Development of a multi-level approach to model and optimise the Kalina Split Cycle

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2012

Standard

Development of a multi-level approach to model and optimise the Kalina Split Cycle. / Larsen, Ulrik; Nguyen, Tuong-Van; Haglind, Fredrik.

Proceedings of the 53rd SIMS conference on Simulation and Modelling. 2012.

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2012

Harvard

Larsen, U, Nguyen, T-V & Haglind, F 2012, 'Development of a multi-level approach to model and optimise the Kalina Split Cycle'. in Proceedings of the 53rd SIMS conference on Simulation and Modelling.

APA

Larsen, U., Nguyen, T-V., & Haglind, F. (2012). Development of a multi-level approach to model and optimise the Kalina Split Cycle. In Proceedings of the 53rd SIMS conference on Simulation and Modelling.

CBE

Larsen U, Nguyen T-V, Haglind F. 2012. Development of a multi-level approach to model and optimise the Kalina Split Cycle. In Proceedings of the 53rd SIMS conference on Simulation and Modelling.

MLA

Vancouver

Larsen U, Nguyen T-V, Haglind F. Development of a multi-level approach to model and optimise the Kalina Split Cycle. In Proceedings of the 53rd SIMS conference on Simulation and Modelling. 2012.

Author

Larsen, Ulrik; Nguyen, Tuong-Van; Haglind, Fredrik / Development of a multi-level approach to model and optimise the Kalina Split Cycle.

Proceedings of the 53rd SIMS conference on Simulation and Modelling. 2012.

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2012

Bibtex

@inbook{6765ef1c3a04473289e1571d21625d30,
title = "Development of a multi-level approach to model and optimise the Kalina Split Cycle",
author = "Ulrik Larsen and Tuong-Van Nguyen and Fredrik Haglind",
year = "2012",
booktitle = "Proceedings of the 53rd SIMS conference on Simulation and Modelling",

}

RIS

TY - GEN

T1 - Development of a multi-level approach to model and optimise the Kalina Split Cycle

A1 - Larsen,Ulrik

A1 - Nguyen,Tuong-Van

A1 - Haglind,Fredrik

AU - Larsen,Ulrik

AU - Nguyen,Tuong-Van

AU - Haglind,Fredrik

PY - 2012

Y1 - 2012

N2 - In the marine sector there is a strong motivation for increasing the propulsion system energy efficiency, mainly because of increasing fuel prices and stricter upcoming emission regulations. The Kalina cycle, based on a mixture of ammonia and water as working fluid, exhibits higher conversion efficiencies than conventional power cycles and could be suitable for this purpose. The Split Cycle technique provides a method to further increase the thermal efficiency, by reducing the thermodynamic losses in the heat recovery system. This is achieved by having two separate streams of different ammonia concentrations entering and leaving a first evaporator stage before being mixed <br/>at the inlet of a second evaporator stage. It seems that modelling efforts showing the advantages of the Split Cycle have not been presented in the literature yet. Thus, a thermodynamic model of the Split Cycle is introduced in this work. Modelling and optimisation of the rather complex cycle requires approaching the problem at different system levels. This paper investigates tools and methods suitable for demonstrating the feasibility and advantages of the Split Cycle. The integrated model developed and presented in this paper combines three sub-models all using the NIST REFPROP equations of state: a separator and mixing subsystem model to handle the inherent constraints of the Split Cycle, a component-based model to optimise the heat exchanger operating conditions, and a process model to investigate the complete thermodynamic cycle. Results suggest a 9% net power output increase and 7% higher thermal efficiency compared to the baseline case.

AB - In the marine sector there is a strong motivation for increasing the propulsion system energy efficiency, mainly because of increasing fuel prices and stricter upcoming emission regulations. The Kalina cycle, based on a mixture of ammonia and water as working fluid, exhibits higher conversion efficiencies than conventional power cycles and could be suitable for this purpose. The Split Cycle technique provides a method to further increase the thermal efficiency, by reducing the thermodynamic losses in the heat recovery system. This is achieved by having two separate streams of different ammonia concentrations entering and leaving a first evaporator stage before being mixed <br/>at the inlet of a second evaporator stage. It seems that modelling efforts showing the advantages of the Split Cycle have not been presented in the literature yet. Thus, a thermodynamic model of the Split Cycle is introduced in this work. Modelling and optimisation of the rather complex cycle requires approaching the problem at different system levels. This paper investigates tools and methods suitable for demonstrating the feasibility and advantages of the Split Cycle. The integrated model developed and presented in this paper combines three sub-models all using the NIST REFPROP equations of state: a separator and mixing subsystem model to handle the inherent constraints of the Split Cycle, a component-based model to optimise the heat exchanger operating conditions, and a process model to investigate the complete thermodynamic cycle. Results suggest a 9% net power output increase and 7% higher thermal efficiency compared to the baseline case.

KW - Kalina split cycle

KW - Multi-level modelling

KW - Process integration

KW - Waste heat recovery

BT - Proceedings of the 53rd SIMS conference on Simulation and Modelling

T2 - Proceedings of the 53rd SIMS conference on Simulation and Modelling

ER -