A pilot study of spiral-wound air gap membrane distillation process and its energy efficiency analysis

Chang Kyu Lee, Chansoo Park, Yun Chul Woo, June Seok Choi, Jong Oh Kim

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Brine disposal is a major drawback for seawater desalination. Membrane distillation (MD) is an emerging technology to treat a high saline water including brine disposal instead of reverse osmosis, multi-stage flash and multi-effect distillation. This study investigated a pilot scale of a spiral-wound air gap MD (AGMD) module and evaluated its efficiency. A pilot-scale AGMD module with design production capacity of 10 m3/d was operated. Experiments with varying flow velocity showed increasing trend of water vapor flux as flow velocity increases. The temperature is one of the significant points in maximizing water permeate vapor flux in MD. Increasing temperature from 65 °C to 75 °C in evaporator channel has increased flux from 0.59 to 1.15 L/m2/h. Under various conditions, specific thermal energy consumption (STEC) and gained output ratio (GOR) was used to analyze energy efficiency. The pilot plant showed high GOR value in spite of a limited heating and cooling source available at the site. The highest GOR achieved was 3.54 with STEC of 182.78 kWh/m3. This study provides an overview of operation experience and its data analysis related to temperature, concentration, flow rate and energy supply.

Original languageEnglish
Article number124696
JournalChemosphere
Volume239
DOIs
StatePublished - 2020 Jan 1

Fingerprint

Distillation
distillation
energy efficiency
Energy efficiency
Air
membrane
Membranes
Steam
Wounds and Injuries
air
Fluxes
Thermal energy
Flow velocity
flow velocity
Water vapor
Temperature
brine
water vapor
Energy utilization
Hot Temperature

Keywords

  • Air gap membrane distillation
  • Desalination
  • Gained output ratio (GOR)
  • Pilot plant
  • Specific thermal energy consumption (STEC)

Cite this

Lee, Chang Kyu ; Park, Chansoo ; Woo, Yun Chul ; Choi, June Seok ; Kim, Jong Oh. / A pilot study of spiral-wound air gap membrane distillation process and its energy efficiency analysis. In: Chemosphere. 2020 ; Vol. 239.
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abstract = "Brine disposal is a major drawback for seawater desalination. Membrane distillation (MD) is an emerging technology to treat a high saline water including brine disposal instead of reverse osmosis, multi-stage flash and multi-effect distillation. This study investigated a pilot scale of a spiral-wound air gap MD (AGMD) module and evaluated its efficiency. A pilot-scale AGMD module with design production capacity of 10 m3/d was operated. Experiments with varying flow velocity showed increasing trend of water vapor flux as flow velocity increases. The temperature is one of the significant points in maximizing water permeate vapor flux in MD. Increasing temperature from 65 °C to 75 °C in evaporator channel has increased flux from 0.59 to 1.15 L/m2/h. Under various conditions, specific thermal energy consumption (STEC) and gained output ratio (GOR) was used to analyze energy efficiency. The pilot plant showed high GOR value in spite of a limited heating and cooling source available at the site. The highest GOR achieved was 3.54 with STEC of 182.78 kWh/m3. This study provides an overview of operation experience and its data analysis related to temperature, concentration, flow rate and energy supply.",
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A pilot study of spiral-wound air gap membrane distillation process and its energy efficiency analysis. / Lee, Chang Kyu; Park, Chansoo; Woo, Yun Chul; Choi, June Seok; Kim, Jong Oh.

In: Chemosphere, Vol. 239, 124696, 01.01.2020.

Research output: Contribution to journalArticleResearchpeer-review

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