How to verify whether the flow rates of circulating water and chilled water are sufficient

Taking circulating water as an example, its main function is heat exchange and cooling. The heat exchange area, water temperature, flow rate, and other parameters should have been determined by the design team; new equipment will certainly perform well. It is important to pay attention to daily maintenance, as issues such as changes in the system’s structure or the accumulation of sludge can significantly reduce the efficiency of heat exchange, leading to changes in various parameters such as the flow rate of water.

The method for starting up the circulating water in new projects is as follows: 1. Close all the inlet/exit valves of the coolers on various equipment, slightly open the main return water valve (about 10%), and fully open the main return water valve. 2. Before starting the water pump, close the outlet valve completely and open the inlet valve completely. Start the water pump behind people. Within the rated range of the viewing current, gradually increase it to the rated current. Then it’s just waiting. When the total return water pressure is equal to the pump outlet pressure, it is possible to conduct a pressure test by pumping water to each equipment cooler separately, step by step ； 3. Slightly open the return water valves of each cooler; allow water to flow out from the coolers’ exhaust ports, and then slightly open the inlet valves of each cooler. When the pressure test of each cooler after filling it with water is successful. The main circulating water valve can be turned off completely. Verify the pressure of each cooler again until it meets the process requirements. The above methods can ensure that operations remain under control in the event of a sudden leakage issue. (Note: On-site guidance is required; free on-site assistance can be provided.)

If it’s a new factory, a comprehensive plan needs to be developed for the use of recycled water; everyone should sit together to analyze the situation and then implement the plan accordingly – after all, it’s about pooling everyone’s ideas.

Comply with the circulating water standards. Pressure differences in the coolers of various systems, blockages by debris, anti-freezing measures, etc.

The main circulating water pipeline is usually equipped with flow and pressure transmitters. To avoid disputes over water usage among different areas, flow meters are also installed in each area; this enables the formulation of a strategy for circulating water supply, determining how much water should be supplied to each area and thus determining how many pumps need to be operated.

Thank you, zone flow meters are very important

Taking chilled water as an example, fill the system with water, start the circulation pump, and open all the usage points; then check whether the cooling rate of each cooling device is sufficient to achieve the desired cooling effect； Pay attention to the temperature of the chilled water; if it is too low and causes the system to freeze, it will be problematic. Thank you

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If there are so many sensors, it is best to collect data on the inlet and outlet flow rates, as well as pressure and temperature, of the cooling water on a daily basis.

Chilled water generally does not freeze at around 4°C when cooled by lithium bromide refrigeration