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Optimized Control Strategy for Hybrid Energy System
Kyungkyu Lee,Boguen An,Muhammad Wardi Hadi,Jaeho Choi,Yujin Song 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6
This paper proposes the hybrid energy system control strategy considering the State of Charge (SOC) of battery and the fuel consumption of diesel generator. The hybrid energy system is composed of diesel generator, PV unit, and Energy Storage System (ESS) with battery and supercapacitor. To optimize the fuel consumption of diesel generator it should be operating at the rated power based on the BSFC (Brake Specific Fuel Consumption). And the ESS has to compensate the change of required amount of the load. In this paper, it shows the PSiM modeling of each system and proposes the control strategy for improving the efficiency with considering the SOC of battery.
( Soojung Jin ),( You Na Oh ),( Yu Ri Son ),( Boguen Kwon ),( Jung-ha Park ),( Min Jeong Gang ),( Byung Woo Kim ),( Hyun Ju Kwon ) 한국미생물 · 생명공학회 2022 Journal of microbiology and biotechnology Vol.32 No.2
Since the skin covers most surfaces of the body, it is susceptible to damage, which can be fatal depending on the degree of injury to the skin because it defends against external attack and protects internal structures. Various types of artificial skin are being studied for transplantation to repair damaged skin, and recently, the production of replaceable skin using three-dimensional (3D) bioprinting technology has also been investigated. In this study, skin tissue was produced using a 3D bioprinter with human skin cell lines and cells extracted from mouse skin, and the printing conditions were optimized. Gelatin was used as a bioink, and fibrinogen and alginate were used for tissue hardening after printing. Printed skin tissue maintained a survival rate of 90% or more when cultured for 14 days. Culture conditions were established using 8 mM calcium chloride treatment and the skin tissue was exposed to air to optimize epidermal cell differentiation. The skin tissue was cultured for 14 days after differentiation induction by this optimized culture method, and immunofluorescent staining was performed using epidermal cell differentiation markers to investigate whether the epidermal cells had differentiated. After differentiation, loricrin, which is normally found in terminally differentiated epidermal cells, was observed in the cells at the tip of the epidermal layer, and cytokeratin 14 was expressed in the lower cells of the epidermis layer. Collectively, this study may provide optimized conditions for bioprinting and keratinization for three-dimensional skin production.