• Title/Summary/Keyword: Cold chain system

Search Result 91, Processing Time 0.027 seconds

Manufacture of Water-Resistant Corrugated Board Boxes for Agricultural Products in the Cold Chain System(II). -Application Methods of Chemicals for Improving Water and Moisture Resistance of Corrugated Boards- (농산물 저온유통용 내수 골판지 상자의 제조(제2보) - 골판지의 내수 및 내습성 향상을 위한 약품 적용 방법 -)

  • 조중연;민춘기;신준섭
    • Journal of Korea Technical Association of The Pulp and Paper Industry
    • /
    • v.36 no.2
    • /
    • pp.60-69
    • /
    • 2004
  • Application methods of chemicals were investigated to minimize strength reduction of corrugated boards under the high humidity environment encountered in the cold chain system. Starch insolubilizers were introduced in the starch solution preparation of the Stein hall method and their insolubilization effect of starch binder were estimated. The performance of water repellent agents(WRA) and moisture proof agents(MPA) were evaluated in terms of water and moisture resistance. And effects of the combination of the chemicals and the coating method were also examined. Addition of the polyamine polyamide insolubilizer to the main part in the Stein hall process improved the binding force and water resistance of starch, which contributed to minimize the strength reduction of paper under the high humidity environment. AZC and Glyoxal type insolubilizers could not be used in the experiment due to an excessively increased viscosity of starch solution and the poor stability. Conventional WRA treatment to the base paper enhanced water and moisture resistance very slightly even though water repellency of the paper reached R10 by the treatment. MPA showed excellent performance than WRA not only in water and moisture resistance but in water repellency. Double coating on paper with MPA was more effective than the single coating at the same coating weight. A newly developed MPA showed excellent performance and runnability only by a single coating instead of a double coating.

Changes of the Physical Properties of Corrugated Fiberboard Boxes for Fruit and Vegetable Packaging by Preservation Temperature and Relative Humidity (과채류 포장용 골판지 상자의 저장온도와 습도에 따른 물리적 특성 변화)

  • Lee, Myung-Hoon;Cho, Jung-Yeon;Shin, Jun-Seop
    • Journal of Korea Technical Association of The Pulp and Paper Industry
    • /
    • v.34 no.1
    • /
    • pp.46-53
    • /
    • 2002
  • This study was carried out to analyze the effects of preservation temperature and relative humidity to the physical properties of corrugated fiberboard boxes for fruit and vegetable packaging. The preservation temperature did not affect severely to physical properties of corrugated fiber-board. Relative humidity was a major cause of corrugated fiberboard box quality deterioration. The burst and compressive strengths of experimental boxes measured with Mullen high pressure tester and tong crush tester were decreased gradually as relative humidity increased from 55% to 75%. But, the strength properties slightly decreased relative humidity at 75% or higher. This tendency was the greater for single wall (SW) corrugated fiberboard box than that for double wall (DW). It is suggested that development of the water-resistant corrugated fiberboard and box be needed that can be used under the condition of low temperature and high moisture content, which are being employed in the cold chain system.

Technological Review of Icing & Frozen Industry in Korea ("우리나라 제빙 냉동업의 기술적 리뷰")

  • Park Hi-Yul
    • Journal of the Korean Professional Engineers Association
    • /
    • v.12 no.3
    • /
    • pp.18-22
    • /
    • 1979
  • "In summary, the freezing facilitty manufacturing industry has a bright prospects for further development. So followings are recommended: 1) The import restriction policy should be continued to expand the demand for the 10callT manufactured facilities, 2) Training of local people and import of advanced technologies should be encouraged 3) The capacities of the local manufacturing industry should be expanded to meet the: increasing demand for the facilities, 4) Further incentives should be affered to the freezing & cold storage sector for the repla¬cement of the worm-out facilities 5) The marketing channel of marine products should be reorganized into ""cold-chain system"" by providing a legislative supports."

