Andreu, Javier Felipe and Schneider, Daniel Rolph and Krajačić, Goran (2015) Evaluation of integration of solar energy into the district heating system of the City of Velika Gorica. = Evaluation of integration of solar energy into the district heating system of the City of Velika Gorica. In: 10th Conference on Sustainable Development of Energy, Water and Environment Systems – SDEWES Conference, 27.09.2015.-02.10.2015., Dubrovnik, Hrvatska.
Full text not available from this repository.Abstract
In the current situation the City of Velika Gorica (the “City”) faces several key issues regarding its thermal energy consumption. The thermal consumption in the City is 197.34 GWh where 20% is supplied by firewood, 2% by electricity, 15 % by fuel oil, 31% natural gas and 32% by the district heating system. In the district heating sector the main issue is the utilization of 14 small and distributed heat plants, each providing heat to a separate and individually disconnected heating grid. Of the fourteen installed plants only one is gas operated bearing 60.76% of the total installed capacity, while the rest use fuel oil resulting in a high level of CO2 emissions as well as the distribution losses due to a high-temperature district heating and an old distribution system. Other issues are the high thermal energy consumption of roughly 200 kWh/m2 in the residential sector and 190 kWh/m2 on average for public buildings. Reduction of costs and CO2 emissions can be reached with a high penetration of renewable sources and decreasing the energy consumption with better insulation. The aim of this paper is to evaluate the integration of solar energy into the district heating system of the City. There are three proposed scenarios for the use of solar energy in the City: (i) producing hot water for a residential-scale use ; (ii) preheating of a district heating plant ; and (iii) thermal energy storage in a solar plant for a district- scale use. In all aforesaid scenarios, the use of the new hybrid photovoltaic-thermal (PVT) collector has been evaluated. The future of the district heating system is concluded to be formed by the connection of the current fourteen small heating grids and operated by two heating plants, one solar plant and one biomass cogeneration plant. The system has been modeled as a low-temperature district heating system. The potential energy covered by solar is 40.4 GWh for hot water demand and 44 GWh for the district heating system.
| Item Type: | Conference or Workshop Item (Lecture) |
|---|---|
| Keywords (Croatian): | District heating, solar energy, Photovoltaic-thermal collector, seasonal storage, solar water preheating |
| Subjects: | TECHNICAL SCIENCE > Mechanical Engineering |
| Divisions: | 500 Department of Energy, Power Engineering and Environment > 510 Power Engineering and Energy Management Chair |
| Indexed in Web of Science: | No |
| Indexed in Current Contents: | No |
| Date Deposited: | 13 Apr 2016 10:14 |
| Last Modified: | 19 May 2016 15:03 |
| URI: | http://repozitorij.fsb.hr/id/eprint/5559 |
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