1. Pay attention to the oil level in the compressor oil sight glass of the cold storage refrigeration equipment, ensuring it stays within the specified range. If the compressor runs low on oil, it can seize, damage the shaft, or cause motor-related chain faults.
2. Voltage phase loss, overload, current protection, and delayed protection must be installed in cold storage refrigeration equipment. The sensitivity and quality of electrical protection components directly affect the compressor's lifespan. When installing and commissioning cold storage refrigeration equipment, the temperature should be controlled by the thermostat and pressure controller so that the compressor stops and starts fewer than six times an hour, runs for more than five minutes each time, and stops for at least three minutes each time.
3. Non-condensable gases in cold storage refrigeration equipment should not exceed 2% of the volume. Vacuuming cannot be done manually during operation; use a vacuum pump from the system's high-pressure side for more than 20 minutes.
4. The refrigeration cycle system must be kept strictly dry. Especially for seamless steel pipes used as evaporators, there should be no rust, and no organic compounds, metal debris, cleaning agents, acids, or moisture should remain.
5. After the cold storage refrigeration equipment starts running, regularly check the oil level. Replace the refrigerant oil after the first month of operation, then annually thereafter.
6. Reliable and sensitive electrical control components, temperature and pressure controllers help reduce compressor faults.
7. Check that the power supply voltage and ambient temperature are within the specified range.
8. When the cold storage refrigeration compressor is not used for a long time, the refrigerant should be recovered into the liquid receiver and the discharge stop valve closed.

The key difference between a controlled atmosphere storage and a regular cold storage is that the freshness logic is completely different: a regular cold storage just slows down spoilage with low temperatures, while a controlled atmosphere storage precisely adjusts the gas composition inside on top of the low temperature, suppressing the respiration of fruits and vegetables from the root and extending their freshness several times.

The thermal load determines the required capacity of the cold room refrigeration unit, and a mistake in this calculation can cause 20% to 40% extra energy consumption or failures due to lack of power. Heat loss through the walls and ceiling of the room accounts for 30% to 45% of the total thermal load of the refrigeration system. The value depends on the thickness of the polyurethane sandwich panel; for freezing rooms, a minimum thickness of 120 mm is recommended, with thermal conductivity below 0.024 W/(m·K). This parameter limits heat transfer from the outside environment to the inside of the cold room. The thermal load from stored products makes up 35% to 50% of the total demand of industrial refrigeration equipment.
When placing hot products in a cold storage room, each tonne of product needs up to 8 kW of cooling power to lower the temperature from 25 °C to -18 °C in 24 hours. Xindacool includes this calculation in its custom cooling system designs for global projects. Air entering through door openings accounts for 10% to 20% of the thermal load in frequently used cold rooms. Each 2 m² door opening allows 120 m³/h of warm air from a 38 °C environment to enter, adding 1.2 kW to the thermal load. Using air curtains can cut this infiltration by up to 75%. Internal heat from fans, lights, and workers adds 5% to 10% of the total cooling system load. A 0.75 kW evaporator fan generates constant heat while running, and each person in the chamber adds 280 W of thermal load. This factor is often ignored in basic designs. Outdoor temperature directly affects the condenser unit's performance. In desert areas with temperatures of 45 °C, the cooling capacity of an industrial chiller can drop by up to 18%, so the unit needs to be oversized by 20% to ensure the target temperature. Xindacool develops setups adapted for high-temperature climates. The frequency of product in and out affects the cold room's stability. In logistics facilities with more than 30 daily openings, the thermal load increases by 22% compared to rooms with fewer than 5 daily openings. The design must account for this workflow to avoid temperature deviations. Choosing the right refrigerant also impacts the energy efficiency of commercial cooling units. Low GWP refrigerants reduce environmental impact and meet EU regulations, maintaining over 95% of cooling capacity in standard operating ranges. The choice should follow the local regulations of the destination country. The thermal load calculation should include a minimum 10% safety margin for seasonal variations. Without this, in summer months the system won't maintain the set temperature, causing product loss and increased compressor failures. The integrated cooling solution design service considers all these factors before production. The factory runs digital thermal simulations to validate capacity, energy consumption, and operating range under real project conditions before manufacturing the cold storage unit. ### Frequently Asked Questions 1. What happens if I calculate a thermal load lower than the actual one? The unit won't maintain the temperature, and compressor wear will increase by 40%. 2. What PU panel thickness do I need for a -18°C room? 120 mm is recommended, with thermal conductivity below 0.024 W/(m·K).
3. How to reduce air infiltration load? Installing air curtains can cut the inflow of warm air by up to 75%. 4. Is a safety margin needed in the calculation? Yes, at least 10% to cover summer temperature peaks. 5. Does Xindacool offer free thermal load calculations for projects? Yes, it includes thermal simulation in the initial assessment. 6. Does outside temperature affect the chiller's capacity? Yes, at 45°C the capacity drops by up to 18% without special design. 7. How much heat does an operator generate inside the cold room? Each operator contributes around 280 W of thermal load. 8. What is the main source of thermal load in cold rooms? Products introduced at a higher temperature than storage. >>> Keywords naturally included: cold room refrigeration unit, industrial refrigeration equipment, customised refrigeration system, industrial chiller, commercial refrigeration unit, cold storage room, refrigeration solution, cooling capacity, CE certified, Xindacool