Consider an insulated pipe exposed to the atmosphere, then the critical radius of insulation:
Q: Blowtorch is used to connect the two pipes together. Length of the pipe section shown is 95 cm with…
A: Given: l=0.95m; d=0.65m; t=2.5mm k=157 W/m2K; ambient temperature 20 deg C; h=20 W/mC; and melting…
Q: How much heat is conducted through a sheet of plate glass,
A: for solution refer below images.
Q: A steel pipe of outside diameter of 0.051 m is insulated with a 0.0064-m thickness of asbestos…
A:
Q: What is the thermal conductivity of a material with 65% water based Spell's equation? O 0.4265…
A: Answer: The thermal conductivity of a material 0.4265 W/m•K. Hence, option (a) is correct one.
Q: A wall of house may be approximated by 5.5 in layer of brick flowed by 3 in asbestos layer. what…
A:
Q: A manufacturer of loose-fill cellulose insulating material provides a table showing the relationship…
A: Consider k as the thermal conductivity of the material, x as the thickness and R as the thermal…
Q: The oven of a stove must have a sufficient insulation so that the surface temperature of the stove…
A: Given: Ts=50∘Ck= 0.11 W/m-KTroom=20∘Ch∞=8 W/m2KT∞=315 ∘C
Q: Two bars A and B, each of length 2m and cross sectional area 1m^2, are placed end to end. Their…
A: Given Thermal conductivity, kA = 339 W/mK kB = 837 W/mK…
Q: Blowtorch is used to connect the two pipes together. Length of the pipe section shown is 80 cm with…
A: Given: l=0.8m; d=0.7m; t=3mm; k=177 W/m2K; ambient temperature is 25 C; h=20 W/mK; Tb=220 C
Q: Determine the resistance of an aluminium coil of 183 cm as diameter consists of 13600 turns and the…
A: Given data: Diameter of aluminium coil d=1.83 m number of turns n=13600 Mean length per turn l=35.24…
Q: a) What is the heat loss per meter of pipe, in W / m?
A:
Q: A steel pipe (outside diameter 100 mm) is covered with two layers of insulation. The inside layer,…
A:
Q: Example 2 A cylindrical steam pipe having an inside surface temperature of 250 °C has an inside…
A:
Q: Question 6 A steel pipe (k = 48 W/m-K) of a heating system carries wet steam at 120 °C. The inner…
A: Given: The conductivity of steel pipe is k1=48 W/m·K. The temperature of the steam is T1=120°C. The…
Q: A corner bedroom is situated on the second story of a two-story house. Thehouse is designed for a…
A: First we calculate the area of the window, Area of the…
Q: Q2: Calculate the critical radius of insulation for asbestos [k = 0.162 W/m K] surrounding a pipe…
A:
Q: Two long rods of the same diameter, one of brass(k= 85 W/mK) and the other of copper (k=375 W/mK)…
A:
Q: A rectangular fin (k= 180 W/M••C): with AC=0.003 m2 , P =2 m and L 0.07 m protrudes from a wall. The…
A:
Q: 9.3 In order to reduce the heat loss through a large furnace wall, the decision has been made to add…
A: One-dimensional heat transfer through a simple or composite body exposed to convection from both…
Q: An one end of a solid object with length L has a temperature of T1 and the other end has T2.…
A:
Q: What is the thermal resistance of a spherical shell with 12 in OD and an internal radius of 5 in.?…
A: Q)Given dataouter diameter of spherical shell=12ininner radius=5ink=25btu/hr ft.FTo…
Q: An office space contains one (6'x 3') well- fitted door made of nominal 2" wood. The heat loss…
A: Given data: Tbi=80° F=299.817 KTo=-10° F=249.817 KA=6×3 ft2=1.67225 m2t=2 in=0.0508 mQ=517.2…
Q: Calculate the heat loss per linear ft from 2 in. nominal pipe (2.375 in. outside diameter) covered…
A:
Q: 5) In a resistance microwelding process, the applied voltage is 3.5 V and overall contact resistance…
A:
Q: B- A pipe 1.2 m in length having an inside surface temperature of 260 C has an inside diameter of 8…
A:
Q: A steel pipe (outer diameter D=6-cm, and k=53-W/m.K) is to be insulated with insulation…
A:
Q: Blowtorch is used to connect the two pipes together. Length of the pipe section shown is 150 cm with…
A: Given data: Here, L represents the length, di represents the internal diameter, t represents the…
Q: Q5/ A hot steam pipe having an inside surface temperature of 250 C has an inside diameter of 8 cm…
A:
Q: Blowtorch is used to connect the two pipes together. Length of the pipe section shown is 150 cm with…
A: Given: L = 150 cm t = 4 mm Di = 85 cm Do = Di + 2t = 85 + 8 = 93 cm thermal conductivity, k = 167…
Q: A straight fin of rectangular profile ( k = 14 W/m . oC ) , thickness of t= 2 mm and L= 23 mm . The…
A: Given Data: The thermal conductivity of the fin is, k=14 W/m·°C. The thickness of the fin is, t=2…
Q: The diameter of a cast iron manhole cover at 23°C is 500 mm. To what temperature should the cover be…
A: Given: d=500 mmT1=23°C∆d=1 mmα=13×106°C
Q: For a current carrying wire of 20 mm diameter exposed to air (h = 20W / (m ^ 2) * K) maximum heat…
A:
Q: the resistance of the coil.
