SESKA Groundwater Cooling: Borefield design theory and concepts

[摘要] Groundwater cooling is an appropriate and sustainable heat rejection technology for the Pawsey Supercomputer Centre. It makes use of the local Mullaloo aquifer system which is able to provide cool groundwater at high and reliable flow rates, and is readily able to accept water warmed by excess heat.This report has considered a range of engineered pumping system designs and has identified a pumping layout that provides maximum longevity and flexibility of thermal performance with minimal capital requirements for borefield construction. The basic design involves production-injection well doublets.Flow net analysis has shown that shielding wells placed between production and injection wells provide a useful buffer against thermal breakthrough which promotes longevity of heat rejection. Hydrothermal simulations indicate that shielded configurations reduce or delay thermal breakthroughs and hence providegreater energy efficiencies for groundwater cooling systems as compared to unshielded configurations, but at the capital expense of extra injection wells and pipe runs.Based on the findings above it is recommended that the Pawsey groundwater cooling system be designed using a twin-doublet layout with two extra shielding wells (6 wells in total). Further engineering studies are required to ensure the suitability of this conceptual design for the Pawsey site.

[发布日期] 2014-03-31 [发布机构] CSIRO

[学科分类] 地球科学(综合)