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MSU / Biology / AGR 240 / What is the portion of the internal energy of a system associated with

What is the portion of the internal energy of a system associated with

What is the portion of the internal energy of a system associated with

Description

School: Murray State University
Department: Biology
Course: Thermodynamics
Term: Spring 2017
Tags:
Cost: 50
Description: 1 CHAPTER and General Energy Analysis General EnergyAnalysis Chapter 2, Energy, Energy Transfer Energy, Energy T ransfer and EGR 240 2 V 2 gz   2,e ,e mV 1 2 gz and General Energy Analysis  PE KE Forms of Energy Chapter 2, Energy, Energy Transfer – macoshancmioilnftorosK–i+fomre,U,ratre • Kin•etoctEnttrrE ntElnenEnygygEGR 240actions 3 The portion of The interThe tremendous The internal Sentheis
Uploaded: 07/26/2017
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Enesfer anrgy, Energy Trand General Energy Analysis

EGR 240  Chapter 2, Energy, Energy Transfer and General Energy Analysis      1

  • Kinetic Energy                                
  • Microscopic motion
  • Potential Energy                                
  • Change in elevation
  • Internal Energy
  • Sum of microscopic forms, U, u
  • Total Energy
  •         

  • Energy interactions
  • Heat (Temperature difference)
  • Work
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    The various forms of microscopic energies that make up sensible energy

    Thermal = Sensible + Latent

    internal = Sensible + latent + chemical + Nuclear

    We also discuss several other topics like What is the meaning of nitriles?

  • Fission reactions involve splitting of the uranium atom (the U-235 isotope)into other elements
  • Fission is commonly used to
  • Generate electricity in nuclear power plants
  • Power nuclear submarines and aircraft carriers, and spacecraft
  • Build nuclear bombs
  • Fusion reactions combine two small nuclei into a larger one.
  • Source of solar(stellar) energy
  • Uncontrolled in thermonuclear reactions
  • Efforts to control nuclear fusion for useful energy have failed
  • We also discuss several other topics like What is illustrated by the fluid mosaic model?

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    Figure 2 -5

    Mass and energy flow rates associated with the flow of steam in a pipe of inner diameter D with an average velocity of

    Mass flow rate:                 

    Energy flow rate:                        

    Mechanical energy: The form of energy that can be converted to mechanical work completely and directly by an ideal mechanical device such as an ideal turbine

    Kinetic and potential energy: The form of mechanical energy.

     mechanical energy of a flowing fluid per unit mass

    rate of mechanical energy of a flowing fluid

    Mechanical energy change of a fluid during incompressible flow per unit mass

                    (kJ/kg)

    Rate of mechanical energy change of a fluid during incompressible flow

            (kW)

    Since

            (h)

    Figure 2-12

    Mechanical energy is illustrated by an ideal hydraulic turbine coupled with an ideal generator.

    In the absence of irreversible losses, the maximum produced power is proportional to (a) the change in water surface elevated from the upstream to the downstream reservoir or (b) (close-up view) the drop in water pressure from just upstream to just downstream of the turbine

    Since and         

            (a)

    (with associated energy content)

    Control volume can be changed to mass flow as well as heat and work interactions

  • Volume flow rate - volume fluid that passes through an area per time
  • Mass flow rate - mass of fluid that passes through an area per time
  • (in most fluid dynamics book volume flow rate is annotated as q or Q)

    We will use q and Q for heat transfer

            rh=pQ

  • The energy transferred through an area by mass is the specific energy times the mass flow rate
  • Same for other specific properties
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