Hi, please help me with this problem, please explain me step by step and write with very good cal...
Hi, please help me with this problem, please explain me step by step and write with very good calligraphy.
Solve the next problems:
* Water is heated in a horizontal tube. Water enters at a rate of 6 lbm / s and 60 ° F and is heated to 300 ° F. The water flows through an aluminum tube of 3 in diameter. The pipe is heated by an electric resistance ratio of 405Btu / h per foot of pipe length. Determine the minimum length required to heat the water and the surface temperature of the pipe to the outlet.
* Enter hot water at 85 ° C to a steel tube (k = 48 W / m.K) of 17 m long internal and external diameter of 3 and 3.8 cm, respectively, at an average speed of 0.9 m / s. The outer surface of the tube, whose emissivity is 0.5, is exposed to air at 15 ° C with a convection heat transfer coefficient of 25 W / m2K. Determine a) the reason for the heat loss from the water and b) the water outlet temperature.
Thank you so much.
Homework Answers
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Hi, please help me with this problem, please explain me step by step and write with very good cal...
Water at 320 K and a flow rate of 5 kg/s enters a black, thin-walled tube,...
Water at 320 K and a flow rate of 5 kg/s enters a black, thin-walled tube, which passes through a large furnace whose walls and air are at a temperature of 700 K. The diameter and length of the tube are 0.25 m and 8 m, respectively. Convection coefficients associated with water flow through the tube and airflow over the tube are 300 W/m2K and 50 W/m2.K, respectively. Tube, D-0.25 m L-8 me-1 Air 7-700 K Water -5 kas -Fumace,...
Please help me with this problem 2. A composite cylinder is formed by a long cylindrical...
Please help me with this problem
2. A composite cylinder is formed by a long cylindrical rod (A) and two concentric cylinders (tubes B and C). Tube B encloses trod A and its inner and outer radii are 20 mm and 40 mm, respectively. Tube C encloses tube B and its outer radius is 50 mm. A thin electrical heater is inserted between rod A and tube B. The rod (A) has a thermal conductivity of 2.5 w/m K, while...
please help me ASAP 2. [10] COI A steel tube (ks - 43.26 W/mK) of 5.08...
please help me ASAP
2. [10] COI A steel tube (ks - 43.26 W/mK) of 5.08 cm inner diameter and 7.62 em outer diameter is covered with 2.5 cm layer of insulation (k, -0.208 W/mK) the inside surface of the tube receivers heat from a hot gas at the temperature of 316°C with heat transfer co-efficient of 28 W/mK. While the outer surface exposed to the ambient air at 30°C with heat transfer co- efficient of 17 W/mK. Calculate heat...
A water heater consists of a copper tube that carries water through hot gas in a...
A water heater consists of a copper tube that carries water through hot gas in a furnace, as shown in Fig. 1. hot gas at T, = 500° th=0.033 inch h, = 25 W/m2K Poytube = 0.25 inch water at Tv = 30° h = 500 W/m2K kube= 300 W/m-K Figure 1: Copper tube in a water heater. The copper tube has an outer radius, ro,tube = 0.25 inch and a tube wall thickness of th=0.033 inch. The conductivity of...
Water at 340 K and a flow rate of 5 kg/s enters a black, thin‐walled tube,...
Water at 340 K and a flow rate of 5 kg/s enters a black,
thin‐walled tube, which passes through a large furnace whose walls
and air are at a temperature of 700 K. The diameter and length of
the tube are 0.25 m and 8 m, respectively. Convection coefficients
associated with water flow through the tube and airflow over the
tube are 300 W/m2·K and 50 W/m2·K, respectively.
Write an expression for the
linearized radiation coefficient corresponding to radiation
exchange...
Hi，gays l want know the answer of problem 5.3，l just want check my answer. Problem 52...
Hi，gays l want know the answer of problem 5.3，l just want check my
answer.
Problem 52 Water flows at 0.5 m st through a 9 mm diameter tube where it is heated by electrical resistance with a constant heat fluux of 75 kW m2. If the water enters the tube at 15 °C, and the tube 3 m long, calculate the total rate of heat transfer from the tube to the water, and the outlet temperature. Problem 53 Water flows...
Water at m = 0.025 kg/s and Zn,i = 20°C enters an annular region formed by an inner tube of diame...
Water at m = 0.025 kg/s and Zn,i = 20°C enters an annular region formed by an inner tube of diameter D, = 20 mm and an outer tube of diameter Do-80 mm. Saturated steam flows through the inner tube, maintaining its surface at uniform temperature of T,i 100°C, while the outer surface of the outer tube is well insulated. If fully developed conditions may be assumed throughout the annulus, how long must the system be to provide an outlet...
Hi, please help me with this problem, please explain me step by step and write with...
Hi, please help me with this problem, please explain me step by
step and write with very good calligraphy. Thank you very much.
Consider casting sand mold of the piece shown in the figure. The
dimensions are in centimeters.
