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Performance Improvement Options for the Supercritical Carbon Dioxide Brayton Cycle

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Performance Improvement Options for the Supercritical Carbon Dioxide Brayton Cycle ( performance-improvement-options-supercritical-carbon-dioxide )

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Table 1. Reference S-CO2 Cycle Component Design and Nominal Operating Conditions |---------------|------------------------------|----------|-------|-----------------------------------| | Division | Items |Spec. (SI)| Unit | Remarks | |---------------|------------------------------|----------|-------|-----------------------------------| | High | Temperature | Recuperator | | | | | | | | | | | | | | | | | | | | | | Type | | Quantity | | Heat transfer capacity | | Heat transfer area | | Unit width | | Unit height | | Unit length | | Heat transfer length | | Channel diameter | | Channel pitch | | Plate thickness | | Plate material | | Number of plates | | Hot side number of channels | PCHE | 64 | 4.15 | MWt 134.6 | m2 1.500 | m 0.600 | m 0.600 | m 0.380 | m 1.5 | mm | | | All parameters below are per unit | | Type | Quantity | Heat transfer capacity | Heat transfer area | Unit width | Unit height | Unit length | Heat transfer length | Plate material | Number of plates | Number of Na channels | Na plate thickness | Na channel diameter | Na channel pitch | Na channel length | Na channel angle | Number of CO2 channels | CO2 plate thickness | CO2 channel diameter | CO2 channel pitch | CO2 channel length | CO2 channel angle | Void fraction | Sodium temperature inlet | Sodium temperature outlet | Sodium flow rate | Pressure drop on Na side | Sodium inventory | Sodium residence time | Sodium average speed | CO2 temperature inlet | CO2 temperature outlet | CO2 pressure inlet | CO2 pressure outlet | CO2 flow rate | Effectiveness | Metal mass | Cost | CO2 mass | All parameters below are per unit | | | | | | | | | | | channel | | region | | | | channel | | region | | | | | | | | | | | | | | | | | | conditions | | Na-CO2 | Heat | Exchanger | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |---------------|------------------------------|----------|-------|-----------------------------------| | Hot side channel | Hot side channel | Cold side number | Cold side channel length | | Cold side channel angle | | Void fraction | | Hot side temperature inlet | | Hot side temperature outlet | | Hot side pressure inlet | | Hot side pressure outlet | 2.3 | 2.0 | SS316 | 141 | 564 | 0.439 | 60.0 | 461 | 0.537 | 90.0 | 19.2 | 362.3 | 191.1 | 7.731 | 7.690 | mm mm m deg m deg % C C MPa MPa | | | | Each side | Per plate | Heat transfer | | Per plate | Heat transfer | | From channels | | | | | | | | | region | | | region | | | | | | | length | angle | of channels | | PCHE | | 64 | | 3.91 | MWt | 133.5 | m2 | 0.600 | m | 0.600 | m | 1.000 | m | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 0.780 | | SS316 | | 141 | | 236 | | 2.00 | mm | 2.0 | mm | 2.4 | mm | 0.780 | m | 0.0 | deg | 204 | Each side Per plate | 2.00 | mm | 2.0 | mm | 2.4 | mm | 0.901 | m | 60.0 | deg | 30.9 | % Semi-circular Heat transfer per plate Semi-circular Heat transfer From channels 11 m | 488.0 | C | 333.0 | C | 19.7 | kg/s | 2.5 | kPa | 34.9 | kg | 1.777 | s | 0.439 | m/s | 323.4 | C | 471.7 | C | 19.907 | MPa | 19.843 | MPa | 21.5 | kg/s | 94.2 | % | 1.854 | tonnes| | 111.3 | K$ | At $60/kg | 6.5 | kg | Operating only only only HT region HT region HT region Dry | | | | | | | Semi-circular channel | | | | | | |

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