Investigation on the Effects of Nanorefrigerants in a Combined Cycle of Ejector Refrigeration Cycle and Kalina Cycle

SEÇKİN C.

Journal of Energy Resources Technology, Transactions of the ASME, cilt.146, sa.2, 2024 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 146 Sayı: 2
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1115/1.4063920
  • Dergi Adı: Journal of Energy Resources Technology, Transactions of the ASME
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Applied Science & Technology Source, Aquatic Science & Fisheries Abstracts (ASFA), Communication Abstracts, Compendex, Computer & Applied Sciences, Environment Index, INSPEC, Metadex, Pollution Abstracts, Civil Engineering Abstracts
  • Anahtar Kelimeler: combined refrigeration and power cycle, ejector refrigeration cycle, energy conversion/systems, energy systems analysis, Kalina cycle, nanorefrigerant
  • Marmara Üniversitesi Adresli: Evet

Özet

The main objective of this study is to carry out the thermodynamic analysis of a new power/ refrigeration combined cycle which consists of an ejector refrigeration cycle (ERC) and a Kalina cycle. In ERC, nanorefrigerants are used as the working fluid. Used nanorefrigerants are homogenous mixtures of different base refrigerants (R134a, R152a, and R290) and nanoparticles (TiO2 and Al2O3) with 0–5 wt% nanoparticle concentration. The effects of variation in system operational parameters (nanoparticle mass fraction, evaporator pressure, condenser pressure) on energy efficiency and exergy efficiency of the combined cycle are reported. Additionally, net power production, refrigeration capacity, heat input to the combined cycle, and their exergy contents are given for the case of TiO2/R290 nanorefrigerant use in ERC. This study is the first ERC analysis in which the effect of R152a and R290 base refrigerants and TiO2 nanoparticle use on ERC performance is investigated. The results show that as the nanoparticle concentration and evaporator pressure increase and condenser pressure decreases, the energy and exergy efficiencies of the cycle increase. Under all the considered operational conditions of the combined cycle, the highest efficiency results are obtained for R290 and the lowest for R134a-based refrigerants. [DOI: 10.1115/1.4063920]