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Tomasz Szmechtyk, Natalia Sienkiewicz, Katarzyna Koter, Agnieszka Kobierska and Krzysztof Strzelec

). Fibres, films, plastics and rubbers: a handbook of common polymers. Elsevier. 24. Lee, J., Kim, J., Kim, H., Bae, Y.M., Lee, K.H. & Cho, H.J. (2013). Effect of thermal treatment on the chemical resistance of polydimethylsiloxane for microfluidic devices. J. Micromech. Microengin. 23(3), 035007. DOI: 10.1088/0960-1317/23/3/035007. 25. Holland, B.J. & Hay, J.N. (2002). The thermal degradation of PET and analogous polyesters measured by thermal analysis–Fourier transform infrared spectroscopy. Polymer 43(6), 1835–1847. DOI: 10.1016/S0032

Open access

Wojciech Budzianowski

References Budzianowski W. M., Miller R.: Towards improvements in thermal efficiency and reduced harmful emissions of combustion processes by using recirculation of heat and mass: A review. Recent Patents on Mechanical Engineering 2 (2009), 228-239. Cho J. H., Lin C. S., Richards C. D., Richards R. F., Ahn J., Ronney P. D.: Demonstration of an external combustion micro-heat engine. Proceeding of the Combustion Institute 32 (2009), 3099-3105. Budzianowski W. M., Miller r

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Lech Murawski and Marek Szmyt

Stiffness characteristics and thermal deformations of the frame of high power marine engine

In the subject-matter literature detail data on stiffness of the crankshaft foundation connected with the frame of marine main engine are still lacking. Thermal deformation models of the engine's casing, proposed by engine producers, are excessively simplified. However the parameters are crucial for the shaft-line alignment analysis as well as for the analysis of interactions between the shaft-line and engine crankshaft, especially in the case of high power engines. This paper presents a determination method of the marine engine body characteristics as well as results of example computations performed for a Sulzer 7 RTA 84 C engine installed on a ~3000 TEU container ship. It has been demonstrated that the producer's assumption about parallel displacement of the crankshaft axis in thermal working conditions is too rough. The thermal deformation of the engine is of hogging character, which results in significant change of the moment load exerted on the crankshaft and shaft line. The stiffness parameters recommended by the producers for the shaft-line alignment are estimated correctly, however they represent only engine's body flexibility, without taking into account ship's hull flexibility.

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J. Ekmanis, V. Zebergs, N. Zeltins and V. Vrublevski

Thermal Characteristics of New Building Materials and their Effect upon the Energy Efficiency

The paper formulates the role of thermal inertia of the building materials in the energy supply of buildings and in solution of the energy efficiency problems. The evolution of construction entails the application of new building materials as well as of glazed surfaces in the envelopes of buildings. An analysis is made of the influence of the thermal resistance of building materials and their heat capacity on the thermal inertia indicators of buildings. An inertia scale of buildings has been developed for the choice of the heat supply capacities of buildings at low outdoor temperatures under extreme conditions of the Latvian climate. The ratio of the ventilation capacities has been analysed in the total heating balance at a low thermal inertia of buildings. The significance of innovative ventilation technologies for raising the energy efficiency has been considered.

Open access

Zamir Ahmed Abro, Nanliang Chen, Zhang Yifan, Hong Cheng-Yu, Abdul Malik Rehan Abassi, Altaf Ahmed Simair, Rafique Ahmed and Azmat Hussain

References [1] Prakash, C., G. Ramakrishnan, and C. Koushik, Effect of blend ratio on the quality characteristics of bamboo/cotton blended ring spun yarn. Fibres & Textiles in Eastern Europe, 2011. 19(6): p. 38-40. [2] Özdil, N., A. Marmaralı, and S.D. Kretzschmar, Effect of yarn properties on thermal comfort of knitted fabrics. International journal of Thermal sciences, 2007. 46(12): p. 1318-1322. [3] Islam, N., Environmental issues in Bangladesh: an overview. Pakistan journal of social sciences, 2005. 3(4): p. 671-679. [4] Qureshi, A

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Tadeusz Bohdal, Katarzyna Widomska and Małgorzata Sikora

of heat transfer investigations during phase change of refrigerants in minichannels. Chłodnictwo 12(2012), 18-21 (in Polish). [13] Charun H.: Thermal and flow characteristics of the condensation of R404A refrigerant in pipe minichannels. Int. J. Heat and Mass Trans. 55(2012), 2692-2701. [14] Chen J.Y., Yang K.S., Chang Y.J., Wang C.C.: Two - phase pressure drop of air - water and R410A in small horizontal tubes. Int. J. Multiphase Flow 27(2001), 1293- 1299. [15] Doerr T.M., Pate M.B.: In-tube condensation heat

Open access

Maria Stopa-Boryczka

Open access

Mária Kurčová

. (Thermal management in industry. The cheapest energy is saved energy) ČSTZ, Prague, ISBN 978-80-86028-41-5. STN EN 12 831 (2004) Vykurovacie systémy v budovách. Metóda výpočtu projektovaného tepelného príkonu. (Heating systems in buildings. Method for calculation of the design heat load). STN 73 0540 (1964) Tepelně technické vlastnosti stavebních konstrukcí a budov. Názvosloví. Požadavky a kritéria. (Thermal insulation characteristics of building constructions and buildings. Terminology. Requirements and criteria). STN 73 0540-2 (2012) Tepelná

Open access

František Dzianik, Štefan Gužela and Eva1 Puškášová

, M. H. Al-Dahhan. Effect of helium pressure on natural convection heat transfer in a prismatic dual-channel circulation loop. International Journal of Thermal Sciences, 2018 (124), 162 - 173 [4] B. Knížat, P. Hlbočan, M. Mlkvik. CFD simulation of a natural circulation helium loop. In Scientific Proceedings Faculty of Mechanical Engineering STU in Bratislava, Nakladateľstvo STU, Bratislava, 2015, 57 - 62 [5] F. Urban, et al. Modelovanie prirodzenej cirkulácie hélia v experimentálnej héliovej slučke. Výskumná správa projektu Výskumné