Understanding Pump Selection and Efficiency

🔍 To find a suitable pump, we need to consider the required flow rate and head rise.

🌊 There are two options for pump selection: Grundfos and Taco.

💡 The desired flow rate is 0.1 cubic meters per second, equivalent to 1585 US gallons per minute. The head rise is 80.27 meters or 263 feet.

🔍 The video discusses the process of selecting pumps for specific applications.

💡 The pumps mentioned in the video have varying power requirements, impeller diameter, efficiency, and suction/discharge line sizes.

📏 The video points out the importance of properly sizing piping for the selected pumps.

📈 The efficiency of the pumps decreases as we move down the list.

🗺️ Operating points that are further down the list are outside the intended range.

🔍 The KS 80 16 pump is the most efficient and a potential good choice.

💡 The head flow curve shows the pump's output head at different flow rates.

🔴 The red point indicates the suggested operating point for the pump.

🔄 Different impeller sizes can affect the flow rate and head of the pump.

📊 Based on the design flow rate, a 16.5-inch pump would result in an output head of approximately 280 feet.

⬇️ Using a smaller impeller, such as a 15-inch or 14-inch, would decrease the output head to around 235 feet and under 200 feet respectively.

🔍 To achieve the desired flow rate, a larger impeller should be chosen, possibly by milling down a 16.5-inch impeller to a slightly smaller diameter.

💡 The graph represents the relationship between power, head, and flow rate in pump selection.

⚡ Operating below maximum efficiency, the pump requires a specific amount of power to drive the desired flow.

📈 By optimizing the operating point, higher efficiency levels of up to 84% can be achieved.

📊 The required ND SH for the pump is around 15 feet based on the design flow rate.

💡 The specifications recommend an NPS H of 16 feet, which is close to the calculated value.

⚙️ The operating point of the pump requires a horsepower between 125 and 150 with 80% efficiency.