Design method for heating towers used in vapor-compression heat pump systems

Huang, Shifang; Xie, Lingyun; Lu, Lin; Zhang, Xiaosong

doi:10.1016/j.buildenv.2020.107532

Cited by 9 publications

(2 citation statements)

References 23 publications

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“…For example, Tanda et al [13] used polyethylene glycol (PEG) solution as a desiccant solution to develop mass transfer correlation for a spray column. Huang et al [14] used CaCl 2 aqueous solution as a working solution to model heat and mass transfer behaviors for a heating tower. Similar to the spray droplet, the model for carbon dioxide captured by a stationary single droplet was developed by Chen et al [15] to analyze effects of temperature and time on the absorption rate and the concentration of carbon dioxide.…”

Section: Introductionmentioning

confidence: 99%

“…, α = 0.00104 for metal pall rings, α = 0.00473 for metal IMTP, α = 0.0084 for sheet metal structured packing Re, Sc [24] dimensionless correlation (packed bed) Although the dimensionless form was still held, the dimensionless groups for physical properties of fluid flow were not considered by Huang et al [14] to regress the relationship between mass transfer coefficient and flow rates. In addition, the correlation for mass transfer coefficient was also developed directly by the operating variables affecting the mass transfer coefficient without considering the dimension.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Vapor Pressure of Desiccant Solution on Mass Transfer Performance for a Spray-Bed Absorber

Chung

2021

Processes

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The depression in vapor pressure caused by adding desiccant to liquid water can be regarded as the driving force for the dehumidification process. The vapor pressure depends on the temperature and the concentration. Therefore, the purpose in this study is to discuss the mass transfer performance affected by operating variables and to show that the vapor pressure is a key factor affecting the mass transfer performance for absorbing water vapor by triethylene glycol (TEG) solution. The experimental results showed that the mass transfer coefficients were decreased with increases in the temperature and increased with increases in the concentration, respectively, while the mass transfer coefficients were increased with increases in the vapor pressure depression. Although both the average error is within 5% among the mass transfer correlation involving the vapor pressure and that involving the temperature and the concentration in predicting the mass transfer coefficient, there are just two terms, those are vapor pressure and fluid flow rate, associated with operating variables used in the mass transfer correlation. The depression in vapor pressure was not only proved to be the driving force for absorbing water vapor by a desiccant solution, but also a key factor affecting the mass transfer performance.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%