Feasibility study of micro kalina cycle for hot spring power generation

Ryosuke Akimoto, Takehiro Yamaki, Yasuhiko Suzuki, Masaru Nakaiwa, Keigo Matsuda*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


A model-based approach was employed to examine the applicability of a micro-Kalina cycle of up to 20 kW (about 373 K) with a working fluid of ammonia/water for low-grade geothermal heat energy. It was found possible to generate 15‒24 kW using hot springs (353‒393 K, 10,000 kg/h). It was also found that the micro-Kalina cycle shows a temperature glide like a Lorenz cycle under the simulation conditions, and that it had higher power generation performance than the organic Rankin cycle.

Original languageEnglish
Pages (from-to)143-147
Number of pages5
Journalkagaku kogaku ronbunshu
Issue number5
Publication statusPublished - 2021
Externally publishedYes


  • Hot Spring Power Generation
  • Lorenz Cycle
  • Micro Kalina Cycle
  • Process design
  • Simulation

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)


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