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Proceedings of Symposium on Energy Engineering in the 21<sup>st</sup> Century (SEE2000) Volume I-IV

ISSN:
1-56700-132-7 (Print)

FEASIBILITY STUDY OF NEW HEAT TRANSPORTATION SYSTEM WITH DRAG-REDUCING SURFACTANT ADDITIVES

Pei-Wen Li
Department of Mechanical Engineering, Kyoto University Kyoto 606-8501, Japan

Yasuo Kawaguchi
Turbomachinery Research Group, Institute for Energy Utilization, National Institute of Advanced Industrial Science and Technology, 1-2 Namiki, Tsukuba, Ibaraki 305-8564, Japan

Akira Yabe
Mechanical Engineering Laboratory, Ministry of International Trade and Industry, 1-2 Namiki, Tsukuba, Ibaraki 305 Japan

Abstract

Utilizing drag-reducing fluid -water added with surfactant, the pumping power in thermal energy transportation can be reduced significantly. When surfactant is added to a installed system that uses water, the increased flow rate and deterioration of heat transfer can result in a drop in the temperature level and total heat to users. At the same time, the pump system must be modified due to the lowered pumping power. A simulation was conducted to predict the exergy and energy transportation efficiency. The minimum heat transfer reduction in order to maintain high exergy efficiency was discussed through the prediction.