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Design of Electronic Equipment Casings for Natural Air Cooling: Effects of Height and Size of Outlet Vent on Flow Resistance
[chapter]
2011
Heat Transfer - Engineering Applications
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For example, the simplified set of equations was based on a ventilation model like a chimney with a heater at the base and an outlet vent on the top, yet in practical electronic equipment, the outlet vent ...
Almost all electronic equipment is cooled by air convection. ...
doi:10.5772/26254
fatcat:skpf5yzr4zfbbewdxju5kvhcnq
Ventilation Design for Factory Buildings Equipped with Silencer Type Inlets and Outlets
消音型給排気口をもつ工場の換気計画
1981
The Journal of the INCE of Japan
消音型給排気口をもつ工場の換気計画
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Influence of the Radial Clearance on Outlet Velocity Losses in the Unshrouded Turbine Cascade
2018
NTU KhPI Bulletin Power and heat engineering processes and equipment
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Рассмотрены результаты экспериментального исследования влияния радиального зазора на структуру потока за ступенью и составляющие потерь на различных режимах работы. Показано, что в зависимости от осредненного угла выхода потока из ступени в абсолютном движении выходные потери могут увеличиваться, снижаться или оставаться неизменными в результате изменения характера распределения вдоль радиуса абсолютной скорости при изменении зазора. С целью усовершенствования методики одномерного расчета
doi:10.20998/2078-774x.2018.11.14
fatcat:fgnaxmw7zvgmrn7nv63un7wake
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... жен способ определения выходных потерь с учетом радиальной неравномерности абсолютной скорости за ступенью. Ключевые слова: осевая ступень, радиальный зазор, коэффициент полезного действия, выходные потери, методика расчета, мощность ступени. А. В. ЛАПУЗІН, В. П. СУБОТОВИЧ, Ю. О. ЮДІН, О. Ю. ЮДІН ВПЛИВ РАДІАЛЬНОГО ЗАЗОРА НА ВТРАТИ З ВИХІДНОЙ ШВИДКІСТЮ У ТУРБІННОМУ СТУПЕНЮ БЕЗ БАНДАЖА Розглянуто результати експериментального дослідження впливу радіального зазору на структуру потоку за ступенем і складові втрат на різних режимах роботи. Показано, що в залежності від усередненого кута виходу потоку зі ступеня в абсолютному русі вихідні втрати можуть збільшуватися, зменшуватися або залишатися незмінними в результаті зміни характеру розподілу уздовж радіуса абсолютної швидкості при зміні зазору. З метою удосконалення методики одновимірного розрахунку запропоновано спосіб визначення вихідних втрат з урахуванням радіальної нерівномірності абсолютної швидкості за ступенем. Ключові слова: осьовий ступінь, радіальний зазор, коефіцієнт корисної дії, вихідні втрати, методика розрахунку, потужність ступеня. А. Small-size turbines of the aviation gas-turbine plants differ by their high output losses and a high sensitivity to the value of radial clearance over the rotor blades. An increase in this clearance, for example, in-operation results in the reduced power efficiency factor due to a change in the losses in the nozzle, in the turbine wheel and output losses. Test data of the cascade of an average reliability with the rotor blade height of 20.73 mm were given for the three clearances, in particular 0.22; 0.6 and 1.0 m. An increase in the losses in the upper zone was recorded for rotor and nozzle blades with an increase in clearance. It was shown that due to a change in the distribution behavior along the radius of absolute velocity С 2 output losses can either be increased or decreased or remain unchanged at a change in the clearance depending on the averaged angle of flow output from the cascade in the absolute motion α 2. To improve the methods of one-dimensional computation of the cascade using the integral characteristics of its lattices the method of definition of output losses was suggested taking into consideration radial nonuniformity of the velocity С 2 at a high clearance value. It is assumed that the flow velocity С 2 is constant along the radius at a minimum clearance value of 0.22 mm. A degree of the radial nonuniformity of velocity С 2 was taken into consideration using the cascade test data in different modes and at different clearances. The obtained test data on the influence of clearance on absolute losses with the output velocity are naturally not multi-purpose, because even for the cascade investigation, the kinetic energy of flow behind it depends not only on the clearance value and the averaged output angle but also on some other auxiliary factors.
