Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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A Study on the Effect of Non-Clean Water Treatment Chemicals for R-134a Turbo-Chiller Condensers

R-134a 터보냉동기 응축기의 무세정 수처리 약품 효과 연구

  • JUNG, DA-WOON (School of Mechanical Engineering & IEDT, Kyungpook National University) ;
  • KIM, MAN-HOE (School of Mechanical Engineering & IEDT, Kyungpook National University)
  • 정다운 (경북대학교 기계공학부/공학설계연구소) ;
  • 김만회 (경북대학교 기계공학부/공학설계연구소)
  • Received : 2022.07.04
  • Accepted : 2022.07.29
  • Published : 2022.08.30
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Abstract

This paper presents an experimental study on the main management factors of the condenser contamination such as fouling and corrosion for the R-134a turbo-chiller to save energy, reduce corrosion rates, and reduce maintenance costs through the application of condenser non-cleaning water treatment chemical. The series of experiment is conducted using combining oxidative microbial sterilizers, non-oxidizing microbial sterilizers, and anti-corrosion agents. The leaving temperature difference and corrosion rates for three different combination of chemicals are collected and analyzed. The experimental results show that the cost reduction (4,066,000 Won/year) of the disinfectant (FT-830) can be achieved by adding the oxidative disinfectant (NaOCl) and the non-oxidizing disinfectant (NX-1116). The LTD value is maintained at 1.9℃, and the corrosion rates of copper and carbon steel specimens are 0.07 mpy and 1.61 mpy, respectively.

Keywords

Acknowledgement

이 논문은 2020년도 (주)엘지디스플레이 구미공장의 설비 및 모니터링 시스템을 활용하여 연구하였으며, 실험 장치의 제공과 무세관 수처리 프로그램 자료를 제공한 관계자들에게 감사드린다.

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