How to Calculate Back Pressure in a 24" Sparge Pipe?

In summary, the conversation is about designing a 24" sparge pipe for transporting hot water over a distance of 60 ft. The liquid in the pipe is water with a flow rate of 3010 m^3/hr and pipe diameter of 2.032 mts. The person is asking about calculating the back pressure and wondering if it is necessary to determine if the flow is laminar or turbulent. They also mention finding an equation for back pressure online and questioning its validity. The problem is for a Rotary Breaker project, where hot water is used to break down solids in a cylindrical section. The person also mentions using online calculators to help with the calculation.
  • #1
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Hello All,

Problem Statement :
  • This is for design of a 24" sparge pipe for transporting hot water (85 deg C) for over 60 ft.
  • Asked to calculate the Back pressure

Data :
  • Liquid in the pipe: water
  • Flow rate : 3010 m^3/hr = 0.83611 m^3/sec
  • Pipe Dia : 24" = 2.032 mts
  • No elbows throughout 60 ft length


How do I go about this calculation ?
  1. Do I first find out if its laminar flow or turbulent flow
  2. How to arrive at back pressure equations ?
  3. Found a link "www.harcomanufacturing.com/docs/Backpressure%20CalculatorP.xls" : that gives an equation which I have never come across in any internet searches before. Is that how Back pressure is calculated

Background of the problem:
This is for a Rotary Breaker project where we have a 24" Sparge Pipe that is sprays hot water onto the huge chunks of solids being processed inside a rotary breaker. Rotary breakers belong the screening family ; where the machine breaks the solids inside a giant cylindrical section (this project ; 16ft Dia) and keep screening the materials as the go forwards in length. Water is used to form a semi slurry state to help fascilitate the breaking
 
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  • #2

Related to How to Calculate Back Pressure in a 24" Sparge Pipe?

1. What is back pressure in a pipe?

Back pressure in a pipe is the measure of resistance or force exerted on the fluid flowing through the pipe in the opposite direction of the flow. It is caused by obstructions, bends, or changes in the diameter of the pipe.

2. How does back pressure affect the flow of fluid in a pipe?

Back pressure can reduce the flow rate of fluid in a pipe by creating resistance against the flow. This can cause inefficiency in pumping systems and may result in decreased performance of the system.

3. What factors contribute to back pressure in a pipe?

Several factors can contribute to back pressure in a pipe, including the length and diameter of the pipe, the type of fluid being transported, and any obstructions or restrictions in the pipe.

4. How can back pressure be measured in a pipe?

Back pressure in a pipe can be measured using a pressure gauge installed at a specific point in the pipe. The gauge will display the amount of pressure being exerted on the fluid in the pipe.

5. What are the potential consequences of high back pressure in a pipe?

High back pressure in a pipe can lead to decreased flow rate, increased energy consumption, and potential damage to the pipe and pumping system. It can also cause problems such as cavitation and water hammer, which can damage equipment and decrease the lifespan of the system.

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