• Journal of the Korean Society for Railway
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• v.11 no.2
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• pp.151-157
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• 2008

The DPF temperature distribution which has a great effect on regenerating the ceramic filter effectively was measured at 30 locations using K-type thermocouples. Five partitioned electric heaters were used for heating the ceramic filter and they are switched ON/OFF in order. Also, the temperature distribution in the ceramic filter was measured with varying the electrical power supply to the heaters and the mass flow rate of the air supply from a blower. The uniform distribution of the air flow velocity at the inlet of the DPF make that of the temperature in the ceramic filter. The difference in heating ability between the partitioned heaters had a great effect on the temperature distribution in the ceramic filter.

• Proceedings of the KIPE Conference
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• 2018.07a
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• pp.440-441
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• 2018

본 연구에서는 핫플레이트를 균일한 표면 온도로 가열시키기 위한 카트리지 히터의 설계를 시도하였다. 이를 위하여 1. 표면 전력밀도 및 전열선 전력밀도에 따른 발열온도 측정 실험 2. 카트리지 히터의 분할 영역과 전열선 권선 비율에 따른 온도 측정 실험을 실시하여 온도분포형 카트리지 히터의 설계 사양을 선정하였다. 또한 이렇게 설계한 카트리지 히터를 직접 제작하여 기존의 표준형 카트리지 히터와의 성능 비교 측정 실험을 실시하여, 본 연구에서 제시한 방법으로 제작한 카트리지 히터의 표면 온도 균일도가 우수함(표면 온도차 ${\leq}1.25[^{\circ}C]$)을 증명하였다.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.21 no.6
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• pp.903-909
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• 2012

This study analyzed the temperature distribution in DPF with five partitioned electric heaters. The temperature distribution in DPF is an important design factor for regeneration and durability of filter. The design Factors that influence the temperature distribution in DPF there are several. In this study, the characteristics of temperature distribution in DPF were analyzed according to the following changes. First, the thermal conductivity of the filter was analyzed about effect on the durability of the filter. Second, the length from exhaust manifold to inlet of DPF was analyzed about effect on the temperature distribution in DPF. The boundary conditions of analysis has been verified with comparison to the results of existing experimental study and the numerical analysis. Based on the identified boundary condition, on assuming the condition of the actual driving, the temperature distribution in DPF was analyzed according to material properties of filter and the position of DPF.

• Journal of the Korean Society of Safety
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• v.23 no.5
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• pp.7-14
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• 2008

The temperature distribution in a surface of diesel particulate filter(DPF) was measured using an infrared temperature camera. In order to regenerate the DPF, five partitioned electric heaters were used for heating the ceramic filter. The five partitioned heaters were switched on/off with some time interval one the other. The surface temperature distribution in the ceramic filter and electric heaters were measured with varying both the electrical power supply to the heaters and the mass flow rate of the air supply from a blower. The higher mass flow rate in the DPF system enhanced the uniformity in the surface temperature distribution of the ceramic filter due to effective convection heat transfer. The flow in the monolith ceramic structure of the DPF move mainly in the axial direction, which could be identified from the surface temperature of the ceramic filter.

• Journal of the Korean Society of Combustion
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• v.15 no.3
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• pp.67-73
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• 2010

The temperature distribution of diesel particulate filter with five partitioned electric heaters is numerically analyzed to investigate the condition of regenerating ceramic filter. The commercial code STAR-$CCM+^{(R)}$ is utilized to simulate multi-dimensional steady hot air flow in DPF. In order to verify the computational results, thermocouples are used to measure the temperature distribution in DPF. Computational results agree well with experimental ones. The results show that the maximum temperature in DPF is lowered as the mass flow rate of exhaust gas increases, which means that the more power in heater will be necessary as the engine speed increases. Compared with heater placed at center, heater at circumference has the higher maximum temperature in DPF. The maldistribution of flow field in front of heater has the main influence on the temperature distribution in DPF.