This page has only limited features, please log in for full access.
Ensuring energy supply security has become one of the most important purposes for many countries. To make the strategies for ensuring the energy supply security of a country, it is essential to quantitatively assess the security. This paper aims to present a methodology to evaluate the energy supply security of a country by using different indices of energy dependence and energy diversity, which have been raised as two main paradigms of energy supply security. This study also proposes two indices reflecting the correlation between a country’s energy diversity and energy import dependence to evaluate its energy supply security based on easily accessible data. The presented methodology and indices were applied to the evaluation of the primary energy supply security of Korea from 1991 to 2018. The results show that a country highly dependent on energy imports is not evaluated as secure enough in terms of energy supply even if it obtains higher energy diversity. This finding supports the importance of the correlation of energy dependence and energy diversity of a country to ensure its energy supply security. This approach could be further adapted to other countries and help them to make their energy policy and strategies.
HerIe Park; Sungwoo Bae. Quantitative Assessment of Energy Supply Security: Korea Case Study. Sustainability 2021, 13, 1854 .
AMA StyleHerIe Park, Sungwoo Bae. Quantitative Assessment of Energy Supply Security: Korea Case Study. Sustainability. 2021; 13 (4):1854.
Chicago/Turabian StyleHerIe Park; Sungwoo Bae. 2021. "Quantitative Assessment of Energy Supply Security: Korea Case Study." Sustainability 13, no. 4: 1854.
This study presents the surface discharge characteristics of insulating gases, including sulfur hexafluoride (SF6), dry air, and N2, under a non-uniform field. Surface discharge experiments were conducted, with the gas pressure ranging from 0.1 to 0.6 MPa, on samples of epoxy dielectrics under an AC voltage. The experimental results showed that the surface insulation performance significantly improved in insulating gases possessing electronegative gases, such as SF6 and dry air. Surface flashover voltages of SF6 were saturated with an increasing pressure, compared to dry air and N2. The surface discharge mechanism is proposed to explain the improvement and saturation of dielectric characteristics of the electronegative gas in complex dielectric insulations, as well as its influence on the surface flashover voltage. As an application, an insulation design method is discussed with regards to replacing SF6 gas in high-voltage power equipment based on the knowledge of the physics behind gas discharge.
HerIe Park; Dong-Young Lim; Sungwoo Bae. Surface Discharge Mechanism on Epoxy Resin in Electronegative Gases and Its Application. Applied Sciences 2020, 10, 6673 .
AMA StyleHerIe Park, Dong-Young Lim, Sungwoo Bae. Surface Discharge Mechanism on Epoxy Resin in Electronegative Gases and Its Application. Applied Sciences. 2020; 10 (19):6673.
Chicago/Turabian StyleHerIe Park; Dong-Young Lim; Sungwoo Bae. 2020. "Surface Discharge Mechanism on Epoxy Resin in Electronegative Gases and Its Application." Applied Sciences 10, no. 19: 6673.
The residential building sector is encouraged to participate in demand response (DR) programs owing to its flexible and effective energy resources during peak hours with the help of a home energy management system (HEMS). Although the HEMS contributes to reducing energy consumption of the building and the participation of occupants in energy saving programs, unwanted interruptions and strict guidance from the system cause inconvenience to the occupants further leading to their limited participation in the DR programs. This paper presents a human comfort-based control approach for home energy management to promote the DR participation of households. Heating and lighting systems were chosen to be controlled by human comfort factors such as thermal comfort and visual comfort. Case studies were conducted to validate the proposed approach. The results showed that the proposed approach could effectively reduce the energy consumption during the DR period and improve the occupants’ comfort.
HerIe Park. Human Comfort-Based-Home Energy Management for Demand Response Participation. Energies 2020, 13, 2463 .
AMA StyleHerIe Park. Human Comfort-Based-Home Energy Management for Demand Response Participation. Energies. 2020; 13 (10):2463.
Chicago/Turabian StyleHerIe Park. 2020. "Human Comfort-Based-Home Energy Management for Demand Response Participation." Energies 13, no. 10: 2463.