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Journal of Enhanced Heat Transfer
Facteur d'impact: 0.562 Facteur d'impact sur 5 ans: 0.605 SJR: 0.211 SNIP: 0.361 CiteScore™: 0.33

ISSN Imprimer: 1065-5131
ISSN En ligne: 1026-5511

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Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.2017024681
pages 263-282

RESOLVING THE ENERGY–WATER NEXUS IN LARGE THERMOELECTRIC POWER PLANTS: A CASE FOR APPLICATION OF ENHANCED HEAT TRANSFER AND HIGH-PERFORMANCE THERMAL ENERGY STORAGE

Raj M. Manglik
Thermal-Fluids and Thermal Processing Laboratory, Mechanical and Materials Engineering, University of Cincinnati, 2600 Clifton Ave, Cincinnati, OH 45220, USA
Milind A. Jog
Thermal-Fluids and Thermal Processing Laboratory, Department of Mechanical and Materials Engineering, University of Cincinnati, 2600 Clifton Ave, Cincinnati, OH 45220, USA

RÉSUMÉ

The acute energy and water consumption stress on global economies warrants a reexamination of the energy–water nexus and urgent innovative engineering solutions. To address the attendant challenges in large-scale thermoelectric power plants, especially where evaporative cooling towers are used that consume more than 73% of their annual cooling water withdrawals, a transformative dry-cooling (or air-cooling) system is proposed, which consists of a novel daytime peak-load shifting system that pre-cools the daytime peak-temperature air in order to mitigate concomitant second-law limitation for air cooling. The highly compact and enhanced air pre-cooler transfers the daytime heat load to a unique thermal energy storage (TES) system. The TES operates over a range of temperatures and is recharged by an asynchronous nighttime air-cooled exchanger. Moreover, the air-cooled condenser (ACC) is designed with an enhanced surface core, with substantially higher heat transfer coefficients, such that it operates with a smaller inlet temperature difference. This allows the ACC to sustain lower condensing pressures. Thus, the system not only makes dry air cooling (zero net water dissipation for cooling) viable but also significantly increases the power plant output.


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