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@Afghan_Engineer • 43,519 subscribers

Electrical Engineer | Digital Creator | Creating videos & pics, explaining science, engineering, renewable energy & climate change. Electrical 🧵 everyday.

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Stop guessing cable size.

Stop guessing cable size.

258,438 просмотров

How to calculate the power required for a water pump. 1. Pump system The diagram shows a pump moving water from the suction side to the discharge side. H = Head: The height/distance the pump must lift the water. Suction: Where water enters the pump. Discharge: Where water leaves the pump. 2. Formula The formula used is: Where: P = Pump power in watts (W) ρ (rho) = Fluid density, for water 1000 kg/m³ g = Gravity, 9.81 m/s² Q = Flow rate in m³/s H = Pump head in meters η (eta) = Pump efficiency as a decimal 3. Given values The example gives: Flow rate Q = 75 m³/hour Head H = 30 m Water density ρ = 1000 kg/m³ Efficiency η = 70% = 0.70 First, convert the flow rate from m³/hour to m³/second: 4. Calculation Putting the values into the formula: This gives approximately: or: 5. Final answer The calculated pump power is 8.75 kW. In practical pump selection, you would normally choose a motor with some safety margin, so a motor larger than 8.75 kW may be selected depending on the pump's actual performance, starting conditions, and manufacturer specifications.

How to calculate the power required for a water pump. 1. Pump system The diagram shows a pump moving water from the suction side to the discharge side. H = Head: The height/distance the pump must lift the water. Suction: Where water enters the pump. Discharge: Where water leaves the pump. 2. Formula The formula used is: Where: P = Pump power in watts (W) ρ (rho) = Fluid density, for water 1000 kg/m³ g = Gravity, 9.81 m/s² Q = Flow rate in m³/s H = Pump head in meters η (eta) = Pump efficiency as a decimal 3. Given values The example gives: Flow rate Q = 75 m³/hour Head H = 30 m Water density ρ = 1000 kg/m³ Efficiency η = 70% = 0.70 First, convert the flow rate from m³/hour to m³/second: 4. Calculation Putting the values into the formula: This gives approximately: or: 5. Final answer The calculated pump power is 8.75 kW. In practical pump selection, you would normally choose a motor with some safety margin, so a motor larger than 8.75 kW may be selected depending on the pump's actual performance, starting conditions, and manufacturer specifications.

17,176 просмотров

Water level indicator.

Water level indicator.

33,767 просмотров

A simple DIY 3.7V li-ion battery charger circuit.

A simple DIY 3.7V li-ion battery charger circuit.

34,430 просмотров

Proximity sensor.

Proximity sensor.

18,933 просмотров

Bridge rectifier.

Bridge rectifier.

27,435 просмотров

IR proximity sensor circuit Used an infrared LED to send out invisible light & a receiver to detect reflections. When an object comes close, the reflected IR light is sensed and the circuit gives an output signal. It’s commonly used for obstacle detection and automatic systems.

IR proximity sensor circuit Used an infrared LED to send out invisible light & a receiver to detect reflections. When an object comes close, the reflected IR light is sensed and the circuit gives an output signal. It’s commonly used for obstacle detection and automatic systems.

19,811 просмотров

Current leads voltage in inductor. Voltage lags current in capacitor. No phase difference between current and voltage in resistor.

Current leads voltage in inductor. Voltage lags current in capacitor. No phase difference between current and voltage in resistor.

25,036 просмотров

Carlo Anceloti after that Rodrygo goal. @rodrygogoes001 Real Madrid C.F. Real Madrid C.F.en

Carlo Anceloti after that Rodrygo goal. @rodrygogoes001 Real Madrid C.F. Real Madrid C.F.en

42,849 просмотров

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1.5mm2 thin wire for lights vs air conditioner.

1.5mm2 thin wire for lights vs air conditioner.

211,612 просмотров • 2 дней назад

This is why transformers hum.

This is why transformers hum.

15,889 просмотров • 6 дней назад

There is no single value for every installation. A common target is ≤5Ω, while sensitive systems may require ≤1Ω. The correct value depends on the earthing system, fault protection, soil, and applicable electrical standards. Lower resistance = better fault-current path.

There is no single value for every installation. A common target is ≤5Ω, while sensitive systems may require ≤1Ω. The correct value depends on the earthing system, fault protection, soil, and applicable electrical standards. Lower resistance = better fault-current path.

19,359 просмотров • 9 дней назад

Solar light tracker circuit.

Solar light tracker circuit.

22,026 просмотров • 17 дней назад

Ohm's law as linear equation.

Ohm's law as linear equation.

78,483 просмотров • 2 месяцев назад

Learn how to use multimeter to check appliances like a Pro.

Learn how to use multimeter to check appliances like a Pro.

61,220 просмотров • 7 месяцев назад

Inverter space vector PWM.

Inverter space vector PWM.

30,231 просмотров • 5 месяцев назад

Electronic components.

Electronic components.

22,526 просмотров • 4 месяцев назад

The PIC16F877A is an 8-bit microcontroller designed to execute control logic and manage peripheral data in embedded systems. It is primarily used in industrial automation, robotics, and consumer electronics to interface with sensors and control mechanical components.

The PIC16F877A is an 8-bit microcontroller designed to execute control logic and manage peripheral data in embedded systems. It is primarily used in industrial automation, robotics, and consumer electronics to interface with sensors and control mechanical components.

17,642 просмотров • 4 месяцев назад

Shortcircuit protector.

Shortcircuit protector.

16,853 просмотров • 6 месяцев назад

Automatic ON/OFF float switch.

Automatic ON/OFF float switch.

14,948 просмотров • 7 месяцев назад

Flip flop light bulb circuit

Flip flop light bulb circuit

14,896 просмотров • 8 месяцев назад

The journey from fuel --> to light

The journey from fuel --> to light

12,109 просмотров • 7 месяцев назад

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