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Design and Evaluation of Compact Heat Exchangers for Hybrid Fuel Cell and Gas Turbine Systems: Author: Lindstrom, Joel David; Date: 2005-05-15; Program: Mechanical Engineering; Abstract: Hybridized Carbonate and Solid Oxide fuel cell power plants are currently under investigation to fulfill demands for high efficiency and low emissions. Selection and design of high performance heat exchangers are essential for such applications. In this work, various compact heat exchanger (CHEX) technologies pertinent to gas-gas recuperative duties are presented. The CHEX types considered include brazed plate-fin, fin-tube, microchannel, primary surface and spiral. Based on a comparative rating procedure, two CHEX designs namely, plate-fin and microchannel were chosen for further review. Plai...; Download File | View full details

A Numerical Investigation of Thermal-Hydraulic Characteristics in Three Dimensional Plate and Wavy Fin-Tube Heat Exchangers for Laminar and Transitional Flow Regimes: Author: Panse, Satchit Pradip; Date: 2005-08-15; Program: Mechanical Engineering; Abstract: The plate fin-and-tube heat exchangers are used in wide variety of industrial applications, particularly in the heating, air-conditioning and refrigeration industries. In most cases the working fluid is liquid on the tube side exchanging heat with a gas, usually air. The current study is focused on two fin configurations, the plain plate-fin and the wavy-fin. These two fin configurations are numerically investigated in both staggered and in-lined tube layouts. The present investigation ranges from laminar flow regime into the sub-critical or transitional flow regime. The suitability of the edd...; Download File | View full details