• Title/Summary/Keyword: storage facility

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Development of the Control System for Fast-Responding Frequency Regulation in Power Systems using Large-Scale Energy Storage Systems

  • Lim, Geon-Pyo;Park, Chan-Wook;Labios, Remund;Yoon, Yong-Beom
    • KEPCO Journal on Electric Power and Energy
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    • v.1 no.1
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    • pp.9-13
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    • 2015
  • Energy storage systems (ESS) can be used to provide frequency regulation services in a power system to replace traditional frequency regulation power plants. Battery ESS, in particular, can provide "fast-responding frequency regulation," wherein the facility can respond immediately and accurately to the frequency regulation signal sent by the system operator. This paper presents the development and the trial run results of a frequency regulation control system that uses large-scale ESS for use in a large power system. The control system was developed initially for the 4 MW ESS demonstration facility in Jocheon Jeju Island, and was further developed for use in the 28 MW ESS facility at the Seo-Anseong substation and the 24 MW ESS facility at the Shin-Yongin substation to provide frequency regulation services within mainland Korea. The ESS facility in Seo-Anseong substation responds to a sudden drop in frequency via governor-free control, while the ESS facility in Shin-Yongin responds via automatic generator control (AGC).

A Study on the Improvement of Storage Space in the Apartment Housing (아파트 수납공간 개선 방안 연구)

  • Park, Ki-Bum;Kim, Soo-Am
    • Proceedings of the Korean Institute of Interior Design Conference
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    • 2007.11a
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    • pp.63-66
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    • 2007
  • The shortage of storage space in the apartment housing has been chronic problem in the Korean housing history. So far many studies on the storage space focused on the enlargement of indoor storage space but these studies could not be a complete solution. To solve problem, this study analyzed the case which installed exterior storage space and the regulations. The followings are several findings. The exterior storage space should be a essential element in the apartment planning and should be included as a community facility. The standards on the size, safety, facility, and management of storage space should be enacted.

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A Study on the Temporary Storage Facility for Mitigating the Leakage Accident (누출 사고 완화를 위한 임시 저장 시설에 관한 연구)

  • Song, Hyeon Oh;Lee, Chang Jun
    • Journal of the Korean Society of Safety
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    • v.35 no.3
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    • pp.1-5
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    • 2020
  • The leakage accident from a storage tank in an oil refinery plant occurred in April 2014 and the total loss is KRW 18 billion. This accident has prompted many companies to develop their own mitigation system to minimize the loss of the leakage accident. The aim of this study is to design the temporary storage facility system for dealing with leakage accidents. The basic concept of this system is that the leakage fluid of a hazardous material flows into a temporary storage tank and this is transferred to a spare tank by a pump as avoiding the overflow of a temporary storage tank. In order to design this system, the leakage velocity and quantity according to time series should be evaluated. In addition, a proper pump capacity should be determined to avoid repeating the pump switching on and off frequently. In this study, the benzene tank is selected to verify the efficacy of this system. This study can play a critical role to provide a guideline for designing a new system.

Neutron dose rate analysis of the new CONSTOR® storage cask for the RBMK-1500 spent nuclear fuel

  • Narkunas, Ernestas;Smaizys, Arturas;Poskas, Povilas;Naumov, Valerij;Ekaterinichev, Dmitrij
    • Nuclear Engineering and Technology
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    • v.53 no.6
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    • pp.1869-1877
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    • 2021
  • This paper presents the neutron dose rate analysis of the new CONSTOR® RBMK-1500/M2 storage cask intended for the spent nuclear fuel storage at Ignalina Nuclear Power Plant in Lithuania. These casks are designed to be stored in a new "closed" type interim storage facility, with the capacity to store up to 202 CONSTOR® RBMK-1500/M2 casks. In 2016 y, the "hot trials" of this new facility were conducted and 10 CONSTOR® RBMK-1500/M2 casks loaded with the spent nuclear fuel were transported to the dedicated storage places in this facility. During "hot trials", the dose rate measurements of the CONSTOR® RBMK-1500/M2 casks were performed as the dose rate is one of the critical parameter to control and it must be below design (and safety) criteria. Therefore, having the actual data of the spent nuclear fuel characteristics, the neutron dose rate modeling of the CONSTOR® RBMK-1500/M2 cask loaded with this particular fuel was also performed. Neutron dose rate modeling was performed using MCNP 5 computer code with very detailed geometrical representation of the cask and the fuel. The obtained modeling results were compared with the measurement results and it was revealed, that modeling results are generally in good agreement with the measurements.

