Numerical Analysis of Convective Heat Transfer for Selected Geometric System

• Autorzy: Orłowska Magdalena

Identyfikatory

DOI

10.54740/ros.2022.012

• Języki publikacji: EN

Abstrakty

EN

The contemporary problems and issues of environmental protection refer to a large extent to problems related – generally speaking – to energy. Currently, the production processes mainly concern the combustion of energy fuels, transport – over long distances, and their use for utility purposes, e.g. engine drive or heating. These processes significantly negatively impact the environment and are magnified by their enormous intensity and size. While energy production and transport processes have been studied for many years, and their results are widely published, the issues related to the application and operation of heating devices are little known and require much observation and research. The operating indicators of heating devices are generally characterized by low values (natural convection), and their artificial increase (intensity) cannot be used due to the acoustic effects and additional (significant) investment costs. The article presents some research results on the intensification of heat flow – i.e. the thermal efficiency of flat heaters placed in a room with a specific temperature. Physical phenomena were investigated numerically by shaping the heat exchange space. The tested systems concerned a room with a free-standing heater, a heater with a vertical panel mounted in parallel, and a system with a curved bottom plate forming the so-called de Laval nozzle. Interesting results of air velocity and temperature fields and values of the heat transfer coefficient along the height of the heater were obtained. Based on the presented research, it can be concluded that the creation of convection surfaces around the heater is advisable because it affects the intensity of heat exchange, which can be increased without energy-intensive energy expenditure, i.e. in a non-mechanical way. Undoubtedly contributes positively to investment and operating costs, which is essential in environmental protection issues.

Słowa kluczowe

EN

convection; intensification; protect; environment

• Wydawca: Politechnika Koszalińska
• Czasopismo: Rocznik Ochrona Środowiska
• Rocznik: 2022
• Tom: Tom 24
• Strony: 163--171
• Opis fizyczny: Bibliogr. 12 poz., rys.

Twórcy

autor

Orłowska Magdalena

• Koszalin University of Technology, Poland

• https://orcid.org/0000-0002-2072-1791

Bibliografia

• Czapp, S., Czapp, M., Orłowska, M. (2016). Numerical and Experimental Investigation of Thermal Convection near Electric Devices with Vertical Channels, Proceedings of the International Conference on Information and Digital Technologies (IDT). 54-58.
• Lahmer, K., Bessaďh, R. (2014). Numerical simulation of cooling electronic components mounted in a vertical wall by natural convection. Mechanics & Industry, 15, 89-98.
• Tăcutu, L., Năstase, I., Bode, F., Verona Croitoru, C., Dogeanu, A., Sandu, M. (2019). Experimental and numerical investigation on the convective thermal plume around the head of the standing and lying human body, E3S Web of Conferences, 85, Article Nr 02016.
• Orłowska, M. (2018). Study of the Influence of Window Thermal Properties on Radiator Work in the Room – Numerical Research. Rocznik Ochrona Środowiska, 20(2), 1699-1709.
• Orłowska, M., Szkarowski, A., Mamedov, S. (2019). Numerical Analysis of Influence of the Angel of Inclination of the Screen on the Intensity of Heat Exchange from a Flat Heat Exchanger in a Partially Limited Space. Rocznik Ochrona Środowiska, 21(1), 728-737.
• Orłowska, M. (2017). Numerical analysis of the heat exchanger energy efficiency depending on location from the floor. E3S Web of Conferences, 17, Article Nr 00068.
• Orłowska, M. (2018). Numerical analysis of a heat exchanger with differentiated temperatures surface at varying distances from the wall. E3S Web of Conferences, 30, Article Nr 03006.
• Pukhkal, V., Bulgakov, V. (2017). Generation of natural convective air flows in rooms with the use of in-floor convectors with natural circulation. Architecture and Engineering, 2(4), 42-47.
• Pukhkal, V. (2016). Studies of application conditions of in-floor convectors with natural air circulation in water heating systems. Architecture and Engineering, 1(2), 49-52.
• Purusothaman, A., Murugesan, K., Chamkha, Ali J. (2019). 3D modeling of natural convective heat transfer from a varying rectangular heat generating source. Journal of Thermal Analysis and Calorimetry, 138(1), 597-608.
• Staniszewski, B. (1978). Termodynamika. PWN, Warszawa, Poland.
• Wiśniewski, S., Wiśniewski, T. (2017). Wymiana Ciepła. PWN, Warszawa, Poland.

Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).