Journal
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
Volume 142, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.rser.2021.110807
Keywords
Absorption refrigeration; Single-effect; Double-effect; Falling-film; Spray absorber; Bubble absorber; Microchannel absorber; Solution heat exchanger
Funding
- NPRP award from the Qatar National Research Fund (Qatar Foundation) [NPRP101215160030]
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Absorption refrigeration systems have been proposed as a reliable alternative to conventional vapor compression systems, but they are still not as efficient. Recent advances in the field include research on falling-film, spray, bubble and microchannel absorbers, as well as the use of passive enhancement techniques such as surface modifications, surfactants, and nanofluids.
Absorption refrigeration systems have been proposed as a reliable alternative to conventional vapor compression systems over the years. In the past, efforts have been made to comprehend the performance of absorption refrigeration systems based on thermodynamic analysis, experimentation and numerical simulations. However, absorption refrigeration systems are still not as efficient as vapor compression systems. Hence, the current review aims to highlight recent advances in the field of absorption refrigeration. Specifically, it covers recent development in the areas of falling-film, spray, bubble and microchannel absorbers. In the review, the roles of passive enhancement techniques including surface modifications, use of surfactants, and nanofluids used predominantly in falling film absorbers are discussed. Similarly, recent developments and findings in the study of bubble and spray absorbers are also presented in detail. Lastly, the review also covers recent developments in novel absorbers such as microchannel absorbers.
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