The Development and Management of a Cooperative Storage Facility for Academic Libraries in Korea (우리나라 대학도서관 공동보존서고의 구축 및 운영에 관한 연구)

  • Yoon, Cheong-Ok;Shim, Kyung;Kwack, Dong-Chul
    • Journal of Korean Library and Information Science Society
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    • v.38 no.3
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    • pp.25-51
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    • 2007
  • The purpose of this study is to suggest the characteristics of a cooperative storage facility for academic libraries in Korea. For this facility, discussed are how to select a site, build physical facilities, recruit participating organizations, prepare for selection criteria and ownership of resources, confirm service policies, and implement a integrated library management and access system. It is emphasized that a cooperative storage facility for academic libraries in Korea should ensure the optimum use of space on campus, preserve "the last copy" which is not frequently used, but still has scholarly values, and extend the effective and efficient resource sharing among participating libraries.

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The Effect of Storage Method and Duration on the Physicochemical Characteristics and Consumer Acceptance of Kimchi (저장 방법 및 기간을 달리한 김장 김치의 이화학적 특성 및 소비자 기호도)

  • Kim, Hee-Sup
    • Journal of the Korean Society of Food Culture
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    • v.17 no.5
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    • pp.638-645
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    • 2002
  • The purpose of this study is to evaluate the quality characteristics and consumer acceptance of the Kimchi affected by the storage method and the duration. The characteristics of Kimchi fermented and stored in the traditional method, such as cave facility or pit storage on the shore were compared to the Kimchi which was stored in the Kimchi refrigerator using the physicochemical and sensory evaluation. The quality of Kimchi stored by the Kimchi refrigerator was most acceptable with 3 month storage, while that of Kimchi stored by the storage facility under the ground on the shore was 1 month storage. Shelf life of Kimchi was extended up to 5 month stored by Kimchi refrigerator, and 3 month for the Kimchi stored under the ground on the shore.

Comparative analysis of the minimum capacity of an ice-on-coil thermal storage system for various operation strategies (관외 빙착형 빙축열시스템의 운전방식에 따른 최소용량 비교)

  • 이대영;정성훈;강병하
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.11 no.3
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    • pp.401-413
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    • 1999
  • An ice storage cooling facility with cooling capacity of 150㎾ has been constructed for the purpose of developing optimal design and control strategy for an ice storage system. As the first step to this purpose, a computer program has been developed to simulate the operation of the ice storage system and examined precisely by comparing the results with those measured from the test facility. With the simulation program verified from the comparison, a design procedure has been developed to determine the minimum capacity required for each operation strategy available commercially. It is shown that the minimum sizes of the chiller and the storage tank are strongly dependent on the control strategy, i.e., chiller priority or storage priority, but less affected by the arrangement method, i.e., chiller upstream or chiller downstream.

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A Study on the Structure and Function of the Underground Storage Facility in Baekje (백제 지하저장시설(地下貯藏施設)의 구조와 기능에 대한 검토)

