Marangoni effect on the process of steam absorption into falling film of an aqueous solution of LiBr

Journal Article · Tue Mar 01 04:00:00 EST 1994 · Heat Transfer - Japanese Research; (United States)

OSTI ID:5052978

Kashiwagi, Takao ^[1]; Rie, Dongho ^[2]; Nomura, Tomohiro ^[3]; Omata, Koji ^[4]; Kurosawa, Shigekichi

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1. Tokyo Univ. of A and T (Japan). Dept. of Mechanical Systems Engineering
2. Inchon Univ. (Japan). Dept. of Industrial Safety Engineering
3. Osaka City Univ. (Japan). Dept. of Mechanical Engineering
4. Asahi Glass Co., Ltd., Tokyo (Japan)

In most commercial machines, absorption enhancement has been done by adding small various kinds of surfactants, thereby reducing the surface tension of the absorbent solution and generating Marangoni convection near the solution surface during the refrigerant vapor-absorption process. This paper clarifies the most effective conditions of surfactant addition for absorption enhancement in the process of refrigerant vapor absorption into a vertical falling absorbent film. H[sub 2]O/LiBr and n-octanol were used as the refrigerant/absorbent combination and additive. Experiments were carried out by using an LiBr aqueous solution with and without n-octanol dissolution. Moreover, n-octanol vapor was supplied to the absorber in order to clarify the effect of an additive on absorption enhancement. The results of these experiments reveal that the presence of dropwise n-octanol in the surface of the absorbent falling film contributed significantly to the generation of violent and irregular Marangoni convection.

• OSTI ID: 5052978
• Journal Information: Heat Transfer - Japanese Research; (United States), Journal Name: Heat Transfer - Japanese Research; (United States) Vol. 22:4; ISSN 0096-0802; ISSN HTJPAU
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320303* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Equipment & Processes
ABSORPTION REFRIGERATION CYCLE
ADSORPTION HEAT
AUGMENTATION
EFFICIENCY
ENERGY CONSERVATION
ENERGY EFFICIENCY
ENERGY TRANSFER
ENTHALPY
HEAT TRANSFER
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES