Spirally Fluted Tube Heat Exchanger as a Condenser and Evaporator

摘要

A new type of spirally fluted tube has been tested in a shell-and-tube heat exchanger in both condensing and evaporating service and has shown substantial improvement in performance over that expected from a comparable exchanger with plain tubes. The condensation tests were run with ammonia and R-114 condensing on the shell side with cooling water in the tubes. The evaporation tests were run with R-114 and R-11 boiling on the tube side in upward forced convection and steam condensing on the shell side as the heating medium. The spirally fluted tube heat exchanger was tested for industrial cogeneration applications, including organic Rankine cycles. However, it has potential applications for ocean energy, heat pump systems, and process industries. (ERA citation 11:038621)