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육상 수조식 양식장의 해수 열원 히트펌프 시스템 적용을 위한 열부하 분석
윤민기,김태훈,정석권,Min-Gi YOON,Tae-Hoon KIM,Seok-Kwon JEONG 한국수산해양기술학회 2023 수산해양기술연구 Vol.59 No.2
This study deals with the maximum thermal load analysis and optimal capacity determination method of tank culture system for applying seawater source heat pump to save energy and realize zero energy. The location of the fish farm was divided into four sea areas, and the heat load in summer and winter was analyzed, respectively. In addition, two representative methods, the flow-through aquaculture system and the recirculation aquaculture system were reviewed as water treatment methods for fish farms. In addition, the concept of the exchange rate was introduced to obtain the maximum heat load of the fish farms. Finally, power consumption for heat pumps was analyzed in the view point of sea areas, tank capacity, and exchange rate based on the calculated maximum thermal load.
윤민기(Min Gi Yoon),정석권(Seok Kwon Jeong) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.11
Variable speed refrigeration systems (VSRS) are mostly composed of multiple input/output systems with multiple state variables. In particular, since input/output variables and state variables have various constraints in an actual system, it is not easy to design an optimal control considering them. Model predictive control (MPC) has recently been attracting attention in process control due to the advantage of being able to optimally control a MIMO system having a number of constraints. Above all, MPC exhibits excellent control performance because it predicts future outputs reflecting constraints at the present time and determines the optimal control input. In this study, we apply MPC to VSRS and examine their effectiveness through Matlab simulation. In the simulation, to confirm MPC validity, control performance of MPC considered with early reflection of constraints is compared with conventional PI control satisfying constraints through saturation.