FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119634928
Author: Borgnakke
Publisher: WILEY
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
error_outline
This textbook solution is under construction.
Students have asked these similar questions
Wrong or incomplete solution will be downvoted.
Show the Clear work.
solve the (1st) question only
5.72 A cold air chamber is proposed for quenching steel ball
bearings of diameter D = 0.2 m and initial temperature
T₁ = 400°C. Air in the chamber is maintained at -15°C
by a refrigeration system, and the steel balls pass
through the chamber on a conveyor belt. Optimum
bearing production requires that 70% of the initial ther-
mal energy content of the ball above -15°C be
removed. Radiation effects may be neglected, and the
convection heat transfer coefficient within the chamber
is 1000 W/m².K. Estimate the residence time of the
balls within the chamber, and recommend a drive veloc-
ity of the conveyor. The following properties may be
used for the steel: k = 50 W/m K, a = 2 x 105 m²/s,
and c = 450 J/kg.K.
Ball
bearing
-5 m
Cold air
Belt
V
Chamber
housing
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Item 1 1 of 5 II Review Part A A flow-through electric water heater has a 22 kW electric heater inside an insulated 2.0-cm-diameter pipe so that water flowing through the pipe will have good thermal contact with the heater. Assume that all the heat energy is transferred to the water. Suppose the inlet water temperature is 12°C and the flow rate is 8.0 L/min (about that of a standard shower head). What is the outlet temperature? Express your answer in degrees Celsius. ? Tout = °C Submit Request Answer Provide Feedback Next >arrow_forwardsolve, show all steps and solutions. list assumptions and concluding comment heat transfer. show resistor diagram for Rs as well use k aluminum = 177 and k carbon steel = 60.5arrow_forwardShow neat and clear workarrow_forward
- Please include free body diagram and please don't typearrow_forwardPls. Answer... A steam engine boiler is maintained at 250°C and water is converted into steam. This steam is used to do work and heat is ejected to the surrounding air at temperature 300K. Calculate the maximum efficiency it can have in percent?arrow_forwardA chain block is known to have an efficiency of 45 % when raising a load with a mass of 600 kg. The large pulley has 28 slots and the smaller pulley has 25. Calculate for this load; 4.1 the mechanical advantage, and 4.2 the effort required.arrow_forward
- Calculate the height of a chimney required to produce a draught equivalent to 1.7 cm of water it the flue gas temperature is 270°C and ambient temperature is 22°C and minimum amount of air per kg of fuel is 17 kg.arrow_forwardI need the answer as soon as possiblearrow_forwardHome work: 1- A belt 100 mm wide and 8 mm thick are transmitting power at a belt speed of 160 m/ min the angle of lap for smaller pulley is 165 ° and the coefficient of friction 0.3 , the max- kg/m, find the power permissible stress 2 m2 MN and the mass of the belt is 0.9 rarrow_forward
- Can you please show the work of solving eq 2 and 4 and what you are subbing into each equation?arrow_forward2.) One thousand kilograms of dressed chicken enter a chiller at 10°C are frozen and chilled to a final temperature of -15 °C for storage in 24 hours. The specific heats are 4.34 kJ/kg-K above and 3.32 kJ/kg-K below freezing, respectively. The latent heat is 220 kJ/kg and the freezing temperature is - 2.8°C (Compute the product load in kW.arrow_forwardA hot water heater is using a heat pump system for heating the water, as shown in the figure. The system heats 40 liters per min of water form 20 C to 60 C. The heat pump has a coefficient of performance (COP) of 4. Calculate: A-Rate of transfer of heat to the water B- The power requirement of the heat pump C-If the heat pump operates 10 hours a day, calculate the amount of energy use of the heat pump in per month.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Principles of Heat Transfer (Activate Learning wi...Mechanical EngineeringISBN:9781305387102Author:Kreith, Frank; Manglik, Raj M.Publisher:Cengage Learning
Principles of Heat Transfer (Activate Learning wi...
Mechanical Engineering
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Cengage Learning
Understanding Conduction and the Heat Equation; Author: The Efficient Engineer;https://www.youtube.com/watch?v=6jQsLAqrZGQ;License: Standard youtube license