Heat exchangers for cooling supercritical carbon dioxide and heat transfer enhancement: A review and assessment
نویسندگان
چکیده
Supercritical and trans-critical carbon dioxide cycles are widely used for refrigerators, heat pumps power plants, of which the exchangers key components. This article presents a critical review cooled supercritical (SCO2) flows, within CO 2 is close to its point thus likely experience transfer deterioration or enhancement due dramatical change thermo-physical properties. First, SCO2 features were highlighted. Second, characteristics in analysed detail, including experiment, CFD simulation, dynamic response, design exchanger. Third, was summarized. An approach representing transport property constants versus temperature proposed, methods may be potentially applicable exchanger assessed selected according performance evaluation criterion efficiency as well MATLAB optimization. It demonstrated that polynomial Gaussian probability density function can reflect variation with mathematically thermal response analysis. When cooling works at Reynolds numbers R e = 1 .9 × 10 4 -2.55 5 , protrusion, rough element twisted tape insert approaches nano-coating more suitable SCO2, but numerical experimental confirmation desirable. A preliminary guidance design, optimization experiment project offered. • The literature on reviewed. Heat enhancements assessed. method standing properties proposed. Protrusion, inserts SCO2.
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ژورنال
عنوان ژورنال: Energy Reports
سال: 2021
ISSN: ['2352-4847']
DOI: https://doi.org/10.1016/j.egyr.2021.06.089