Experimental investigations of oscillatory fluctuation in an ammonia-water mixture turbine system

Yoshiharu Amano, Keisuke Kawanishi, Takumi Hashizume

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)

Abstract

This paper reports results from experimental investigations of the dynamics of an ammonia-water mixture turbine system. The mixture turbine system features Kalina Cycle technology [1]. The working fluid is an ammonia-water mixture (AWM), which enhances the power production recovered from the low-temperature heat source [2], [3]. The Kalina Cycle is superior to the Rankine Cycle for a low temperature heat source [4], [5]. The ammonia-water mixture turbine system has distillation-condensation processes. The subsystem produces ammonia-rich vapor and a lean solution at the separator, and the vapor and the solution converge at the condenser. The mass balance of ammonia and water is maintained by a level control at the separator and reservoirs at the condensers. Since the ammonia mass fraction in the cycle has a high sensitivity to the evaporation/condensation pressure and vapor flow rate in the cycle, the pressure change gives rise to a flow rate change and then level changes in the separators and reservoirs and vice versa. From the experimental investigation of the ammonia-water mixture turbine system, it was observed that the sensitivity of the evaporating flow rate and solution liquid density in the cycle is very high, and those sensitivity factors are affected by the ammonia-mass fraction. This paper presents the experimental results of a study on the dynamics of the distillation process of the ammonia-water mixture turbine system and uses the results of investigation to explain the mechanism of the unstable fluctuation in the system.

Original languageEnglish
Pages (from-to)391-398
Number of pages8
JournalAmerican Society of Mechanical Engineers, Advanced Energy Systems Division (Publication) AES
Volume45
DOIs
Publication statusPublished - 2005 Dec 1
Event2005 ASME International Mechanical Engineering Congress and Exposition, IMECE - Orlando, FL, United States
Duration: 2005 Nov 52005 Nov 11

ASJC Scopus subject areas

  • Mechanical Engineering
  • Energy Engineering and Power Technology

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