June 16, 2025

Two-Phase Microchannel Heat Exchangers for Transcritical CO2 Cycles - Investigation of Heat Transfer and Pressure Drop

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Numerical modeling reveals heat transfer and pressure drop dynamics in transcritical CO2 systems, highlighting design challenges.

The investigation shows that transcritical CO2 cycles can achieve superior thermodynamic efficiency in cooler climates, enhancing performance.
Using numerical models, the analysis identifies key factors affecting heat transfer and pressure drop during phase change.
An Eulerian multiphase model helps accurately predict engineering parameters in heat exchangers for CO2 systems.
Findings suggest effective sizing for a microtube condenser tailored for a 5 MW transcritical CO2 Rankine cycle.

Duggirala et al. (2025) studied this question.

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