(35 points) A horizontal solid plate has simultaneous conduction, convection, and radiation modes of heat transfer....
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
(35 points) A horizontal solid plate has simultaneous conduction, convection, and radiation modes of heat transfer. On the top side of the plate, air is flowing at Too,air = 260C with htop = 40 W/mK. Additionally, the top of the plate is irradiated with G = 1450 W/m, and 435 W/m is reflected from the top surface. On the bottom of the plate, water flows adjacent to the bottom surface of the plate and is at a bulk temperature of T,w = 22C. The plate has thickness L = 21 mm and thermal conductivity k = 25 W/mK. At steady-state, the top and bottom of the plate have constant surface temperatures T = 43C and T = 35C, respectively. The plate is an opaque medium and a diffuse emitter. Evaluate the system at steady state. Heat generation is negligible in the plate. Assume 1-D conduction along the thickness of the plate. Air x Too,air htop Tt L Th Water Too,W hbottom (a) Determine the transmissivity, reflectivity, and absorptivity of the plate. (b) Write the surface energy balance expression for the top surface of the plate. Hint: We must account for conduction in the plate. There are radiation, convection, and conduction components. (c) Using the energy balance in (b), determine the emissivity of the plate. (d) What is the radiosity J associated with the top of the plate? (e) Write the surface energy balance expression for the bottom surface of the plate. (f) Using the energy balance in (e), determine the convection heat transfer coefficient hbottom associated with the water flow at the bottom of the plate? (35 points) A horizontal solid plate has simultaneous conduction, convection, and radiation modes of heat transfer. On the top side of the plate, air is flowing at Too,air = 260C with htop = 40 W/mK. Additionally, the top of the plate is irradiated with G = 1450 W/m, and 435 W/m is reflected from the top surface. On the bottom of the plate, water flows adjacent to the bottom surface of the plate and is at a bulk temperature of T,w = 22C. The plate has thickness L = 21 mm and thermal conductivity k = 25 W/mK. At steady-state, the top and bottom of the plate have constant surface temperatures T = 43C and T = 35C, respectively. The plate is an opaque medium and a diffuse emitter. Evaluate the system at steady state. Heat generation is negligible in the plate. Assume 1-D conduction along the thickness of the plate. Air x Too,air htop Tt L Th Water Too,W hbottom (a) Determine the transmissivity, reflectivity, and absorptivity of the plate. (b) Write the surface energy balance expression for the top surface of the plate. Hint: We must account for conduction in the plate. There are radiation, convection, and conduction components. (c) Using the energy balance in (b), determine the emissivity of the plate. (d) What is the radiosity J associated with the top of the plate? (e) Write the surface energy balance expression for the bottom surface of the plate. (f) Using the energy balance in (e), determine the convection heat transfer coefficient hbottom associated with the water flow at the bottom of the plate?
Expert Answer:
Related Book For
Posted Date:
Students also viewed these chemical engineering questions
-
An opaque, horizontal plate has a thickness of L = 21 mm and thermal conductivity k = 25 W/m K. Water flows adjacent to the bottom of the plate and is at a temperature of T,w = 25C. Air flows above...
-
(a) LEP Table 12-2: Exothermic Reaction with Heat Exchange Download the Polymath, MATLAB, Python, or Wolfram codes for the algorithm and data given in Table T12-2 for the exothermic gas phase...
-
Revvit is an online motorcycle equipment store that sells motorcycle helmets, boots, jackets, and more. With no brick-and-mortar stores, Revvit relies on many systems to provide an excellent customer...
-
How could IT, information and knowledge create value for this organization in the next 5 years
-
Phono Company manufactures a plastic toy cell phone. The following standards have beenestablished for the toy's materials and labor inputs: During the rst week of July, the company had the following...
-
What are the advantages and limitations of performance indicators to be used in a National Health Service hospital trust? Provide examples of areas where they can be used.
-
Chris and Stefani Watanabe live with their two boys at 1400 Victoria Lane, Riverside, CA 92501. Chris is an accountant who has his own accounting practice. Stefani is an elementary school teacher....
-
Liz has had a mortgage with Everyday Bank for the past 3 years. The original balance of the mortgage was $300,000.00 and her original monthly payment was $1,000.00. During the first year Liz made an...
-
The amount on the shares which is actually demanded by thecompany to be paid is known as: a. Paid-up Share Capital b. Subscribed Share Capital c. Called-up Share Capital d. Issued Share Capital
-
Simpson Peripherals earned $0.90 per share in 2010 and $1.52 in 2015. Calculate the annual growth rate in earnings per share over this period.
-
The Doley Company has planned the following sales for the next three months: Budgeted sales Jan $40,000 Feb $50,000 Mar $70,000 Sales are made 20% for cash and 80% on account. From experience, the...
-
4. Electroluxy appliance Company produces microwave. The following information relates to The Company in June 2024 : Required: Sales 8,000 units Per Unit Total Selling price per unit $100 $800,000...
-
Mitch Co. had the following Inventory purchases during May: May 5th - 20 units @ $10/each May 12th - 15 units @ $11/each May 20th - 5 units @ 9/each Mitch Co. uses Specific Identification to assign...
-
Assume current assets totaled $55,000 and the current ratio was 1.2 before the following independent transactions: 1. Purchased merchandise for $10,000 on short-term credit. 2. Purchased a delivery...
-
2 log e Evaluating the definite integral of dx from 1 to a certain integer k yields 2. Find the value of k. A. 4 . 6 C. 8 D. 10 O A D
-
The MIT Sloan School of Management is one of the leading business schools in the U.S. The following table contains the tuition data for the masters program in the Sloan School of Management. a. Use...
-
Walter White, Jesse Pinkman, and Mike Ehrmantraut stole 1000 gal of methylamine during an episode of the TV series Breaking Bad (See Season 4, Episode 10). Shortly thereafter, Jesse and Mike decided...
-
A new energy efficiency saving device, the Turbo Retro Thermo Encabulator has been previewed in the following YouTube video (https://www.youtube.com/watch v=RXJKdh1KZ0w). Write a two-sentence...
-
The elementary gas-phase reaction 2A C is carried out in a packed-bed reactor. Pure A enters the reactor at a 450-K flow rate of 10 mol/s, and a concentration of 0.25 mol/dm 3 . The PBR contains 90...
-
Use the code given earlier for R to make this plot. The command would be plot(percentage)
-
Why would you not feel comfortable computing a Pearson correlation on the data in Exercise 9.10? Exercise 9.10 Down syndrome is another problem that psychologists deal with. It has been proposed that...
-
In Exercise 9.1 the percentage of mothers over 40 does not appear to be important, and yet it is a risk factor in other societies. Why do you think that this might be? Exercise 9.1 In Sub-Saharan...
Study smarter with the SolutionInn App