• Title/Summary/Keyword: Performance tests

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Calibration and maintenance of partial discharge measuring system in compliance to IEC 60270 (IEC 60270에 따른 부분방전 측정 시스템의 교정 및 유지관리 방법)

  • Kim, Ji-Hwan;Roh, Chang-Il;Kim, Geun-Yong;Park, Nam-Ok
    • Proceedings of the KIEE Conference
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    • 2009.07a
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    • pp.656_657
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    • 2009
  • IEC 60270 에서는 부분방전 시험회로와 측정 시스템에 관하여 기술하고 있을 뿐 아니라 측정 시스템의 교정 및 교정기(Calibrator) 와 측정 시스템의 유지 관리 방법에 대해서 규정하고 있다. 유지관리 방법으로는 type tests, routine tests, performance tests, performance checks 가 있으며, 본 논문에서는 사용자가 주기적으로 시행하는 performance tests, performance check 에 관하여 기술한다.

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Tests of Fire and Flame Retardant Performance for Membrane Materials (막재료의 난연 및 방염성능 실험에 대한 연구)

  • Kim, Gee-Cheol;Choi, Kwang-Ho
    • Journal of Korean Association for Spatial Structures
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    • v.16 no.2
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    • pp.55-60
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    • 2016
  • The Membrane structure has a number of problems in the application of a fireproof code based on general buildings codes. Thus, the fireproof code of membrane structure is necessary to activate the construction of the membrane structure. Because it requires a systematic classification of fire retardant and flame proof performance of membrane material. Fire retardant and flame proof tests are conducted on membrane materials mostly used in current construction to propose the fire and flame retardant performance criteria of membrane materials. Fire and flame retardant tests results, PTFE membrane material with the glass fiber fabric have a limit-combustible performance. PVDF membrane material with the polyester fabric does not ensure the fire retardant performance, but this membrane material has the flame retardant performance of a thick fabric. Also, ETFE does not ensure the fire retardant performance, but this membrane material has the flame retardant of a thin fabric.

A Study on the Refractory Performance Verification of the Thermal Insulators for AES Ducts and Piping (AES 계열 덕트·배관 단열재의 내화성능 검증에 관한 연구)

  • Kwang-Ho Ham;Jea-Chun Sa;Joo-Hwan Lee;Se-Hong Min
    • Journal of the Society of Disaster Information
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    • v.20 no.2
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    • pp.419-429
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    • 2024
  • Purpose: To enhance the non-combustibility of fire protection piping insulation and improve the heat resistance of smoke extraction duct insulation, I plan to verify the suitability of AES insulation materials for these applications through performance testing. Method: The non-combustibility, heat resistance, and thermal insulation performance of AES insulation materials will be verified through various tests. Result: According to the 'Standards for Flame Retardancy and Fire Spread Prevention of Building Finishing Materials,' the results of non-combustibility and gas toxicity tests confirmed the non-combustible properties. The standard fire resistance tests verified the fire resistance performance. Additionally, the thermal insulation performance was confirmed through building insulation tests. Conclusion: As the performance tests on AES inorganic insulation materials have proven their noncombustibility, fire resistance, and thermal insulation performance, these materials are considered a viable alternative for improving fire spread prevention in buildings.

Evaluation criteria for filling performance of high-flowing concrete using steel-concrete panel

  • Dong Kyu Lee;Jae Seon Kim;Myoung Sung Choi
    • Advances in concrete construction
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    • v.16 no.5
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    • pp.231-241
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    • 2023
  • The purpose of this study was to evaluate the practical application of high-flowing concrete for a steel-concrete panel (SCP) module for a liquefied natural gas (LNG) storage tank. We evaluated the physical properties and filling performance of the developed concrete for the SCP module. First, slump tests were performed to evaluate the performance of the proposed standards for the filling tests. All the concrete mixes showed satisfactory performance. Based on the results of the previous study, the reliability of the required time measured using the T500 test and the rheometer results measured before and after pumping was 0.94, indicating that segregation and blocking should not occur. L-box and U-box tests were conducted before and after pumping. All the recommended standards showed satisfactory performance. The SCP structural module for LNG storage tanks was fabricated to a full scale to evaluate its practical application at the final site. Satisfactory filling performance was confirmed for all the specimens.

A Study on Policy Research in Improvement of ITS Performance Tests and Methods (ITS 업무요령 및 성능평가 제도 개선방안의 정책 연구)

  • Chung, Sung-Hak;Yoon, Yeo-Hwan
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.8 no.6
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    • pp.98-111
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    • 2009
  • The objective of this study is to revise the related regulations and laws of intelligent transport systems performance tests and methods. This study improves the reliability of present traffic information, reduce public discontent by systematic reforms and reduce national and social costs through the analysis of intelligent transport system performance tests'current status and problems. This study will maximize the investment profits and efficiency of ITS system as the reliability of transportation information which is created through the maintenance of ITS equipment and center, systemization of work responsibility through close analysis of ITS performance test and overall evaluation of role of ITS performance assessment organization will improve and new level of service will be born.

