Heat and mass transfer in laminar wavy film absorption with the presence of nonabsorbable gases

Thesis/Dissertation · Thu Jan 01 04:00:00 EST 1987

OSTI ID:6420965

Yang, R

Water vapor was absorbed into a falling film of aqueous lithium chloride solution on a vertical tube with the air present in the gas phase acting as the nonabsorbable whose concentrations was accurately detected by a mass-spectrometer gas analyzer. Although the depressing effect of the air on the absorption rate was much more significant in the low air-concentration range, the absorption reduction rate with increasing air concentration was found to be lower than that reported previously. The reduction was found to be continuous even up to 30% of air content. Besides the nonabsorbables, the effects of other operational parameters such as solution flow rate, inlet solution temperature, inlet solution concentration, absorber wall temperature, absorber water vapor pressure, and effective contact length on the absorption rate were also tested. This research was prompted by the need for a new design for the absorber of the open-cycle absorption solar cooling system. In this system the presence of air is unavoidable due, (1) to the exposure of the absorbent to the atmosphere in the solar collector/regenerator and, (2) to the absorbed or entrained air in the make up water (refrigerant).

• Research Organization: Arizona State Univ., Tempe (USA)
• OSTI ID: 6420965
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140901* -- Solar Thermal Utilization-- Space Heating & Cooling
42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
ABSORPTION
CLOSED-CYCLE COOLING SYSTEMS
COOLING SYSTEMS
DESIGN
ENERGY SYSTEMS
ENERGY TRANSFER
EQUIPMENT
FLUID FLOW
FLUIDS
GASES
HEAT TRANSFER
LAMINAR FLOW
MASS TRANSFER
SOLAR ABSORBERS
SOLAR COLLECTORS
SOLAR COOLING SYSTEMS
SOLAR EQUIPMENT
VAPORS
WATER VAPOR