Advertisement

Study on the Optimal Cooling Power for the Internally Cooled Ultrasonic Atomization Dehumidifier with Liquid Desiccant

  • Ruiyang Tao
  • Zili YangEmail author
  • Yanming Kang
  • Zhiwei Lian
Conference paper
  • 210 Downloads
Part of the Environmental Science and Engineering book series (ESE)

Abstract

In this work, performance simulations on the internally cooled ultrasonic atomization system (IC-UADS) were carried out to clear the effects of the input cooling power on promoting the dehumidification performance. The performance model was established based on the conservation laws of mass and energy, together with the sensible heat balance equation, and then well-validated within the constructed IC-UADS. Three indices, namely the dehumidification effectiveness, the moisture removal rate, and the specific moisture removal rate per cooling power were employed. It was found that though the dehumidification performance was growing continuously with the rise of cooling power, the increase rate was descending significantly. Considering the balance between the cooling power consumption and the dehumidification performance improvement, the optimal power input, around 0.53 kW for the current IC-UADS, was figured out for energy-efficient performance improvement. The results may help clarify the necessary cooling power input and optimize the operation of the internally cooled liquid desiccant systems.

Keywords

Internal cooling Ultrasonic atomization Liquid desiccant Optimal cooling Dehumidification 

Nomenclature

Cp

Specific thermal capacity, (kJ/(kg K))

d

Humidity ratio, (g/kg dry air)

G

Mass flow rate, (kg/s)

h

Enthalpy, (kJ/kg)

Mol

Molar mass, (g/mol)

t

Temperature, (°C)

n

Desiccant mass fraction, (%)

p

Pressure, (Pa)

Subscripts

a

Air

c

Cooling

d

Dry air

equ

Equilibrium

i

Inlet

l

Liquid desiccant

o

Outlet

Notes

Acknowledgements

This work is financially supported by the Shanghai Sailing Program (No. 19YF1401800), the Fundamental Research Funds for the Central Universities of China (No. 2232018D3-36), and the China Postdoctoral Science Foundation (No. 2018M630385).

References

  1. 1.
    Luo, Y., Wang, M., Yang, H., Lu, L., Peng, J.: Experimental study of internally cooled liquid desiccant dehumidification: application in Hong Kong and intensive analysis of influencing factors. Build. Environ. 93, 210–220 (2015).  https://doi.org/10.1016/j.buildenv.2015.05.022CrossRefGoogle Scholar
  2. 2.
    Qi, R., Lu, L.: Energy consumption and optimization of internally cooled/heated liquid desiccant air-conditioning system: a case study in Hong Kong. Energy 73, 801–808 (2014)CrossRefGoogle Scholar
  3. 3.
    Zhang, T., Liu, X., Zhang, L., Jiang, J., Zhou, M., Jiang, Y.: Performance analysis of the air-conditioning system in Xi’an Xianyang International Airport. Energy Build. 59, 11–20 (2013)CrossRefGoogle Scholar
  4. 4.
    Lun, W., Li, K., Liu, B., Zhang, H., Yang, Y., Yang, C.: Experimental analysis of a novel internally-cooled dehumidifier with self-cooled liquid desiccant. Build. Environ. 141, 117–126 (2018).  https://doi.org/10.1016/j.buildenv.2018.05.055CrossRefGoogle Scholar
  5. 5.
    Zhang, T., Liu, X., Jiang, J., Chang, X., Jiang, Y.: Experimental analysis of an internally-cooled liquid desiccant dehumidifier. Build. Environ. 63, 1–10 (2013).  https://doi.org/10.1016/j.buildenv.2013.01.007CrossRefGoogle Scholar
  6. 6.
    Gao, W., Shi, Y., Cheng, Y., Sun, W.: Experimental study on partially internally cooled dehumidification in liquid desiccant air conditioning system. Energy Build. 61, 202–209 (2013)CrossRefGoogle Scholar
  7. 7.
    Gommed, K., Grossman, G., Prieto, J., Ortiga, J., Coronas, A.: Experimental comparison between internally and externally cooled air-solution contactors. Sci. Technol. Built Environ. 21(3), 267–274 (2015)CrossRefGoogle Scholar
  8. 8.
    Yang, Z., Lin, B., Zhang, K., Lian, Z.: Experimental study on mass transfer performances of the ultrasonic atomization liquid desiccant dehumidification system. Energy Build. 93, 126–136 (2015).  https://doi.org/10.1016/j.enbuild.2015.02.035CrossRefGoogle Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  1. 1.Department of Civil and Energy Engineering, College of Environmental Science and EngineeringDonghua UniversityShanghaiChina
  2. 2.Department of ArchitectureShanghai Jiao Tong UniversityShanghaiChina

Personalised recommendations