(2.1 for reference, solving 2.2)
PROBLEM 2.2. Considering the wire of Problem 2.1, perform the following parametıri analysis: determine the surface temperature of the wire when the electrical current ranges from 10 A to 100 A plot the temperature as a function of the current, a) b)
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PROBLEM 2.1. Determine the steady-state temperature of the surface of the wire of 0.25 in. diamet...
PROBLEM 2.1. Determine the steady-state temperature of the surface of the wire of 0.25 in. diameter...
PROBLEM 2.1. Determine the steady-state temperature of the surface of the wire of 0.25 in. diameter and 2, 1 ft long, carrying a current of 50 A. The convective heat transfer coefficient is 4.0 BTUhr-ft-oF, temperature of the air surrounding the wire is 32°F, the electrical resistivity of the material of the wire is 1.5 μΩ-ft and its thermal conductivity is 11 BTU/hr-ft-up,
2-157 A long electrical resistance wire of radius r.-0.25 cm has a thermal conductivity kwire-15 W/m-K. Heat is gene...
2-157 A long electrical resistance wire of radius r.-0.25 cm has a thermal conductivity kwire-15 W/m-K. Heat is generated uniformly in the wire as a result of resistance heating at a constant rate of 0.5 W/cm3. The wire is covered with polyethylene insulation with a thickness of 0.25 cm and thermal conductivity of ks 0.4 W/m K. The outer surface of the insulation is subjected to free convection in air at 20°C and a convection heat transfer coefficient of 2...
Two metal plates are being joined through the use of a weld rod. The electric current,...
Two metal plates are being joined through the use of a weld rod. The electric current, L, through the weld rod, causes thermal energy generation along the length of the weld rod. At the same tin the weld rod due to the hotness of the weld zone and convected into the surrounding ambient across the eylindrical surface of the rod. Formulate a differential equation which governs the temperature profile in the weld rod. Assume steady state. You do not need...
Problem 1. (75') This is a 1-D steady state problem. Only object A generates heat per unit volume of dA 2 x 106W/m3. The left surface of A is insulated and the right surface of B is exposed to a...
Problem 1. (75') This is a 1-D steady state problem. Only object A generates heat per unit volume of dA 2 x 106W/m3. The left surface of A is insulated and the right surface of B is exposed to a fluid. Temperature of the fluid is To 300 K. The convective heat transfer coefficient is h 1000 W/m2/K Thermal conductivity of A is kA 30 W/m/K, and B is k 20 W/m/K Thickness of each object is: IA-30 mm, 1':...
A 2.2-mm-diameter and 10-m-long electric wire is tightly wrapped with a 1-mm-thick plastic cover whose thermal...
A 2.2-mm-diameter and 10-m-long electric wire is tightly wrapped with a 1-mm-thick plastic cover whose thermal conductivity is k0.15 W/m-K. Electrical measurements indicate that a current of 13 A passes through the wire and there is a voltage drop of 8 V along the wire. If the insulated wire is exposed to a medium at T 30°C with a heat transfer coefficient of h 24 W/m2 K, determine the temperature at the interface of the wire and the plastic cover...
Two large parallel plates with surface conditions approximating those of a blackbody are maintained at 800°C...
Two large parallel plates with surface conditions approximating those of a blackbody are maintained at 800°C and 100°C, respectively. Determine the rate of heal transfer by radiation between the plates in Wim and the radiative heat transfer coefficient in W/m K ) 12 Write down the one-dimensional sent heal conduction equation for a plane wall with constant thermal conductivity and heat generation in its simplest form, and indicate what each variable represents 13 Write down the one-dimensional transient heat conduction...
Problem#01: prescribed surface temperatures. Consider two-dimensional, steady-state condition in a square cross section with a) Determine...
Problem#01: prescribed surface temperatures. Consider two-dimensional, steady-state condition in a square cross section with a) Determine the temperature at nodes 1, 2, 3, and 4 b) Estimate the midpoint temperaturebwen 1,2,3 d dyz1D cm-po.lm100 a)do it in Four steps teach Tem. 50"C 123, 1
Be used if its thickness were to be limited to 5 mm. iation material that should d is Problem 2.3...
how to solve it? number 2.36
t
be used if its thickness were to be limited to 5 mm. iation material that should d is Problem 2.35 2.36 The development of contact lenses has transformed the solutions that are available today for vision im- pairments. However, wearing them also poses several problems that includes the condition of dry eyes due to lack of cooling, oxygenation, and moisturizing or lubrication of the cornea, among others In the devel- opmental phase of...
IF YOU CANNOT SOLVE THEM ALL THEN PLEASE DONT SOLVE ANY. A hollow aluminum sphere, with...
IF YOU CANNOT SOLVE THEM ALL THEN PLEASE DONT SOLVE ANY.
