Design and Performance Analysis of Blades Based on the Equal–Variable Circulation Method

With the aim of improving the aerodynamic performance of axial turbomachinery, a new type of blade is designed using the equal–variable circulation method. Taking an axial flow fan as the research object, this article describes the development of a new type of turbomachinery by changing the design method and producing a blade with forward sweep. The aerodynamic performance of the fan is simulated and compared with the experimental data. The numerical results show that the equal circulation design method improves the aerodynamic performance of the blade roots, while the variable circulation design method enhances the aerodynamic performance of the blade tips. By adopting the equal–variable circulation design method, the total pressure of the experimental fan is increased by about 4%, while the efficiency remains unchanged. Forward-swept blades with an equal–variable circulation design also improve performance over the conventional blades by changing the center-of-gravity stacking line. At low flow rates, the efficiency of the experimental fan can be increased by 7.5%, and the working range of the flow is expanded. Under high flow rates, the restriction of the blade tip on the airflow is decreased and the fluidity is slightly reduced.

A study on the electrolyte circulation effect of Mg-air battery

The theoretical discharge energy density of the Mg-Air battery, which is attracting attention as a next-generation battery, was modelled and the efficiency of electrolyte circulation was compared. After that, 180kWh class power facility was built using Mg-Air batteries, and the effect of electrolyte removal according to the circulation method was compared and investigated.

A facile freeze-thaw ultrasonic assisted circulation method of graphite flakes prepared by anode graphite from spent lithium-ion batteries for application in nanofluids

Graphite has been widely used as the anode material in lithium-ion batteries (LIBs) due to its good conductivity, layered crystal structure, high charging-discharge potential, and other characteristics. With the rapid...

DISINFECTING PROPERTIES STUDY OF POLYCLEAN AGENT FOR DISINFECTION CONDUCTION IN POULTRY PROCESSING INDUSTRY

The results have been presented of disinfecting properties study of Polyclean agent at the base of quarternary ammonium compound. Usage the agent has been proved to be effective for equipment and room disinfection 0.5-0.6% solution in slaughtering department, 0.6% in sanitary slaughtering department based on 0.5 l/ m2, 0.5% in sausage department based on 0.3 l/m2 with irrigation method at 20 min exposure; technologic equipment when machine is on with circulation method 0.5% solution at 10 min exposure. Working solutions have no corrosion action towards stainless steel that is applied for equipment making at poultry processing enterprises. The solutions are being washed well from the surfaces being treated.

Simulation of the circulation method for discharging viscous petroleum products

Background: In the domestic market, the consumption of fuel oil increases during the winter period, leading to higher prices. At the same time, the cost of inputs and the time for the discharge of viscous oil products are greatly increased. The duration of the discharge process is related to the physico-chemical properties of the fuel oil. Its viscosity depends on the temperature of the product itself and the temperature of the environment, which in our country averages 5.5 C per year. Aim: Reduction in the length and cost of transport of viscous petroleum products. Methods: The article proposes a new method for the carriage of viscous petroleum products by rail, ensuring that their fluidity is preserved without the use of thermal insulation of the boiler of the tank-wagon and the means for carrying the heating. Simulation models of the processes of pouring out viscous petroleum products for a traditional and new method of pouring in the circulation method of discharge of viscous petroleum products, which make it possible to estimate the quantity of resources consumed, are constructed. Results: The work shows the peculiarities of the existing process of discharging viscous petroleum products. Simulation and functional-cost analysis of the discharge process were carried out under the circulatory method for heating viscous petroleum products. The results were compared. Conclusion: In the new pouring method, the discharge process is similar to the summer period.

Anti-freeze Application in Fire Extinguishing Facility Piping for a Warehouse Building

This study aims to test the effect of temperature-rise on fire extinguishing facility piping by means of the flow method using an antifreeze solution and the circulation method by the heat of the pump to secure. The results of the experiment showed that the insides of the pipe freeze at -7 ℃ at a concentration of 20% antifreeze and -4 ℃ at 10%. When tested with the flow velocity of the antifreeze maintained at 1 m/s and concentrations of 20%, 10%, and 0%, the temperatures rose by 1.8 ℃, 0.6 ℃, and 1.7 ℃, respectively. At a velocity of 2 m/s, the temperatures rose by 2.1 ℃, 3.1 ℃, and 0.9 ℃. In addition, the circulation method test, by operating of the pump, increased the temperature by 1.2 ℃ with a pressure of 0.9 kgf/cm² and flow rate of 120 LPM. The pressure of 2.5 kgf/cm² and flow rate of 200 LPM increased the temperature by 2.7 ℃. Finally, a novelfreeze protection method was proposed to maintain the setup above freezing point due to the friction heat generated between the impeller of the pump and water.

Well Control using Drill Sim (One Circulation)

The Usage Of Petroleum In Daily Life Have Increased Much Where The Petroleum Industry Also To Be Develop To Match With The Need. Drilling, An Task Where Petroleum Is Pointed And The Location Is Drilled To Take Out The Petroleum And Petroleum Sub Products From Subsurface To The Surface. Drilling A Well Is Not Also An Easy Way It Have To Meet Some Problems Due To Formation Pressure, Hydrostatic Pressure Etc., To Maintain The Well And To Get Out The Petroleum Well Control Technique Were Used In The Industry. Well Control Means To Prevent The Kick And Safe Guard The Instruments And Peoples Working On The Well. There Were Two Methods To Control The Well, They Were One Circulation Method And Two Circulation Method. In This Paper I Used The Ari Drilling Simulator With Assumed Values And Run One Circulation Method And Finally Observing The One Circulation Method Results ,Given My Conclusion.