scholarly journals Contribution of air velocity to the particle deposition characteristics on the air side of air cooler exposed to warm, humid, and solid loaded air streams under deep coal mine

2021 ◽  
Vol 861 (5) ◽  
pp. 052066
Author(s):  
Q Y Han ◽  
X X Liu ◽  
Y Zhang ◽  
D B Lin
Keyword(s):  
Coal Mine ◽  
Particle Deposition ◽  
Air Velocity ◽  
Deep Coal Mine ◽  
Air Cooler ◽  
Air Streams

Energy Consumption Analysis of Level Circulating Cooling System in Sanhejian Deep Coal Mine

2011 ◽  
Vol 396-398 ◽  
pp. 516-519
Author(s):  
Yi Zhang ◽  
Dong Ming Guo ◽  
Li Meng
Keyword(s):  
Energy Consumption ◽  
Coal Mine ◽  
Cooling System ◽  
Cooling Water ◽  
Deep Mining ◽  
Heat Damage ◽  
Deep Coal Mine ◽  
Energy Consumption Analysis ◽  
Process System ◽  
Technical Issues

With the deep mining in coal mine, heat damage is one of the technical issues need to be solved. HEMS cooling system in Sanhejian Coal Mine is a process system for high-temperature heat damage controlling in deep coal mine, in which cool energy extracted to reduce work face’s ambient temperature to achieve heat damage controlling. Part of the cool energy is from the level circulating of cooling water in -700 level main raodway, the other is from the mine water. We analyze the energy consumption of every subsystem during operation of the HEMS system, which could provide a theoretical basis and technical guidance on more efficiently running of cooling system deep in the future.

Study on failure mechanism of roadway with soft rock in deep coal mine and confined concrete support system

2017 ◽  
Vol 81 ◽  
pp. 155-177 ◽  
Author(s):  
Q. Wang ◽  
R. Pan ◽  
B. Jiang ◽  
S.C. Li ◽  
M.C. He ◽  
...  
Keyword(s):  
Failure Mechanism ◽  
Support System ◽  
Coal Mine ◽  
Soft Rock ◽  
Confined Concrete ◽  
Deep Coal Mine

Temperature Measurements in High-Velocity Air Streams

1945 ◽  
Vol 12 (1) ◽  
pp. A25-A32
Author(s):  
H. C. Hottel ◽  
A. Kalitinsky
Keyword(s):  
Axial Flow ◽  
Extensive Study ◽  
Recovery Factor ◽  
Scale Model ◽  
Kinetic Temperature ◽  
Flat Plates ◽  
Air Velocity ◽  
Theoretical Predictions ◽  
Air Streams ◽  
Thermocouple Junction

Abstract When a stream of air is partially stopped by an inserted temperature probe, the temperature increase due to the conversion of kinetic energy affects the reading of the probe. The fraction of the total kinetic temperature rise which is registered by the probe, i.e., the so-called “recovery factor” of the probe, is a function of a number of variables. Tests dealing with the effect of probe shape and air velocity on this recovery factor, and with the influence of radiation on the accuracy of the measurements, are reported in this paper. Bare-wire probes gave recovery factors of approximately 0.65 in transverse flow and, in axial flow, approached 0.87 as the air velocity increased (in good agreement with theoretical predictions for flow over flat plates). With a spherical enlargement at the thermocouple junction, recovery approached 0.75. Recovery of twisted-wire couples varied from 0.72 to 0.83. A reduced-scale model of the Franz probe was found unsatisfactory after extensive study. Two simpler probes were developed, having high recovery (above 0.98 as velocity approaches sonic) and satisfactory insensitivity to yaw and radiation errors.

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