Titlebar

Export bibliographic data
Literature by the same author
plus on the publication server
plus at Google Scholar

 

Second law analysis of novel working fluid pairs for waste heat recovery by the Kalina cycle

Title data

Eller, Tim ; Heberle, Florian ; Brüggemann, Dieter:
Second law analysis of novel working fluid pairs for waste heat recovery by the Kalina cycle.
In: Energy. Vol. 119 (15 January 2017) . - pp. 188-198.
ISSN 0360-5442
DOI: https://doi.org/10.1016/j.energy.2016.12.081

Project information

Project title:
Project's official titleProject's id
No informationBR 1713/12

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

The organic Rankine cycle (ORC) and the Kalina cycle (KC) are potential thermodynamic concepts for decentralized power generation from industrial waste heat at a temperature level below 500 °C. The aim of this work is to investigate in detail novel zeotropic mixtures as working fluid for the KC and compare to sub- and supercritical ORC based on second law efficiency. Heat source temperature is varied between 200 °C and 400 °C. The results show that second law efficiency of KC can be increased by applying alcohol/alcohol mixtures as working fluid instead of ammonia/water mixtures; especially for heat source temperatures above 250 °C. Efficiency increase is in the range of 16% and 75%. Despite this efficiency improvements, ORC with zeotropic mixtures in sub- and supercritical operation mode proves to be superior to KC in the examined temperature range. Second law efficiency is up to 13% higher than for KC. A maximum second law efficiency of 59.2% is obtained for supercritical ORC with benzene/toluene 36/64 at 400 °C heat source temperature. The higher level of efficiency and the lower complexity of ORC in comparison to KC indicate that ORC with zeotropic mixtures offers the greater potential for waste heat recovery.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Waste heat recovery; Second law analysis; Kalina cycle; Efficiency increase; Alcohol mixtures; Organic Rankine cycle
Institutions of the University: Faculties > Faculty of Engineering Science > Chair Engineering Thermodynamics and Transport Processes
Faculties > Faculty of Engineering Science > Chair Engineering Thermodynamics and Transport Processes > Chair Engineering Thermodynamics and Transport Processes - Univ.-Prof. Dr.-Ing. Dieter Brüggemann
Profile Fields > Emerging Fields > Energy Research and Energy Technology
Research Institutions > Research Units > ZET - Zentrum für Energietechnik
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 15 Mar 2019 07:39
Last Modified: 15 Mar 2019 07:39
URI: https://eref.uni-bayreuth.de/id/eprint/47289