In the aerospace industry, it is critical to ensure the reliability and stability of components. To meet this need, low-temperature screw chillers have become an indispensable piece of test equipment. In this article, we will discuss the importance of low-temperature screw chillers in aerospace component testing and their wide range of applications in this field.
Table of contents:
1.What is a low-temperature screw chiller?
2.What are the classifications of low-temperature screw chillers?
3.What are the advantages of a low-temperature screw chiller?
4. Aerospace Component Testing Requirements
5.What factors need to be considered when choosing a low-temperature screw chiller?
1.What is a low-temperature screw chiller?
Generally speaking, we refer to refrigeration units with a water discharge temperature below 0°C as low-temperature chiller units. According to the different forms of compressors, they can be categorized into scroll, piston, and screw. Therefore, the screw chiller with a water outlet temperature below 0℃ is categorized as a low-temperature screw chiller unit. In the industrial field, to meet the needs of some special production lines for low-temperature environments, Kassel usually provides customized solutions according to the specific needs of customers, with the lowest water discharge temperature reaching -45℃.
2.What are the classifications of low-temperature screw chillers?
2.1 Water cooled screw chiller
By combining it with a cooling water system (e.g. cooling water tower, water pump, etc.), the heat inside the unit will be transferred to the cooling water system and discharged, to achieve the purpose of cooling the target equipment. Suitable for industrial places with sufficient water resources and large cooling demand
2.2 Air cooled screw chiller
adopts air as the cooling medium, transmits the heat to the surrounding air through the built-in fan, and then discharges the heat through natural convection or other means to realize the purpose of cooling. No additional cooling water system is required, and installation and maintenance are simple.
3.What are the advantages of a low-temperature screw chiller?
Low water discharge temperature: 0℃~-45℃, cooling capacity ranging from 100kw~3000kw, suitable for application scenarios with low-temperature refrigeration demand.
Stable operation: low-temperature screw chiller has stability in temperature control, pressure control, refrigeration capacity, operating noise, energy consumption, and other aspects. Take temperature control and pressure control stability as an example. If the temperature control is not stable, the temperature of the refrigerant may fluctuate, resulting in an unstable refrigeration effect, affecting the quality of products or productivity in the industrial manufacturing process. Unstable pressure not only affects the refrigeration effect but also leads to frequent starting and stopping of the industrial chiller, increasing energy consumption
High efficiency and energy saving: low-temperature screw chiller adopts a semi-closed screw compressor with a built-in economizer, which can realize continuous energy infinitely adjustable. That is, according to the actual demand for cooling capacity to adjust the flow of refrigerant. When the external environment for the cooling capacity demand is large, the economizer will increase the flow of refrigerant; when the external environment for the cooling capacity demand is small, the economizer will reduce the flow of refrigerant, to avoid energy waste due to the transitional operation of the refrigeration unit.
Smooth operation and low noise: the system adopts a high and low differential pressure lubrication oil system, the efficiency of oil separation can reach 99.99%, and it also has the function of absorbing the noise of the unit. Therefore, the unit is characterized by smooth operation and low noise.
Built-in multiple protections: the screw chiller contains internal leakage reverse phase protection, oil pressure differential protection, high and low-pressure protection, water system protection, anti-freeze protection, and compressor overheating overload protection, these safety protection devices in the screw chiller is very important, which can effectively protect the safety of the equipment and personnel, and at the same time to ensure the normal operation and stability of the screw chiller
4. Aerospace Component Testing Requirements
Aerospace components may face extreme temperature conditions during actual use, such as high-altitude cooling or very low temperatures in the space environment. To ensure the performance and reliability of components under these extreme conditions, it is necessary to simulate extremely low-temperature environments in testing, to assess whether the mechanical properties, fatigue resistance, and corrosion resistance of these components meet the requirements under extreme temperature environments and whether the performance parameters of electronic components will change. In electronic equipment testing, for example, many electronic component performance parameters, such as resistance, capacitance, inductance, conductivity of semiconductor devices, etc., are closely related to temperature. That is, under different temperature conditions, the electrical properties, stability, and response speed of electronic components may change. If a low-temperature chiller is not used for simulation tests in a low-temperature environment, it is impossible to accurately assess the stability and reliability of electronic equipment under different temperature conditions in actual use.
5.What factors need to be considered when choosing a low-temperature screw chiller?
Refrigeration load: the industrial chiller model selected according to the required refrigeration capacity, the following are some common low-temperature screw chiller models (due to the different cooling capacities of the industrial chiller under different water discharge temperature conditions, the water discharge of the following products are all based on -10℃)
50 ton chiller: under the condition of -10℃ water discharge temperature, the cooling capacity of the 50 ton chiller is about 175kw, which is suitable for the application of medium-sized refrigeration demand.
200 ton chiller: 200ton chiller with a cooling capacity of 703kw, suitable for aero-engine test benches, spacecraft test chambers
500ton chiller: the cooling capacity of the 500 ton chiller is about 1758kw, which is suitable for application scenarios with large refrigeration load demand.
Quality and reliability: you can evaluate the cooling and reliability of the product from the raw material of the industrial chiller, design, service life, warranty period, manufacturer's industry experience, project cases, and other dimensions
Technical support and after-sales service: consider whether the technical support and after-sales service provided by the supplier is timely and reliable to ensure the smooth operation of the equipment and the timely resolution of failures.
To summarize, the industrial chiller is essential for testing aerospace parts. The low-temperature environment provided by the low-temperature screw chiller enables the aerospace industry to simulate extreme environments such as space and high altitude during the ground testing stage, evaluate the performance of parts under extreme conditions, and identify potential problems and solve them in advance. This not only helps to improve the reliability and safety of aerospace equipment but also reduces testing costs and risks and accelerates the product development cycle. Kassel is an excellent industrial chiller manufacturer, specializing in providing customers with one-stop cooling solutions.
Post time:Sep-25-2020
