Abstract

A one-dimensional design and dynamic model of a microtube heat exchanger is presented for cooling supercritical CO2 to near critical conditions (35°C and ∼90 bar) with water. A control strategy is designed and implemented to achieve a desired hot-side CO2 outlet temperature, while the cooling-water exit temperature is monitored (ideally kept below 50°C). The control responses during drastic process changes at the boundaries such as sCO2 inlet flow/pressure and cooling water inlet temperature are presented.

Volume Subject Area:
Supercritical CO2 Power Cycles
Topics:
Brayton cycle, Control modeling, Supercritical carbon dioxide, Water, Cooling, Temperature, Carbon dioxide, Design, Dynamic models, Flow (Dynamics), Heat exchangers, Pressure
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Copyright © 2019 by ASME. This work was authored in part by a U.S. Government employee in the scope of his/her employment. ASME disclaims all interest in the U.S. Government’s contribution.
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