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Vapordynamic thermosyphon – heat transfer two-phase device for wide applications

Vasiliev L., Vasiliev L., Zhuravlyov A., Shapovalov A., Rodin A.

Archives of Thermodynamics

2015

Vol. 36, no. 4

65--76

Vapordynamic thermosyphon (VDT) is an efficient heat transfer device. The two-phase flow generation and dynamic interaction between the liquid slugs and vapor bubbles in the annular minichannel of the VDT condenser are the main features of such thermosyphon, which allowed to increase its thermodynamic efficiency. VDT can transfer heat in horizontal position over a long distance. The condenser is nearly isothermal with the length of tens of meters. The VDT evaporators may have different forms. Some practical applications of VDT are considered.

Vaporization heat transfer in porous wicks of evaporators

Vasiliev L., Zhuravlyou A., Shapovalov A., Litvinenko V.

Archives of Thermodynamics

2004

Vol. 25, no. 3

47-59

The experimental investigation of two-phase heat transfer in porous cylindrical element of the evaporator typical for heat transfer enhancement and its cooling efficiency. Propane was chosen as working fluid. The data obtained for a flooded and partially flooded horizontal tube with a sintered capillary-porous coating are analyzed to compare with the data of heat transfer for the tube disposed between two vertical plates with side mini-gaps and inside the coaxial tube with low gap (near 2 mm).