System Components of a Cooling System
10 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the assumption made about the air?

  • Constant specific heats at 20 K
  • Constant specific heats at 300 K (correct)
  • Variable specific heats at 300 K
  • Constant specific heats at 25 K

    • What is the value of Cp, w for water?

  • 1.005 kJ/kg·K
  • 2.50 kJ/kg·K
  • 4.18 kJ/kg·K (correct)
  • 3.33 kJ/kg·K

    • What is the equation for the energy balance in the system?

  • E in - E out = ΔE system
  • E in = E out (correct)
  • E in × E out = ΔE system
  • E in + E out = ΔE system

    • What is the ratio of the mass flow rates of air to water?

    <p>1 kg air / 3.33 kg water</p> Signup and view all the answers

    What is the temperature difference between the initial and final states?

    <p>25 K</p> Signup and view all the answers

    What is the value of Cp, air for air?

    <p>1.005 kJ/kg·K</p> Signup and view all the answers

    What is the unit of the energy transfer rate?

    <p>kW</p> Signup and view all the answers

    What is the assumption made about the water?

    <p>Incompressible fluid with constant specific heat</p> Signup and view all the answers

    What is the ratio of the heat capacities of water and air?

    <p>Cp, w / Cp, air = 4.18 / 1.005</p> Signup and view all the answers

    What is the value of mw in the problem?

    <p>3.33 kg/s</p> Signup and view all the answers

    Study Notes

    Exercise 1-1: Work Done by Air Flowing Through a Turbine

    • High-pressure air at 1300 K flows into an aircraft gas turbine and undergoes a steady-state, steady-flow, adiabatic process to the turbine exit at 660 K.
    • The work done per unit mass of air flowing through the turbine is calculated using the conservation of energy equation: Wout = ṁ (h1 - h2).
    • The work done by the air per unit mass flow is equal to the enthalpy decrease of the air.
    • Using the air tables, the work done is calculated as wout = 103.9 kJ/kg.

    Exercise 1-3: Steam and Cold Water Flow Rates

    • Steam at 0.2 MPa, 300°C, enters a mixing chamber and is mixed with cold water at 20°C, 0.2 MPa, to produce 20 kg/s of saturated liquid water at 0.2 MPa.
    • The conservation of mass equation is applied: ṁ1 + ṁ2 = ṁ3.
    • The conservation of energy equation is applied: ṁ1h1 + ṁ2h2 = ṁ3h3.
    • The required steam and cold water flow rates are calculated as ṁ1 = 2.82 kg/s and ṁ2 = 17.18 kg/s.

    Exercise 1-4: Air and Water Flow Rates in a Heat Exchanger

    • Air is heated in a heat exchanger by hot water, with a 20°C drop in temperature.
    • The conservation of mass equation is applied: ṁair,1 + ṁw,1 = ṁair,2 + ṁw,2.
    • The conservation of energy equation is applied: ṁair(hair,1 - hair,2) = ṁw(hw,2 - hw,1).
    • The ratio of mass flow rate of air to mass flow rate of water is calculated as ṁair / ṁw = 3.33.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    This quiz covers the main components of a cooling system, including air and water inlets, control surfaces, and exit points.

    More Like This

    Cooling System Quiz
    12 questions

    Cooling System Quiz

    CaptivatingRubellite avatar
    CaptivatingRubellite
    Condensers and Cooling Water Circulation Systems Quiz
    10 questions

    Condensers and Cooling Water Circulation Systems Quiz

    MesmerizedWalrus avatar
    MesmerizedWalrus
    Introduction to Battery Thermal Management System
    15 questions

    Introduction to Battery Thermal Management System

    FeatureRichRiver avatar
    FeatureRichRiver
    Pengenalan kepada Sistem Penyejukan
    19 questions

    Pengenalan kepada Sistem Penyejukan

    UnfetteredJudgment4439 avatar
    UnfetteredJudgment4439
    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser