Modeling and Evaluation of the Thermohydraulic Performance of Compact Recuperative Heat Exchangers in Supercritical Carbon Dioxide Waste Heat to Power Conversion Systems
نویسندگان
چکیده
Compact recuperative heat exchangers are critical components in supercritical carbon dioxide (sCO2) waste to power conversion systems. To investigate their thermohydraulic performance, a model based on the segmental design and ?-NTU method has been developed. Four different types of exchanger have considered: printed circuit with straight channels (PCHE-SC); zigzag (PCHE-ZC); microtube (MTHE); separator sheets (MTHE-SS). The performance for fluid mass flow rates, temperatures, lengths was investigated terms Nusselt number, transfer coefficient, friction factor, pressure drop, rate, entropy generation augmentation number. Results show that these parameters significantly impact compact optimal design. For same operating conditions equal PCHE-ZC MTHE-SS can smaller size than PCHE-SC MTHE. number also demonstrates improved compactness arise from sheets, making them suitable demanding high temperature applications such as sCO2
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ژورنال
عنوان ژورنال: Heat Transfer Engineering
سال: 2021
ISSN: ['0145-7632', '1521-0537']
DOI: https://doi.org/10.1080/01457632.2021.1943833