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KSTAR PFC GN<SUB>2</SUB> BAKING SYSTEM 의 최적설계와 운전결과에 관한 연구
김상태(Kim Sang Tae),김영진(Kim Young Jin),정남용(Jung Nam Yong),임동석(Im Dong Seok),김광표(Kim Kwang Pyo),방은남(Bang Eun Nam),김경민(Kim Kyung Min),김양수(Kim yang Su),권면(Kwon Myeun),유성연(Yoo Seong Yeon) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10
PFC nitrogen gas (GN<SUB>2</SUB>) baking system is a closed-loop system and consists of a compressor (nitrogen gas), a electric heater, a pre-cooler (gas vs. gas), a cooler (gas vs. water), a vacuum pump, etc. The system has the following characteristics: 1)Because the compressor cannot be operated at 350℃, the cooler is installed at its suction pipe in order to keep its suction gas temperature below 90℃; 2) The high temperature nitrogen gas fed into the PFC source an energy from compression heat of the compressor and heat retrieved of the pre-cooler to reduce the heaters capacity and those become saving operational energy highly; 3) The heater power is regulated by the temperature of the heater outlet gas through feedback control. For the heating operation in the fourth campaign, the temperature of GN<SUB>2</SUB> supplied was raised to 300℃; PFC temperature reached 250℃. This paper describes the optimum design of PFC GN<SUB>2</SUB> baking system and its operating results.