Integration of solid-oxide fuel cells and absorption refrigeration for efficient combined cooling, heat and power production

Krzysztof Matuszny, Tohid N. Borhani, Seyed A. Nabavi, Dawid P. Hanak

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Combined cooling, heating and power (CCHP) systems are characterized by a substantially higher energy-utilization efficiency compared to standalone systems. In this study, an integrated system comprising a solid-oxide fuel cell (SOFC), hot-water storage tank (HWST) and absorption refrigeration (AR) cycle is considered. The SOFC model was developed in Aspen Plus®. It was used to determine the thermodynamic properties of the exhaust gas that was then used to provide heat for the HWST and to drive the AR cycle. Thermodynamic models for the AR cycles were developed in Engineering Equation Solver, considering LiBr-H2O and NH3-H2O as working fluids. The sensitivity analysis of a number of SOFC output parameters has been carried out. The most optimal case was characterized with the coefficient of performance (COP) and CCHP efficiency of 0.806 and 85.2% for the LiBr-H2O system, and 0.649 and 83.6% for the NH3-H2O system, respectively. Under such optimal operating conditions, the SOFC was characterized by the net electrical efficiency of 57.5% and the net power output of 123.66 kW. Data from the optimal solution were used to perform the thermodynamic study and sensitivity analysis to assess the influence of different absorption cycle operating conditions and to identify possible applications for the considered integrated systems.

Original languageEnglish
Pages (from-to)328-348
Number of pages21
JournalClean Energy
Volume4
Issue number4
Early online date22 Dec 2020
DOIs
Publication statusPublished - Dec 2020

Keywords

  • absorption refrigeration
  • hot-water storage tank
  • process integration
  • solid-oxide fuel cell
  • tri-generation

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Environmental Engineering
  • Management, Monitoring, Policy and Law

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