Eksperimentalna i teorijska analiza prijelaza topline u koaksijalnom kondenzatoru

undergraduate thesis

• Title (english): Experimental and theoretical heat transfer analysis in coaxial condenser
• Author: Matej Tenčić
• Mentor: Vladimir Soldo (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2018-02-28, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering

Abstract

U završnom radu provedena je analiza prijelaza topline u koaksijalnom kondenzatoru. Koaksijalni kondenzator dio je eksperimentalnog rashladnog koji se nalazi u Laboratoriju za toplinu i toplinske uređaje. Kondenzator je koaksijalan i u unutarnjoj cijevi struji voda, a u vanjskoj cijevi i oko unutarnje struji propan. S obzirom na F-gas regulativu, u zadnje vrijeme istraživanja se usmjeravaju na radne tvari s niskim GWP brojem pa su prikazani trendovi, regulative te osnovne karakteristike radnih tvari. Kao prirodna radna tvar propan ima sve važniju ulogu u primjeni . Nakon toga opisuju se kondenzatori. Slijedi opis eksperimentalnog postava koji se koristio za mjerenja. Prikazane su postavke rashladnog procesa i termodinamički proračun i proračun pada tlaka koaksijalnog kondenzatora. U sklopu rada provedena su mjerenja na eksperimentalnom uređaju. U prilogu se nalazi shema spajanja i automatske regulacije i dispozicijski crtež mjernog sustava.

Abstract (english)

This bachelor's degree thesis analyses condensation heat transfer in helicaly coiled concentric tube-in- tube heat exchanger.This condenser is part of the experimental rig which is placed in Heat and heat devices laboratory. Condenser is coaxial with water flow in inner tube and with the propane flow in the annulus. Following the F-gas legislation, in the last few years research strives towards low GWP refrigerants, so legislations, main refrigerant properties and trends are shown. As a natural refrigerant, propane has an important role in refrigeration applications. After that, properties of condensers and description of experimental rig are given. Refrigeration cycle has been calculated, with thermodynamic calculation of condenser. In the capacity of this thesis, tests were made with the experimental rig. In the end there is a regulation scheme and three dimensional display of the experimental rig.

• Keywords: coaxial condenser; thermodynamic calculation of condenser; propane; GWP; experimental results
• Keywords (english): koaksijalni kondenzator; termodinamički proračun kondenzatora; propan; GWP; eksperimentalni rezultati
• Language: croatian
• URN:NBN: urn:nbn:hr:235:976484
• 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: 2019-05-22 22:07:37