Projekt sustava grijanja i hlađenja hotela sustavom VRV

master's thesis

• Title (english): Design of heating and cooling VRV system for a hotel building
• Author: Luka Hajsok
• Mentor: Darko Smoljan (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2019-12-06, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; Process Energy Engineering

Abstract

U radu je analiziran princip rada VRF (engl. variable refrigerant flow) sustava te su uspoređene tri izvedbe na primjeru hotela u Zagrebu. U ovim sustavima više unutarnjih jedinica povezuje se na jednu vanjsku jedinicu te se strujanjem radne tvari u ljevokretnom kružnom procesu omogućava grijanje i hlađenje prostora. Inverterski upravljani kompresori mijenjaju protok radne tvari kroz unutarnje jedinice kako bi se u svakom trenutku zadovoljilo opterećenju prostora. Prije same analize tri različite izvedbe, napravljena je usporedba VRF i multi split sustava, VRF i vodenih sustava te su prikazana njihova ograničenja. Nakon toga su opisani najčešći tipovi VRF sustava kao i razlike između dvocijevnih i trocijevnih. Proračunom toplinskog i rashladnog opterećenja prema normama HRN EN 12831 i VDI 2078 omogućio se odabir unutarnjih jedinica te dimenzioniranje svake od tri izvedbe. Odabrana je i rekuperatorsko – ventilacijska jedinica za prostor restorana te su dimenzionirani kanali ventilacijskog sustava. Nakon toga izvršila se usporedba između tri različita VRF sustava te je odabrana ona najoptimalnija za izvedbu.

Abstract (english)

In this thesis the work of a VRF (variable refrigerant flow) system was analysed and comparison of three variations of VRF systems on a hotel in Zagreb was made. In these systems more indoor units are connected to the outdoor unit and refrigerant's flow produces energy for heating and cooling. Inverter compressors change flow of the refrigerant through the system and indoor units so the heating/cooling load is satisfied in each moment. Before the analysis of the three different types of VRF systems, the VRF, multi split systems and water systems were compared and their limitations were shown. Different types of VRF systems and differences beetween two and three pipe systems were described. Heating and cooling load were calculated according to HRN EN 12831 and VDI 2078 so indoor and outdoor units could be designed. Also, heat reclaim ventilation unit was selected for the restaurant of the hotel and ventilation ducts were designed. In the end, comparison between these three systems was made and the most optimal solution was chosen.

• Keywords: VRF sustav; grijanje; hlađenje; ventilacija
• Keywords (english): VRF; heating; cooling; ventilation
• Language: croatian
• URN:NBN: urn:nbn:hr:235:923075
• 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: Open access
• Created on: 2019-11-28 09:45:45