Pressurized steam flows through a pipe of 0.6 m diameter. The pipe is embedded in a concrete block ,conductivity k = 1.4 W/mK ,with a square cross sectional length, w = 1 m . The required surface temperature values are 401 and 301 in K. Calculate the heat loss from the pipe per unit length. w Concrete T1 T2 D = 0.6 m
Q: A steel tube with 5 cm internal diameter, 7.6 cm outer diameter and k=15W/m °C is covered with an…
A:
Q: A central heating system from a house consists of 50m of 15mm outside diameter copper pipe with a…
A:
Q: A steam pipe 50 mm diameter and 2.5 m long has been placed horizontally and exposed to still air at…
A:
Q: A perfectly insulated aluminium bar (k = 297 W/m K) of diameter 20 cm and length 0.1 m connects a…
A: Thermal conductivity of aluminium bar, k=297 W/m.K Diameter of the bar, d=20 cm = 0.2 m Length of…
Q: A thick-walled tube of stainless steel [ K=19 W/ m-ºC]. with 2-cm inner diameter (ID) and 4-cm outer…
A:
Q: For a flat corrugated galvanized steel (conductivity = 26 W/m.K) roof 1/32 in. thick lined with a ¼…
A: Write the expression for thermal transmittance as follows.
Q: Q5: The piston cylinder device (radius =10 cm) contains a liquid with a pressure 100 kpa and…
A:
Q: 443. Heat Loss from a Buried Pipe A water pipe whose wall temperature is 300 K has a diameter of 150…
A: Given:
Q: A 2 cm thick steel pipe (thermal conductivity 43 W/[m °C]) with 6 cm inside diameter is being used…
A:
Q: Q5B) A steel pipe of 170 mm inner diameter and 190 mm outer diameter with thermal conductivity 55…
A:
Q: Steel pipe 1 cm thick, 1.0 m long and 8 cm deep, quiet with 4 cm thick insulation. The inner wall…
A: Given data: For steel pipe, outer diameter, do=8 cm ⇒Outer radius, ro=4 cm. Thickness of steel pipe…
Q: A domestic refrigerator with inner dimensions of 0.7 m by 0.7 m at the base and height 1 m was…
A: Base area = 0.7 m x 0.7 m Height = 1 m Ti = 6 C hi= 11.6 W/m2K ho = 14.5 W/m2K
Q: A thick walled tube of stainless steel (k = 19 W/m.C) with inner diameter 20 mm and 40 mm outer…
A:
Q: A thick-walled tube of stainless steel [18% Cr, 8% Ni, k=19 W/m.°C] with 2 cm inner diameter (ID)…
A: given;
Q: Steel pipe 3 cm thick, 1.0 m long and 10 cm deep, quiet with 6 cm thick insulation. The inner wall…
A:
Q: A hot steam pipe having an inside surface temperature of 250°C has an inside diameter of 8 cm and a…
A: GIVEN DATA- A COMPOSITE CYLINDER GIVEN COVERED WITH DIFFERENT INSULATION WE HAVE TO FIND HEAT…
Q: A central heating system from a house consists of 50m of 15mm outside diameter copper pipe with a…
A:
Q: A cast iron pipe is used to transfer steam with an inlet temperature of 350 C. Inner radius of the…
A:
Q: A steam pipe (inner diameter = 150 mm and outer diameter = 160 mm) having thermal conductivity 58…
A: Given, T1 = 320 °CT2 = 40 °CL = 1 mkpipe = 58 W/m °Ckins1 = 0.18 W/m °Ckins2 = 0.09 W/m °CInternal…
Q: fin made of AL metal with thermal conductivity (199 W / mK). Fin dimensions 3 cm long and 2.5 mm…
A: given data: fin metal : Al : k = 199 W/mK length; l = 0.03 m thickness; t = 2.5 mm wall temperature;…
Q: Q5: The piston cylinder device (radius =10 cm) contains a liquid with a pressure 100 kpa and…
A: Given, For liquid container,radius r=10cmPressure, P=100KPaTemperature, T2=20°cConvective heat…
Q: A domestic refrigerator with inner dimensions of 0.7 m by 0.7 m at the base and height 1 m was…
A:
Q: A domestic refrigerator with inner dimensions of 0.7 m by 0.7 m at the base and height 1 m was…
A: given: The area at base, a = 0.7 x 0.7 m2 the area of vertical surface of refrigerator, A = 0.7 x 1…
Q: Q5/ A hot steam pipe having an inside surface temperature of 250 C has an inside diameter of 8 cm…
A:
Q: Water flows at 50 C inside a 2.5-cm-inside-diameter tube such that h, =3500 W/m2 C. The tube has a…
A:
Q: A domestic refrigerator with inner dimensions of 0.7 m by 0.7 m at the base and height 1 m was…
A: inner dimensions = 0.7 m by 0.7 m at the base height = 1 m Ti = 6 ˚C. T two 10-mm-thick layers of…
Q: A cast iron pipe is used to transfer steam with an inlet temperature of 300 C. Inner radius of the…
A:
Q: A central heating system from a house consists of 50m of 15mm outside diameter copper pipe with a…
A:
Q: e The side walls of a refrigerator are made from two thin layers of sheet metal, each 1/8 in. thick,…
A: Given data as per the question The thickness of metal sheet =1/8 in =0.0104 ft The thickness of the…
Q: A domestic refrigerator with inner dimensions of 0.7 m by 0.7 m at the base and height 1 m was…
A:
Q: Circumferential fins of constant thickness of 1 mm are fixed on a 60 mm pipe at a pitch of 4 mm. The…
A: Free stream temperature is not given in the question. Assuming free steam temperature is 25o C. To =…
Q: 150 circular copper wings ( k=400 W/m C) with a diameter of 5 cm and a thickness of 1 mm were…
A:
Q: A domestic refrigerator with inner dimensions of 0.7 m by 0.7 m at the base and height 1 m was…
A:
Q: Thermodynamics problem. A membrane type electrical heater of 20,000 w/m? capacity is sandwiched…
A:
Q: A domestic refrigerator with inner dimensions of 0.7 m by 0.7 m at the base and height 1 m was…
A:
Q: A domestic refrigerator with inner dimensions of 0.7 m by 0.7 m at the base and height 1 m was…
A: Area A= 0.7×0.7m2 = 0.49m2 The resistance for Aluminium at inner thermal layer is given by - Rth =…
Q: A central heating system from a house consists of 50m of 15mm outside diameter copper pipe with a…
A:
Q: A steel tube having k =46W/m•C has an inside diameter of 3.0 cm and a tube wall thickness of 2 mm is…
A:
Q: A 50-cm-diameter pipeline in the Arctic carries hot oil at 30°C and is exposed to a surrounding…
A: given data:- diameter d0=50cm Hot oil temperature Ti=30degree surrounding temperature T∞=-20degree…
Q: A steam pipe with outside diameter 10 mm, passes through a room, the surface temperature of the pipe…
A:
Q: A 15 cm outer diameter steam pipe is covered with 5 cm of high temperature insulation (K = 0.85…
A: The solution is given below
Q: 1. Steam in a heating system flows through tubes whose outer diameter is 5 cm and whose walls are…
A: Given dataro=30mmt=1mmh=40W/m2KTs=180°CT∞=25°CL=1mD=0.05m
Q: A domestic refrigerator with inner dimensions of 0.7 m by 0.7 m at the base and height 1 m was…
A:
Q: A motor body is 350 mm in diameter (outside) and 300 mm long. Its surface temperature should not…
A: Given:
Q: A steel tube with 5 cm internal diameter, 7.6 cm outer diameter and k=15W/m °C is covered with an…
A:
Q: A steel pipe 150mm external diameter conveys steam at a temperature of 260°c and it is covered by…
A:
Q: Pin fins are provided to increase the heat transfer from a hot surface. The perimeter of each fin is…
A: Arrangement 2 will have higher heat transfer rate.
Q: One vessel having a carbon-steel wall of thickness 5 mm carrying saturated steam and water at 423K.…
A:
Step by step
Solved in 3 steps
- 3.10 A spherical shell satellite (3-m-OD, 1.25-cm-thick stainless steel walls) re-enters the atmosphere from outer space. If its original temperature is 38°C, the effective average temperature of the atmosphere is 1093°C, and the effective heat transfer coefficient is , estimate the temperature of the shell after reentry, assuming the time of reentry is 10 min and the interior of the shell is evacuated.Determine the rate of heat transfer per meter length to a light oil flowing through a 2.5-cm-ID, 60-cm-long copper tube at a velocity of 0.03 m/s. The oil enters the tube at 16C, and the tube is heated by steam condensing on its outer surface at atmospheric pressure with a heat transfer coefficient of 11.3 kW/m K. The properties of the oil at various temperatures are listed in the following table: Temperature, T(C) 15 30 40 65 100 (kg/m3) 912 912 896 880 864 c(kJ/kgK) 1.80 1.84 1.925 2.0 2.135 k(W/mK) 0.133 0.133 0.131 0.129 0.128 (kg/ms) 0.089 0.0414 0.023 0.00786 0.0033 Pr 1204 573 338 122 552.38 The addition of aluminum fins has been suggested to increase the rate of heat dissipation from one side of an electronic device 1 m wide and 1 m tall. The fins are to be rectangular in cross section, 2.5 cm long and 0.25 cm thick, as shown in the figure. There are to be 100 fins per meter. The convection heat transfer coefficient, both for the wall and the fins, is estimated to be K. With this information determine the percent increase in the rate of heat transfer of the finned wall compared to the bare wall.
