EconPapers    
Economics at your fingertips  
 

Optimization of the Kalina cycle system 34 (KCS34) based on the addition of a second vapor-liquid separator

Xinxin Zhang and Haonan Wei

Energy, 2025, vol. 332, issue C

Abstract: Vapor-liquid separator plays a critical role in the Kalina cycle system, particularly due to the zeotropic properties of ammonia-water mixture. Proper secondary vapor-liquid separation may further utilize the above characteristic. This paper proposes three restructured systems with the addition of a second separator for the Kalina Cycle System 34 (KCS34) and compares them with the original system. The results show that both the restructured system of type A, in which the second separator is placed upstream of Regenerator-1 and connected to the original separator via a throttle valve, and the restructured system of type B, in which the second separator is positioned before Regenerator-2 and connected to the original absorber, are superior to the original system, and the type B is even better. The restructured system of type C, in which the second separator is placed after Regenerator-2, only outperforms the original system at low intermediate pressures. Placing the second separator at the front end of Regenerator-2 has better thermodynamic performance compared to placing it at the back end. Placement at the front end of Regenerator-2 is preferred over placement at the front end of Regenerator-1. At an evaporation pressure of 3 MPa, the highest thermal efficiencies of the restructured system of type A, B and C are 12.04 %, 12.65 %, and 11.76 %, respectively, and the highest exergy efficiencies are 59.56 %, 62.59 %, and 58.16 %, respectively.

Keywords: Kalina cycle system; Vapor-liquid separation; Second separator; Regenerator; Thermodynamic performance (search for similar items in EconPapers)
Date: 2025
References: Add references at CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544225028944
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:332:y:2025:i:c:s0360544225028944

DOI: 10.1016/j.energy.2025.137252

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().

 
Page updated 2025-07-15
Handle: RePEc:eee:energy:v:332:y:2025:i:c:s0360544225028944