scholarly journals Numerical Simulation of the Air Cooling System for Scientific Payload Rack on a Space Station

Energies ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 6145
Author(s):  
Yuan-Yuan Lou ◽  
Ben-Yuan Cai ◽  
Yun-Ze Li ◽  
Jia-Xin Li ◽  
En-Hui Li
Keyword(s):  
Numerical Simulation ◽  
Cooling System ◽  
Space Station ◽  
Thermal Control ◽  
Physical Models ◽  
Air Cooling ◽  
Ansys Fluent ◽  
System A ◽  
Air Cooling System ◽  
Scientific Payload

The space scientific payload rack is a multifunctional experimental platform, and the requirements of the environmental temperature index are different for diversified experimental modules inside. The air cooling system is an important part of the rack thermal control system. A new type of air cooling system with small size and flexible arrangement is proposed in this paper, that is, micro air ducts with pinhole-sized air vents. The rack physical models of new and traditional air cooling modes are established, respectively. The numerical simulation of the inner air flow is carried out by Ansys Fluent CFD software (Ansys Inc., Canonsburg, PA, USA), which verifies that compared with the traditional method, the temperature field and flow field of the new air cooling method are more uniform, and the heat sources located at the edge of the rack can also be cooled better.

Numerical Simulation on the Temperature Characteristics of Indirect Air Cooling System

2015 ◽  
Vol 741 ◽  
pp. 536-540
Author(s):  
Xiao Zhi Qiu ◽  
Yan Ming Zhao ◽  
Bao Hua Huang ◽  
Wei Xu
Keyword(s):  
Numerical Simulation ◽  
Wind Speed ◽  
Cooling System ◽  
System Change ◽  
Temperature Characteristic ◽  
Air Cooling ◽  
Ansys Software ◽  
System A ◽  
Air Cooling System ◽  
Simulation Results

Based on the analysis of indirect air cooling system, a numerical simulation model of indirect air cooling system was constructed by ANSYS software. According to the different wind speed condition, the temperature characteristic of indirect air cooling system was analyzed. The simulation results show that with the increase of wind speed, the ventilation and heat release of the indirect air cooling system change greatly. It provides a theoretical basis for the design of the wind-proof device of indirect air cooling system.

scholarly journals Optimization of Air Cooling System Using Adjoint Solver Technique

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3753
Author(s):  
Grzegorz Czerwiński ◽  
Jerzy Wołoszyn
Keyword(s):  
Heat Source ◽  
Heat Sink ◽  
Cooling System ◽  
Geometric Model ◽  
Maximum Temperature ◽  
Air Cooling ◽  
Ansys Fluent ◽  
Source Temperature ◽  
Heat Source Temperature ◽  
Air Cooling System

Air cooling systems are currently the most popular and least expensive solutions to maintain a safe temperature in electronic devices. Heat sinks have been widely used in this area, allowing for an increase in the effective heat transfer surface area. The main objective of this study was to optimise the shape of the heat sink geometric model using the Adjoint Solver technique. The optimised shape in the context of minimal temperature value behind the heat sink is proposed. The effect of radiation and trapezoidal fin shape on the maximum temperature in the cooling system is also investigated. Simulation studies were performed in Ansys Fluent software using the Reynolds—averaged Navier–Stokes technique. As a result of the simulation, it turned out that not taking into account the radiation leads to an overestimation of temperatures in the system—even by 14 ∘C. It was found that as the angle and height of the fins increases, the temperature value behind the heat sink decreases and the heat source temperature increases. The best design in the context of minimal temperature value behind the heat sink from all analysed cases is obtained for heat sink with deformed fins according to iteration 14. The temperature reduction behind the heat sink by as much as 25 ∘C, with minor changes in heat source temperature, has been achieved.

scholarly journals Air Conditioning System using Air Cycle Machine (ACM) A Qualitative Validation

2019 ◽  
Vol 8 (6) ◽  
pp. 170-172
Keyword(s):  
Air Conditioning ◽  
Cooling System ◽  
Air Cooling ◽  
Air Conditioner ◽  
Cooling Process ◽  
Ansys Fluent ◽  
Air Conditioning System ◽  
Air Conditioners ◽  
Air Cooling System ◽  
Air Conditioning Systems

The work is aimed to replace conventional refrigerants used in air cooling system with Air Cycle Machine (ACM). Commercial Air-conditioners uses the refrigerants (Freon-Gas cycle) to remove the indoor air from the room. Freon leakage causes health problems such as respiratory ailments, heart attack and circulatory collapse. Air conditioning systems made based on desiccants. Refrigerant poisoning results in Throat swelling, loss of vision, blood vomiting, blood in the stool, severe abdominal pain and even death is possible. This can be overcome by using air cycle cooling process instead of Freon as a phase changing material. Air Cycle Machine is the system used in aircraft cabin pressurization and cooling system which does not uses refrigerants in the cooling process. The analytical work carried out in this paper is to study the air conditioning system using Air Cycle Machine and investigate the air flow inside the room by giving the various inlet temperatures and the inlet velocity of the Air-conditioner. ANSYS-FLUENT 16.0 is used for the analytical study. A cabin enclosure was modeled and analyzed for different inlet temperatures and velocities and out coming cool air spread nature for the given conditions have been observed. The qualitative results of this study clearly evident the usage of Air Cycle Machine (ACM) is prominently reduces the room temperature than the refrigerant system and spreads the cool air throughout the enclosed room makes a comfortable environment and this would not leads to any health hazards. Thus this study is certain to use Air Cycle Machine (ACM) for the cabin cooling system rather than refrigerants.

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