2-) Methane gas enters an uninsulated horizontal pipe with a thin wall of 25 cm in...

2-) Methane gas enters an uninsulated horizontal pipe with a thin wall of 25 cm in diameter at a temperature of (300+ ??) C with 4.5 tons of mass flow per hour and exits at (280+ ??) C. The pipe is smooth and its length is 10 m and the ambient and environmental temperature is 25 C. Since the smear coefficient of the pipe surface is given as 0.8; (?? = school no. last two digits, for example 0611002072; ?? = 72, ie 300 + 72 = 372 C and 280 + 72 = 352 C) a-) Indoor and outdoor convection coefficients (W / m K), b -) Calculate heat loss from the pipe to the environment (W), c-) Surface temperature of the pipe (C), d-) Calculate the required fan power (W) and interpret the results.

28 will be written instead of a question mark

Expert Solution

If you like my efforts, give thumps up.

samet mamat answered 17 hours ago

Methane gas enters a horizontal pipe with a thin wall of 25 cm diameter at a...

Methane gas enters a horizontal pipe with a thin wall of 25 cm diameter at a temperature of 309 C with 4.5 tons of mass flow per hour and exits at 289 C. The pipe is smooth and its length is 10 m and the ambient and environmental temperature is 25 C. Since the smear coefficient of the pipe surface is given as 0.8; a-) Indoor and outdoor convection coefficients (W / m2K), b-) Heat loss from the pipe to...

An uninsulated steam pipe with a wall temperature of 140 °C passes through a room of...

An uninsulated steam pipe with a wall temperature of 140 °C passes through a room of quiescent air of 14 °C. The pipe is horizontal and has an outer diameter of 20 cm. Find the following (include units if needed): a) The temperature to evaluate properties = __________ b) The Rayleigh number, _____________ c) The heat transfer coefficient, h = ____________ d) q’ along the pipe = ________________ e) The pipe diameter is decreased by 50%. If all other parameters...

Steam enters a horizontal 15-cm-diameter pipe as a saturated vapor at 5 bar with a velocity...

Steam enters a horizontal 15-cm-diameter pipe as a saturated vapor at 5 bar with a velocity of 10 m/s and exits at 4.5 bar with a quality of 95%. Heat transfer from the pipe to the surroundings at 300K takes place at an average outer surface temperature of 400 K. For operation at steady state, determine (a) the velocity at the exit, in m/s. (b) the rate of heat transfer from the pipe, in kW. (c) the rate of entropy...

methane gas CH4 enters a steady flow combustion chamber at 25 oC and 1 atm and...

methane gas CH4 enters a steady flow combustion chamber at 25 oC and 1 atm and is burned with 40 percent excess air, which also enters at 25 oC and 1 atm. After combustion, the products are allowed to cool to 25 oC. Assume complete combustion, determine the heat transfer per kmol of CH4

A horizontal uninsulated steam pipe passes through a large room whose walls and ambient air are...

A horizontal uninsulated steam pipe passes through a large room whose walls and ambient air are at 300 K. The pipe of 125-mm diameter has an emissivity of 0.85 and an outer surface temperature of 373 K. Calculate the rate of heat loss per unit length from the pipe. Answer should be close to 384W/m Please show all work neatly

A 8.0-cm-diameter horizontal pipe gradually narrows to 5.0 cm . When water flows through this pipe...

A 8.0-cm-diameter horizontal pipe gradually narrows to 5.0 cm . When water flows through this pipe at a certain rate, the gauge pressure in these two sections is 31.0 kPa and 25.0 kPa , respectively. What is the volume rate of flow?

A horizontal pipe 10 cm in diameter and 3000 cm long is filled with a sand...

A horizontal pipe 10 cm in diameter and 3000 cm long is filled with a sand of 20 % porosity. The permeability of the sand is estimated to be 250 md. The sand is saturated with an oil of viscosity 0.65 cp, and the same oil is injected into the sand pipe. You are asked to calculate a. What is the Darcy velocity in the sand pipe under a 100-psi pressure differential? b. What is the flow rate through the...

9.77 Methane is burned with 25% excess air in a continuous adiabatic reactor. The methane enters...

9.77 Methane is burned with 25% excess air in a continuous adiabatic reactor. The methane enters the reactor at 25 C and 1.10 atm at a rate of 550 L/s, and the entering air is at 150 C and 1.1 atm. Combustion in the reactor is complete, and the reactor effluent gas emerges at 1.05 atm. a) Calculate the temperature and the degrees of superheat of the reactor effluent. (Consider water to be the only condensable species in the effluent)....

a- Water enters a house through a pipe with inside diameter of 3.0 cm at an...

a- Water enters a house through a pipe with inside diameter of 3.0 cm at an absolute pressure of 5.0 X 105 Pa. A 1.5 cm diameter pipe leads to the second-floor bathroom 6.0 m above. When the flow speed at the inlet pipe is 2.0 m/s find: - Flow speed (velocity) of the water in the bathroom - Pressure water in the bathroom? - Calculate the volume flow rate in the bathroom.

A 20 cm long horizontal spring (k= 200 N/m) is attached to a wall. A 2...

A 20 cm long horizontal spring (k= 200 N/m) is attached to a wall. A 2 kg box is attached to the other end. You pull the box 3 cm, displacing the spring from equilibrium. Assume the floor is frictionless. If the box is released from rest at t = 0 s: Write an equation describing the position of the box at some arbitrary time “t”. Go ahead and fill in the values for amplitude, phase angle, and angular frequency....

Question