1. A brass rod 100 mm long and 5 mm in diameter extends horizontally from a...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
1. A brass rod 100 mm long and 5 mm in diameter extends horizontally from a casting at 200°C. The rod is in an air environment with T = 20 °C and h = 30W/m².K. a) What is the temperature of the rod 25, 50 and 100 mm from the casting? Assume that the fin tip is adiabatic. In addition to the temperatures along the fin, also determine the heat flow through the rod, the fin effectiveness, and the fin efficiency. b) Suppose that this single brass rod is attached to a casting surface that is 10 cm by 10 cm square. What is the rate of heat flow to the air from the exposed area of the casting surface (qunfin)? What is the total heat flow from the surface and the rod to the air (qtotal)? c) Compute the volume of the brass rod. Suppose we take this volume of brass and fabricate an array of 100 rectangular fins that are 0.5 mm thick and 10 cm wide (see Figure 3.21a). Using this information, determine the fin pitch S and fin length L. d) Based on the array dimensions from part (c), determine the rate of heat flow rate from the casting to the air through the fin array. 1. A brass rod 100 mm long and 5 mm in diameter extends horizontally from a casting at 200°C. The rod is in an air environment with T = 20 °C and h = 30W/m².K. a) What is the temperature of the rod 25, 50 and 100 mm from the casting? Assume that the fin tip is adiabatic. In addition to the temperatures along the fin, also determine the heat flow through the rod, the fin effectiveness, and the fin efficiency. b) Suppose that this single brass rod is attached to a casting surface that is 10 cm by 10 cm square. What is the rate of heat flow to the air from the exposed area of the casting surface (qunfin)? What is the total heat flow from the surface and the rod to the air (qtotal)? c) Compute the volume of the brass rod. Suppose we take this volume of brass and fabricate an array of 100 rectangular fins that are 0.5 mm thick and 10 cm wide (see Figure 3.21a). Using this information, determine the fin pitch S and fin length L. d) Based on the array dimensions from part (c), determine the rate of heat flow rate from the casting to the air through the fin array.
Expert Answer:
Related Book For
Fundamentals of Heat and Mass Transfer
ISBN: 978-0471457282
6th Edition
Authors: Incropera, Dewitt, Bergman, Lavine
Posted Date:
Students also viewed these mechanical engineering questions
-
A brass rod 100 mm long and 5 mm in diameter extends horizontally from a casting at 200e. The rod is in an air environment with T = 20C and h = 30 W/m2 K. What is the temperature of the rod 25, 50,...
-
An electrical heater 100 mm long and 5 mm in diameter is inserted into a hole drilled normal to the surface of a large block of material having a thermal conductivity of 5 W/m K. Estimate the...
-
A cylindrical rod 100 mm long and having a diameter of 10.0 mm is to be deformed using a tensile load of 27,500 N. It must not experience either plastic deformation or a diameter reduction of more...
-
Extend the model of this chapter by assuming that the firms cost function has the form C(X,E) satisfying assumption 5.1. (a) Derive the second-best optimal combination of an emission standard (no...
-
Consider the ozonolysis of trans-4,5-dimethylcyclohexene having the configuration shown Structures A, B, and C are three stereoisomeric forms of the reaction product. (a) Which, if any, of the...
-
If computer software is increasingly able to detect writing errors, can business communicators stop studying writing techniques? Why or why not?
-
Read this section again to make sure that you understand fully the formulae in Table 15.2. Try to produce a diagram for direct labour similar to that drawn in Figure 15.4 for direct materials. Note...
-
A recent article found that Massachusetts residents spent an average of $860.70 on the lottery in 2010, more than three times the U.S. average (www.businessweek.com, March 14, 2012). A researcher at...
-
Assignments The following Assignments should be completed and submitted to the course faculty via the learning platform for evaluation and grading. Submit your responses to these questions in one...
-
The Irwin Batting Company manufactures wood baseball bats. Irwin's two primary products are a youth bat, designed for children and young teens, and an adult bat, designed for high school and...
-
What is the whole debate about Aggregate Demand creating Supply versus Aggregate Supply Creating Demand? Which view do you see in your everyday experience? Why does this debate continue? Thinking...
-
What can organizations do within legal and ethical bounds to learn from other organizations?
-
Explain the concept of remote workers. Explain the challenges of managing remote teams . Reference on each challenge, and text citation please
-
Identify the steps in settling an industrial dispute and explain.
-
How are WHS participative requirements managed? More detail is needed. Participative requirements includes HSCs and HSRs. Think also in terms of consultation, training and communication with workers.
-
Analyze key trends in health care and determine two factors that cause these trends to affect human resource managers and employees. Provide specific examples to support your rationale.
-
Are disagreements, conflicts, and tension natural parts of healthy organizations? Why or why not? What are the results of poorly handled confrontations? What are the results of positive...
-
Suppose that a flow network G = (V, E) violates the assumption that the network contains a path s t for all vertices V. Let u be a vertex for which there is no path s u t. Show that there must...
-
Consider the two parallel, coaxial, ring-shaped disks shown schematically. Show that Fiz can be expressed as where all view factors on the right-hand side of the equation can be evaluated from Figure...
-
To slow down large prime movers like locomotives a process termed dynamic electric braking is used to switch the traction motor to a generator mode in which mechanical power from the drive wheels is...
-
A stream of atmospheric air is used to dry a series of biological samples on plates that are each of length L i = 0.25 m in the direction of the airflow. The air is dry and at a temperature equal to...
-
You are considering buying a bottle of wine. Suppose that the euro appreciates by 15% with respect to the U.S. dollar. Are you more or less likely to buy a bottle of Californian wine or French wine?
-
A German sports car is selling for 65,000. What is the dollar price in the United States for the German car if the exchange rate is 0.80 euro per dollar?
-
What are the main criteria for choosing a policy instrument? Why? Explain.
Study smarter with the SolutionInn App