Homework Answers
Add Answer to:
Advanced thermofulid machanics
3. Heat is generated at zoW in a horizontal plate that is 16cm-ionga...
1. Consider an opaque, horizontal square plate (Im by 1m) with an electrical heater on its backside. The front side is exposed to ambient quiescent air that is at 20° C, solar irradiation (from...
1. Consider an opaque, horizontal square plate (Im by 1m) with an electrical heater on its backside. The front side is exposed to ambient quiescent air that is at 20° C, solar irradiation (from sun at 5800° K) of 600 W/m2, and an effective sky temperature of -40° C. The plate surface temperature is kept at Ts 60 C (at steady state condition). Calculate natural convection heat transfer coefficient from the plate. (10 points) What is the electrical power (W/m2)...
An aluminum plate with a thickness of L=5 mm is mounted in a horizontal position, and...
An aluminum plate with a thickness of L=5 mm is mounted in a horizontal position, and its bottom surface is well insulated. A special, thin coating (with emissivity and solar absorptivity of 0.25) is applied to the top surface. The density ρ and specific heat c of aluminum are known to be 2700 kg/m3 and 900 J/kg · K, respectively. Consider conditions for which the plate is initially at a temperature of ??????=25 °C and its top surface is suddenly...
The electrical work of 550 W is needed to heat up the plate of a dish...
The electrical work of 550 W is needed to heat up the plate of a dish heater. The heater is exposed to the air at 20°C. The convection heat transfer coefficient between the plate surface and the surrounding air is 35 W/m2.°C. If the dish heater plate with a surface area of 0.01 m2, is at 677°C, determine the emissivity of the plate of the dish heater?
Heat transfer stream velocity is 34 m/s. the plate is the end of the plate: the...
Heat transfer
stream velocity is 34 m/s. the plate is the end of the plate: the surface of Air lr 120 C is fowing over the top surface of a 5.3-m long: 2.5-m width fnat plate. The air ity is 34 m/s, the plate is subjected to constant heat flux of 153 W/mi. Determine st ae (a)the friction coefficient, (b) the convection heat transfer coefficient, and (c) temperature. Also evaluate the surface temperature at x- 0.5 m of the plate?...
table A-13 heat transfer book Consider a thin plate of 20 cm by 20 cm is...
table A-13 heat transfer book
Consider a thin plate of 20 cm by 20 cm is standing vertically in air. One side of the plate is insulated. The plate surface temperature is 50°C. The room air temperature where the plate is located is 20'C. Determine: (a) Is the flow laminar or turbulent? (b) What Nu number correlation will you use to find h? Find Nu. (C) Find the convection heat transfer coefficient (h) (d) Find the rate of convection heat...
The heat that is conducted through a body must frequently be removed by other heat transfer...
The heat that is conducted through a body must frequently be removed by other heat transfer processes. For example, the heat generated in an electronic device must be dissipated to the surroundings through convection by means of fins. Consider the one-dimensional aluminum fin (thickness t 3.0 mm, width 20 cm, length L) shown in Figure 1, that is exposed to a surrounding fluid at a temperature T. The conductivity of the aluminum fin (k) and coefficient of heat convection of...
7. Consider a thin plate of 20 cm by 20 cm is standing vertically in air....
7. Consider a thin plate of 20 cm by 20 cm is standing vertically in air. One side of the plate is insulated. The plate surface temperature is 50°C. The room air temperature where the plate is located is 20°C. Determine: (a) Is the flow laminar or turbulent? (b) What Nu number correlation will you use to find h? Find Nu. (c) Find the convection heat transfer coefficient (h) (d) Find the rate of convection heat transfer from the plate.
The lower surface of a horizontal aluminum plate 5 in. by 7 in. is heated by...
The lower surface of a horizontal aluminum plate 5 in. by 7 in. is heated by an electric resistance heater that supplies 10 W. The upper surface is cooled by free convection and radiation. The convective transfer coefficient is 1.2 Btu/hr ft2 °F and the air temperature is 70 °F. Surrounding room surfaces are also at 70 °F. Find the surface temperature of the aluminum if it is a) clean and shiny with ε=0.05 b) painted with ε=0.9
izon- e and sur- osed loss calm ffec- e the ce to 1-106 A nonmetal plate...
izon- e and sur- osed loss calm ffec- e the ce to 1-106 A nonmetal plate (k = 0.05 W/m.K) and an ASME SA-240 stainless steel plate (k = 15 W/m-K) are bolted together by ASTM B21 naval brass bolts. Both plates have a thickness of 38 mm, and the brass bolts are bolted through both plates. The bottom steel plate surface (surface 1) is subjected to a uniform heat flux of 200 W/m². The top non- metal plate surface...
