Experimental investigation and modelling of flow boiling water in vertical narrow channels

• Autorzy: Sobierska, E.
• Języki publikacji: EN

Abstrakty

EN

The pressure drop during flow boiling of water in vertical rectangular microchannels with two different hydraulic diameters of d[h] = 0,27 mm and d[h] = 1,2 mm were investigated experimentally. The experiments were carried out under subcooled fluid-inlet conditions with deionised and degassed water for different mass fluxes and heat fluxes. The measured pressure drops in two-phase fluid flow have been compared with calculated values based on the momentum equation balance as the sum of three components: friction, acceleration and gravity. The Lockhart-Martinelli method to calculate frictional pressure drop have been used.

Słowa kluczowe

PL

przepływ dwufazowy; straty ciśnienia; wąski kanał

EN

narrow channel; pressure drop; two-phase flow

• Czasopismo: Archives of Thermodynamics
• Rocznik: 2006
• Tom: Vol. 27, no. 1
• Strony: 3-12
• Opis fizyczny: Wz., rys., wykr.,Bibliogr. 5 poz.,

Twórcy

autor

Sobierska, E.

• Institut fur Kernenergetik und Energiesysteme (IKE), Pfaffenwaldring 31, 70569 Stuttgart, Germany

Bibliografia

• [1] QU W., MUDAWAR I.: Measurement and prediction of pressure drop in two-phase micro-channel heat sink, Int. J. Heat Mass Transfer, Vol. 46(2003), 2737-2753.
• [2] WEN D.S., KENNING D.B.R.: Two-phase pressure drop of water during flow boiling in a vertical narrow channel, Exp. Therm. & Fluid Sci., Vol. 28(2004), 131-138.
• [3] LEE H. J., LEE S. Y.: Pressure drop correlation of two-phase flow within horizontal rectangular channels with small heights, Int. J. Multiphase Flow, Vol. 27(2001), 783-796.
• [4] SHUAI J., KULENNOVIC R., GROLL M.: Heat transfer and pressure drop for flow boiling of water in narrow vertical rectangular channels, Therm. Sci. & Eng., Vol. 11(2003), 73-81.
• [5] SOBIERSKA E., CHMIEL K., KULENOVIC R., MERTZ R.: Pressure drop of water flow in rectangular microchannels, Int. Conf. Thermophysical Properties and Transfer Processes of Refrigerants, Vicenza, Italy, 2005.