Temperature control during cold operation of circulating water cooling
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For various reasons, this unit has not been operated this year. The circulating water system is functioning properly; the pressure and flow rates entering each heat exchange device are controlled according to the design specifications. Chemicals are added to the water based on the analysis results to maintain its quality at acceptable levels. However, as temperatures in the north continue to drop, the temperature of the circulating water is only around 6 degrees, with a temperature difference of just 0.2 degrees. There is concern that the circulating water might freeze due to these low temperatures. I have a few questions for fellow sailors: 1. Are there any good methods to heat the circulating water in this situation? 2. What other issues should be taken into consideration when operating under these conditions?
It remains in a fluid state and will not freeze.
Also, the circulation volume can be appropriately reduced.
Would reducing the circulation rate lead to accelerated corrosion?
The so-called reduction in circulation volume should refer to the moderate closing of the inlet and outlet valves for the cooling water in the heat exchanger (condenser)； The overall temperature will also rise, and less steam will be required. However, it is important to ensure that the water flow rate is not too low, otherwise sedimentation and corrosion issues may occur
Maintain circulation and supplement steam condensate in appropriate amounts.
Okay, several steam condensate lines have been connected now
The reason for reducing the circulation volume is to increase the temperature of the circulating water; this temperature is certainly lower due to a reduced load on the circulating water system
Does your circulating water system have a cooling tower? You can direct a portion of the return water directly into the circulation tank, thereby reducing the amount of circulating water that enters the tower.