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Study on the Evaluation Method of Electrical Isolation Property for Hydrogen Fuel Cell Vehicle in Post Crash (수소연료전지자동차의 충돌시 절연성능 평가방법에 관한 고찰)

  • Lee, Kiyeon;Gil, Hyoungjun;Kim, Dongook;Kim, Dongwoo;Kang, Daechul
    • Transactions of the Korean hydrogen and new energy society
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    • v.23 no.6
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    • pp.612-618
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    • 2012
  • In this paper, in order to prevent electric shock of high voltage system of HFCV after crash test, insulation performance measurement methods were studied. Under conditions of in-use, insulation performance tests can be divided into measurement method using the vehicle's own RESS as DC voltage source and measurement method using DC voltage from off-vehicle sources. However, these tests can not be applied after a post-crash because parts of high voltage system cover should be removed, and insulation performance can be influenced during these tests. Therefore, we proposed post-crash insulation performance test methods for preventing electric shock through problem analysis of previous post-crash insulation performance tests. Also, test equipment which can measure voltage absence and total energy was developed. We verified performance of the equipment through experiments with vehicle test.

Evaluation of the seismic performance of butt-fusion joint in large diameter polyethylene pipelines by full-scale shaking table test

  • Jianfeng Shi;Ying Feng;Yangji Tao;Weican Guo;Riwu Yao;Jinyang Zheng
    • Nuclear Engineering and Technology
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    • v.55 no.9
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    • pp.3342-3351
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    • 2023
  • High-density polyethylene (HDPE) pipelines in nuclear power plants (NPPs) have to meet high requirements for seismic performance. HDPE pipes have been proved to have good seismic performance, but joints are the weak links in the pipelines, and pipeline failures usually initiate from the defects inside the joints. Limited data are available on the seismic performance of butt-fusion joints of HDPE pipelines in NPPs, especially in terms of defects changes inside the joints after earthquakes. In this paper, full-scale shaking table tests were performed on a test section of suspended HDPE pipelines in an NPP, which included straight pipes, elbows, and 10 butt-fusion joints. During the tests, the seismic load-induced strain of the joints was analyzed by strain gauges, and it was much smaller than the internal pressure and self-weight-induced strain. Before and after the shaking table tests, phased array ultrasonic testing (PA-UT) was conducted to detect defects inside the joints. The locations, numbers, and dimensions of the defects were analyzed. It was found that defects were more likely to occur in elbows joints. No new defect was observed after the shaking table tests, and the defects showed no significant growth, indicating the satisfactory seismic performance of the butt-fusion joints.

헬리콥터용 반토오크 시스템 1차 시제 성능시험

  • Song, Keun-Woong;Kang, Hee-Jung;Sim, Joung-Wook;Lee, Je-Dong;Kim, Seung-Bum
    • Aerospace Engineering and Technology
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    • v.4 no.2
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    • pp.50-59
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    • 2005
  • This paper described performance test of 1st prototype "Tail-Fan" system. KARI(Korea Aerospace Research Institute) developed "Tail-Fan" system as a kind of helicopter anti-torque system(ATS) and designed ATS performance test-rig for Tail-Fan system performance test. For Tail-Fan system performance tests, firstly, test-rig operation tests were carried out for verification of design specifications. And natural frequencies of fan blade and test-rig were measured respectively. To find the operation rotating speed for performance tests, vibration tests using accelerometers on tail gear box(TGB) were carried out. Through the fanplot and vibration test results, rotational speed for Tail-Fan performance test to avoid a resonance were found and performance tests were carried out in flight conditions. We analyzed test data by non-dimensionalization. Through this results, 1st prototype "Tail-Fan" system was satisfied with design requirements.

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Slug Interference Tests: Performance and Comparison

  • 이진용;이명재;최예권;김용철
    • Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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    • 2001.09a
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    • pp.184-187
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    • 2001
  • This study presents procedure and analysis method for not well known slug interference tests. Results of the slug interference tests were compared with those of pumping and recovery tests and conventional slug tests.

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Performance Test of 21AFR Lean Fuel Module at Low and High Operating Conditions (21AFR 희박연료모듈의 저압 및 고압 연소성능시험)

  • Han, Yeoung-Min;Ko, Young-Sung;Yang, Soo-Seok;Lee, Dae-Sung
    • Proceedings of the KSME Conference
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    • 2001.06d
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    • pp.858-863
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    • 2001
  • In this paper, the test and result of flow and combustion for 21AFR lean fuel models are described. The necessity to develop the low emission combustor has been issued from the concern on the increase of green house and the destruction of ozone layer. To evaluate the flow and combustion performance of new designed 21AFR lean modules, the hydraulic tests in stereo lithographic airflows models, the low pressure combustion tests in three injectors model for weak extinction and ignition and the high pressure combustion tests in single sector for NOx, SAE and efficiency are performed. The low pressure tests reveal that the governing parameters in weak extinction and ignition at atmospheric condition are prefilmer length, swirl flow rotation direction, secondary swirl angle and flow split. As a results of combustion test at high pressure, the efficiency and smoke level are satisfied with performance targets, but EINOx of 17.8 is higher than target value of 13.1. The high pressure tests show that the main parameters influenced on NOx are primary swirl angle, swirl flow rotation direction, heatshield exit angle and liner mixing hole location.

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