engleski

Trigeneration system for the University campus of Rijeka

By the Decision of the Government of the Republic of Croatia (of December 2003), the territory of the former Trsat Army Barracks in Rijeka was awarded to the Town of Rijeka to be used expressly for the needs of healthcare and higher education. In the Detailed Plan of Urban Development (DPUD) for the area of the Sušak Clinical Hospital Centre and the future University Campus Trsat, the thermo-technical and thermal energy systems for the intended usage of this area are separated and prejudged in the levels of engineering solutions. This detailed defining of the thermo-technical and thermal power infrastructure, without a preliminary justification study for the construction of two separate power systems, was shown to be a wrong solution as early as the design stage of the building projects of Phase One of construction of the University Campus. To no useful purpose, the plan foresees two autonomous systems – the hospital system at the cogeneration/trigeneration level, and the system for the Campus area at the conventional warm water/hot water heating plant. The fact that these systems are located in close proximity of each other further brings into doubt the solution proposed and adopted by the plan. That the power and thermo-technical systems were needlessly and erroneously defined became obvious during the elaboration of the first building projects and infrastructure projects for the University Campus. The new structures to be built in the first construction phase of the campus will have air-conditioning systems. The housing section of the student complex is designed for year-round use, as the complex will be used during the summer months to accommodate visiting professors, students, participants in summer sports activities and others (use as a hostel) This paper presents the results of a preliminary study justifying the application of a joint complex municipal thermal power system powered by natural gas for the areas the DPUD covers. The combined thermal power system will serve for heating, steam production, cooling and electrical energy production, primarily for the DPUD area. There is a possibility of increasing the power-producing capacity of this combined system for the needs of town consumers, which would make the system more efficient. An analysis has been made based on the guidelines for the thermo-technical and thermal power system adopted by the DPUD, the actual state of the distance heating system, and the need for heating, cooling and electrical energy within and outside the zone covered by the plan. Results point to the need to combine the two systems in order to reach an improved technical solution. The solution proposed will help to increase the efficient use of natural gas, the primary energy source, while reducing operating costs and abating environmental pollution.

urban planning; municipal infrastructure; thermal power system; heating; cooling; natural gas; cogeneration; trigeneration; heating plant/thermal power plant

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