Merilna proga za merjenje kritične gostote toplotnega toka pri mehurčkastem vrenju FC-72

Černač, Nejc (author), Golobič, Iztok (mentor)

V okviru diplomskega dela smo izdelali merilno progo za merjenje kritične gostote toplotnega toka pri mehurčkastem vrenju dielektričnega fluida FC-72. Kritično gostoto toplotnega toka smo merili na kovinskem horizontalno ležečem in vertikalno orientiranem grelnem traku. Analiziran je bil vpliv različno obdelanih grelnih površin na kritično gostoto toplotnega toka. Na obdelanih površinah smo izvedeli tudi meritve kota omočenja in hitrosti omočenja. Kritična gostota toplotnega toka pri vrenju FC-72 je bila v območju od 114,1 do 196,9 kW/m2, koti omočenja so bili v območju od 60,0 do 75,1 ° ter hitrost omočenja je bila v območju od 0,45 do 0,62 mm/s.

• Language: Slovenian
• Keywords: Mehurčkasto vrenje, kritična gostota toplotnega toka, merilna proga, FC-72, kot omočenja.
• Work type: Bachelor thesis/paper
• Organization: FS - Faculty of Mechanical Engineering
• Year: 2017
• PID: 20.500.12556/RUL-95459
• Publication date in RUL: 20.09.2017

Secondary language

• Language: English
• Title: Experimental setup for measuring critical heat flux in nucleate boiling of FC-72

Abstract

Experimental setup for measuring critical heat flux in nucleate boiling of dieletric fluid FC-72 was made. Critical heat flux was measured on metal ribbon heater, which was positioned horisontaly and oriented verticaly. Different processed heated surfaces were analized on critical heat flux. Measurements of wettability on processed surfaces were made for contact angle and speed of wettability. Critical heat flux in nucleate boiling of FC-72 was measured between 114,1 and 196,9 kW/m2, contact angle was between 60,0 and 75,1 °, speed of wettability was between 0,45 and 0,62 mm/s.

• Keywords: Nucleate boiling, critical heat flux, experimental setup, FC-72, contact angle.