Galvanic Corrosion and Simulation Analysis For Protecting Corrosion of Dam Outlet Equipment
ダム放流設備の異種金属接触腐食の実態と解析シミュレーション
1993
Journal of Japan Society of Dam Engineers
ダム放流設備の異種金属接触腐食の実態と解析シミュレーション
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Development of Air Conditioning Equipment Inspection Robot for Automatic Measurement of Outlet Air Volume
空調用吹出空気検査自動化のための風量検査ロボットの試作・評価実験
1996
Journal of the Robotics Society of Japan
空調用吹出空気検査自動化のための風量検査ロボットの試作・評価実験
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日本 ロ ボ ッ ト 学 会 誌14巻5号 1996年7月 119
2 Development of Air Conditioning Equipment Inspection Robot for Automatic Measurement of Outlet Air Volume Shigenori Ito * 1, Toshio Fukuda * 1, Fumihito ...
日 本 ロ ボ ッ ト学 会 誌Vol.14 No.5,pp.720-732,1996 1総合論文 We developed air conditioning equipment inspection robot with vision sensor. ...
doi:10.7210/jrsj.14.720
fatcat:ak7kkmzztrefnemnlqlr7i4b34
Study on Chimney Effect in Natural Air Cooled Electronic Equipment Casings under Inclination (2nd Report, The Proposal of a Thermal Design Correlation including Porosity Coefficient of an Outlet Opening)
薄型自然空冷電子機器のきょう体傾きによる煙突効果 (第2報,出口開口率を考慮した熱設計整理式の提案)
2005
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
薄型自然空冷電子機器のきょう体傾きによる煙突効果 (第2報,出口開口率を考慮した熱設計整理式の提案)
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I Experimental equipment り返 す.本 実 験 にお け る振 動 の激 しい測 定点 で は10K 以 上 の振 動 を確認 して い る.し た が っ て,測 定 点 にお け る温度 の定 義 が非 常 に あ い まい な もの とな って しま い,測 定デ ー タの 一般 性 が損 なわ れ て しま う恐 れ が あ る.そ の た め,本 研 究 に お い ...
coefficient of outlet openings and inclination on the Flow volume
Fig. 13 13 Fig. 13 Comparison of the model duct and the inclined casing
Fig.15 Relationship between Raβ* and Nuβ* ...
doi:10.1299/kikaib.71.1625
fatcat:idxf36ymbng2tc5exyqasn7sda
Analytical determination of the optimal ratio of the knife thickness and the outlet grate of the auger grinder with a parabolic pressure change along its radius
Аналитическое определение оптимального соотношения толщины ножа и выходной решетки шнекового измельчителя при параболическом изменении давления вдоль ее радиуса
2021
Processes and Food Production Equipment
Аналитическое определение оптимального соотношения толщины ножа и выходной решетки шнекового измельчителя при параболическом изменении давления вдоль ее радиуса
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На внешней границе измельчительной решетки (на ее периферии) устанавливается давление
Processes and Food Production Equipment. 2021, no.4 ...
Modernized variant of combined loading the cutting pair of the knife blade and the grate and individual bending of the grate and the knife blade: 1 -outlet grate; 2 -knife blade; 3 -zone of uniform contact ...
doi:10.17586/2310-1164-2021-14-4-20-36
fatcat:63f4izihdnemnjpkxgojalox7q
食堂を併設した業務用厨房の換気・空調設計システムに関する研究 (第5報)排気フードに対する調理機器および空調吹出しの設置位置に関する調査
Survey Study on Ventilation and Air Conditioning System of Commercial Kitchen with Dining Hall Part 5. Survey on Installation Position of Cooking Equipment and Air Conditioning Outlet to Exhaust Hood
2013
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan
Survey Study on Ventilation and Air Conditioning System of Commercial Kitchen with Dining Hall Part 5. Survey on Installation Position of Cooking Equipment and Air Conditioning Outlet to Exhaust Hood
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In this paper, it is clarified the air conditioning outlet type, principal air conditioning system, installation position of cookware and air conditioning outlet which effects to the capture of exhaust ...
