Numerical simulation of water injection for pre-cooling inlet air in dry cooling towers
Paper
Paper/Presentation Title | Numerical simulation of water injection for pre-cooling inlet air in dry cooling towers |
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Presentation Type | Paper |
Authors | Alkhedhair, A., Gurgenci, H., Jahn, I. and Guan, Z. |
Number of Pages | 16 |
Year | 2013 |
Place of Publication | United States |
Conference/Event | 16th IAHR Cooling Tower and Air-cooled Heat Exchanger Conference (IAHR 16) |
Event Details | 16th IAHR Cooling Tower and Air-cooled Heat Exchanger Conference (IAHR 16) Delivery In person Event Date 30 Sep 0201 to end of 02 Oct 2013 Event Location Minsk, Belarus |
Abstract | Power plants utilizing dry cooling technologies experience a significant reduction in power generation during high ambient temperature periods. In certain instances, dry cooling tower performance can be enhanced during these periods, by spraying water into the inlet air. However, this requires careful consideration of water spray generation, as too large droplets may not fully evaporate before reaching the heat exchanger bundles. This can introduce potential issues including: corrosion and scaling of heat exchanger surface. This paper presents a numerical investigation of inlet air pre-cooling with water sprays to enhance performance in Natural Draft Cooling Towers (NDDCT). A 3-D numerical model of a test channel (approximating the inlet flow in a NDDCT) was generated and the evaporation from a single spray nozzle was analysed using the Eulerian-Lagrangian model in FLUENT. Using the numerically validated model, the droplet transport, the droplet evaporation, and the resulting cooling of the air were predicted for a range of inlet air conditions and a number of spray droplet diameters and injection rates. The impacts of droplet size and air velocity on were characterised. The numerical predictions revealed that spray cooling system can enhance the cooling performance significantly. Furthermore, droplet transport and evaporation depend largely on droplet size and air velocity. |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 4012. Fluid mechanics and thermal engineering |
Public Notes | There are no files associated with this item. |
Byline Affiliations | No affiliation |
https://research.usq.edu.au/item/z2109/numerical-simulation-of-water-injection-for-pre-cooling-inlet-air-in-dry-cooling-towers
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