A: Given: n= 2000 d=2.5 mm= 0.0025 m l=80 cm =0.8 m ρ=0.02 μΩm=0.02×10-6 Ωm To determine: The…
Q: 4. Derive the critical radius of insulation for a spherical shell.
A: Given data To derive the critical radius of insulation for a spherical shell.
Q: 12.6-1. Insulation Needed for Food Cold Storage Room. A food cold storage room is to be constructed…
A: Write the expression of heat loss.
Q: A house's exterior wall consists of 15 cm layer of brick (k = 0.75 W/m-°C) followed by 4 cm layer of…
A:
Q: A domestic pitched roof of tiles on felt sacking with a plasterboard ceiling has an existing u-value…
A: New u-value = 0.25W/m2K Thermal conductivity of the fiberglass, k = 0.04 W/mK The minimum thickness…
Q: why the resistance of small machine is greater than the resistance of the large machine??
A: Resistance in machines :
Q: A power transistor is specified to have a maximum junction temperature of 150°C. When the device is…
A:
Q: builder has run out of those stud and started using pairs of 2.5 m long wood stud with cross…
A: Given the thermal conductvitites are given to be k = 0.11 w/m°c for wood stud and k = 50w/m°c for…
Q: (III) Suppose the insulating qualities of the wall of a house come mainly from a 4.0-in. layer of…
A: R value of the brick is Thermal conductivity of brick is 0.84 J/m·s°C R=lk=4 in0.84…
Q: What is critical thickness of insulation? Explain its importance and derive the expression to…
A: Critical thickness of insulation is the maximum thickness of the insulation up to which if the…
Q: A house has a composite wall of wood, fiberglass insulation and plaster board, as indicated in…
A:
Q: If temperature difference is doubled whereas thermal conductivity and wall thickness are halved,…
A: Heat conducted through wall is given by, Q = k A ∆T∆x Where, k = Thermal conductivity A =Cross…
Q: Calculate the heat loss per linear ft from 2 in. nominal pipe (2.375 in. outside diameter) covered…
A:
Step by step
Solved in 2 steps with 2 images
- A stainless-steel plate at 100˚C faces a firewall at 500 ˚C. Estimate the heat flux and radiation heat transfer coefficient hr.A very long copper rod (k =372 W/m•C) is 2.5 cm in diameter and has one end maintained at 93° C. The rod is exposed to 38° C fluid. The convective coefficient is 3.5 W/m^2•C. How much heat is lost by the rod?Sipho’s mother is making a fire in the stove inside a shack using coal. A fan is used to extract the flue gasfrom the fire via a chimney made of zinc material. The wall thickness of Chimney is L=4mm and the walltemperature of the chimney on the flue gas side is T_si=60˚C. Sipho, playing outside next to the chimneyexperiences an ambient temperature of 20˚C. The surrounding temperature is T_sur=35˚C and the emissivityis ε=0.95. Assume the convection coefficient is 20W/m2K and the chimney is grey material.Under these conditions determine the outer surface (air side) temperature T_so=? of the chimney.
- An one piece window, surface area of 14 m2 and thickness of 5.0 mm, has inner surface temperature of 10 °C, and outer surface temperature is -10 °C. Calculate the con- duction rate through the window. Use 0.80 W/(K·m) for the thermal conductivity of the glass.(i) Find the thickness of an isolated block in ‘meter’ capable of being charged to 2.4 x 106Volt potential before sparking into the air, given that dielectric strength of air is 24,000V/cm. (ii) Find the heat energy(flow) in ‘Joules’ required to prepare a coffee in an electric kettlewith 0.5 litre (1litre = 10-3 m3) of water which is heated from 30ºC to 85ºC?Take density of water as 1000 kg /m3and Specific heat of water as 4.187 kJ/kg º K.Either free or forced convection is good by considering an example. please explain
- Aluminum balls are heated up to 580 K and then exposed to air at 283 K to cool down with an average heat transfer coefficient of 25 W/m2·K. The balls are 3 cm in diameter. Find the temperature at r = 0.5 cm after 75 seconds of exposure. Is the lumped capacitance an acceptable solution here? [Ans.: 329 K].The solar power striking Earth every day averages 168watts per square meter. The highest ever recorded electricalpower usage in New York City was 13,200 MW. A recordestablished in July of 2013. Considering that present technologyfor solar energy conversion is about 10% efficient,from how many square meters of land must sunlight becollected in order to provide this peak power? (For comparison,the total area of New York City is 830 km2.)Determine the effiency of the fin ?
- Heat Transfer Questiion is image a) Calculate the emitted heat flux from the surface in W/m2 blankA black thermocouple is inside a chamber with black walls. If the air around the thermocouple is 20 oC, the walls are at 100 oC and the heat transfer coefficient between the thermocouple and the air is 75W/m2- K. What temperature will the thermocouple read?Solve for interface temperatures. Given: heat transfer due to radiation= 507.415 W/m2