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3rd Thermal and Fluids Engineering Conference (TFEC)

ISSN: 2379-1748

FALLING-FILM THERMOSYPHONS FOR POWER-PLANT APPLICATIONS: MODELING AND LAB-SCALE EXPERIMENT

Tao He
Department of Mechanical Engineering Stony Brook University, Stony Brook, NY 11794, USA

Wei Zhong
Department of Mechanical Engineering Stony Brook University, Stony Brook, NY 11794, USA

Sean Hardick
Stony Brook University, Stony Brook, NY 11794, U.S.A

Rebecca Trojanowski
Brookhaven National Laboratory, Upton, NY 11973, USA

Tom Butcher
Brookhaven National Laboratory, Upton, NY 11973, U.S.A.

Timothy Wagner
United Technology Research Center, East Hartford, CT 06108, USA

Yaroslav Chudnovsky
Gas Technology Institute, 1700 South Mount Prospect Road, Des Plaines, Illinois 60018, USA

William Worek
Stony Brook University, Stony Brook, NY 11794, USA; Texas A&M University-Kingsville, TX 78363, USA

Jon P. Longtin
Department of Mechanical Engineering, Stony Brook University, NY, USA; Center for Accelerator Science and Education, Stony Brook University, NY, USA

DOI: 10.1615/TFEC2018.env.021766
pages 801-809


KEY WORDS: thermosyphons, natural gas combined-cycle (NGCC) power plant, two phase-change heat transfer, condensation, water harvesting

Abstract

This study presents the concept of the falling-film thermosyphon heat exchanger for harvesting the water vapor present in the flue gas of a natural gas combined-cycle (NGCC) power plant. Water vapor is condensed on the outer shell of the polymer tubes in the evaporator section of the thermosyphon, cooled by the evaporation of the falling film inside the tubes. Liquid water is actively pumped to the top of the evaporator to exchange heat in axial co-flow with the flue gas outside the tubes. A lab-scale thermosyphon system has been built to run the condensation test to validate this concept. The heat and mass transfer was analytically modeled by ε-NTU method. This paper shows the results and compares the model to the experiment.

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