(i) The molten metal overflows the pouring cup of the mold and
flows down the sprue (downsprue) at a constant rate of 2000
cm3/s. The cross section of the sprue is circular, with
a diameter of 6 cm at the top....
please show me the whole work for question 4) and 5),thank you so much An insulating...
please show me the whole work for question 4) and 5),thank you
so much
An insulating wall is composed of 10 cm of a material having an thermal conductivity of 5 W/m.K, and an unknown thickness of cork, which has a thermal conductivity of 0.045 W/m.K. How thick must the cork be if the heat losses through the wall are to be less than 10W/m2 when the inside temperature is 20degree C and it's -20degree C outside? Water flows through...
please show work 5/10 5 View Policies Show Attempt History An experiment is designed to study...
please show work
5/10 5 View Policies Show Attempt History An experiment is designed to study microscale forced convection. Water at Tm. i - 300 K is to be heated in a straight, circular glass tube with a 60-um inner diameter and a wall thickness of 3 mm. Warm water at Too - 350 K, V - 2 m/s is in cross flow over the exterior tube surface. The experiment is to be designed to cover the operating range 15...
Water at 320 K and a flow rate of 5 kg/s enters a black, thin-walled tube, which passes through a large furnace whose walls and air are at a temperature of 700 K. The diameter and length of the tube are 0.25 m and 8 m, respectively. Convection coefficients associated with water flow through the tube and airflow over the tube are 300 W/m2K and 50 W/m2.K, respectively. Tube, D-0.25 m L-8 me-1 Air 7-700 K Water -5 kas -Fumace,...
Please help me with this problem
2. A composite cylinder is formed by a long cylindrical rod (A) and two concentric cylinders (tubes B and C). Tube B encloses trod A and its inner and outer radii are 20 mm and 40 mm, respectively. Tube C encloses tube B and its outer radius is 50 mm. A thin electrical heater is inserted between rod A and tube B. The rod (A) has a thermal conductivity of 2.5 w/m K, while...
please help me ASAP
2. [10] COI A steel tube (ks - 43.26 W/mK) of 5.08 cm inner diameter and 7.62 em outer diameter is covered with 2.5 cm layer of insulation (k, -0.208 W/mK) the inside surface of the tube receivers heat from a hot gas at the temperature of 316°C with heat transfer co-efficient of 28 W/mK. While the outer surface exposed to the ambient air at 30°C with heat transfer co- efficient of 17 W/mK. Calculate heat...
A water heater consists of a copper tube that carries water through hot gas in a furnace, as shown in Fig. 1. hot gas at T, = 500° th=0.033 inch h, = 25 W/m2K Poytube = 0.25 inch water at Tv = 30° h = 500 W/m2K kube= 300 W/m-K Figure 1: Copper tube in a water heater. The copper tube has an outer radius, ro,tube = 0.25 inch and a tube wall thickness of th=0.033 inch. The conductivity of...
Water at 340 K and a flow rate of 5 kg/s enters a black,
thin‐walled tube, which passes through a large furnace whose walls
and air are at a temperature of 700 K. The diameter and length of
the tube are 0.25 m and 8 m, respectively. Convection coefficients
associated with water flow through the tube and airflow over the
tube are 300 W/m2·K and 50 W/m2·K, respectively.
Write an expression for the
linearized radiation coefficient corresponding to radiation
exchange...
Hi，gays l want know the answer of problem 5.3，l just want check my
answer.
Problem 52 Water flows at 0.5 m st through a 9 mm diameter tube where it is heated by electrical resistance with a constant heat fluux of 75 kW m2. If the water enters the tube at 15 °C, and the tube 3 m long, calculate the total rate of heat transfer from the tube to the water, and the outlet temperature. Problem 53 Water flows...
Water at m = 0.025 kg/s and Zn,i = 20°C enters an annular region formed by an inner tube of diameter D, = 20 mm and an outer tube of diameter Do-80 mm. Saturated steam flows through the inner tube, maintaining its surface at uniform temperature of T,i 100°C, while the outer surface of the outer tube is well insulated. If fully developed conditions may be assumed throughout the annulus, how long must the system be to provide an outlet...
Hi, please help me with this problem, please explain me step by
step and write with very good calligraphy. Thank you very much.
Consider casting sand mold of the piece shown in the figure. The
dimensions are in centimeters.
(i) The molten metal overflows the pouring cup of the mold and
flows down the sprue (downsprue) at a constant rate of 2000
cm3/s. The cross section of the sprue is circular, with
a diameter of 6 cm at the top....
please show me the whole work for question 4) and 5),thank you
so much
An insulating wall is composed of 10 cm of a material having an thermal conductivity of 5 W/m.K, and an unknown thickness of cork, which has a thermal conductivity of 0.045 W/m.K. How thick must the cork be if the heat losses through the wall are to be less than 10W/m2 when the inside temperature is 20degree C and it's -20degree C outside? Water flows through...
please show work
5/10 5 View Policies Show Attempt History An experiment is designed to study microscale forced convection. Water at Tm. i - 300 K is to be heated in a straight, circular glass tube with a 60-um inner diameter and a wall thickness of 3 mm. Warm water at Too - 350 K, V - 2 m/s is in cross flow over the exterior tube surface. The experiment is to be designed to cover the operating range 15...
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