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HEAT TRANSPORTATION BY AN OSCILLATORY FLOW THROUGH A NEW HEAT TRANSPORTATION PIPE

DOI: 10.1615/IHTC13.p22.230
page 12

Y. Ishii
Chiba University, Chiba, Japan

Z. Pingping
Chiba University, Chiba, Japan

R. Kawai
Chiba University, Chiba, Japan

Mikio Hishida
Chiba University, Chiba; Department of Mechanical Engineering Nagoya Institute of Technology Gokiso-cho, Showa-ku, Nagoya, Japan

G. Tanaka
Chiba University, Chiba, Japan

Abstract

We proposed a new type of heat transportation pipe that is composed of duplex tube and two orifices situated at left and right ends. Sinusoidal reciprocal flow was imposed at the left orifice of the heat transportation pipe. We calculated the variations of velocity and temperature fields and evaluated the flow rate, heat transportation rate, work rate and heat transportation efficiency of the new heat transportation pipe. We compared the heat transportation performance of the present new type heat transportation pipe with two kinds of reference heat transportation pipes, tube bundle type and single round tube type. The main results were (1) the oscillatory flow composed of oscillatory and steady components were induced in the duplex tube, (2) the steady component comprised in the oscillatory flow caused the enhancement of the heat transportation performance, (3) dimensionless flow rate of the steady component, heat transportation rate, work rate and heat transportation efficiency of the oscillatory flow were correlated by Remax, (4) the heat transportation rate of the present heat transportation pipe had the maximum value of about 50 times as much as that of the reference tube bundle type heat transportation pipe, and (5) the heat transportation efficiency reached the maximum value of about 15 times as much as that of the reference single tube type heat transportation pipe.

IHTC-13 Digital Library

Measurement of fluid temperature with an arrangement of three thermocouples FLOW BOILING OF A HIGHLY VISCOUS POLYMER SOLUTION