Projekt rashladnog sustava supermarketa s ugljik dioksidom kao radnom tvari

master's thesis

• Title (english): Design of a refrigeration system in supermarket with CO2 as refrigerant
• Author: Antonia Peček
• Mentor: Marino Grozdek (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2023-12-06, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; Process Energy Engineering

Abstract

U ovom radu napravljen je cjelokupan projekt izvedbe rashladnog sustava supermarketa s ugljik
dioksidom kao radnom tvari. U uvodu je opisan ugljik dioksid kao radna tvar te vrste rashladnih
procesa sa ugljik dioksidom. Izračunat je potreban toplinski kapacitet za hlađenje prehrambenih
proizvoda u komorama i u vitrinama na primjeru supermarketa na području sjeverozapadne
Hrvatske. Na temelju izračunatog potrebnog toplinskog kapaciteta, dimenzionirane su
komponente rashladnog sustava – isparivača, kompresora i hladnjaka plina. Određen je rashladnih
proces sa dva seta kompresora, jedan set za plus režim te jedan za minus režim. Dimenzioniran je
cjevovod cijelog rashladnog sustava. Odabrane su potrebne komponente sustava – isparivači,
rashladne vitrine, setovi kompresora i hladnjak plina. Cjelokupni rashladni proces je opisan, te su
određene točke procesa. Opisan je rad automatske regulacije. Također je opisana izvedba projekta
po fazama, od početka do kraja te su navedeni sigurnosni zahtjevi radi korištenja ugljik dioksida
kao radne tvari.

Abstract (english)

This thesis presents a thorough project that implements a supermarket cooling system with carbon
dioxide as a refrigerant. Introduction describes carbon dioxide as a refrigerant and types of cooling
processes with carbon dioxide. Cooling capacity needed for cooling food in cold rooms and
refrigerated cabinets is calculated on an example of a supermarket in northwest Croatia. Based on
this calculation, components of a cooling system are dimensioned - evaporator, compressor, and
gas cooler. Cooling process with two sets of compressors is specified, one set of compressors for
the plus regime, one for the minus regime. Pipeline of the whole cooling system is dimensioned.
Necessary system components are chosen - evaporators, refrigerated cabinets, compressor sets,
and gas cooler. Complete cooling process is described and points of the cooling process are
determined. Automatic regulation is described. Likewise, project implementation is described in
phases, from beginning to end, and safety requirements are listed, due to using carbon dioxide as
a refrigerant.

• Keywords: ugljik dioksid; R744; supermarket; rashladni sustav; booster sustav; projekt; hlađenje; rashladne komore; rashladne vitrine
• Keywords (english): carbon dioxide; R744; supermarket; cooling system; booster system; project; cooling; cold rooms; refrigrated cabinets
• Language: croatian
• URN:NBN: urn:nbn:hr:235:620217
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Embargoed access; Embargo expiration date: 2028-12-06
• Created on: 2023-12-07 13:43:42