• Title/Summary/Keyword: Railroad Passenger Cabin

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Study on the environmental performance test of cooling and heating equipments' of passenger cabin (철도차량 냉방 및 난방장치의 환경성능 시험방안 연구)

  • Cho, Young-Min;Lee, Jun-Seok;Park, Duck-Shin;Kwon, Soon-Bark;Jung, Woo-Sung
    • Proceedings of the KSR Conference
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    • 2009.05a
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    • pp.223-228
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    • 2009
  • Cooling and heating equipments of railroad passenger cabin is one of the most important part in keeping the good thermal comfort of the passengers. The bad performance of these equipments usually results in the comfort of the passengers. However, there is no testing method for cooling and heating equipments during manufacturing the passenger car, and calculation method is frequently used. Many railroad operators spend a lot of money for the maintenance. In this study, a new environmental performance test for railroad passenger cabin was suggested. The temperature of the chamber will be changed from $-40^{\circ}C$ to $60^{\circ}C$. The performance test of cooling and heating equipment in controlling the passenger cabin temperature was carried out under various temperature condition. The testing method to investigate the effect of artificial sunlight irradiation on the passenger cabin temperature was also suggested.

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Air Quality and PM10 Source Analysis on the Railway Vehicles (철도차량에서의 공기질 현황 및 PM10 오염원 분석)

  • Park, Duck-Shin;Kim, Dong-Sool;Cho, Young-Min;Kwon, Soon-Bark;Park, Eun-Young
    • Journal of Korean Society for Atmospheric Environment
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    • v.23 no.3
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    • pp.311-321
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    • 2007
  • Nowadays, concerns have much more growing regarding indoor air quality (IAQ) on the public transportation including railway vehicles. Last year Korea Ministry of Environment (ME) set new guideline for public transportation. In this study several factors were analyzed which may affect comfortableness of railway passenger cabin, and we monitored IAQ parameters (PM10, CO, $CO_2$, VOCs, temperature and humidity) to investigate the present pollution in passenger cabin. In general, the railway air quality was satisfactory. The PM10 and $CO_2$ level on all passenger cabin were below the new guideline level 1 for PM10 $(200{\mu}g/m^3)\;and\;CO_2(2,000ppm)$. Clustering method was carried out to classify the air polluting pattern of the cabin. As a result, the pollutants could be classified to 4 clusters and the origin of pollution is soil, diesel exhaust gas, abrasion of rail and plume.

Development of Amenity-oriented Air Cleaning System for Railroad Passenger Cabin (철도차량용 공기청정시스템 개발)

  • Park, Duck-Shin;Cho, Young-Min;Kwon, Soon-Bark;Park, Eun-Young
    • Proceedings of the KSR Conference
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    • 2007.05a
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    • pp.1288-1292
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    • 2007
  • Because the indoor spaces of the passenger cabin is generally airtight to secure the safety of passengers and enhance the efficiency of the cabin air conditioning performances, the contamination pattern of them are largely similar to that of general indoor spaces. Therefore, continuous supply of outdoor air is required to keep the amenity of indoor space. Heating, ventilation, and air-conditioning (HVAC) system is composed of air cleaning filter, heater and air conditioned, blower and ducts. To achieve the clean indoor environment, an integrated control of each HVAC equipment are required. In this study, we developed the air cleaning system to enhance the amenity of the railroad passenger cabin.

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Development of Amenity-Oriented Air Cleaning System for Railroad Passenger Cabin (객차용 청정시스템 개발)

  • Park, Duch-Shin;Cho, Young-Min;Kwon, Soon-Bark;Park, Eun-Young
    • Proceedings of the KSR Conference
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    • 2006.11b
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    • pp.1234-1239
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    • 2006
  • Because the indoors spaces of the passenger cabin is generally airtight to secure the safety of passengers and enhance the efficiency of the cabin air conditioning performances, the contamination pattern of them are largely similar to that of general indoor spaces. Therefore, continuous supply of outdoor air is required to keep the amenity of indoor space. Heating, ventilation, and air-conditioning (HVAC) system is composed of air cleaning filter, heater and air conditioned, blower and ducts. To achieve the clean indoor environment, an integrated control of each HVAC equipment are required. In this study, we developed the air cleaning system to enhance the amenity of the railroad passenger cabin.

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Study on the Removal of Carbon Dioxide in Passenger Cabin using Ion-Exchanged Zeolites (이온교환한 제올라이트를 이용한 객실용 이산화탄소 저감방안 연구)

  • Cho, Young-Min;Choi, Jin-Shik;Kwon, Soon-Bark;Park, Duck-Shin;Lee, Ji-Yun;Kim, Hee-Man
    • Proceedings of the KSR Conference
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    • 2011.05a
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    • pp.568-573
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    • 2011
  • Carbon dioxide concentration of railroad passenger cabin is obliged to be kept lower than guideline values of 'Indoor air quality guideline for public transportations', but actual carbon dioxide concentration frequently exceeds this guideline value. Ventilation is most desirable to lower carbon dioxide concentration but there are some cases when the ventilation is not applicable. In this study, carbon dioxide concentration control method using adsorbents was presented. The cation of zeolites were exchanged with various kinds of cations, and the carbon dioxide adsorption performance of the zeolites were studied. The various kinds of cations, solvents, and zeolites were introduced, and it was found that some cation-exchanged zeolites showed good carbon dioxide adsorption performances. It is expected that the obtained results will be used to lower carbon dioxide concentration of railroad passenger cabin.

