A radiator plate of 0.2-m (wide) x 0.4-m (height) is in a room of 22C. One...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
A radiator plate of 0.2-m (wide) x 0.4-m (height) is in a room of 22C. One side (the hot side facing the room) of the radiator plate is maintained at a temperature of 80C, the other sides are assumed to be insulated, as shown in Figure 1. If the following assumptions can be made: 1) steady operating conditions exist; 2) the air an ideal gas; 3) the local' atmospheric pressure is 1.00 atm: (a) Briefly and qualitatively analyze the four different locations for the radiators marked A), B), C) and D), as shown in Figure 1, and rank them in terms of heat transfer efficiency by natural convection. (b) Determine the rate of heat transfer from the radiator plate by natural convection if the plate is A) vertical and C) horizontal with the hot surface facing down. Compare the two and provide a brief discussion of the findings. wall A 0.4 mi C 0.4 m 0.4 m B floor ceiling 0.4 m wall Nu Nu=0.59Ra Nu-0.1 Raa 0.387Ral Nu- - {0.825 + 11 + (0.492/Pr)162) (complex but more accurate) Use vertical plate equations for the upper surface of a cold plate and the lower surface of a hot plate Replace g by g cose Nu-0.54Ra Nu-0.15Ra Nu = 0.27Ral for Ra < 10 A radiator plate of 0.2-m (wide) x 0.4-m (height) is in a room of 22C. One side (the hot side facing the room) of the radiator plate is maintained at a temperature of 80C, the other sides are assumed to be insulated, as shown in Figure 1. If the following assumptions can be made: 1) steady operating conditions exist; 2) the air an ideal gas; 3) the local' atmospheric pressure is 1.00 atm: (a) Briefly and qualitatively analyze the four different locations for the radiators marked A), B), C) and D), as shown in Figure 1, and rank them in terms of heat transfer efficiency by natural convection. (b) Determine the rate of heat transfer from the radiator plate by natural convection if the plate is A) vertical and C) horizontal with the hot surface facing down. Compare the two and provide a brief discussion of the findings. wall A 0.4 mi C 0.4 m 0.4 m B floor ceiling 0.4 m wall Nu Nu=0.59Ra Nu-0.1 Raa 0.387Ral Nu- - {0.825 + 11 + (0.492/Pr)162) (complex but more accurate) Use vertical plate equations for the upper surface of a cold plate and the lower surface of a hot plate Replace g by g cose Nu-0.54Ra Nu-0.15Ra Nu = 0.27Ral for Ra < 10
Expert Answer:
Related Book For
Fundamentals of Thermal-Fluid Sciences
ISBN: 978-0078027680
5th edition
Authors: Yunus A. Cengel, Robert H. Turner, John M. Cimbala
Posted Date:
Students also viewed these mechanical engineering questions
-
Let A, B be sets. Define: (a) the Cartesian product (A B) (b) the set of relations R between A and B (c) the identity relation A on the set A [3 marks] Suppose S, T are relations between A and B, and...
-
Explain informally the difference between Godel's completeness theorem and his first incompleteness theorem. [8 marks] (b) State the meaning of Hoare triples {P} C {Q} in separation logic. [3 marks]...
-
Christina is trying to save money in her bank account. She decides that she can deposit $1000 each month into the account. The account earns 2.3% interest each month. How much money will be in the...
-
Explain as precisely as possible what Equation X 2 s/n (7.4) means, and the reason for the 2 in the formula?
-
In Problem, use the price - demand equation to find E(p), the elasticity of demand. x = f(p) = 160 - 35 In p
-
In the vapour absorption refrigeration system, the compression section is replaced by an assembly of (a) Absorber, heat exchanger and generator (b) Absorber, liquid pump, heat exchanger and generator...
-
The following information is available for Oscar Corporation for the year ended December 31, 2012. Beginning cash balance .................$ 45,000 Accounts payable decrease ................3,700...
-
Managerial Economics can be defined as amalgamation of economic theory with business practices so as to ease decision-making and future planning by management. Discuss how Managerial Economics...
-
Target Corporation prepares its financial statements according to U.S. GAAP. Targets financial statements and disclosure notes for the year ended February 3, 2018, are available in Connect. This...
-
To achieve total constructive interference, a. two individual waves must combine at their minimum intensities. b. it does not matter at which intensities they combine, as long as they combine. c. two...
-
Do you ever work with balance sheets in your current position?
-
True or false: A rational decision maker would always want to undertake a proposed project with a positive expected value.
-
Does your organization have a population health strategy?
-
Can managers take actions that affect events?
-
What are two forms of the formula to find the break-even quantity?
-
Graph the function f(t) t[h(t-1)- h(t- 3)] for t 2 0, where h(t) is Heaviside step function, find the Laplace transform of given function.
-
If 2 5 9 - k 5 8 = 2 5 8 , what is the value of k?
-
Design a scalding unit for slaughtered chickens to loosen their feathers before they are routed to feather-picking machines with a capacity of 1200 chickens per hour under the following conditions:...
-
A 25-W power transistor is to be cooled by attaching it to one of the commercially available heat sinks shown in Table 176. Select a heat sink that will allow the case temperature of the transistor...
-
Determine the view factors F 13 and F 23 between the rectangular surfaces shown in Fig. P2167. 3 m A2 m A1 m
-
Tesco plc is one of the worlds largest food retailers. Fiscal year 2014 (the year ended February 28, 2015) was a rocky year for the retailer. The companys sales and margins had come under pressure as...
-
Exhibit P2 displays a selected set of financial ratios for the years 20152017 of three fashion retailers: USbased Gap, UK-based Next, and Japan-based Uniqlo (Fast Retailing). Using this set of...
-
In 2009, following the worldwide credit crisis, several US-based car manufacturers, such as Chrysler and General Motors, approached bankruptcy and needed to be bailed out by the US government and...
Study smarter with the SolutionInn App