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A Study on Polymer Electrolyte Membrane (PEM)-Based Electrolytic Air Dehumidification for Sub-Zero Environment

  • Tao Li
  • Ronghui QiEmail author
Conference paper
  • 220 Downloads
Part of the Environmental Science and Engineering book series (ESE)

Abstract

Electrolytic dehumidification with polymer electrolyte membrane (PEM) is a compact and effective independent humidity control method for refrigerators. To explore the performance of PEM-based dehumidification under sub-zero conditions, experiments were conducted at low temperatures of −10–0 °C. Results showed that this device could operate stably at temperatures above −8.5 °C. The moisture removal rate was 0.05–0.08 × 10−9 g/s, and the energy efficiency was 0.64–0.68 × 10−2 g/(J m2), respectively. It has also been found that the moisture removal rate and energy efficiency decreased with the decrease of absolute humidity in the air. Furthermore, the performance under sub-zero conditions was relatively low, which the dehumidification rate at −8.5 °C was only 1/6 of that at 25 °C. The possible reason is that water inside the PEM may be frost, hindering the proton transmission below 0 °C. Besides, the electrical conductivity also reduces due to the low temperature. This study proved that PEM-based dehumidification is a promising alternative for independent humidity control under low-temperature conditions.

Keywords

Electrolytic dehumidification Refrigerator Sub-zero environment Independent humidity control Experiments 

Nomenclature

m

Mass flow rate

t

Temperature

RH

Relative humidity

Moisture content

Subscripts

a

Air

A

Anode

In

Inlet

P

Power

w

Water

C

Cathode

Out

Outlet

Aarea

Membrane area

Notes

Acknowledgements

The project is supported by the National Key Research and Development Program (No. 2016YFB0901404), National Natural Science Foundation of China (51876067), the National Science Fund for Distinguished Young Scholars of Guangdong Province (2018B030306014). It is also supported by the Science and Technology Planning Project of Guangdong Province: Guangdong–Hong Kong Technology Cooperation Funding Scheme (TCFS), No.2017B050506005.

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Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  1. 1.Key Laboratory of Enhanced Heat Transfer and Energy Conservation of Education Ministry, School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhouChina

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