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Study on the Adsorption of Carbon Dioxide in Passenger Cabin Using $Al_2O_3$ Adsorbent ($Al_2O_3$ 흡착제를 이용한 객실용 이산화탄소 흡착연구)

  • Cho, Young-Min;Choi, Jin-Sik;Lee, Ji-Yun;Kwon, Soon-Bark;Park, Duck-Shin
    • Proceedings of the KSR Conference
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    • 2011.10a
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    • pp.138-141
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    • 2011
  • Carbon dioxide concentration of railroad passenger cabin is obliged to be kept lower than guideline values of 'Indoor air quality guideline for public transportations', but actual carbon dioxide concentration frequently exceeds this guideline value during the morning and evening rush hours. For improving comfortability and satisfaction of passengers, concentration control method using $Al_2O_3$ adsorbents was presented. The adsorbent is made from $Al_2O_3$ and LiOH. $Al_2O_3$ perform as a frame and LiOH as a chemical adsorbent. The adsorbent performance experiment was carried out by measuring concentration change of Carbon dioxide in terms of flow, initial concentration and amount of adsorbent. It is expexted that the obtained results will be used to lower carbon dioxide concentration of railroad passenger cabin.

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Characteristics of PM10, PM2.5 and CO2 Concentration in Public Transportations and Development of Control Technology (대중교통수단에서 PM10, PM2.5 및 CO2의 농도 현황과 저감기술 개발에 관한 연구)

  • Park, Duck Shin;Kwon, Soon Bark;Cho, Young Min;Jang, Seong Ki;Jeon, Jae Sik;Park, Eun Young
    • Particle and aerosol research
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    • v.6 no.1
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    • pp.9-20
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    • 2010
  • This study examined the concentration level of the major air pollutants in public transportation. The study was conducted between February 2009 and March 2008 at Suwon-Yeosu line in Korea. $PM_{10}$ concentration level was $100{\mu}g/m^3$ on average. The $PM_{2.5}$ to PM10 ratio in transport is 0.37, which was lower than the results published by other researches. The result also demonstrated that outdoor $PM_{10}$ concentration was about 56~60% level compared to that of the cabin. $CO_2$ concentration level in the cabin was 1,359ppm, which does not exceed 2,000ppm, which is the guideline concentration level according to the Ministry of Environment. $CO_2$ concentration level in the cabin was $CO_2=23.4{\times}N+460.2$, and about 23.4ppm in $CO_2$ concentration level increased every time one passenger was added on. The experiment conducted on the train demonstrated that the average $PM_{10}$ concentration level was $100{\mu}g/m^3$ in case of the reference cabin while average $PM_{10}$ concentration level of the modified vehicle was $68{\mu}g/m^3$. Likewise, effect of the particle reduction device for the reduction of $PM_{10}$ concentration level was approximately 21%. Meanwhile there was almost no difference in the concentration level between reference and modified cabin in case of $PM_{2.5}$. Using zeolite as an adsorbent was made to reduce the $CO_2$ concentration level in the cabin. Number of passengers was factored in, to calculate the effect of the adsorption device, which demonstrated that about 36% of $CO_2$ concentration level was reduced in the modified cabin effect of the $CO_2$ reduction device. This research analyzed the current status concerning the quality of air in the public transportation and technologies were developed that reduces major air pollutants.

Study on the Temperature Distribution of Cabin under Various Car Heating Modes (난방기 출력에 따른 철도차량 객실 내부 온도 분포 분석)

  • Cho, Youngmin;Yoon, Young-Kwan;Park, Duck-Shin;Kim, Tae-Wook;Kwon, Soon-Bark;Jung, Woo-Sung;Kim, Hee-Man
    • Journal of the Korean Society for Railway
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    • v.15 no.6
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    • pp.558-565
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    • 2012
  • Abnormal climate or weather is more frequently reported nowadays due to the global climate change. Especially, extremely low temperature in winter season may cause bad thermal discomfort of passengers. In this study, the effect of car heating modes on cabin temperature change and distribution was studied by using a real-scale environmental chamber for passenger cabin. It was found that the cabin temperature rose quickly at the initial stage of heating system operation, but it stopped increasing after certain point. And, temperature was higher when the height from the floor was higher. Based on the obtained result, the way to minimize the decrease of passengers' thermal comfort was suggested.

NUMERICAL SIMULATION OF PRESSURE CHANGE INSIDE CABIN OF A TRAIN PASSING THROUGH A TUNNEL (터널을 통과하는 열차의 객실 내 압력 변동 해석)

  • Kwon, H.B.;Yun, S.H.;Nam, S.W.
    • Journal of computational fluids engineering
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    • v.17 no.1
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    • pp.23-28
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    • 2012
  • The pressure transient inside the passenger cabin of high-speed train has been simulated using computational fluid dynamics(CFD) based on the axi-symmetric Navier-Stokes equation. The pressure change inside a train have been calculated using first order difference approximation based on a linear equation between the pressure change ratio inside a train and the pressure difference of inside and outside of the train. The numerical results have been assessed for the KTX train passing through a 9km long tunnel of Wonju-Kangneung line at the speed of 250km/h assuming that the train is satisfying the train specification for airtightness required by the regulation.