The synthetic ice machine system requires frequent ammonia replenishment, resulting in poor condensation performance.
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Our company’s newly launched ammonia synthesis project has an annual production capacity of 60,000 tons. Since driving in November 2011, there has been a problem with poor condensation performance of the ice machine. We use screw chillers; the oil temperature remains very high, and oil refilling is necessary frequently. The fuel consumption is extremely high. Liquid ammonia has been added frequently in recent days. For three consecutive days, about 3 tons of liquid ammonia were added each day.
At least the oil-based solution isn’t effective; there is frequent oil leakage, which may end up reaching the condenser, increasing the temperature difference for heat exchange and thus reducing the efficiency of condensation. Which company’s ice machine is it?
We had an accident here once, similar to what you described. “The fuel consumption is very high, and the condensation efficiency of the chiller is poor; there’s a leak in the chiller’s oil supply system. The oil leakage was extremely severe; it seemed like over 60 barrels of oil were lost in total, and it wasn’t until later that the issue was identified. Finally, we started with the cold ammonia pump and found that there was oil accumulation on the pump inlet filter. Take this as a reference. I hope this helps you.
For screw refrigerators, it is essential to pay attention to the cooling effect of the circulating oil; by lowering the temperature of this oil, the separation efficiency of impurities improves under the same conditions. Avoid bringing refrigerant oil into the evaporative condenser, as this can affect heat exchange efficiency.
It’s winter at Yantai Binglun; since evaporation cooling is not in use and no water is added, air cooling is employed instead
What type is that oil cooler?
Our oil coolers use shell-and-tube heat exchangers, with liquid ammonia as the cooling medium.
If the pressure in the storage tank is high, venting is necessary; this is because ammonia mixed with oil increases the heat exchange load, and the oil adhering to the inside of the pipes reduces the heat transfer coefficient. If there is no emission, the heat exchanger might be leaking.
The heat exchanger is leaking............................
Take measures to lower the temperature of the refrigeration cycle oil, enhance its oil-cooling effect, and clean the oil coolers and condensers.
It’s likely that the oil cooler for the ice machine has failed, causing ammonia and oil to leak out; check the circulating water as well.