Enhancement of Heat Transfer in PCM by Cellular Zn-Al Structure

• Autorzy: Naplocha K. , Koniuszewska A. , Lichota J. , Kaczmar J. W.
• Języki publikacji: EN

Abstrakty

EN

Development of open cellular metal foam technology based on investment casting applying the polyurethane pattern is discussed. Technological process comprises preparing of the ceramic mold applying PUR foam as the pattern, firing of the mold, pouring of the liquid Zn-Al alloy into the mold and washing out of the ceramic material from cellular casting. Critical parameters such as the temperature of mold and poured metal, design of gating system affected by metalostatic pressure allowed to produce castings with cellular structure characterized by the open porosity. Metal cellular foams with the open porosity embedded in phase change material (PCM) enhance heat transfer and reduce time operations in energy storage systems. Charging and discharging were performed at the laboratory accumulator by heating and cooling with flowing water characterized by the temperatures of 97-100ºC. Temperature measurements were collected from 7 different thermocouples located in the accumulator. In relation to the tests with pure paraffin, embedding of the metal Zn-Al cellular foam in paraffin significantly decreases temperature gradients and melting time of paraffin applied as PCM characterized by the low thermal conductivity. Similarly, reduction of discharging time by this method improves the efficiency of thermal energy storage system applied in solar power plants or for the systems of energy efficient buildings.

Słowa kluczowe

EN

innovative foundry technology; innovative foundry material; metal cellular foam; porous Zn-Al structure; investment casting; heat transfer

PL

innowacyjna technologia odlewnicza; innowacyjny materiał odlewniczy; pianka metalowa; struktura porowata Zn-Al; odlewanie precyzyjne; wymiana ciepła

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2016
• Tom: Vol. 16, iss. 4
• Strony: 91--94
• Opis fizyczny: Bibliogr. 11 poz., rys., tab., wykr.

Twórcy

autor

Naplocha K.

• Wrocław University of Science and Technology, Faculty of Mechanical Engineering, Chair of Foundry Engineering, Plastics and Automation, 5 Łukasiewicza St. 50-371 Wrocław

autor

Koniuszewska A.

• Wrocław University of Science and Technology, Faculty of Mechanical Engineering, Chair of Foundry Engineering, Plastics and Automation, 5 Łukasiewicza St. 50-371 Wrocław

autor

Lichota J.

• Wrocław University of Science and Technology, Faculty of Mechanical and Power Engineering, Department of Mechanics and Energy Systems, 27 Wybrzeże Wyspiańskiego St. 50-370 Wrocław

autor

Kaczmar J. W.

• Wrocław University of Science and Technology, Faculty of Mechanical Engineering, Chair of Foundry Engineering, Plastics and Automation, 5 Łukasiewicza St. 50-371 Wrocław

Bibliografia

• [1] Banhart, J. (2001). Manufacture, Characterization and Application of Cellular Metals and Metal Foams. Progress in Materials Science. 46(6), 559-632.
• [2] Banhart, J. (2006). Metal Foams: Production and Stability. Advanced Engineering Materials. 8(9), 781-794.
• [3] Zhao, C.Y. Zhou, D. & Wu, Z.G. (2011). Heat transfer of phase change materials (PCMs) in porous materials. Frontiers in Energy. 5(2), 174-180.
• [4] Zhao, C.Y., Lu, W. & Tian, Y. (2010). Heat transfer enhancement for thermal energy storage using metal foams embedded within phase change materials (PCMs). Solar Energy. 84, 1402-1412.
• [5] Zhao, C.Y. (2012). Review on thermal transport in high porosity cellular metal foams with open cells. International Journal of Heat and Mass Transfer. 55, 3618-3632.
• [6] Nomura, T., Okinaka, N. & Akiyama, T. (2009). Impregnation of porous material with phase change material for thermal energy storage. Materials Chemistry and Physics. 115(2-3), 846-850.
• [7] Aydin, D., Casey, S.P. & Riffat, S. (2015). The latest advancements on thermochemical heat storage systems. Renewable and Sustainable Energy Reviews. 41, 356-367.
• [8] Nadolski, M. Konopka, Z. Łągiewka, M. & Zyska, A. (2008). Mechanical properties of investment casting moulds reinforced with ceramic fibre. Archives of Foundry Engineering. 8(1), 149-152.
• [9] Cholewa, M., Dziuba, M., Kondracki, M. & Suchoń, J. (2008). Validation Studies of Temperature Distribution and Mould Filling Process for Composite Skeleton Castings. Archives of Foundry Engineering. 8(1), 163-168.
• [10] Trytek, A., Nawrocki, J. & Sarek, D. (2010). Lost wax process – mould properties. Archives of Foundry Engineering. 10(spec.1), 427-430.
• [11] Nadolski, M., Konopka, Z., Łągiewka, M. & Zyska, A. (2008). Examining of slurries and production of moulds by spraying method in lost wax technology. Archives of Foundry Engineering. 8(2), 107-110.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.