- 1. Saturated steam at 500 K flows in a 0.20 m inside diameter, 0.21 m outside diameter pipe. The pipe is covered with 0.075 m of insulation with a thermal conductivity of 0.10 W/m-K. The pipe's conductivity is 52 W/m-K. The ambient temperature is 300 K. The unit convective coefficients are hi = 18,000 W/m²-K and ho 12 W/m²-K. Determine the heat loss (kJ/min) from 5 m of pipe.1. Saturated steam at 500 K flows in a 0.20 m inside diameter, 0.21 m outside diameter pipe. The pipe is covered with 0.08 m of insulation with a thermal conductivity of 0.10 W/m-K. The pipe's conductivity is 52 W/m-K. The ambient temperature is 300 K. The unit convective coefficients are h; = 18,000 W/m²-K and ho = 12 W/m²-K. Determine the heat loss (kJ/min) from 4 m of pipe. • show conversions, units, and box in your final answersA steel duct whose internal diameter is 5.0 cm, and external diameter is 7.6 cm and thermal conductivity is: k = 15.0 (W/(m ºC)) is covered with an insulating material whose thickness is 2.0 cm and of thermal conductivity k = 0.2 (W/(m ºC)). A hot gas flows through the interior of the duct at a temperature of 330.0 ºC that generates a heat transfer coefficient by forced convection h=400.0 (W/(m^2 · ºC)). The outer surface of the insulating layer is exposed to air whose temperature is 30.0 ºC with forced convection heat transfer surface h = 60.0 (W/(m^2 · °C)). As a process engineer and in charge of company operations, you have been asked to: i. Determine the heat loss experienced by the pipe along 10.0 m.ii. The temperature drops that are generated in the different thermal resistances of the system. That is, on the air side, the duct wall and on the hot gas side.
- Heat Transfer with a Liquid Metal. The liquid metal bismuth at a flow rate of 2.00 kg/s enters a tube having an inside diameter of 35 mm at 425°C and is heated to 430°C in the tube. The tube wall is maintained at a temperature of 25°C above the liquid bulk temperature. Calculate the tube length required. The physical properties are as follows (H1): k = 15.6 W/m K, c,=149 J/kg K, u = 1.34 x 10-3 Pa s.i. A very long rod 5 mm in diameter has one end maintained at 100 oC. The surface of the rod is exposed to ambient air at 25 oC with convection heat transfer coefficient of 100 W/m2-K and thermal conductivity is 180 W/m-K. Determine the temperature distribution along the rod and What is the heat loss. ii. Water flows on the inside of a steel pipe with an ID of 2.5 cm. The wall thickness is 2 mm, and the convection coefficient on the inside is 500 W/m2◦C. The convection coefficient on the outside is 12 W/m2 ◦C. Calculate the overall heat-transfer coefficient.You are designing a 3m x 3m floor with radiant heating. The floor has 12 parallel pex pipes (k = 40 W/mK) of L = 3m, OD = 25mm and ID = 20mm. Hot water (TInfintiy 1 = 90oC, h = 200 W/m2K) runs through the pipes continuously. The surface below the pipes is perfectly insulated. Above the pipes, there is a 3mm layer of bonding material (? = 12 W/mK) and a 9mm layer of tile (k = 2 W/mK). Above the tile, there is air (TInfinity 2 = 25oC, h = 20 W/m2K). Properties of Air: k = 0.025 W/mK, Pr = 0.72, v = 1.847 x 10−5, u = 16.84 x 10−6, p = 1.2 kg/m3, B = 1/Tf (ideal gas), Hint: Assume that the “layer” of pipe starts at the center point (e.g. for conduction purposes, the pipe is OD divided by 2 thick). For convection, consider the entire pipe surface. a) What is the total heat rate entering the room above the floor? b) What is the temperature of the top of the tile?
- A composite plane wall consisting of materials, 1.5-in steel (k = 312 BTU-in/HR.ft2.0F) and 2-in aluminum (k = 1400 BTU-in/HR.ft2.0F), separates a hot gas at Ti = 2000F, hi = 2 BTU/HR.ft2.0F, from cold gas at To = 80 deg F, ho = 5. If the hot fluid is on the aluminum side, find: a) Transmittance, U; b) The heat through 100 sq. ft of the surface under steady state condition and c) The interface temperature at the junction of the metals.8--The reactor from uniform carbide and graphite as a cylinder rod with diameter of 12 mm. The volumetric heat liberationis 3.88x108 W/m3 The thermal conductivity of the rod material is 85 W/mC.. Determine the heat losses from the rod and the surface temperature if the maximum temperature of the rod is 200C...Ans Tw=1940 C,,Heat losses=1.164 MW/m2.A body having a cylindrical shape of length equals to 1.9 m and diameter equals to 400 mm is inside a room where the ambient temperature is equal to 300 K. The initial temperature of the body is equal to 350 K. If the heat convective coefficient is equal to 1.3 W/m^2.K. What condition should the thermal conductivity k verify in order to apply the lumped capacitance method.