粤东陆丰海域温排水输运及取排水工程布置原则分析

Analysis on transportation of discharged cooling water and layout principle for water intake and drainage works in Lufeng Sea-area of East Guangdong

本文对广东陆丰甲湖湾水域潮流特性及冷却水输移扩散进行模拟计算,对比分析近岸浅排与离岸深排、集中排水与分散排水在本工程中适宜性。据此,提出了类似潮流条件取排水口的布置原则。对西取东排与东取西排、深排与浅排、合排与分排等组合的分析表明,西取东排符合粤东沿岸流输运规律。受工程海域弧形海岸、防波堤修筑及工程取水、排水等因素形成的曲线流动及小尺度涡旋影响,深排方案虽不具备差位式取排水口布置的典型效果,但热水不易窝积,取水温升小。东西分排方案热水窝积且输运短路,取水温升超过2.0℃。类似潮流条件下西取东排、离岸深排、东侧分排或合排是较为适宜的取排水口布置形式。

The tidal current characteristics in Jiahuwan Sea-area at Lufeng of Guangdong province and the discharged cooling wa- ter transportation-diffusion are simulatively calculated herein, in which the adapatabililties of the alongshore shallow drainage and offshore deep drainage, the concentrated drainage and decentralized drainage in the project are comparatively analyzed. On the basis of this, the layout principle of the water intake and drainage works for the similar condition of tidal current is put forward. The analysis made on the combinations of west-intake with east-drainage and east-intake with west-intake, deep drainage and shallow drainage, integrated drainage and separated drainage, etc. show that the layout of west-intake and east-drainage accords with the transportation law of the offshore current. Though the deep-drainage scheme has no the typical effect of the layout of the differential water intake and drainage works, yet the warm water is not easily collected and the temperature-rise of the intaking water is small under the impacts from the curved flow and small-sized eddy formed by the factors of the curved seacoast, con- struction of seawall and the water intake and drainage of the project. For the schemes of the east and west separated drainages, the warm water is to be collected with the ＂short circuit＂ of the transportation, moreover, the temperature-rise of the intaking water is to be over 2. 0 ℃as well. The layouts of the west-intake with east-drainage, the offshore deep drainage, the east sepa- rated or integrated drainages are more adaptable for the layout of the water intake and drainage works.