Badania przejmowania ciepła podczas wrzenia na pęku rur ogrzewanych elektrycznie

• Autorzy: Krasowski K. , Cieśliński J. T.

Warianty tytułu

EN

Investigation of boiling heat transfer in an electrically heated tube bundle

• Języki publikacji: EN

Abstrakty

EN

The paper presents the results of experimental research on water, methanol and R141b refrigerant boiling in a horizontal bundle of smooth tubes supposed to represent part of a flooded evaporator. Experiments were carried out for a bundle of 19 tubes in triangular layout for two spacing-to-diameter ratio values -1.7 and 2.0 - in atmospheric and subatmospheric pressure conditions. Heat transfer coefficient values - both local, tube-specific, and general, for the entire bundle - were determined. The boiling process at the bundle was visualized with a CCD camera and laser sheet technique. A correlation equation allowing the calculation of the average heat transfer coefficient for boiling in smooth tube bundles has been proposed.

Słowa kluczowe

EN

heat transfer; experimental test

PL

wymiana ciepła; badania eksperymentalne

• Wydawca: ENERGA SA
• Czasopismo: Acta Energetica
• Rocznik: 2010
• Tom: nr 3
• Strony: 31--40
• Opis fizyczny: Bibliogr. 9 poz., il.

Twórcy

autor

Krasowski K.

autor

Cieśliński J. T.

• ENERGIA Kogeneracja sp. z o.o., Elbląg

Bibliografia

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• 3. Qiu Y.H., Liu Z.H.: Boiling heat transfer of water on smooth tubes in a compact staggered tube bundle. Applied Thermal Engineering, vol. 24, p. 1431-1441, 2004.
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• 5. Kumar S., Mohanty B., Gupta S.C., Boiling heat transfer from vertical row of horizontal tubes. Int. Journal of Heat and Mass Transfer, vol. 45, p. 3857-3864, 2002.
• 6. Leong L.S., Cornwell K., Heat transfer coefficients in a reboiler tube bundle. The Chemical Engineer, 343, p. 219-221, 1979.
• 7. Gupta A., Enhancement of boiling heat transfer in a 3x5 tube bundle. Int. Journal of Heat and Mass Transfer, vol. 48, p. 3763-3772, 2005.
• 8. Webb R.L., Choi K.D., Apparao T.R., A theoretical model for prediction of the heat load in flooded refrigerant evaporator. ASHRAE Trans., vol. 95, Pt. 1, 326-338,1989.
• 9. Krasowski K., Przejmowanie ciepła przy wrzeniu na poziomym pęku rur z powłoką. porowatą.. PhD thesis, Faculty of Mechanical Engineering, Gdansk University of Technology, 2009.