered with DH networks, which are not completely interconected, with 14 heating plants and 34 boilers operated by the national utility company

District Heating Networks of Velika Gorica

Source: HEP Toplinarstvo d.o.o., Zagreb 2014.


District Heating Plants in Velika Gorica


12 of 14 heating plants powered by extra-light and light fuel oil, only 2 being powered by natural gas #

Owned and operated by the national utility company HEP Toplinarstvo

No. Address of Heating Plant Installed

power (MW)

Leased

power (MW)

1. Matije Magdalenica 3 (G1) 18,50 17,62

2. Vidriceva 1 # (G3) 19,78 17,99

3. Jurja Dobrile 40a 4,36 3,52

4. Jurja Dobrile 8 2,73 1,89

5. Zagrebacka 126 2,00 1,15

6. Domjaniceva 3 2,20 2,16

7. Zagrebacka 71 1,00 0,45

8. Zagrebacka 19 0,30 0,26

9. Zagrebacka 12 0,10 0,11

10. Cvjetno naselje 18 5,23 2,76

11. Zvonimirova 9 8,33 6,93

12. Trg kralja Tomislava 34 2,27 1,28

13. Emilija Laszowskog 35 1,20 0,49

14. Sibenska # 21 1,63 2,00

TOTAL 69,63 58,61


Zvonimirova 9 – 8,33 MW


Cvjetno naselje 18 – 5,23 MW


Jurja Dobrile 8 – 2,73 MW


Jurja Dobrile 40a – 4,36 MW


Zagrebacka 126 – 2,00 MW


Sibenska 21 – 2,00 MW (natural gas)


Vidriceva 1 (G3) – 19,78 MW (natural gas + extra-light fuel oil)


Matije Magdalenica 3 (G1) – 19,78 MW Under the water tower!

The Covenant of Mayors

Mr. Drazen Barisic, Mayor of the City of Velika Gorica, had signed the Covenant of Mayors on March 15th 2010

Sustainable Energy Action Plan (SEAP) accepted by the City Council in 2011 – worked out in cooperation with the Regional Energy Agency of Northwest Croatia (REGEA)

Primary Energy Consumption

Source: REGEA

Energy Efficiency in Public Sector

During 2012 all the data on energy consumption has been entered into the national electronic database and persons responsible for the supervision of energy consumption in public buildings have been appointed

During 2013 energy audits of public buildings owned by the City of Velika Gorica have been carried out (40 buildings – schools, kindergartens, public administration, culture, sports, fire-fighting), and energy certificates have been publicly displayed

Residential buildings:

A+ 0

A 0 B 0 C 11 D 19 E 6 F 2 G 0

Public buildings:

A+ 0

A 0 B 0 C 4 D 15 E 10 F 6 G 5

Energy Efficiency of Buildings

Energy classes of buildings audited before 2014:


Residential buildings connected to DH networks:

337.000 sq metres of heated area (residential and commercial)


5.650 apartments

1.367 apartments equipped with individual heat consumption metering during 2013




9.800 metres of heat-pipes

121 heat-exchange substations

Energy Efficiency Problems

Poor insulation, glazing, worn-out materials, no individual consumption metering in most cases

Energy Efficiency Solutions

Possible solutions, being financially subsidized from the Croatian Fund for environmental protection and energy efficiency, as well as counties and cities:

Energy renovation of buildings (thermal envelope, glazing, individualization of energy consumption metering, promotion of utilizing low-E consumption household equipment and lighting systems)

Introduction of renewable energy heating/cooling sources – solar, geothermal, biomass, biogas

DH Networks Renovation Possibilities

Lowering heat losses by instalation of new, better insulated heat-pipes

Interconection of fragmented DH networks, retirement of smaller, non-feasible heating plants

Renovation of plants to be utilized in the future by the instalation of new heat production and heat-exchange equipment, lowering heat losses by lowering working temperatures when it would become possible

Installation of equipment for utilizing renewable energy sources – solar heating plants, biomass burners, biogas motors – co-generation of heat and electricity to heighten the feasibility of primary energy production

Possible Role of STRATEGO Project

Inspection of real primary energy demands for the installed DH network, especially after renovation of buildings

Working out some future scenarios on energy demand and production

Proposal of possible technologies for the energy production, distribution, saving – especially when locally available renewables are in question

A Negative Example from Practice

Avoid problems with NIMBY sindrome, as well as heat losses – build the heating plant near consumers!

During 2011 HEP Obnovljivi izvori energije (RES) tried to prepare the documentation for the investment of cca 80 million EUR to build the Biomass Co-generation Plant near Velika Gorica, but the project had failed at the public debate in local community during the environmental impact assessment process

Utilization of renewables is not an automatic guarantee for success!

Marko Ruzic, Dipl. Ing. Biology-Ecology Head of Environment Office City of Velika Gorica, Department of Urban Planning and Environmental Protection Tel. +385 1 6269-961, e-mail: [email protected]

mailto:[email protected]



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Grad Velika Gorica - ekoregija.vg€¦ · Grad Velika Gorica Presentation: ... During 2012 all the data on energy consumption has been entered into the national electronic database