  • Shin, Jong-Kuk
    • Korean Journal of Heritage: History & Science
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    • v.38
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    • pp.129-156
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    • 2005
  • Increasing discovery cases of underground storage facilities made of earth, wood, or stone are being reported from the recent excavation survey of the Baekje relics. Accordingly, the purpose of this study is to examine the structure and function of the underground storage facilities of Baekje following a classification made by the type and building method as follows: plask shape, wooden box shape, and stone box shape. The plask shape storage is the most representative underground storage of Baekje that has been found in numerous relics more than 600 sets around Hangang(Han River) and Geumgang(Geum River) from the Hansung period to Sabi period in Baekje Dynasty. It is a historical artefact as a part of the unique storage culture of Baekje around Hangang and Geumgang from the 3rd to 7th Century. Considering its structure and the example of Chinese one, it might had been used for a long-term storage of grains and various other items including earth wares. The storage facility in wooden box shape and stone box shape are found mostly in the relics Of Sabi period. Thus it might had taken some functions of the storage in traditional pouch shape which had decreased after the 6th Century. In particular, the wooden box shape and stone box shape storage required enormous labor force to build owing to their structure and building method. Thus, they were considered to had been used for official purposes in province fortress and citadel artefact. The wooden box shape storage facility is classified into flat rectangular type and square type based on the structure, and into Gagu type(架構式) and Juheol type(柱穴式) based on the building method. It might had been decided according to the geography and geological feature of the place where the storage was to be built. Considering the examples of Gwanbuk-ri relics and Weolpyong-dong relics, the wooden box shape storage facility might had been used for various items depending on the needs, including foods such as fruits and essential provisions at the military base. Considering the long-term food storage, the examples in Japan, and the functional characteristics of the underground storage facility, there is a possibility that the wooden and stone box shape storage facilities had been built so as to safely store important items in case of fire. This study is only a rudimentary examination for the storage facility in Baekje. Thus further studies are to be made specifically and comprehensively on the comparison with other regions, distribution pattern, discovered relics and artefacts, and functions.

Study for Reducing Safety Distance by Installing Ammunition Storage Facility in Underground (탄약저장시설 지하화에 따른 안전거리 축소방안 연구)

  • Park, Sangwoo;Jun, Jonghoon;Choi, Hangseok;Park, Young-Jun
    • Journal of the Korea Institute of Building Construction
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    • v.20 no.3
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    • pp.253-260
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    • 2020
  • With increasing interest in an underground-type ammunition storage facility, several design results have been provided recently. However, since not only experts in the tunnel but also military persons in charge of ammunition have not fully understood the safety distance standard, reliable design results are not being produced. In this study, the effective design method of an underground-type ammunition storage facility was provided by analyzing the current safety distance standard. First, the critical safety distances that dominate the size of construction site for underground-type ammunition storage facilities were evaluated, which are the layout of chambers and the configuration of the entrances. Then, the decreasing effect of inter-chamber distance was studied according to the rock type and the storage density of ammunition. In addition, the method of designing tunnels with parallel lines and two-floors was considered for arranging more chambers while complying with the safety distance standards. In particular, numerical simulations were carried out to determine the satisfaction of the safety distance standards when an underground-type ammunition storage facility is composed of two-floor and the decreasing effect of inter-chamber distance according to the inner explosive pressure reduction. Finally, the method to adjust the size of entrances and the path of pressure were studied for decreasing the safety distance at the entrance.

Quantification of Flood Reduction Effect of Small Stormwater Detention Facilities by NRCS Curve Number (유출곡선지수를 이용한 소규모 저류시설의 유출저감효과 정량화)

  • Yoo, Chul-Sang;Kim, Kyoung-Jun;Park, Min-Kyu;Yoon, Jeong-Su
    • Journal of the Korean Society of Hazard Mitigation
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    • v.10 no.3
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    • pp.109-118
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    • 2010
  • This study quantified the flood reduction effect of small stormwater detention facilities by the NRCS curve number. The modified rational equation was used to calculate the inflow volume into the detention facilities. The NRCS curve number in the cases w/ and w/o storage facility was calculated with respect to the rainfall characteristics(rainfall frequency, duration) and the size of storage facilities. Finally, diagrams showing the curve number reduction rate versus the size of storage facility were developed. The diagrams can be used to evaluate the flood reduction effect of storage facility reasonably and efficiently when estimating the optimal location and size of storage facility. The results based on the methodology propsed in this study were also compared with those of previous study for their validation.