Effect of filling ratio on thermal performance and thermal parameters of closed loop pulsating heat pipes

• Autorzy: Kolková Z. , Malcho M.
• Języki publikacji: EN

Abstrakty

EN

Improving the performance of electrical components needs higher heat removal from these systems. One of the solutions available is to use a sealed heat pipe with a throbbing filling, where development meets the current requirements for intensification of heat removal and elimination of moving parts cooling systems. Heat pipes operate using phase change working fluid, and it is evaporation and condensation. They have a meandering shape and are characterized by high intensity of heat transfer, high durability and reliability. Advantage of these tubes is that it is not necessary to create the internal capillary structure for transporting liquid and they need no pump to the working fluid circulation. They have a simple structure, low cost, high performance, and they can be used for various structural applications. The choice of working fluid volume and performance affects thermal performance. Distilled water, ethanol and acetone were used in the performance ranges of 0-80%.

Słowa kluczowe

EN

closed loop pulsating heat pipe; thermal performance; evaporation; condensation; filling ratio; thermal resistance; temperature

• Wydawca: Wydawnictwo Politechniki Świętokrzyskiej
• Czasopismo: Structure and Environment
• Rocznik: 2013
• Tom: Vol. 5, no. 4
• Strony: 37--40
• Opis fizyczny: Bibliogr. 9 poz., fot., rys., wykr., wzory

Twórcy

autor

Kolková Z.

• University of Žilina, Slovakia

autor

Malcho M.

• University of Žilina, Slovakia

Bibliografia

• [1] Akachi H.: Structure of a Heat Pipe, US Patent, No 4,921,041, 1990.
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• [3] Groll, Khandekar: Roadmap to Realistic Modeling of Closed Loop Pulsating Heat Pipes. In 9th International Heat Pipe Symposium. Kuala Lumpur, Malaysia.
• [4] Jandačka J., Nosek R., Holubčík M.: Analýza vplyvu množstva spaľovacieho vzduchu na emisné a výkonové parametre zdrojov tepla, Vykurovanie 2012, ročník 20, pp. 99-104.
• [5] Reay D., Kew P,: Heat Pipes Theory, Design and Applications. UK: Fifth Edition, 2006.
• [6] Nemec P., Čaja, Lenhard: Influence working position of heat pipe on their thermal performance, Experimental fluid mechanics, 2010, pp. 435-438.
• [7] Zhang, Faghri: Advances and Unsolved Issues in Pulsating Heat Pipes, In Heat Transfer Engineering, 2008, Vol. 29, pp. 20-44.
• [8] Orman Ł.J.: Possibility of the application of microstructures in heating and ventilation systems, Structure and Environment, No 1, Vol. 2, 2010. pp. 41-45.
• [9] Orzechowski T., Orman Ł.J.: Boiling heat transfer on surfaces covered with copper fibrous microstructures, Proc of XI Int. Symposium „Heat Transfer and Renewable Sources of Energy”, Szczecin, Poland, 2006, pp. 613-619.

Uwagi

EN

The research is supported by European regional development fund and Slovak state budget by the projekt Research centre of Univerzity of Žilina, ITMS 26220220183.