Two-Phase Flow Heat Exchangers

Two-phase flow heat exchangers are vital components of systems for power generation, chemical processing, and thermal environment control. The art and science of the design of such heat exchangers have advanced considerably in recent years. This is due to better understanding of the fundamentals of two-phase flow and heat transfer in simple geometries, greater appreciation of these processes in complex goemetries, and enhanced predictive capability through use of complex computer codes. The subject is clearly of great fundamental and practical importance. The NATO ASIan Thermal-Hydraulic Fundamentals and Design of Two-Phase Flow Heat Exchangers was held in Povoa de Varzim (near Porto), Portugal, July 6-17, 1987. participating in the organization of" the ASI were the Department of Mechanical Engineering and the Clean Energy Research Institute, University of Miami; Universidade do Porto; and the Department of Mechanical Engineering, Aeronautical Eng ineer ing, and Mechanics, Rensselaer Polytechnic Institute. The ASI was arranged primarily as a high-level teaching activity by experts representing both academic and industrial viewpoints. The program included the presentation of invited lectures, a limited number of related technical papers and discussion sessions.

Inhalt

I. Thermal-Hydraulic Fundamentals.- Classification and Applications of Two-Phase Flow Heat Exchangers.- Basic Relationships for Heat Exchangers.- Assessment of Correlations for Single-Phase Heat Exchangers.- Correlations for Forced Convection in Ducts.- Fundaunentals of Boiling and Evaporation.- Towards Accurate Measurement of Post-CHF Flow Boiling Heat Transfer of Water in a Circular Tube.- Fundamentals of Condensation.- Condensation with Noncondensables and in Multicomponent Mixtures.- Condensate Flow Pattern of Immiscible Liquid Mixtures.- Heat Transfer Augmentation.- Fundamentals of Two-Phase Flow Instabilities.- Fouling.- Particulate Fouling in Boiling Water Systems.- II. Designing of Two-Phase Flow Heat Exchangers and Practice.- Strategy of Heat Exchanger Design.- Elements of Two-Phase Flow in Fossil Boilers.- Post-CHF Heat Transfer in Boiler Tubes.- Two-Phase Pressure Drop in Boiler Tubes.- Design Considerations for Fossil-Fired Steam Generators in Favor of the Once-Through System.- Selected Fluid Phenomena in Water/Steam.- Operating Characteristics and Experience with Once Through Power Boilers.- Application of Once Through Technique.- Nuclear Steam Generators and Waste Heat Boilers.- Evaporators.- Boiling on the Shellside of Horizontal Tube Bundles.- Application of Enhanced Boiling Tubes to Reboilers.- Condensers and Their Design.- Numerical Methods for the Analysis of Flow and Heat Transfer in a Shell-and-Tube Heat Exchanger with Shell-Side Condensation.- Design Considerations for Air-Conditioning Evaporator and Condenser Coils.- Hygroscopic Film Condenser-Evaporator Heat Cycle.- Design of Compact and Enhanced Heat Exchangers for Liquid-Vapor Phase-Change Applications.- Cooling Towers.- Gas-Solid Heat Exchangers.- Fluid Dynamic Design of Heat Exchanger Safety Devices.