A cylindrical furnace with homogeneous temperature distribution for use in a cubic high‐pressure press

1990 ◽  
Vol 61 (2) ◽  
pp. 830-833 ◽  
Author(s):  
Yasushi Kawashima ◽  
Yoshihiko Tsuchida ◽  
Wataru Utsumi ◽  
Takehiko Yagi
Keyword(s):  
High Pressure ◽  
Temperature Distribution ◽  
Cylindrical Furnace ◽  
Homogeneous Temperature

scholarly journals Catalytic Micro Gas Sensor with Excellent Homogeneous Temperature Distribution and Low Power Consumption for Long-Term Stable Operation

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 927 ◽  
Author(s):  
Anmona Shabnam Pranti ◽  
Daniel Loof ◽  
Sebastian Kunz ◽  
Marcus Bäumer ◽  
Walter Lang
Keyword(s):  
Temperature Distribution ◽  
Low Power ◽  
Gas Sensor ◽  
Gas Flow ◽  
Pt Nanoparticles ◽  
Stable Operation ◽  
Catalytic Layer ◽  
Micro Gas Sensor ◽  
Homogeneous Temperature

This paper presents a long-term stable thermoelectric micro gas sensor with ligand linked Pt nanoparticles as catalyst. The sensor design gives an excellent homogeneous temperature distribution over the catalytic layer, an important factor for long-term stability. The sensor consumes very low power, 18 mW at 100 °C heater temperature. Another thermoresistive sensor is also fabricated with same material for comparative analysis. The thermoelectric sensor gives better temperature homogeneity and consumes 23% less power than thermoresistive sensor for same average temperature on the membrane. The sensor shows linear characteristics with temperature change and has significantly high Seebeck coefficient of 6.5 mV/K. The output of the sensor remains completely constant under 15,000 ppm continuous H2 gas flow for 24 h. No degradation of sensor signal for 24 h indicates no deactivation of catalytic layer over the time. The sensor is tested with 3 different amount of catalyst at 2 different operating temperatures under 6000 ppm and 15,000 ppm continuous H2 gas flow for 4 h. Sensor output is completely stable for 3 different amount of catalyst.

scholarly journals Thermal Modeling of Tool Temperature Distribution during High Pressure Coolant Assisted Turning of Inconel 718

Materials ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 408 ◽  
Author(s):  
Doriana D'Addona ◽  
Sunil Raykar
Keyword(s):  
High Pressure ◽  
Temperature Distribution ◽  
Inconel 718 ◽  
Tool Temperature ◽  
Machining Processes ◽  
Nickel Chromium ◽  
Work Material ◽  
Cutting Zone ◽  
Overall Performance ◽  
High Pressure Coolant

This paper presents a finite-element modeling (FEM) of tool temperature distribution during high pressure coolant assisted turning of Inconel 718, which belongs to the heat resistance superalloys of the Nickel-Chromium family. Machining trials were conducted under four machining conditions: dry, conventional wet machining, high pressure coolant at 50 bar, and high pressure coolant at 80 bar. Temperature during machining plays a very important role in the overall performance of machining processes. Since in the current investigation a high pressure coolant jet was supplied in the cutting zone between tool and work material, it was a very difficult task to measure the tool temperature correctly. Thus, FEM was used as a modeling tool to predict tool temperature. The results of the modeling showed that the temperature was considerably influenced by coolant pressure: the high pressure jet was able to penetrate into the interface between tool and work material, thus providing both an efficient cooling and effective lubricating action.

scholarly journals Numerical Investigation of Air Conditioners’ Control Unit Position On Temperature Distribution and Energy Consumptions of a Room

2019 ◽  
Vol 111 ◽  
pp. 02039
Author(s):  
Mustafa Mutlu ◽  
Emre Çalışkan
Keyword(s):  
Steady State ◽  
Temperature Distribution ◽  
Control Unit ◽  
Air Conditioners ◽  
Comfort Levels ◽  
Temperature Distributions ◽  
Energy Consumptions ◽  
Cooling Loads ◽  
Homogeneous Temperature ◽  
Comfort Criteria

Minimum temperature difference should be achieved in conditioned rooms to meet comfort criteria. It is desired that the temperature set by a user from the control unit, should be the same in the entire room. Therefore, the position of the control unit plays a significant role in order to achieve a homogeneous temperature distribution in the room. In this study, the effect of control unit positioning on temperature and velocity distributions in a room, where a cassette type indoor unit was applied, was numerically investigated. Blowing temperature and speed of the indoor unit has been adjusted by the temperature value that measured by a control unit which was placed at five different locations, in order to examine positioning effects of the control unit. Predicted percentage dissatisfied (PPD) values were calculated, and uncomfortable zones were determined by 2-dimensional analyses. Cooling loads, as well as energy consumptions, were calculated and their variations according to the position of control unit was figured out in steady state conditions. The results showed that control unit positioning not only influences the comfort levels or temperature distributions in a room but also energy consumptions.

scholarly journals Spektroskopische Messung der radialen Temperaturverteilung in Quecksilber-Hochdrucklampen mit Metallhalogenzusätzen / Spectroscopic Measurement of Radial Temperature Distribution in High-Pressure Mercury Lamps with Metal Halide Additives

1976 ◽  
Vol 31 (2) ◽  
pp. 196-200 ◽  
Author(s):  
H. Albrecht ◽  
A. Schiff
Keyword(s):  
High Pressure ◽  
Temperature Distribution ◽  
Spectroscopic Measurement ◽  
Signal Averaging ◽  
Radial Temperature ◽  
Radial Temperature Distribution ◽  
Pressure Discharge ◽  
High Incidence ◽  
Definite Time ◽  
Absorption Measurements

Abstract The radial temperature distribution in a Hg-high-pressure discharge with metal halogene additives (Sn-, Zn-Iodide) has been measured. Three different spectroscopic methods (Emission-, Absorption-, Bartels-and 2-lines-Method) are compared. The influence of the silica bulb is discussed. High incidence angles for the absorption measurements are realized by use of an elliptic mirror. Emission and absorption measurements in a definite time intervall of the 50 Hz-discharge current was done with signal averaging technique. The arc shows a constriction which is discussed.

Sign in / Sign up

Export Citation Format

Share Document