A Study on the Water Spray System for Coal Dust Reduction Considering Internal Flow by Belt Operation

2020 ◽  
Vol 24 (3) ◽  
pp. 14-22
Author(s):  
Seong-Ho Kang ◽  
Hae-Eun Song ◽  
Young-Chull Ahn
Keyword(s):  
Coal Dust ◽  
Internal Flow ◽  
Water Spray ◽  
Spray System ◽  
Dust Reduction

scholarly journals Experimental investigations of spray flow rate and angle in enhancing the performance of PV panels by steady and pulsating water spray system

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Mojtaba Nateqi ◽  
Mehran Rajabi Zargarabadi ◽  
Roohollah Rafee
Keyword(s):  
Cooling System ◽  
Spray Cooling ◽  
Spray Angle ◽  
Experimental Investigations ◽  
Water Spray ◽  
Maximum Increase ◽  
Photovoltaic Panel ◽  
Electrical Efficiency ◽  
Spray System ◽  
Pv Panel

AbstractIn this study, a spray cooling system is experimentally investigated to increase the photovoltaic panel efficiency. Cooling of photovoltaic panels is one of the important parameters that affects the PV panel performance. In this experiment the effects of spray angle, nozzles to PV panel distance, number of nozzles, and pulsating water spray on the PV panel performance are investigated. For this purpose, an experimental setup was made. The spray angles varied from 15° to 50°. The comparison between the spray angles shows that by decreasing the spray angle to 15° increases the electrical efficiency of PV panel to 19.78% and simultaneously the average PV panel temperature decreases from 64 (for non-cooled PV) to 24 °C. Also, nozzle to PV panel distance was changed from 10 to 50 cm. The best result was obtained for the lowest distance by 25.86% increase in power output. Study of various frequency also show that due to the surface evaporation and the intensity of the radiation, increasing the water spraying frequency can increase or decrease the electrical efficiency. The On–Off water spray system results show that the maximum increase in efficiency was obtained with frequency of 0.2 Hz which it was 16.84%. Water consumption also decreased to half.

scholarly journals An Experimental Study on Wetting of Coal Dust by Surfactant Solution

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Yidan Jiang ◽  
Pengfei Wang ◽  
Ronghua Liu ◽  
Ye Pei ◽  
Gaogao Wu
Keyword(s):  
Surface Tension ◽  
Contact Angle ◽  
Reverse Osmosis ◽  
Sodium Sulfate ◽  
Moisture Absorption ◽  
Coal Dust ◽  
Pure Water ◽  
Surfactant Solution ◽  
Limited Range ◽  
Dust Reduction

Surfactants can improve the wetting performance of the dust-reduction spraying water, thus improving the dust-reduction effect by spray. In this study, the performance of surfactant solution in wetting coal dust was investigated through experiments. In addition, the effects of surfactant type, mass fraction, metamorphic degree of coal, particle size, and additives were investigated. According to the results of surface tension experiments, the surface tension of the solution decreased with the increase of the concentration of surfactant. However, after reaching CMC, the surface tension did not have significantly decrease. SDBS and OP-10 had higher efficiency in decreasing the surface tension than the other two types of surfactants. The addition of sodium sulfate additives can further reduce the surface tension of the surfactant solution by a limited range. The coal dust wetting experiment showed that with the increase in the concentration of the surfactant, the contact angle of the droplets on the coal dust tablet was continuously reduced, and the wettability of the solution was continuously improved. The wettability of the OP-10 solution was optimal. At the same concentration, the minimum contact angle can be obtained in the OP-10 solution. As the contact angle of the coal dust increased, the growth rate in the coal dust reverse osmosis moisture absorption of the surfactant solution relative to the pure water increased. After the addition of sodium sulfate, the reverse osmosis moisture absorption of coal dust increased to varying degrees. In addition, as the concentration of additives increased, the moisture absorption of coal dust increased.

Explosion Simulation for Petrochemical Plant with Water Spray

2013 ◽  
Vol 634-638 ◽  
pp. 1608-1611
Author(s):  
Ji Wu Yuan ◽  
Xiang Di Zhao ◽  
Zheng Wang
Keyword(s):  
Coal Gasification ◽  
Petrochemical Plant ◽  
Water Spray ◽  
Design And Optimization ◽  
Traditional Assessment ◽  
Spray System ◽  
System A ◽  
Assessment Techniques ◽  
Plant Simulation ◽  
Explosion Risk

Traditional assessment techniques can't predict the explosion with effects of water spray system. A method of explosion simulation which based on FLACS software for Petrochemical plant with water spray were used for simulating the explosion risk of a coal gasification company’s plant. Simulation results indicate that the water spray system can significantly weaken the devices exploded consequences. This method can be used for fire protection system design and optimization of layout for petrochemical plants.

Development and Evaluation of an Onboard Aircraft Cabin Water Spray System for Postcrash Fire Protection

1991 ◽  
Author(s):  
Richard G. Hill ◽  
Constantine P. Sarkos ◽  
Timothy R. Marker
Keyword(s):  
Fire Protection ◽  
Water Spray ◽  
Aircraft Cabin ◽  
Spray System

Fire Resistance of High-Rise Building External Wall Using Water Spray Curtain: An Exploration of Fire Protection Design

2014 ◽  
Vol 935 ◽  
pp. 265-269 ◽  
Author(s):  
Lan Ming Zhao ◽  
Hai Bing Hu ◽  
Heng Ze Zhao ◽  
Jun Qin ◽  
Lan Ming Zhao
Keyword(s):  
Fire Protection ◽  
Discharge Rate ◽  
Water Film ◽  
Water Spray ◽  
Exponential Relationship ◽  
Working Pressure ◽  
External Wall ◽  
High Rise ◽  
High Rise Building ◽  
Spray System

To find out practical design of high-rise building external wall fire protection, a preliminary study of water spray curtain was performed. The characteristic of the spray was analyzed through experiments. Basic characteristics such as exponential relationship between discharge rate and working pressure of the nozzle were obtained. The spread behavior of water film on the wall, such as spread width, was tested and analyzed. Feasible design and apply layout of the spray system on external wall was presented. The probable design was proved to be much more energy-saving than traditional sprinklers. In the end, a workable pattern of application was presented and further explained how the design worked and reduced construction energy.

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