Understanding the refrigeration system is essential for anyone working with high and low temperature test chambers, as it is the core component that enables these devices to achieve extreme temperature conditions. This chapter provides a detailed explanation of how the refrigeration system functions within such equipment. In a single-stage refrigeration cycle used in high and low temperature test chambers, R404A is commonly employed as the refrigerant. At atmospheric pressure, its evaporation temperature is -46.5°C. However, due to the typical 10°C temperature difference between the air-cooled condenser and the chamber, the lowest achievable temperature is usually around -36.5°C. If lower temperatures are required for testing purposes, the evaporation pressure can be reduced, allowing the evaporation temperature to drop to as low as -50°C. It’s important to note that as the evaporation temperature decreases, so does the evaporation pressure. When the temperature becomes too low, some common refrigerants may reach their freezing point, which prevents proper flow and circulation. Additionally, lower evaporation pressure increases the volume of the refrigerant, reducing the mass flow rate. To maintain the required cooling capacity, the compressor must handle a larger volume of refrigerant, which could lead to an oversized compressor. The refrigeration system in high and low temperature test chambers not only cools but also dehumidifies the environment inside the chamber. The same system can operate in two different modes, depending on the test requirements. Users can customize parameters and test methods, making the system highly adaptable. Proper use of the system ensures efficient and accurate results. The operation manual or instructional videos provided by Shanghai Shangyu make it easy for users to understand and operate the equipment effectively. Whether you're conducting thermal stress tests, material evaluations, or environmental simulations, a well-designed refrigeration system is crucial for achieving consistent and reliable outcomes. Understanding its principles helps users optimize performance and avoid potential issues during operation. Packaging Tube,Portable Packaging Tube,Portable Test Tube,Pre Roll Tubes NANTONG OUFEIYA IMP& EXP CO.,LTD , https://www.nantongoufeiya.com