How Much Power Does a Pump Need to Move Water Adiabatically?

In summary, the conversation is about a pump being used to move water through a pipe and the task of determining the power required by the pump using the steady flow energy equation. The water has a temperature of 18℃ and a pressure of 100 kPa (Absolute), and moves up a vertical distance of 3 m before exiting at atmospheric pressure. The process is assumed to be adiabatic and frictionless, with a required mass flow rate of 3.1 kg/s. The questioner is seeking assistance with this problem.
  • #1
Jack Easton
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HOMEWORK PROBLEMS REQUIRE USE OF HOMEWORK TEMPLATE. THIS WAS ORIGINALLY POSTED IN WRONG FORUM.
I have been struggling with this question for a while, please could somebody help?
A pump is used to move water through a short pipe of diameter 120 mm as shown in Figure Q2. The water has a temperature of 18℃ and a pressure of 100 kPa (Absolute). The pump moves the water up a vertical distance of 3 m and the water exits to atmospheric pressure. Assuming the process is adiabatic and frictionless, and the required mass flow rate is 3.1 kg/s, determine, using the steady flow energy equation, the power required by the pump.

thanks
 
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  • #2
Is there a Figure Q2 which can be posted?
 
  • #3
this is figure Q2
 

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Jack Easton said:
I have been struggling with this question for a while, please could somebody help?

A pump is used to move water through a short pipe of diameter 120 mm as shown in Figure Q2. The water has a temperature of 18℃ and a pressure of 100 kPa (Absolute). The pump moves the water up a vertical distance of 3 m and the water exits to atmospheric pressure. Assuming the process is adiabatic and frictionless, and the required mass flow rate is 3.1 kg/s, determine, using the steady flow energy equation, the power required by the pump.

thanks

Have you written the steady flow energy equation for this system?
 

1. What is thermodynamics?

Thermodynamics is the branch of physics that deals with the study of energy and its transformations, particularly in relation to heat and work. It is a fundamental area of science that helps us understand how energy is transferred and converted in various systems and processes.

2. What are the laws of thermodynamics?

The laws of thermodynamics are fundamental principles that govern energy and its transformations. There are four laws of thermodynamics, but the first two are the most commonly referenced.

  • The first law states that energy cannot be created or destroyed, only transformed from one form to another.
  • The second law states that the total entropy of a closed system will always increase over time, or remain constant in ideal cases where the system is in a state of equilibrium.

3. How does thermodynamics apply to everyday life?

Thermodynamics plays a crucial role in understanding everyday phenomena, such as the functioning of engines, refrigerators, and air conditioners. It also helps us understand the transfer and conversion of energy in biological systems, chemical reactions, and weather patterns.

4. What is the difference between heat and temperature in thermodynamics?

Heat and temperature are often used interchangeably, but they have distinct meanings in thermodynamics. Heat is a form of energy that is transferred from a hotter object to a cooler one, while temperature is a measure of the average kinetic energy of molecules in a substance. In other words, heat is the transfer of energy, and temperature is a measure of the amount of energy present.

5. Can thermodynamics be violated?

The laws of thermodynamics are considered fundamental and universal principles, and they cannot be violated. They have been extensively tested and found to hold true in all physical processes and systems. However, there are scenarios where the laws may appear to be violated, but upon closer examination, they are found to be consistent with the laws of thermodynamics.

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