Nаdоgrаdnjа sistеmа zа hlаđеnjе vоdоm sа mоgućnоstimа ispirаnjа

2021 ◽  
Vol 23 (2) ◽  
pp. 48-56
Author(s):  
Valentino Stojkovski ◽  
◽  
Viktor Iliev ◽  
Filip Stojkovski
Keyword(s):  
Cooling System ◽  
Cooling Water ◽  
Operating Parameters ◽  
Cfd Analysis ◽  
Water Cooling ◽  
Rolling Mills ◽  
Structural Part ◽  
Flow Channels ◽  
Water Cooling System

This paper presents an analysis of the operating parameters of a water cooling system of the structural part of a furnace for rolling mills preparation. The structural solution of the cooling system is performed as flow, with a constant inflow of fresh water and drainage from the system. Four longitudinal pipes are installed, which are supported by vertical girders. Vertical girders should provide thermal stability to ensure pipe- plate horizontality. The vertical girders are regularly connected to the cooling system by placing pipes direct into the vertical girder, which engages the part of the water supply that cools the vertical girder, and the same water is returned to the cooling system and continuously transferred to the next girder. During operation, due to the quality of cooling water that is not chemically treated, calcium carbonate is formed; the presented impurities clog the flow channels of the cooling system in the vertical girders. The application of CFD analysis reveals the conditions of water flow in the cooling system of vertical girders. From the analysis of the obtained results, it is proposed to upgrade the existing system by installing a flushing system, which will ensure a directed and controlled inflow in the zones of the cooling system. The conceptual solution for the flushing system and the effects of its operation are given in this paper.

scholarly journals Some Considerations for EM Cooling Systems

1997 ◽  
Vol 5 (6) ◽  
pp. 18-21
Author(s):  
Allan Mitchell
Keyword(s):  
Electron Microscope ◽  
Water Temperature ◽  
Cooling System ◽  
Cooling Water ◽  
Chloride Concentration ◽  
Closed Circuit ◽  
Water Cooling ◽  
High Chloride Concentration ◽  
Local Water ◽  
Water Cooling System

For numerous reasons a closed-circuit water cooling system is the preferred option for providing cooling water to the electron microscope. Cooling water is required by the electron microscope to cool the diffusion pumps and to keep the electronics' and coiumn temperature stable.A closed-circuit water cooling system is essential if the local water supply has a high chloride concentration, has floating particles, is acidic, has a water temperature that fluctuates and is uncontrollable. This potentially leads to specimen drift problems in the TEW, and/or has a water temperature that is very cold. This potentially leads to condensation problems or diffusion pumps not functioning properly in the TEM.

Casing Distortion of GE Frame 3 Gas Turbines

2003 ◽  
Author(s):  
Ryan D. Mitchell ◽  
Henry L. Bernstein ◽  
Peggy L. Talley
Keyword(s):  
Gas Turbines ◽  
Oil And Gas ◽  
Cooling System ◽  
Cooling Water ◽  
Oil And Gas Industry ◽  
Water Systems ◽  
Water Cooling ◽  
Gas Industry ◽  
Turbine Casing ◽  
Water Cooling System

A study of casing distortion in General Electric MS3002 gas turbines used in the oil and gas industry revealed significant distortion for MS3002 Models C through G. The primary distortion problem was ovalization of the turbine casing, which could occur in either the horizontal or vertical directions. Malfunctioning of the water cooling system, or improper disassembly and assembly procedures can cause casing distortion. The MS3002 Models A-G gas turbines have water cooled turbine casings, and malfunctioning of their cooling water systems, regardless of distortion, is also a significant problem.

scholarly journals Numerical simulation of thermal diamond filter for working station 1-5 of synchrotron “SKIF“

2021 ◽  
Vol 2119 (1) ◽  
pp. 012130
Author(s):  
V A Vinokurov ◽  
V V Vinokurov ◽  
O A Kabov
Keyword(s):  
Cooling System ◽  
Cooling Water ◽  
Maximum Temperature ◽  
Water Cooling ◽  
System Configuration ◽  
Total Heat Release ◽  
Radiation Heat ◽  
Mini Channels ◽  
Radiation Heat Exchange ◽  
Water Cooling System

Abstract Numerical 3D-simulations of thermal loads of thermal diamond filter for the working station 1-5 of synchrotron “SKIF” has been performed. An efficient version of a water-cooling system of a CVD diamond by means of mini-channels in copper flanges with a total heat release power of 1290 W is presented. The influence of various configurations of the cooling system, different boundary conditions (thermal insulation, radiation heat exchange), water supply pressure on the maximum temperature in diamond wafer has been investigated. The influence of the temperature dependence of the properties of diamond glass has been studied. The maximum temperature on the diamond wafer is found to be 317.6 °C absorbing 1290 W of power correspond to the safe mode for some specific cooling system configuration. The corresponding flow rate of 7 °C cooling water was 13.1 l/min.

