The Effect of Structure on Thermal Power of Cast-iron Heat Exchangers

• Autorzy: Mróz M. , Orłowicz A. W. , Tupaj M. , Jacek-Burek M. , Radoń M. , Kawiński M.

Identyfikatory

DOI

10.24425/afe.2020.131278

• Języki publikacji: EN

Abstrakty

EN

The objective of the study reported in this paper was to determine the effect of structure on thermal power of cast-iron heat exchangers which in this case were furnace chambers constituting the main component of household fireplace-based heating systems and known commonly as fireplace inserts. For the purpose of relevant tests, plate-shaped castings were prepared of gray iron with flake graphite in pearlitic matrix (the material used to date typically for fireplace inserts) as well as similar castings of gray cast iron with vermicular graphite in pearlitic, ferritic-pearlitic, and ferritic matrix. For all the cast iron variants of different structures (graphite precipitate shapes and matrix type), calorimetric measurements were carried out consisting in determining the heat power which is quantity representing the rate of heat transfer to the ambient environment. It has been found that the value of the observed heat power was affected by both the shape of graphite precipitates and the type of alloy matrix. Higher thermal power values characterize plate castings of gray iron with vermicular graphite compared to plates cast of the flake graphite gray iron. In case of plates made of gray cast iron with vermicular graphite, the highest values of thermal power were observed for castings made of iron with ferritic matrix.

Słowa kluczowe

EN

heat exchanger; gray cast iron; thermal power

PL

wymiennik ciepła; żeliwo szare; ciepło

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2020
• Tom: Vol. 20, iss. 1
• Strony: 27--30
• Opis fizyczny: Bibliogr. 13 poz., rys., tab.

Twórcy

autor

Mróz M.

• Rzeszow University of Technology, Al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland

autor

Orłowicz A. W.

• Rzeszow University of Technology, Al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland

autor

Tupaj M.

• Rzeszow University of Technology, Al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland

autor

Jacek-Burek M.

• Rzeszow University of Technology, Al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland

autor

Radoń M.

• Rzeszow University of Technology, Al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland

autor

Kawiński M.

• Cast Iron Foundry KAW-MET, ul. Krakowska 11, 37-716 Orły, Poland

Bibliografia

• [1] Erlan, O.M. & Elmabrouk, O. (2014). Influence of section thickness on the thermal conductivity of compacted graphite cast iron at elevated temperatures. Int. Journal of Engineering and Innovative Technology. 3(7), 29-33.
• [2] Podrzucki, Cz., Wojtysik, A. (1988). Plastic unalloyed cast iron. Part II. Kraków: AGH.(in Polish).
• [3] Kinal, G. & Paczkowska, M. (2002). The comparison of grey cast irons in the aspects of the possibility of their laser heat treatment. Journal of Research and Applications in Agricultural Engineering. 57(1), 7376.
• [4] Dobrzański, L.A. (2000). A lexicon of materials science. Verlag Dashofer, version 1.03.2000 (in Polish).
• [5] Greig, G. (1996). Modern ingot mould production. 33 I.F.C., Paper No. 12, New Delhi.
• [6] Geade, G. (1982). Gusseisen mit Vermiculargraphit – ein Werkstoff für spezielle Anwendungsgebiete. Gießerei 69. 18, 492-498.
• [7] Lalich, M.J. & Le Presta, S.J. (1978). Use of compacted graphite cast irons. Foundry 106. No. 9, 56-58.
• [8] Okamoto, T., Kagawa, A., Kamei, K. & Matsumoto, H. (1983). Effects of graphite shape on thermal conductivity, electrical resistance, damping capacity and Young’s modulus of cast iron below 500 oC. Journal of Japan Foundrymen’s Society. 55(10), 32-36.
• [9] Monroe, R.W. & Bates, C.E. (1982). Some thermal and mechanical properties of compacted graphite iron. AFS Trans. 90, 615-619.
• [10] Sergeant, G.F. & Evans, E.R. (1978) The production and properties of compacted graphite iron. The British Foundryman. 71(15), 115-124.
• [11] Gidt, W.H., Tallerico, L.N. & Fuerschbach, P.W. (1989). GTA Welding Efficiency: Calorimetric and Temperature Field Measurements. Welding Journal. January, Res Suppl., 28-32.
• [12] Krzyżanowski, M. (1995). Superficial reinforcement of iron alloys with the use of plasma heating. Kraków: AGH. (in Polish).
• [13] Orłowicz, A.W., Mróz, M., Trytek, A., Tupaj, M., Betlej, J. (2012). Polish Patent No. 211283. Warsaw, Polish Patent Office.