prikaz prve stranice dokumenta Rashladni tunel za zamrzavanje ribe
  Download
PDF 3.17 MB
master's thesis
Rashladni tunel za zamrzavanje ribe
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2022. urn:nbn:hr:235:781872
Nemanić, Robert
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

Institutional repository: Repository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb

Cite this document

Nemanić, R. (2022). Rashladni tunel za zamrzavanje ribe (Master's thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:781872

Nemanić, Robert. "Rashladni tunel za zamrzavanje ribe." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2022. https://urn.nsk.hr/urn:nbn:hr:235:781872

Nemanić, Robert. "Rashladni tunel za zamrzavanje ribe." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2022. https://urn.nsk.hr/urn:nbn:hr:235:781872

Nemanić, R. (2022). 'Rashladni tunel za zamrzavanje ribe', Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 23 May 2024, https://urn.nsk.hr/urn:nbn:hr:235:781872

Nemanić R. Rashladni tunel za zamrzavanje ribe [Master's thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2022 [cited 2024 May 23] Available at: https://urn.nsk.hr/urn:nbn:hr:235:781872

R. Nemanić, "Rashladni tunel za zamrzavanje ribe", Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:235:781872

Metadata
TitleRashladni tunel za zamrzavanje ribe
Title (english)Freezing tunnel for fish
AuthorRobert Nemanić
MentorVladimir Soldo (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2022-05-13, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Process Energy Engineering
Abstract
U ovome radu projektiran je protočni rashladni tunel za zamrzavanje ribe kapaciteta 3500 kg/h. Postrojenje je kaskadne izvedbe s radnom tvari R744 (CO2) u donjoj kaskadi te s R717 (NH3) u gornjoj kaskadi. Kondenzator gornje kaskade evaporativne je izvedbe, dok je isparivač donje kaskade izveden kao potopljeni isparivač. Rashladni učinak rashladnog tunela iznosi 350 kW, dok temperatura isparavanja iznosi -45 °C. Nadalje, u radu su provedeni termodinamički proračuni potopljenog isparivača i evaporativnog kondenzatora, čime su određene potrebne dimenzije aparata. Za procjenu gubitka vode na evaporativnom kondenzatoru napravljena je analiza gubitka vode za ljetne mjesece. Za određivanje termodinamičke valjanosti kaskadnog rashladnog procesa provedena je eksergijska analiza sustava kojom je utvrđeno da eksergijski stupanj djelovanja sustava iznosi 52,2 %. U radu je također napravljena shema spajanja i automatske regulacije sustava te dispozicijski crtež kaskadnog rashladnog sustava.
Abstract (english)
In this paper, continuous freezing tunnel for fish with a capacity of 3500 kg/h was designed. The plant is designed as cascade refrigeration system with R744 (CO2) in the low temperature cycle and R717 (NH3) in the high temperature cycle. For the heat rejection in the high temperature cycle an evaporative condenser is used, while the evaporator in the low temperature cylce is designed as flooded evaporator. The cooling capacity of the freezing tunnel is 350 kW, while the evaporation temperature is -45 °C. Furthermore, thermodynamic calculations of flooded evaporator and evaporative condenser were performed, which determined the required dimensions of the apparatus. In order to estimate the water loss on the evaporative condenser, an analysis of water loss for the summer months was made. To determine the thermodynamic validity of the cascade refrigeration process, an exergy analysis of the system was performed, which determined that the exergy efficiency of the system is 52.2%. In this paper, process flow diagram with automatic control and the layout drawing of the cascade refrigeration system are also made.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:781872
Study programmeTitle: Mechanical Engineering
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2022-05-11 10:32:52