A hollow aluminum sphere, with an electrical heater in the center, is used in tests to determine the thermal conductivity of insulating materials. The inner and outer radii of the sphere are 0.15 and 0.18 m, respectively, and testing is done under steady-state conditions with the inner surface of the aluminum maintained at 250°C. In a particular test, a spherical shell of insulation is cast on the outer surface...
Please show claer solve for ( a,c,d,e ) of this qustion. mm, electrical resistance per unit...
Please show claer solve for ( a,c,d,e ) of this qustion.
mm, electrical resistance per unit length An electrical transmission line (diameter: D=5 r=0.002 Ω/m) carries an electric current (1-100 A), dissipating an electrical power per unit length inr. On a windy day, the line is subjected to air flow (air temperature: T. -10C, air velocity V 50 km/hr) T, 10°C V 50 km/hr T, =? 1 -100 A air elec electrical line We would like to determine the surface...
PROBLEM 2.1. Determine the steady-state temperature of the surface of the wire of 0.25 in. diameter and 2, 1 ft long, carrying a current of 50 A. The convective heat transfer coefficient is 4.0 BTUhr-ft-oF, temperature of the air surrounding the wire is 32°F, the electrical resistivity of the material of the wire is 1.5 μΩ-ft and its thermal conductivity is 11 BTU/hr-ft-up,
2-157 A long electrical resistance wire of radius r.-0.25 cm has a thermal conductivity kwire-15 W/m-K. Heat is generated uniformly in the wire as a result of resistance heating at a constant rate of 0.5 W/cm3. The wire is covered with polyethylene insulation with a thickness of 0.25 cm and thermal conductivity of ks 0.4 W/m K. The outer surface of the insulation is subjected to free convection in air at 20°C and a convection heat transfer coefficient of 2...
Two metal plates are being joined through the use of a weld rod. The electric current, L, through the weld rod, causes thermal energy generation along the length of the weld rod. At the same tin the weld rod due to the hotness of the weld zone and convected into the surrounding ambient across the eylindrical surface of the rod. Formulate a differential equation which governs the temperature profile in the weld rod. Assume steady state. You do not need...
Problem 1. (75') This is a 1-D steady state problem. Only object A generates heat per unit volume of dA 2 x 106W/m3. The left surface of A is insulated and the right surface of B is exposed to a fluid. Temperature of the fluid is To 300 K. The convective heat transfer coefficient is h 1000 W/m2/K Thermal conductivity of A is kA 30 W/m/K, and B is k 20 W/m/K Thickness of each object is: IA-30 mm, 1':...
A 2.2-mm-diameter and 10-m-long electric wire is tightly wrapped with a 1-mm-thick plastic cover whose thermal conductivity is k0.15 W/m-K. Electrical measurements indicate that a current of 13 A passes through the wire and there is a voltage drop of 8 V along the wire. If the insulated wire is exposed to a medium at T 30°C with a heat transfer coefficient of h 24 W/m2 K, determine the temperature at the interface of the wire and the plastic cover...
Two large parallel plates with surface conditions approximating those of a blackbody are maintained at 800°C and 100°C, respectively. Determine the rate of heal transfer by radiation between the plates in Wim and the radiative heat transfer coefficient in W/m K ) 12 Write down the one-dimensional sent heal conduction equation for a plane wall with constant thermal conductivity and heat generation in its simplest form, and indicate what each variable represents 13 Write down the one-dimensional transient heat conduction...
Problem#01: prescribed surface temperatures. Consider two-dimensional, steady-state condition in a square cross section with a) Determine the temperature at nodes 1, 2, 3, and 4 b) Estimate the midpoint temperaturebwen 1,2,3 d dyz1D cm-po.lm100 a)do it in Four steps teach Tem. 50"C 123, 1
how to solve it? number 2.36
t
be used if its thickness were to be limited to 5 mm. iation material that should d is Problem 2.35 2.36 The development of contact lenses has transformed the solutions that are available today for vision im- pairments. However, wearing them also poses several problems that includes the condition of dry eyes due to lack of cooling, oxygenation, and moisturizing or lubrication of the cornea, among others In the devel- opmental phase of...
IF YOU CANNOT SOLVE THEM ALL THEN PLEASE DONT SOLVE ANY.
A hollow aluminum sphere, with an electrical heater in the center, is used in tests to determine the thermal conductivity of insulating materials. The inner and outer radii of the sphere are 0.15 and 0.18 m, respectively, and testing is done under steady-state conditions with the inner surface of the aluminum maintained at 250°C. In a particular test, a spherical shell of insulation is cast on the outer surface...
Please show claer solve for ( a,c,d,e ) of this qustion.
mm, electrical resistance per unit length An electrical transmission line (diameter: D=5 r=0.002 Ω/m) carries an electric current (1-100 A), dissipating an electrical power per unit length inr. On a windy day, the line is subjected to air flow (air temperature: T. -10C, air velocity V 50 km/hr) T, 10°C V 50 km/hr T, =? 1 -100 A air elec electrical line We would like to determine the surface...
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