Experiments of Electronic Water Cooling System on Different Inlet Type and with/without Vortex Fin inside

2014 ◽  
Vol 1051 ◽  
pp. 881-885
Author(s):  
Feng Chin Tsai ◽  
Jen Ching Huang
Keyword(s):  
Heat Generation ◽  
High Power ◽  
Heat Dissipation ◽  
Cooling System ◽  
Cooling Water ◽  
Water Cooling ◽  
Water Cooling System

This study mainly investigates the influence of electronic water cooling system on high power heat generation device at different cooling water inlets with vortex fins or not, hence, heat dissipation experiments are going to carried out on the conditions of three cooling cases: hollow case I, hollow case II and vortex-fin case. From this experiment, it can be seen that the heat dissipation efficiency of hollow case I is reduced by 10% as compared to that of hollow case II, and the heat dissipation efficiency of vortex-fin case is also reduced by 10% as compared to that of hollow case I, that is, water cooling system with vortex-fin has very excellent effect on heat dissipation.

Evaluation of Water Cooling System of 1.5MW Rotor Based on CFD

2012 ◽  
Vol 472-475 ◽  
pp. 386-390
Author(s):  
Ming Qin ◽  
Hai Tao Dai ◽  
Ming Wei Ge
Keyword(s):  
Fluid Dynamics ◽  
Thermal Conductivity ◽  
Heat Exchange ◽  
Cooling System ◽  
Cooling Water ◽  
Water Cooling ◽  
Design Requirement ◽  
Computational Fluid Dynamics Cfd ◽  
Water Cooling System ◽  
Cooling Pipes

The water cooling system of 1.5MW rotor is evaluated using Computational Fluid Dynamics (CFD). 48 cooling holes are opened on the rotor stator to arrange the water cooling pipes, the temperature of inlet of the cooling water is 50 C with the velocity 1.2m/s. It is found that the air gap between the cooling pipes and holes on the stator hinders the heat exchange extensively. For this reason, the cooling system can't meet the design requirement. In order to solve this problem, the pourable silicone is filled in the gap between the cooling pipes and holes to enhance thermal conductivity. Based on this idea, ten kinds of piping arrangements are proposed, among which, nine kinds can achieve the cooling requirement.

scholarly journals Identification of radionuclides in cooling circuit of Cyclone 18/9-HC

2020 ◽  
Vol 64 (4) ◽  
pp. 477-484
Author(s):  
A. Ya. Maliborskiy ◽  
P. V. Tylets ◽  
D. I. Brinkevich ◽  
S. D. Brinkevich ◽  
V. V. Sinaiko
Keyword(s):  
Cooling System ◽  
Specific Conductivity ◽  
Cooling Water ◽  
Absorbed Dose ◽  
Water Cooling ◽  
Annual Dose ◽  
Radiation Dose Rate ◽  
Cooling Circuit ◽  
Gas Targets ◽  
Water Cooling System

In the present work the patterns of relationship of photonic radiation dose rate from Cyclone 18/9HC water cooling system were studied at production of positron-emitting nuclides. Reaction (n, p) was shown to be the main source of activation nuclides in cyclotron cooling water at 18F production, resulting in formation of 16N (T1/2 = 7 s) from 16О. In water targets with high accumulated dose, when beam partially irradiates a target body, proton-induced reactions: 16О(p, α)11С and 18О(p, n)18F take place. Fluoride 18F–, carbonate 11СО32– and hydrocarbonate Н11СО3– anions, formed in proton-induced activation reactions, efficiently precipitate on anion-exchanging resin during water circulation resulting in circuit purification from the named radionuclides. Activation of cooling water does not occur at irradiation of gas targets. Projected annual dose for cyclotron operator from cooling water activation is less than 1 % of annual dose limit for personnel from technogeneous radioactive sources. In order to minimize operator`s accumulated doses it is recommended to decrease the duration of personnel activities at the distance less than 1 meter from heat exchanger during 18F production. At operation of water targets with absorbed dose higher than 2500 μA·h it is desirable to conduct the preventive maintenance of water cooling system not earlier than in half an hour after the end of irradiation and with mandatory dosimetry control. To decrease the activation of impurities it is essential to use only deionized water in cooling circuit. In case of its specific conductivity increase due to corrosion the coolant should be replaced promptly.

Multi-Objective Optimization Analysis of Motor Cooling System in Articulated Dump Truck

2011 ◽  
Vol 383-390 ◽  
pp. 4715-4720
Author(s):  
Yan Zhang ◽  
Yan Hua Shen ◽  
Wen Ming Zhang
Keyword(s):  
Field Distribution ◽  
Cooling System ◽  
Dump Truck ◽  
Water Cooling ◽  
Multi Objective Optimization ◽  
Multi Objective ◽  
Pareto Optimal Set ◽  
Temperature And Pressure ◽  
Water Cooling System ◽  
Optimal Set

In order to ensure the reliable and safe operation of the electric driving motor of the articulated dump truck, water cooling system is installed for each motor. For the best performance of the water cooling system, not only the heat transfer should be enhanced to maintain the motor in relatively low temperature, but also the pressure drop in the water cooling system should be reduced to save energy by reducing the power consumption of the pump. In this paper, the numerical simulation of the cooling progress is completed and the temperature and pressure field distribution are obtained. The multi-objective optimization model is established which involves the cooling system structure, temperature field distribution and pressure field distribution. To improve the computational efficiency, the surrogate model of the simulation about the cooling process is established based on the Response Surface Methodology (RSM). After the multi-objective optimization, the Pareto optimal set is obtained. The proper design point, which could make the average temperature and pressure drop of the cooling system relative desirable, is chosen from the Pareto optimal set.

Sign in / Sign up

Export Citation Format

Share Document