How to calculate the cooling capacity of an ammonia-cooled chiller
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Our company’s flow rate of gas fed into the low-temperature methanol wash process is 120,000 m3/h, with a CO2 content of 44%. An ammonia-refrigerated system is used for cooling; how should the cooling capacity be calculated? That is, what power rating should the ammonia compressor have?
Let me explain my thinking. Hope this helps a bit! 1. See how many quenchers you have ； 2. Monitor the heat released by methanol or other fluids entering and leaving the quench cooler ； 3. The heat released is the load on the ice machine.
By knowing the flow rate of methanol, the amount of temperature drop, along with a certain margin, it is possible to calculate it
The main thing to consider is how large your methanol circulation volume is – how many chillers are connected to one ammonia cooler compressor?! The power of the compressor is determined based on the volume of air entering the compressor and the specifications of the driving steam you choose~! Ammonia cooler compressors generally use two stages with 5 or 6 stages~!
We designed it for 400,000 tons; the current gas flow rate is 150,000 Nm per hour, and the designed power of the ammonia compressor is 5,000 kilowatts.
Is the OP’s CO2 level 44%? Isn’t it too high? Then you’ll have very little effective air left
The cooling capacity is calculated based on the methanol flow rate and temperature difference in each ammonia cooler used in the methanol washing process, but this is only a theoretical value; various cooling losses also need to be taken into account. Does anyone know what percentage should be applied for these cooling losses?
We produce 480,000 tons, using an propylene compressor with a power of 5,800 KW, in two stages with 7 compressors each