Global population growth and industrial development are leading to water shortages, and water supplies from surface and groundwater sources are facing serious challenges. Many countries are projected to experience water shortages by 2025. More than 50% of these countries will face water resource depletion, and Korea is also expected to face water shortages, necessitating the development of water supply measures. This study explores the application of refrigeration technology to address this water shortage. It explores a small-scale seawater desalination system that utilizes the phenomenon of freshwater contained in seawater accumulating on the surface of a brine-cooled drum-type evaporator. This system exploits the phenomenon of freshwater contained in brine freezing on the low-temperature drum surface. Experiments were conducted to determine the amount of freshwater captured by varying the brine temperature entering a brine-cooled drum-type ice maker and the gap between the blades used to cut the frozen ice. When tested using seawater as the base, it was found that when the circulating brine temperature in the drum-type ice maker was -30℃ and the gap between the drum-type ice maker and the cutting blade was 1 mm, the salinity was removed by about 95%, and about 2.28 liters of fresh water could be produced per hour. It was also found that it was easy to install for small-scale seawater desalination and could be used with a low power capacity of about 2.3 kW.

무삼투압차 역삼투압(Δπ= 0)은 KAIST H. N. Chang 명예교수가 2013년 발명, 2014년 미국 특허 출원, 2018년 특 허 취득(US 9,950,297) 해수담수화기술. Chang 등의 RO 기술은 삼투압 조정조와 저압 역삼투압의 2 챔버로 구성. Chang 등은 소금물을 비롯한 모든 수용액은 물과 용질(소금)로 완전 분리 가능 주장. 삼투압차 조정조, 저압 역삼투압조 2 챔버로 구성됨. 고농도 용액의 삼투압은 1908년 미국화학회지 출간된 MIT G. N. Lewis식 이용. 두 번째 특허(US 10,953,3367)에서 RO가 10~12 bar 저 삼투압차 수행 가능 증명. 세 번째 특허(Korea 10-2322755, 해외 출원 중) Singularity ZERO 활용하면 기존 RO 에 비해 물은 50% 추가, 막 면적은 1/3, 이론에너지는 1/5, 동일 용량의 S-ZERO 기술은 기존 RO 건설비의 50~60%로 예측됨.