Research on design of marine heat exchangers from exhaust gas

• Project/Area Number: 23560979
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Naval and maritime engineering
• Research Institution: National Maritime Research Institute
• Principal Investigator: ADACHI Masaki 独立行政法人海上技術安全研究所, その他部局等, 研究員 (20415805)
• Project Period (FY): 2011 – 2013
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2013: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000); Fiscal Year 2012: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2011: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
• Keywords: 排熱回収 / 船舶 / フィンチューブ / 排ガス / スート / 熱抵抗 / 圧力損失 / 熱伝達率 / 熱伝導 / 熱交換 / 総括伝熱係数 / 熱交換器 / 最適化設計

Research Abstract

Basic research for optimized design of marine exhaust heat exchanger (exhaust gas economizer) includes two experiments: adhesion test of real soot as solid component in the exhaust gas on sample of plate finned tube, and air-water heat exchanging test with bank of plate finned tube, coated with thermal insulating paper as quasi-soot. The former one evidenced formation of soot layer with partial detachment to occlude flow path between adjacent fins. the latter one showed that pressure drop through bank of the finned tube was higher than expected design value, and total heat transfer coefficient was lower than expected value due to the insulating paper layer.