Development of Diesel Particulate Filter Applying Non-thermal Plasma Technology for Onboard Diesel Generators

Kato, Toshihito; Ibaragi, Shouichi; Matsuoka, Katsunori; Imai, Kanehisa; Sato, Kazutoshi

doi:10.5988/jime.45.962

Cited by 7 publications

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References 2 publications

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“…E E E (10) In this experiment, the contact is assumed to be Hertzian between a sphere and a flat, hence the Hertzian contact radius a h is given by: Table 3 shows the values used for the calculation. Figure 9 shows the relation between vertical load P and the normal approach n , and the Hertzian contact radius a h is given by equations (9) and (11).…”

Section: Normal Approachmentioning

confidence: 99%

“…Figure 1 shows a schematic diagram of the experimental apparatus, which is a vapor compression heat pump system, consisting of a refrigerant-loop and three water loops. The refrigerant-loop consists of a compressor [1], an oil separator [2], a pre-condenser [4], a test section [5], a rear-condenser [6], a liquid receiver [7], a dryer [14], a mass flow meter [8], an expansion valve [9], and an evaporator [10]. Each of the water loops consists of a water tank [16], a temperature control unit [15], a water pump [17], and flow meters ( [8], [18]).…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, catalytic method cannot be applied for marine diesel engines the fuel of which is heavy oil and include the sulfur. Therefore, some studies have been reported on non-catalytic plasma treatment of PM for marine diesel engines (9), (10) Based upon our series of studies (11)- (14) on diesel PM removal using atmospheric-pressure nonthermal plasma (NTP), in which we sought a solution to the aforementioned problems, we proposed DPF regeneration using nonthermal plasma-induced ozone (O 3 ). O 3 has a high potential for the treatment of various kinds of PM (15) , especially diesel PM such as dry-soot and soluble organic fraction (SOF).…”

Section: Introductionmentioning

confidence: 99%

“…(9),  is a void fraction and can be estimated from Smith's equation (10) , G is the mass flux, x is the vapor quality. F P  is estimated as: …”

mentioning

confidence: 99%

“…[1] Compressor [2] Oil Separator [3] Sight glass [4] Pre-condenser [5] Test section [6] Rear-condenser [7] Liquid receiver [8] Mass flow meter [9] Expansion valve [10] Evaporator [11] Accumulator [12] Vacuum pump [13] Charge port [14] Dryer [15] Temperature control unit [16] Water tank [17] which are installed at both ends of each test section. The refrigerant pressure at the inlet and outlet of the test section and at the inlet of the pre-condenser were measured by a distortion-type absolute pressure transducers, and the refrigerant pressure drop through each section was measured by distortion-type differential pressure transducers.…”

mentioning

confidence: 99%

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Selected Papers in ISME KOBE 2011

論文委員会¹

2012

Marine Engineering

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In this study, we conduct an experimental study on condensation heat transfer and pressure drop using a horizontal smooth and internally helical-grooved small-diameter tube with an outside diameter of 4.00 mm. The experimental apparatus is a vapor compression heat pump system, which consists of a compressor, a pre-condenser, test sections, a rear-condenser, a receiver, an electronic expansion valve, an evaporator, and heat-source systems. In the experiments, R410A was used as the refrigerant; the ranges of refrigerant mass flux varied from around 215 to 1290 kg/(m 2 s), and the condensation saturated temperatures were maintained at 35°C and 40°C. From the experimental results, the local heat transfer coefficients of the internally helical-grooved tube were about 1.2-2.0 times larger than those of the smooth tube. In addition, we compared the experimental values of the local condensation heat transfer coefficient and pressure drop with the empirical correlation we proposed. Using smooth and internally helical-grooved small-diameter tube, the experimental values of the local condensation heat transfer coefficient were larger than the empirical correlation proposed by the authors. In addition, the experimental values for pressure drop in a smooth and internally helical-grooved small-diameter tube were larger than the predicted value throughout the entire mass flux range.Keywords: Condensation, Heat transfer, Pressure drop, Small-diameter tube, Grooved tube, R410A INTRODUCTIONIn recent years, the development of more efficient, smaller air-conditioning heat exchangers is expected. In particular, the development of high efficiency in the heat-exchanger tube through the use of small diameter tubes is important. Most air conditioning equipment has a heat-exchanger tube with an outside diameter greater than 6.35 mm, therefore, there have been several studies on the correlation for estimating condensation heat transfer and pressure drop inside a horizontal smooth tube, such as those by Cavallini et al (1) , Haraguchi et al (2) , Shikazono et al (3) , Miyara et al (4) , Dobson et al (5) and Inoue et al (6) . However, there have been no studies on the effect on heat transfer and pressure drop of the groove shape inside an internally helical-grooved small-diameter tube, and small-diameter tubes with an outside diameter of 3.00-5.00 mm.In this study, we conducted experiments to obtain data on condensation heat transfer and pressure drop using a smooth and internally helical-grooved small-diameter tube with an outside diameter of 4.00 mm and using R410A as a refrigerant. From the experimental results, we compared the experimental values of the local condensation heat transfer coefficient and pressure drop with the empirical correlations we proposed. In addition, we compared the experimental data with the empirical correlation using the friction factor for small-diameter tube with an outside diameter of 4.00 mm on single-phase flow. Figure 1 shows a schematic diagram of the experimental apparatus, which is a vapor ...

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Section: Normal Approachmentioning

confidence: 99%