In actual kitchen, airflow from air conditioning outlet can influence on capture efficiency of an exhaust hood. ...
doi:10.18948/shasetaikai.2013.4.0_21
fatcat:kcwhosbuo5ds5nvahg6yi44vay
低放射・集中排気型厨房機器を用いた業務用厨房の空気・温熱環境に関する研究 (その16)空調擾乱と人体擾乱がフード捕集率に与える影響
Indoor Air Thermal Environment of Commercial Kitchen Using Low Radiative Cooking Equipment with Concentrated Exhaust Part16. Influence of Capture Efficiency of Exhaust Hood by Disturbing Airflow by HVAC outlets or Moving Panel
2014
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan
Indoor Air Thermal Environment of Commercial Kitchen Using Low Radiative Cooking Equipment with Concentrated Exhaust Part16. Influence of Capture Efficiency of Exhaust Hood by Disturbing Airflow by HVAC outlets or Moving Panel
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To improve kitchen condition, and save the energy, low radiative cooking equipment with concentrated exhaust chimney was developed. Although a ventilation rate may be ...
decreased by using this equipment, effluent needs to be captured well. ...
In this paper, it's described the influence of capture efficiency of exhaust under the disturbing airflow by HVAC outlets or Moving Panel. 基本的な装置概要は既報 3) に示されている。 ...
doi:10.18948/shasetaikai.2014.4.0_161
fatcat:c5aezoerprcevgbkruuju3dkvi
Simulation of Material Flow Through a Sample Divider
2018
Advances in Science and Technology Research Journal
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The prerequisite for a modern approach to innovative procedures of the development of current or even newly created equipment for the transport of particulate materials is the utilization of simulation ...
Experiments on a realistic model of the equipment were performed and assessed. The total weights of brown coal at the exit from the divider were determined for a specific speed of the divider. ...
A weight of 7.89 kg was measured at the waste outlet and 1.02 kg at the sampling outlet of the sampling equipment. Theoretically, 1.09 kg remained in equipment. ...
doi:10.12913/22998624/85663
fatcat:p5cs4bsfxrhx5njbctlk4x5twa
Implementation of a wireless energy management and safety system
2015
International Journal of Smart Grid and Clean Energy
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The system consists of the intelligent outlet module, wireless transmission module and central monitor and control module. ...
In addition, the all-graphic human machine interfaces is implemented to display the power usage and all control functions of electric equipment completely. ...
Many kinds of electric equipment are frequently used without being disconnected from the outlets [1]- [2] . ...
doi:10.12720/sgce.4.2.125-131
fatcat:x377ees2jrervf3edy47kuqoba
Page 38 of Journal of Pharmaceutical Sciences Vol. 55, Issue
[page]
1936
Journal of Pharmaceutical Sciences
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Living Room... .32.3% Floor outlet* 6 baseboard outlets* Ceiling fixture, brackets* Special purpose outlets* Radio outlet* Vacuum cleaner Corn popper Bridge and table lamps Electric clock*? ...
lights—brackets* 4 convenience outlets* Imersion heater Radio outlet* Range-—~cooker* Mixer Refrigerator* Dishwasher* Ventilating fan* Electric clock*
Dining Room... .24.8%
Floor outlet* 4 baseboard outlets ...
Power Substation Construction and Ventilation System Co-Designed Using Particle Swarm Optimization
2020
Energies
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We established a multiobjective particle swarm optimizer to identify the best approach for simultaneously improving, first, the ventilation performance considering the most appropriate inlet size and outlet ...
openings and second, the reduction of the synthetic noise of the ventilation and power consumption from the exhaust fan equipment and its operation. ...
arranged on the roof of the equipment room and the, inlet/outlet is fixed. ...
doi:10.3390/en13092314
fatcat:ctnunb2ntnfxpplpu3jsrtub7q
Page 367 of Science Education Vol. 45, Issue 4
[page]
1961
Science Education
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D.C. electrical outlets and com- pressed air outlets were available in labora- tories of less than than 25 per cent of the schools. ...
Ninety per cent or more of the high schools had the following presentation fa- cilities in their science classrooms: chalk- boards, A.C. electrical outlets, picture pro- jection equipment, running water ...
Analysis and Discussions on the Nonuniformity Problem of SCR Denitration Equipment NOx Concentration Distribution in a 600MW Coal-fired Unit
2020
E3S Web of Conferences
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By adjusting the ammonia injection valve opening, the uniformity of SCR outlet NOx concentration increases by about 30%, the performance of SCR denitration equipment is obviously improved. ...
At the same time, rationalization proposals and solution measures for the improvement of outlet concentration uniformity are given in order to ensure the safe and stable operation of denitration equipment ...
Distribution of outlet flow field of denitrification equipment
Distribution of NOX concentrations
Fig.2. ...
doi:10.1051/e3sconf/202016501027
fatcat:djxnppbb4fdzjmftshir3vydme
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