Principles, experiments, and numerical studies of supercritical fluid natural circulation system

Lin Chen

Research output: Chapter in Book/Report/Conference proceedingChapter


Due to the unique thermal and transport properties, Supercritical natural circulation loop (NCL, or thermosyphon) has been proposed in many energy conversion systems. This chapter presents the principals of supercritical natural circulation loop system and its application challenges. A specially designed experimental prototype system is introduced and compared with numerical findings. The system is operated in wide range of high pressures in the critical region. It is found that in a supercritical NCL system, very high Reynolds number natural convection flow can be achieved only by simple heating and cooling. Thermal performance analysis and parameter effects are carried out along with the experimental development. The heat transfer dependency on operation and its mechanisms are also explained and summarized in this chapter. The comparison of experimental and numerical results contributes to better understanding of NCL stability phenomena and applications in energy systems.

Original languageEnglish
Title of host publicationAdvanced Applications of Supercritical Fluids in Energy Systems
PublisherIGI Global
Number of pages52
ISBN (Electronic)9781522520481
ISBN (Print)1522520473, 9781522520474
Publication statusPublished - 2017 Mar 24

ASJC Scopus subject areas

  • Energy(all)
  • Engineering(all)
  • Chemical Engineering(all)


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