報告書番号

282060

タイトル（和文）

乾式熱交換器の湿式運転による伝熱性能促進実験

タイトル（英文）

HEAT TRANSFER ENHANCEMENT BY WET OPERATION OF A DRY COOLING ASSEMBLY

概要 （図表や脚注は「報告書全文」に掲載しております）

乾式熱交換器の伝熱面を濡らして伝熱促進する湿式運転について，前報の理論的検討につづいて実験的検討を行った結果，促進効果がじゅうぶん得られることがわかった。しかし，なお伝熱モデルの検討，水スプレイ方法の工夫が必要であり，今後の課題である。

概要 （英文）

DRY COOLING FOR WASTE HEAT REJECTION,WHICH HAS SOME MERITS FROM THE STANDPOINTS OF MAKE-UP WATER AND/OR VISIBLE PLUME,WILL BE FEASIBLE TO PARTICULAR KINDS OF POWER PLANTS IN JAPAN WHEN THE COOLING PERFORMANCE IN SUMMER GETS IMPROVED TO ELEVATE THE POWER GENERATING EFFIENCY WITH A ADVANCED CONCEPT OR SOME OPERATION MODES. IN THE FORMER REPORT,THERE WAS PROPOSED AN ADVANCED DRY COOLING BASED ON HELLER SYSTEM AND PRELIMINARILY EVALUATED THE HEAT TRANSFER ENHANCEMENT BYWET OPERATION DELUGING THE OUTSIDE SURFACE OF THE HORIZONTALLY-FITTED FIN TUBES BY A HYPOTHETICAL HEAT TRANSFER MODEL. THIS REPORT SUMMARIZESTHE INTERIM EXPERIMENTAL RESULT FOR THE FIN TUBE ASSEMBLY,THE MODEL OFWHICH WAS USED FOR THE ABOVE-MENTIONED FEASIBILITY STUDY.THE RESULT SHOWS THAT HEAT EXCHANGE ENHANCEMENT BY WET OPERATION IS ENOUGH TO BE APPLIED AND THAT A NEW SPRAYING TECHNIQUE IS NECESSARY TO DISTRIBUTE WATERUNIFORMLY ON THE TUBE ASSEMBLY.

報告者

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