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Lubricant-impregnated surfaces (LIS) incorporated with the oil supply system for enhanced durability and condensation heat transfer performance. 

Number: No 312

Author(s) : SEO D., SHIM J., LEE C., NAM Y.

Summary

Recently, lubricant-impregnated surfaces (LIS) has been introduced as a promising advanced condenser surface due to easy shedding of droplets and rapid clearing of nucleation sites induced by the infused lubricant layer. However, such surfaces have faced the critical limitation on the durability that the oil layer impregnated within surface structures can be depleted during condensation. Here we suggest a LIS condenser integrated with an oil supply system (LIS_O) which can achieve remarkable improvement in the durability and the condensation heat transfer coefficient. The stationary brush, which physically contacts onto the rotational tube condenser, is used to replenish the lost oil onto the LIS surface. The oil in the brush hairs are spontaneously and quickly recharged from the oil reservoir using the principle of the capillary rise effect. Using a controlled environmental chamber, the improved durability and condensation heat transfer of LIS_O are quantitatively compared to the conventional LIS surface. We experimentally demonstrate 86‒232% and 26‒61% higher condensation heat transfer coefficients compared to the untreated bare and the hydrophobic surfaces, respectively.

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Details

  • Original title: Lubricant-impregnated surfaces (LIS) incorporated with the oil supply system for enhanced durability and condensation heat transfer performance. 
  • Record ID : 30030094
  • Languages: English
  • Subject: Technology
  • Source: 13th IEA Heat Pump Conference 2021: Heat Pumps – Mission for the Green World. Conference proceedings [full papers]
  • Publication date: 2021/08/31

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