Utjecaj klimatskih promjena na potrošnju energije u zgradama

undergraduate thesis

• Title (english): The effect of climate change on building's energy consumption
• Author: Lucija Hajsok
• Mentor: Tea Žakula (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2021-02-25, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; Process Energy Engineering

Abstract

U radu je analiziran utjecaj klimatskih promjena na potrebnu i isporučenu energiju za grijanje i hlađenje za tipičan kat zgrade Tehničke škole Ruđer Bošković u Zagrebu. Simulacija potrebne energije za grijanje i hlađenje za svaki sat u godini provedena je za tipičnu meteorološku godinu i 2019. godinu korištenjem računalnog programa TRNSYS. U radu je pretpostavljeno da je izvor toplinske i rashladne energije dizalica topline zrak-voda. Sustav predaje i razvoda nije bio predmet analize ovog rada. Na temelju podataka proizvođača dizalice topline u računalnom programu MATLAB napravljen je algoritam koji omogućuje izračun potrošnje električne energije za svaki sat u godini, a na temelju promjenjivih vrijednosti faktora grijanja (COP) i faktora hlađenja (EER). Oba faktora ovise o vanjskoj temperaturi, djelomičnom opterećenju te temperaturi polaza vode.
Usporedbom meteoroloških podataka pokazano je kako su vanjske temperature za 2019. godinu pretežno više tijekom cijele godine u odnosu na temperature za tipičnu meteorološku godinu, što izravno utječe na potrebnu, odnosno isporučenu energiju. Rezultati simulacije pokazuju da kod energije za hlađenje nema značajne razlike između 2019. i tipične godine, dok za grijanje postoje značajnije razlike. Za tipičnu meteorološku godinu ukupna isporučena energija za grijanje iznosi 6949 kWh, dok za 2019. godinu iznosi 4826 kWh. Za hlađenje vrijednost isporučene energije za tipičnu godinu iznosi 2651 kWh, a za 2019. godinu 3096 kWh.

Abstract (english)

The effect of the climate change on heating and cooling energy needs and the delivered energy is analyzed for a typical floor of the Technical school Ruđer Bošković in Zagreb. The heating and cooling needs have been calculated for every hour in a year using the data for a typical meteorological year 2019. Energy simulations have been carried out using the computer program TRNSYS. It has been assumed that an air-water heat pump is a heating and cooling source of energy. The modeling of heating and cooling emitters in rooms and a distribution system were not within the scope of the analysis. Heat pump electricity consumption has been calculated using heat pump manufactures data and the algorithm developed in the MATLAB software. It enables the calculation of the electricity consumption for every hour in the year based on a variable coefficient of performance (COP) and an energy efficiency ratio (EER). The COP and EER depend on the outdoor air temperature, part-load ratio and supply water temperature.
According to meteorological data, the outdoor air temperatures are predominantly higher during 2019, compared to the typical meteorological year. This has a direct impact on heating and cooling needs, as well as on the delivered energy. The simulation results indicate that there is no significant variation between year 2019 and typical year, regarding the energy for cooling. On the other hand, there are noticeable differences in the energy for heating. The delivered energy for heating is 6949 kWh for a typical meteorological year and 4826 kWh for year 2019. In addition, the delivered energy for cooling is 2651 kWh for a typical meteorological year and 3096 kWh for year 2019.

• Keywords: potrošnja energije; utjecaj klimatskih promjena; računalne simulacije
• Keywords (english): energy consumption; the effect of climate change; computer simulation
• Language: croatian
• URN:NBN: urn:nbn:hr:235:074071
• 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: 2021-02-23 14:28:54