  • PDF

On the Design of Power Supply System for Freight Train Reefer Container Based on Simulation

  • Kim, Joouk;Hwang, Sunwoo;Lee, Jae-Bum;Hwang, Jaemin;Chae, Uri
    • International Journal of Internet, Broadcasting and Communication
    • /
    • v.14 no.3
    • /
    • pp.249-257
    • /
    • 2022
  • In recent years, if we order food by easily accessing the online market with our smartphone, we can receive the product in a fresh state at dawn the next day. Cold chain is an industry that can create high added value because it has both the characteristics of general logistics and sensitivity to temperature. Based on the electrical specifications derived from the reefer container capacity requirement investigation, we proved that power supply to up to 33 reefer containers can be made by using three additional auxiliary power supplies which are applied for freight trains in Korea. In this paper, we conducted a research on a design of power supply system for freight train reefer container based on simulation as a basic research necessary for low-temperature distribution and cold chain construction based on the reefer container railroad. Consequently, the simulation was conducted using the three-phase inverter diagram in PSIM and the SVPWM (3-harmonic injection method) control technique, and it was verified that the required power voltage was satisfied with 622Vdc, which is lower than the input voltage of general SPWM of 718Vdc. The details of this paper could be used as a foundational study for constructing cold chains based on a reefer container dedicated to freight trains in the future.

Cold Storage Management System using RFID Deployment Simulator for Optimized Business Process (최적화된 비즈니스 프로세스를 위한 RFID 배치 시뮬레이터 기반의 냉동창고 관리 시스템)

  • Baek, Sun-Jae;Moon, Mi-Kyeong
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.14 no.6
    • /
    • pp.1453-1459
    • /
    • 2010
  • Recently, the aim of cold storage warehouse is not only to provide preservation of the quality of perishable foods but also to use state-of-the-art information systems to rapidly move products across the cold chain. An RFID (Radio Frequency Identification) is an automatic identification method that detects signals from mobile objects, and tracks and traces movement of the objects. RFID can be used to turn a cold storage warehouses into a real-time system. In this paper, we develop an cold storage management system to support the optimized business processes with RFID system. First of all, business processes in the cold storage warehouse are analyzed. Then design factors which should be considered for incorporating RFID are defined. Design values which set to the design factors can be extracted from using RFID deployment simulator. as a result, the design values make RFID to be efficiently integrated to existing business processes.

Bacterial community comparison revealed by metagenomic analysis and physicochemical properties of eastern little tuna (Euthynnus affinis) with storage temperature differences

  • Asadatun Abdullah;Rahadian Pratama;Tati Nurhayati;Windy Sibuea;Sabila Diana Ahmad Sauqi
    • Fisheries and Aquatic Sciences
    • /
    • v.26 no.10
    • /
    • pp.593-604
    • /
    • 2023
  • Post-harvest handling and hygienic level of aquatic products significantly affect the quality and level of safety. Cold chain control is one of the determining factors for the quality of fish and the bacterial community that grows on the fish. Identification of spoilage bacteria and pathogens in aquatic products must be made because it will determine the physical and chemical quality. A molecular identification method with high sensitivity is the solution. This study aims to identify the quality of fish and bacterial communities that grow. The research procedures included sample collection, pH measurement, drip loss measurement, transportation and cold storage treatment, DNA extraction, DNA sequencing, sequence analysis, and bioinformatics analysis. The conclusion obtained from this study is that the simulation of the cold chain system applied to eastern little tuna does not significantly affect changes in the water activity value, pH, and drip loss. The insignificant change indicates that the eastern little tuna samples are still in good quality. The bioinformatics analysis showed the highest diversity and abundance of the bacterial community came from the Gammaproteobacterial class.

A Reliability Redundancy Optimization Problem with Continuous Time Absorbing Markov Chain (연속시간 흡수 마코프체인을 활용한 신뢰도 중복 최적화 문제)

  • Kim, Gak-Gyu;Baek, Seungwon;Yoon, Bong-Kyu
    • Journal of Korean Institute of Industrial Engineers
    • /
    • v.39 no.4
    • /
    • pp.290-297
    • /
    • 2013
  • The increasing level of operation in high-tech industry is likely to require ever more complex structure in reliability problem. Furthermore, system failures are more significant on society as a whole than ever before. Reliability redundancy optimization problem (RROP) plays a important role in the designing and analyzing the complex system. RROP involves selection of components with multiple choices and redundancy levels for maximizing system reliability with constraints such as cost, weight, etc. Meanwhile, previous works on RROP dealt with system with perfect failure detection, which gave at most a good solution. However, we studied RROP with imperfect failure detection and switching. Using absorbing Markov Chain, we present not a good solution but the optimal one. In this study, the optimal system configuration is designed with warm and cold-standby redundancy for k-out-of-n system in terms of MTTF that is one of the performance measures of reliability.

