Cooling water consumption of the pump

The amount of cooling water required for a pump can be estimated based on the following factors: 1. Pump power: Generally, the higher the power of the pump, the greater the amount of cooling water needed. 2. Pump operation time: The longer the pump runs, the greater the amount of cooling water required. 3. Ambient temperature: When the ambient temperature is high, the pump requires more cooling water to lower its temperature. 4. Operating conditions: The amount of cooling water required by the pump varies depending on the operating conditions. For example, under high-pressure, high-temperature, or high-speed operation, the pump’s demand for cooling water may increase. Regarding the specifications and standards for cooling water consumption, **the standard ‘Energy Efficiency Limits and Grades for Pumps’ (GB19761-2017) sets requirements for the energy efficiency of pumps, but does not specify the amount of cooling water required. In practical applications, it is possible to refer to the product manuals provided by the manufacturer or consult professional engineers to obtain a more accurate estimate of the cooling water requirement. .

The cooling water for pump units is divided into those used for mechanical seals and those used for the system pumps and motors. 1. Commonly used in mechanical seal systems are PLAN21/23/52/53A/53B/62. The value for PLAN21 is determined by the seal system manufacturer based on specific requirements (usually 0.5–4 M3/h); for the other options, I generally use a value of 0.5 m3/h ； 2. The flow rate of each branch pipe of the pump is approximately 0.5 m3/h; simply add up the flow rates of all the branch pipes ； 3. Follow the motor drawing ；

The API standards specify this; there are no requirements regarding flow rate, and it needs to be calculated based on the heat exchange area and temperature. But in practice, the flow rate can be adjusted using valves to achieve a satisfactory temperature, right?