Abstract
Concentrated solar power (CSP) with thermal storage is a renewable approach for meeting baseload and peak load electric power. An additivelymanufactured (AM) supercritical carbon di-oxide microscale pin array receiver, MPAR, is introduced as an option for a gaseous receiver for CSP. A numerical model is developed to compare the performance of the additively manufactured pin array receiver (AM2PAR) and a microlaminated pin array receiver (µLPAR). Thermofluidic experimental data from an AM heat sink are used to validate correlations used in the model. When compared to traditional microlamination approach, which consists of etching and bonding, AM enables longer pin array lengths, thus reducing the complexity and mass of the header network, without compromising the thermal efficiency or peak surface temperature. Furthermore, the impact of non-uniform heat flux on an AM2PAR central receiver is characterized. To improve the creep life of the AM2PAR, a design with tunable pin array height in accordance to the flux on the module is introduced. Operational adjustments required to ensure the creep life of the receiver meets a 30-year lifetime for CSP are discussed.
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