Effect of Relative Humidity and Temperature on the Compression Strength of Corrugated Boxes on Distribution Channel (유통중 온습도 변화에 따른 골판지 상자의 압축강도에 대한 연구)

  • 이명훈;김종경
    • Journal of Korea Technical Association of The Pulp and Paper Industry
    • /
    • v.35 no.2
    • /
    • pp.33-38
    • /
    • 2003
  • In order to design the high strength corrugated fiberboard containers for agricultural products that can be used for the cold chain system, a large number of individual boxes were placed in various humidity environments at two different temperature of 5 and $20^{\circ}C$. The results indicated that temperature changes do not effect on physical strength of corrugated fiberboard containers as much as humidity changes did. The main conclusion from this study was that compression strength of corrugated fiberboard containers dropped significantly at high humidity condition, but the rates varied depending on the number of walls, temperature, and perimeter of containers. The packaging designer must consider the corrugated fiberboard boxes are also greatly affected by dimensional variations such as the length versus width ratio. Based on this study, water-resistant board would not be necessary if the ambient relative humidity does not reach to a critical point, 85 percent in the cold chain system. However, the designer must count for the unexpected fluctuation of rotative humidity resulting in severe loss of the compression strength of corrugated fiberboard container.

Establishment of Effective Freshness Indicators for Seafood During Room-Temperature Distribution Using Commercial Cold Packs and Styrofoam Boxes (시판 보냉팩 및 스티로폼 박스 상온 유통시 효율적인 수산물 선도지표 설정)

  • Lee, Ji Un;Heu, Min Soo;Lee, Jung-Suck
    • Korean Journal of Fisheries and Aquatic Sciences
    • /
    • v.55 no.5
    • /
    • pp.670-680
    • /
    • 2022
  • Owing to the lack of a cold-chain distribution system, most seafood is generally distributed under room temperature conditions. However the degradation of freshness during the distribution process can lead to disputes between sellers and consumers. The most widely used method for low-temperature distribution for seafood includes packaging it with styrofoam boxes and cold packs. In this study, vacuum-packed frozen fillets of four fish species of [white meat (Paralichthys olivaceus and Sebastes schlegelii) and red meat (Scomber japonicus and Scomberomorus niphonius)] were placed in styrofoam boxes with cold packs. Thereafter, changes in chemical (including pH, volatile basic nitrogen, and trimethylamine), physical (odor intensity, hardness, and chewiness), and microbial (viable cell count) characteristics of the fillets were measured during storage at 25℃. To identify the suitable method of determining freshness during the room-temperature distribution, several factors were considered, which included significant difference verification, correlation coefficients, and economic efficiency (experimental cost and time). Volatile basic nitrogen, pH, odor intensity, and viable cell count are the most rapid and accurate freshness indicators for determining freshness of frozen fish fillets during.

On the Derivation of Safety Requirements and Specifications based Integrated System Operation Scenario for the Development of Unmanned Courier Storage Device Platform in Urban Areas

  • Lee, Sang Min;Park, Jae Min;Kim, Joo Uk;Kim, Young Min
    • International Journal of Internet, Broadcasting and Communication
    • /
    • v.13 no.4
    • /
    • pp.103-111
    • /
    • 2021
  • In modern society, digital lifestyles are spreading to minimize contact with people and to receive contactless information. The spread trend has established an unmanned distribution system in which transactions through contactless technologies such as kiosks and chatbots are activated in face-to-face transactions with sellers and consumers. In order to streamline logistics supply worldwide, digital new deal based joint logistics hubs, unmanned courier storage platforms, and fresh logistics based last mile services have been developed into unmanned logistics systems, focusing on the intelligent logistics system automation process. Unmanned courier storage system installed in urban areas and home to daily logistics where volume is concentrated are provided with fresh logistics services through cold chain and receiving freights in contactless environments. Development is also underway to minimize safety accidents caused by courier services, such as managing various information based on the integrated control system. This paper defines the concept of integrated operation for the development of a platform for contactless unmanned courier storage device developed into next-generation logistics system. In addition, we intend to develop systems engineering-based output for deriving safety requirements and specifications by identifying risk sources that may occur in the operational scenario. Therefore, the goal is to establish a foundation for safety and reliability between interfaces of logistics systems to be installed in apartment and subway station environments that want to provide unmanned logistics services to various consumers.