Tehno-ekonomska analiza energetske obnove fonda zgrada priključenih na centralizirani toplinski sustav

undergraduate thesis

• Title (english): Techno-economic analysis of energy renovation of the building stock connected to the centralized heating system
• Author: Vid Andrašić
• Mentor: Tomislav Pukšec (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2025-02-25, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; Process Energy Engineering

Abstract

Kroz ovaj rad analiziran je utjecaj energetske obnove fonda zgrada priključenih na centralizirani toplinski sustav na promjene toplinskih potreba i temperaturnih režima samog sustava, s gradom Vukovarom kao studijom slučaja. Na početku dan je pregled literature na temu energetske učinkovitosti zgrada i CTS-a, s fokusom na Hrvatske i EU direktive i strategije. Nakon direktiva slijedi pregled i opis metode korištene u tehno-ekonomskoj analizi. Nadalje slijedi opis studije slučaja grada Vukovara, s analizom fonda stambenih zgrada spojenih na centralizirani toplinski sustav u Vukovaru s osvrtom na njihova energetska svojstva te pregled centraliziranih toplinskih sustava u RH i Vukovaru. U analizi utjecaja energetske obnove, analizirana su dva slučaja. Prvi slučaj analizira samo obnovu vanjske ovojnice zgrade, nadogradnju solarnih toplinskih kolektora na CTS te postepenu zamjenu plinskog kotla sa dizalicama topline. U drugom slučaju dodaju se još i tehnički sustavi u zgradi kako bi se objekti spojeni na CTS-a doveli do nZEB standarda. Dodatno, za svaki slučaj uzimaju se u obzir i različite stope subvencije obnove s ciljem da se prikažu različiti slučajevi isplativosti. Na kraju rada iznose se rezultati tehno-ekonomske analize isplativosti predloženih rješenja.

Abstract (english)

Through this paper, the impact of energy renovation of the building stock connected to the district heating system on changes in heat demand and temperature regimes of the system itself is analysed, with city of Vukovar as a case study. The paper begins with a literature review on the topic of building energy efficiency and district heating systems, focusing on Croatian and EU directives and strategies. Following the directives, the method used in the techno-economic analysis is described. Next the case study of the city of Vukovar is presented, including an analysis of the residential building stock connected to the district heating in Vukovar, with an overview of their energy properties of the buildings and a review of district heating systems in Croatia and Vukovar. In the analysis, two scenarios are examined. The first scenario analyses only the renovation of the building's external shell, the addition of solar thermal collectors to the DH, and the gradual replacement of the gas boiler with heat pumps. In the second scenario, technical systems within the buildings are also upgraded to bring them up to the nZEB (nearly Zero Energy Building) standard. Additionally, for each scenario, different renovation subsidy rates are considered to illustrate various profitability cases. The paper concludes with the results of the techno-economic analysis of the proposed solutions' cost-effectiveness.

• Keywords: Energetska obnova; centralizirani toplinski sustav; Energetska učinkovitost; niskotemperaturni režim; tehno-ekonomska analiza
• Keywords (english): Energy renovation; district heating; energy efficiency; low-temperature regime; techno-economic analysis
• Language: croatian
• URN:NBN: urn:nbn:hr:235:599127
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2025-02-21 10:18:53