1. What is a Water Transfer Pump? Core Principles & Key Parameters

A water transfer pump moves liquids using mechanical force, based on centrifugal or positive displacement principles. Key parameters:

a. Flow Rate (GPM/L/min): Determine throughput (typically ≥ 80 L/min in new energy scenarios)

b. Head (m/ft): Max vertical lift (high-pressure models up to 150m)

c. Suction Lift (m): Max self-priming depth (DC pumps ≤5m)

d. Voltage (V): 12V/24V/36V DC (for energy storage), 380V AC (industrial)

Formula: Head = dynamic head + static head + friction loss (calculated via Darcy-Weisbach equation)

2. Selection Criteria for 2025 Scenarios

a. DC Voltage Scenarios Match Table

b. DC Pump Selection Formula (Energy Storage)

Q = (Heat Load kW × 3600) ÷ (Coolant Cp × ΔT × Density)Example: 50kW heat load, ethylene glycol (Cp=4.2kJ/kg·℃, density=1070kg/m³), ΔT=5℃Q = (50×3600) ÷ (4.2×5×1070) ≈ 7.84 m³/h = 130.7 L/min

3. Deep answers to high-frequency problems

Q1: Can a 12V DC pump be used in high-pressure liquid cooling?

Yes, with:

a. Pressure booster module (up to 8 bar)

b. DC-DC converter (12V→24V step-up)

c. Case: 50m head achieved in energy storage with 12V pump + valve

Q2: How to calculate DC pump energy consumption?

Formula:kWh = Power(W) × Hours ÷ 1000

Efficiency adjustment: Actual power = Nominal power / Efficiency (e.g., 200W ÷ 0.9 = 222W)

Q3: DC vs AC pump maintenance differences?

Q4: How to prevent cavitation in server pumps?Three Steps:

a. Suction pipe ≥2x pump inlet diameter

b. Install NPSH sensor (set ≥3m)

c. Use deionized water coolant

Q5: Can 12V pump work with 24V power supply?

No. Direct connection will overload and potentially burn out the motor. Use a step-down module (e.g., DC-DC converter) to reduce 24V to 12V first.

Q6: How to improve liquid cooling pump efficiency?

a. Match parameters: Ensure the pump’s flow rate/pressure meets system requirements.

b. Optimize piping: Reduce bends and shorten pipe length to minimize resistance.

c. Low-viscosity coolant: Use high-fluidity liquids (e.g., water or specialized coolant).

d. Regular maintenance: Clean filters, prevent blockages, and check for leaks.

e. Speed control: Adjust pump speed based on demand to save energy.

f. Stable power supply: Ensure voltage stability to avoid performance fluctuations.

Keep it simple and practical—avoid overloading and energy loss to enhance efficiency.

4. Key New Energy Applications

a. Energy Storage Thermal Management (24V DC)

  i. System: Centrifugal pump + redundancy control + plate heat exchanger

  ii. Specs: 150 L/min, 40m head, -30℃~85℃

  iii. Energy Saving: Auto-reduces flow to 50% at low load

b. Industrial Chiller Circulation (36V VFD)

 i. Advantages:

  (a) 10-100% variable flow

  (b) COP-based dynamic head adjustment

 ii. Savings: 28% energy reduction ($1200/year)