FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119803645
Author: Sonntag
Publisher: WILEY
expand_more
expand_more
format_list_bulleted
Videos
Question
error_outline
This textbook solution is under construction.
Students have asked these similar questions
5. (计算题)
Calculate the DOF of following mechanisms. If there are compound hinge, passive DOF or Redundant Constraint, please point
them out.
品
⑤A
(a) 凸轮拨杆机构
6.(计算题)
Calculate the DOF of following mechanisms. If there are compound hinge, passive DOF or Redundant Constraint, please point
them out.
E
D
A
B
C
F
A hot surface at 150°C is to be cooled by attaching 3-cm-long, 0.25-cm-diameter aluminum pin fins (k = 237 W/m-K) to it, with a center-
to-center distance of 0.6 cm. The temperature of the surrounding medium is 30°C, and the heat transfer coefficient on the surfaces is
35 W/m²K. Determine the rate of heat transfer from the surface for a 1-m × 1-m section of the plate. Also determine the overall
effectiveness of the fins.
0.6 cm
0.25 cm
The total rate of heat transfer is
kW.
The fin effectiveness is
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
- Consider a stainless steel spoon (k = 8.7 Btu/h·ft·°F) partially immersed in boiling water at 200°F in a kitchen at 75°F. The handle of the spoon has a cross section of 0.08 in × 0.5 in and extends 7 in in the air from the free surface of the water. The heat transfer coefficient at the exposed surfaces of the spoon handle is 3 Btu/h·ft2·°F. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. A spoon is placed inside the container, such that the distance of the water level from the top end of the handle of the spoon is 7 meters. T sub air is indicated in the region outside the container. Identify the assumptions required to solve the problem. Check All That Apply One-dimensional heat transfer analysis is used to solve the problem. One-dimensional heat transfer analysis is used to solve the problem. Bi-dimensional heat transfer analysis is used to solve the problem. Bi-dimensional heat transfer analysis is…arrow_forwardA turbine blade made of a metal alloy (k=17 W/m-K) has a length of 5.3 cm, a perimeter of 11 cm, and a cross-sectional area of 5.13 cm². The turbine blade is exposed to hot gas from the combustion chamber at 1133°C with a convection heat transfer coefficient of 538 W/m²K. The base of the turbine blade maintains a constant temperature of 450°C and the tip is adiabatic. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Hot gas h=538 W/m²K -Turbine blade k = 17 W/m-K p=11 cm, L=5.3 cm A = 5.13 cm² -T=450°C Determine the heat transfer rate to the turbine blade. W. The heat transfer rate isarrow_forwardConsider a very long, slender rod. One end of the rod is attached to a base surface maintained at Tb, while the surface of the rod is exposed to an air temperature of 400°C. Thermocouples imbedded in the rod at locations 25 mm and 120 mm from the base surface register temperatures of 325°C and 375°C, respectively. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. . x1 32 x Calculate the rod base temperature (°C). The rod base temperature is °C. Air T∞arrow_forward
- A rotating shaft of 20 mm diameter is simply supported. The shaft is loaded with a transverse load of 10 kN as shown in the figure. The shaft is made from AISI 1095 hot-rolled steel. The surface has been machined. The shaft operate at temperature T = 450 °C. Consider a reliability factor of 95%. Determine (a) Calculate the reaction forces R, and R₂ (2 points) (b) Draw the shear force and bending moment diagrams and determine the maximum bending moment and shear force. (6 points) 200 mm 20 mm 10,000 N -50 mm- A Not to scale. (c) Determine the critical location of the shaft and the maximum effective stresses. (3 points) (d) Calculate the safety factor against yielding. Does the shaft undergo local yielding? (2 points) (e) Determined the endurance limit, adjusted as necessary with Marin factors. (12 points) (f) Calculate the fatigue factor of safety based on achieving infinite life. (2 points) (g) If the fatigue factor of safety is less than 1 (hint: it should be for this problem), then…arrow_forward(read image)arrow_forward(read image)arrow_forward
- 6: Refer to the figure.Given: W1 = 200 kN/m; W2 = 300 kN/m; L1 = 2 m; L2 = 3 m; L3 = 2 m(a) Calculate the total length L so that the resulting upward pressureq is uniform. (b) draw the shear and moment diagram and determinethe maximum shear, maximum positive and negative bendingmoments.arrow_forwardA six cylinder, four-stroke diesel engine develops a power of 200 kW at 2000 rpm. The bsfc is 0.2 kW/kg h of fuel with 34.9° API. The fuel is injected at an average pressure of 350 bar and the pressure in the combustion chamber is 40 bar. Assuming Ca for injector 0.75 and the atmospheric pressure 1 bar. Determine the period of injection in seconds if the total orifice area required per injector is 0.4876 × 10-6 m².arrow_forwardTrieed a detailed drawing Win explanatio LL Antsmi 1981x pu + 96252 اه 6. The Pre-combustion chamber design engines employ nozzle type commonly referred to as a ....... a. inward-opening nozzle b. multiple-hole nozzle. c. pintle nozzle. d. none of these. 7. If the temperature of the spark plug tip is less than 350 °C, ......... a. the plug might not work. b. the carbon deposits would increase. 8. Port injection sprays fuel....... c. pre-ignition will occur. d. none of these. a. towards the intake valve. b. in the engine cylinder. c. in the throttle body assembly. d. none of these. 9. When the fuel-air mixture changed from best power to a richer ratio, the spark advance should be........ a. increased. b. decreased. c. left unchanged. d. none of these. d. none of these. 10. Spark plugs are classified as hot plugs and cold plugs depending upon ........ a. spark gap. b. the type of plug c. the operating temperature insulator. range of the electrode tip. ---20125 750 x2.01 SP 5.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Refrigeration and Air Conditioning Technology (Mi...Mechanical EngineeringISBN:9781305578296Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill JohnsonPublisher:Cengage Learning
Refrigeration and Air Conditioning Technology (Mi...
Mechanical Engineering
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:Cengage Learning
The Refrigeration Cycle Explained - The Four Major Components; Author: HVAC Know It All;https://www.youtube.com/watch?v=zfciSvOZDUY;License: Standard YouTube License, CC-BY