6.10.8 Heat Loss from Elephant Pinna The African elephant has developed the pinna or external ear...
6.10.8 Heat Loss from Elephant Pinna The African elephant has developed the pinna or external ear that functions as a radiator convector (see page 60 for more discussion). The pinna can be modeled as a flat plate with air flow over it. 1) Find and plot the convective heat loss from the pinna as the surface temperature of the pinna ranges from 21°C to 36°C. 2) If the rate of metabolic heat production for a 2000 kg elephant is 1650...
1. Consider an opaque, horizontal square plate (Im by 1m) with an electrical heater on its backside. The front side is exposed to ambient quiescent air that is at 20° C, solar irradiation (from sun at 5800° K) of 600 W/m2, and an effective sky temperature of -40° C. The plate surface temperature is kept at Ts 60 C (at steady state condition). Calculate natural convection heat transfer coefficient from the plate. (10 points) What is the electrical power (W/m2)...
Heat transfer
stream velocity is 34 m/s. the plate is the end of the plate: the surface of Air lr 120 C is fowing over the top surface of a 5.3-m long: 2.5-m width fnat plate. The air ity is 34 m/s, the plate is subjected to constant heat flux of 153 W/mi. Determine st ae (a)the friction coefficient, (b) the convection heat transfer coefficient, and (c) temperature. Also evaluate the surface temperature at x- 0.5 m of the plate?...
table A-13 heat transfer book
Consider a thin plate of 20 cm by 20 cm is standing vertically in air. One side of the plate is insulated. The plate surface temperature is 50°C. The room air temperature where the plate is located is 20'C. Determine: (a) Is the flow laminar or turbulent? (b) What Nu number correlation will you use to find h? Find Nu. (C) Find the convection heat transfer coefficient (h) (d) Find the rate of convection heat...
The heat that is conducted through a body must frequently be removed by other heat transfer processes. For example, the heat generated in an electronic device must be dissipated to the surroundings through convection by means of fins. Consider the one-dimensional aluminum fin (thickness t 3.0 mm, width 20 cm, length L) shown in Figure 1, that is exposed to a surrounding fluid at a temperature T. The conductivity of the aluminum fin (k) and coefficient of heat convection of...
7. Consider a thin plate of 20 cm by 20 cm is standing vertically in air. One side of the plate is insulated. The plate surface temperature is 50°C. The room air temperature where the plate is located is 20°C. Determine: (a) Is the flow laminar or turbulent? (b) What Nu number correlation will you use to find h? Find Nu. (c) Find the convection heat transfer coefficient (h) (d) Find the rate of convection heat transfer from the plate.
izon- e and sur- osed loss calm ffec- e the ce to 1-106 A nonmetal plate (k = 0.05 W/m.K) and an ASME SA-240 stainless steel plate (k = 15 W/m-K) are bolted together by ASTM B21 naval brass bolts. Both plates have a thickness of 38 mm, and the brass bolts are bolted through both plates. The bottom steel plate surface (surface 1) is subjected to a uniform heat flux of 200 W/m². The top non- metal plate surface...
6.10.8 Heat Loss from Elephant Pinna The African elephant has developed the pinna or external ear that functions as a radiator convector (see page 60 for more discussion). The pinna can be modeled as a flat plate with air flow over it. 1) Find and plot the convective heat loss from the pinna as the surface temperature of the pinna ranges from 21°C to 36°C. 2) If the rate of metabolic heat production for a 2000 kg elephant is 1650...
Most questions answered within 3 hours.
-
Calculate and plot the number and weight distributions of x-mers
found in a step-growth polymerization for...
asked 2 minutes ago -
The Baily Corporation has developed a specialized software
program that improves inventory control capability. The following...
asked 6 minutes ago -
Problem 5-4A (Part Level Submission) Wolford Department Store is
located in midtown Metropolis. During the past...
asked 6 minutes ago -
Preparation of Benzoic Acid using a Grignard Reagent URGENT
1. During your Grignard formation, a small...
asked 29 minutes ago -
A uniform magnetic field is perpendicular to the plane of a wire
loop. If the loop...
asked 28 minutes ago -
At the peak of your career, your were earning $120,000 and
holding a top level position....
asked 31 minutes ago -
. A permanent magnet is dropped south-end-down through a horizontal
circular coil with a radius of...
asked 33 minutes ago -
Bernie's Beverages purchased some fixed assets classified as
5-year property for MACRS. The assets cost $28,000....
asked 47 minutes ago -
How many ATPs are produced from the catabolism of a 10-C
molecule of fatty acid under...
asked 52 minutes ago -
Before practicing a routine on the rings, a 64.8 kg gymnast
hangs motionless, with one hand...
asked 54 minutes ago -
If the K b of a weak base is 6.3 × 10 − 6 , what...
asked 1 hour ago -
Which of the following is the minimum amount of moles of NaOH
that must be added...
asked 1 hour ago