Usporedba rada rashladnog agregata s vodom i zrakom hlađenim kondenzatorom

undergraduate thesis

• Title (english): Comparative analysis of chiller operating with air- and water-cooled condenser
• Author: Franko Orešković
• Mentor: Vladimir Soldo (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2024-02-29, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; Process Energy Engineering

Abstract

Tema završnog rada je usporedba rada rashladnog agregata s vodom i zrakom hlađenim kondenzatorom poslovne zgrade na području grada Zagreba. Nazivni rashladni učinak rashladnika vode iznosi 1 MW. Rashladno postrojenje koristi se za hlađenje vode u temperaturnom režimu 12/7 °C. Radna tvar je propan R290.
S konstantnim rastom cijena energenata, zahtjev za energetsko učinkovitim sustavima je sve veći. Osim uporabe frekventnih pretvarača za regulaciju kompresora, pumpi i ventilatora, odabir adekvatnog načina hlađenja kondenzatora u sustavima s rashladnicima kapljevine predstavlja krucijalan segment u energetskoj učinkovitosti cjelokupnog sustava. Odabir jednog sustava nad drugim nije toliko jednostavno koliko se čini; pogon ventilatora, kompresora i održavanje sustava samo su neke od komponenata koje se moraju uzeti u obzir pri odabiru principa hlađenja. U ovome radu provest će se detaljna termotehnička analiza koja će dati odgovor na pitanje koji način hlađenja kondenzatora je optimalan za zadani sustav i kolike su uštede odabirom jednog sustava nad drugim.

Abstract (english)

The topic of the final paper is comparative analysis of chiller operating with air- and water-cooled condenser of an office building in the area of the city of Zagreb. The nominal cooling
effect of the evaporator is 1 MW, through which water passes, at a temperature regime of 12/7
°C, cooled by the working substance R290. With the constant rise in energy prices, the demand
for energy efficient systems is increasing. In addition to the use of frequency converters for the
regulation of pumps and fans, the selection of an adequate method of cooling the condenser in
systems with chillers represents a crucial segment in the energy efficiency of the entire system.
Choosing one system over another is not as simple as it seems; fan drive, compressor and
system maintenance are just few of the components that must be taken into account when
choosing a specific cooling system of chillers. In this paper, a detailed thermotechnical analysis
will be carried out, which will answer the question of which method of cooling the condenser
is optimal for the given system and how much savings there are by choosing one system over
another.

• Keywords: rashladnik kapljevine; vodom hlađeni kondenzator; zrakom hlađeni kondenzator; tehnoekonomska analiza dvaju sustava
• Keywords (english): chillers; condenser
• Language: croatian
• URN:NBN: urn:nbn:hr:235:246760
• 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: Embargoed access; Embargo expiration date: 2026-03-02
• Created on: 2024-03-01 11:54:00