Thermodynamic performance of a supercritical CO2 cycle integrated with a recuperative absorption cooling system

Faisal Asfand, Dhinesh Thanganadar, Kumar Patchigolla

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Supercritical CO2 (sCO2) cycles have been intensively investigated in the last decade and continued improvements in the cycle thermal efficiency is demonstrated using different cycle configurations. The performance of these cycles is significantly affected as the sCO2 compressor inlet temperature moves away from the critical point which would be a function of ambient temperature. The precooler inlet temperature for a simple recuperative sCO2 cycle is in the range of 100-120 °C, and varies based on the recuperator effectiveness, compressor inlet temperature and cycle pressure ratio changes. This work explores the potential benefits of integrating an absorption chiller to recuperate the waste heat of the sCO2 cycle to produce combined power and cooling. The combined power generation and cooling can significantly improve the primary energy utilisation efficiency as compared to its individual productions. In the proposed cycle, part of the cold energy is utilised for power block cooling and the rest for space cooling. This approach will not only allow the performance of the power plant to be less dependent on ambient conditions but also enhance the efficiency and allow reduction in the power plant water consumption. Thermodynamic analysis shows that the proposed integrated cycle efficiency can be enhanced up to 5% at an ambient temperature of 50 °C. In addition, the absorption chiller is capable of providing 1300 tons of space cooling when the chiller is isolated from the pre-cooler, at a temperature of 45 °C in the case of a 10 MWe sCO2 power plant.

Original languageEnglish
Title of host publicationECOS 2019
Subtitle of host publicationProceedings of the 32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems
EditorsWojciech Stanek, Pawel Gladysz, Sebastian Werle, Wojciech Adamczyk
PublisherInstitute of Thermal Technology
Pages3895-3903
Number of pages9
Volume2019-June
ISBN (Print)9788361506515
Publication statusPublished - 1 Jun 2019
Externally publishedYes
Event32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems - Wroclaw, Poland
Duration: 23 Jun 201928 Jun 2019
Conference number: 32
http://www.s-conferences.eu/ecos2019 (Conference link)

Conference

Conference32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems
Abbreviated titleECOS 2019
CountryPoland
CityWroclaw
Period23/06/1928/06/19
Internet address

Fingerprint Dive into the research topics of 'Thermodynamic performance of a supercritical CO<sub>2</sub> cycle integrated with a recuperative absorption cooling system'. Together they form a unique fingerprint.

  • Cite this

    Asfand, F., Thanganadar, D., & Patchigolla, K. (2019). Thermodynamic performance of a supercritical CO2 cycle integrated with a recuperative absorption cooling system. In W. Stanek, P. Gladysz, S. Werle, & W. Adamczyk (Eds.), ECOS 2019 : Proceedings of the 32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (Vol. 2019-June, pp. 3895-3903). Institute of Thermal Technology.