• 대한설비공학회지:설비저널
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• 제29권7호
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• pp.28-35
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• 2000

LNG 냉열 이용은 일본초저온(주)의 냉장보관 사업의 에너지절감 (65%)형 초저온 (-55$^{\circ}C$) 대형냉장고로 일본 뿐만 아니라 세계적으로 최초의 냉장업체이다. 회사 건설시는 입지선정, 경제성검토, 기술성, 공해상의 검토 등을 거쳐 완성된 업체로써 시설규모는 냉장 20,000 M/T, 1일 LNG 공급량 90M/T으로 현재 가동중이며 대부분의 동결 및 냉장 품목은 참치(마구로)가 83%를 차지하고 기타가 17% 였다. 냉장고의 가동율은 75%로 매우 높은 편이였다, LNG식 냉동장치의 가장 큰 장점은 일반적인 냉동방식 전력비의 1/3 밖에 소요되지 않는다는 것이다. L$N_2$의 내열이용 업체는 근기냉열(주)은 오사카의 천북에 있으며, L$N_2$를 자가 생산하여 면류 생산공장으로 직송하고 동결제조 하여 품질의 고급화 및 위생식품을 제조 판매하고 있다. 규모는 년간 2,000만식을 생산하고 주 생산제품은 조리면 및 냉동우동 등이다. L$N_2$의 소비가격은 전기식 냉동기에 비하여 5~9배의 고액이 소요되는 것이 결점이라고 할 수 있다.

• 한국수소및신에너지학회논문집
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• 제31권3호
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• pp.302-306
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• 2020

In this study, computer simulation works using PRO/II with PROVISION V10.2 have been performed for a cascade refrigeration cycle using methane, ethylene and propane as refrigerants. LNG cold heat was also utilized in order to save the compression powers for the ethylene and propane refrigeration cycles. It was concluded that about 77% of compression power can be saved by using LNG cold heat through the exchanging heat with refrigerants. We could also know that the cold heat price contained in 1 ton of LNG is 16,155 won.

• 한국수소및신에너지학회논문집
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• 제31권3호
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• pp.322-327
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• 2020

In this work, a study for the reduction of the electric power consumption has been estimated in main air compressors in the air separation unit through cryogenic distillation columns with PRO/II with PROVISION V10.2 at AVEVA company. Both required LNG mass flow rate and cold heat contained in 1 ton of LNG were also predicted using Peng-Robinson equation of state with Twu's new alpha function. Through this work, we concluded that 32.33-48.69% of electric power could be saved by using LNG cold heat.

• 한국수소및신에너지학회논문집
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• 제29권4호
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• pp.357-362
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• 2018

In this study, computer simulation and optimization works have been performed for a refrigeration cycle using ammonia as a refrigerant and also how much power was saved when the liquefied natural gas cold heat is replaced for the refrigeration cycle. PRO/II with PROVISION release 10.0 from Schneider electric company was used, and Peng-Robinson equation of the state model was selected for the modeling of the refrigeration cycle and LNG cold heat utilization process.

• 한국수소및신에너지학회논문집
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• 제31권2호
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• pp.259-264
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• 2020

In this study, comparison study has been performed between two-stage compression and a vapor-recompression refrigeration cycle and a liquefaction using LNG cold heat. When using a first method using two-stage compression and a refrigeration cycle, at least three compressors are required, however when using LNG cold heat, no compressor is required since carbon dioxide can be pumped after condensing with the heat exchange with -160℃ of LNG. Through this study, we can save more than one hundred million KRW annually by using LNG cold heat instead of using gas compression and refrigeration cycle.

• 한국수소및신에너지학회논문집
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• 제30권2호
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• pp.188-192
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• 2019

Comparative studies between single- and two-stage expansion process using LNG cold heat have been performed for a closed Rankine power generation cycle. PRO/II with PROVISION release 10.0 from Schneider Electric Company was used, and the Peng-Robinson equation of state model with Twu's alpha function was selected for the modeling and optimization of the power generation cycle using LNG cold heat. In two-stage power generation cycle, 6.7% more power was obtained compared to that of single-stage power generation cycle through the optimization works.

• 한국수소및신에너지학회논문집
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• 제30권5호
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• pp.473-477
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• 2019

In this paper, cold heat price contained in the 1 ton/h of LNG has been evaluated using PRO/II with PROVISION release 10.2 from Aveva company when LNG is used to liquefy several refrigerants instead of using vapor recompression refrigeration cycle. Normal butane, R134a, NH3, R22, propane and propylene refrigerants were selected for the modeling of refrigeration cycle. It was concluded that LNG cold heat price was inversely proportional to the refrigerant supply temperature, even though LNG supply flow rate is not varied according to the refrigerant supply temperature.

• 한국수소및신에너지학회논문집
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• 제34권5호
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• pp.549-554
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• 2023

In this paper, three kinds of studies have been completed to obtain highly purified carbon dioxide having more than 7N purity as an electronic grade quality. PRO/II with PROVISION release January 2023 from AVEVA company was used, and Peng-Robinson equation of the state model with Twu's alpha function was selected for the modeling of the cryogenic distillation process. When using LN2 cold heat, we can obtain highest recovery of carbon dioxide as a bottom product for a cryogenic distillation column.

• 한국가스학회:학술대회논문집
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• 한국가스학회 2006년도 추계학술발표회 논문집
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• pp.221-232
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• 2006

• 한국가스학회지
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• 제16권6호
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• pp.136-142
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• 2012

터보팽창기를 이용한 폐압발전에서 전력생산량과 온도의 산출식의 열역학적 유도과정을 제시하였고, 전력생산량은 압력차가 아니라 압력비가 주요변수임을 밝혔다. 천연가스 폐압발전 인입부의 고압가스는 전기에너지(비용) 투입이 거의 없이 무상으로 얻어지는 에너지라는 사실을 보임으로써, 폐압이 지금까지는 별로 주목받지 못하였지만 새로운 청정에너지원 중의 하나임을 밝혔다. 공급가스 온도 보상을 위한 방법으로 팽창 후의 heating 방식을 택한다면, 전력생산과 더불어 냉열을 이용할 수 있고, 냉열이용량 만큼 heating 에너지를 줄일 수 있으므로 경제성을 배가시킬 수 있다.