Numerical analysis of a heat transfer in economizer dedicated for 250 KW power solid fuel heating boiler

• Autorzy: Judt W. , Bartoszewicz J.

Identyfikatory

DOI

10.5604/01.3001.0012.2795

• Języki publikacji: EN

Abstrakty

EN

Heating boilers, which are combusting solid fuels, are a very popular heating device in Poland. Heating boilers for solid fuels with nominal power equal to 250-300 kW reach a high level of waste heat. Polish companies produced a significant amount of heating boilers with that level of heating power, which are being exploited all the time in smaller companies and housing associations. A temperature of exhaust gases in the outlet of the heating boiler can be equal to 270-300ºC. It means that it is possible to recover some part of the waste heat. It can be realizable in an external heat exchanger. The article contains a methodology of a heat transfer process calculation for this type of heat exchangers. Estimated waste heat, which can be recovered from this installation, is equal to 25 kW. Additional heat exchanger implementation into a plant can increase an efficiency of solid fuel combustion process for a 10 percent. Construction of a heat exchanger was calculated during analytical calculations. After that, analytical calculations were verified in numerical calculations. Numerical analysis of a heat exchanger model was realized in the ANSYS Fluent environment. During calculations, a shell-and-tube heat exchanger construction was analysed. Authors of the article analysed a real temperature distribution for exhaust gases located on a shell side and for a water, which are located on a tube side of the economizer. Numerical calculations allowed to model conditions of economizer steady state work for a whole volume of this construction.

Słowa kluczowe

EN

heating boiler; heat transfer; economizer; fluent; solid fuel

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2018
• Tom: Vol. 25, No. 2
• Strony: 164--168
• Opis fizyczny: Bibliogr. 5 poz., rys.

Twórcy

autor

Judt W.

• Poznan University of Technology, Chair of Thermal Engineering Piotrowo Street 3, 60-965 Poznan, Poland tel.: [phone], fax: [phone]

autor

Bartoszewicz J.

• Poznan University of Technology, Chair of Thermal Engineering Piotrowo Street 3, 60-965 Poznan, Poland tel.: [phone], fax: [phone]

Bibliografia

• [1] Gogół, W., Wymiana ciepła – tablice i wykresy, Wydawnictwa Politechniki Warszawskiej, Warszawa 1991.
• [2] Lumo Technika Grzewcza, Dane dla projektantów, Stalowe wodne kotły grzewcze Lumo typoszeregu 8-300 kW MarCo, online: http://www.lumo.com.pl/pdf_techniczne/marco.pdf, 2006.
• [3] PN-EN 303-5:2012 Kotły grzewcze – Część 5: Kotły grzewcze na paliwa stałe z ręcznym i automatycznym zasypem paliwa o mocy nominalnej do 500 kW – Terminologia, wymagania, badania i oznakowanie, 2012.
• [4] Staniszewski, B., Wymiana ciepła, podstawy teoretyczne, Państwowe Wydawnictwa Naukowe, Warszawa 1979.
• [5] Wiśniewski, S., Wiśniewski, T., Wymiana ciepła, WNT, Warszawa 2009.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).