Question 4: 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.
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: 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: Q2: A circular tube transmits hot oil at 250-C inside a 10-cm-inside-diameter tube such that hi 2000…
A:
Q: A house has a composite wall of wood, fiberglass insulation and plaster board, as indicated in…
A:
Q: 36. Aluminium fins (k = 200 W/m.K) of rectangular profile are attached on a plane wall with 5 mm…
A:
Q: Q2. Steam pumped through a long- insulated pipe at a temperature of T= 500 K and provides a…
A:
Q: Steel pipe (outer diameter 100 mm) is covered with two layers of insulation. The inner layer, 40 mm…
A:
Q: QUESTION 41 A domestic refrigerator with inner dimensions of 0.7 m by 0.7 m at the base and height 1…
A:
Q: Consider heat loss through the two walls of a house on a winter night. The walls are identical,…
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: Q1) One end of a copper rod (k = 380 W/m.K), 300 mm long is connected to a wall which is maintained…
A:
Q: A cylindrical tube with inner and outer radius are 10 mm and 20 mm respectively and the temperature…
A:
Q: QUESTION 44 A domestic refrigerator with inner dimensions of 0.7 m by 0.7 m at the base and height 1…
A:
Q: Heat Transfer Consider a infinitely long pin fin with uniform Ac cross sectional area Write ef…
A: Given data Write effectiveness and efficiency for infinitely long pin fin with uniform Ac cross…
Q: Find the minimum amount of diameter for the insulation of a spherical water tank? Radius of the tank…
A: Given Data The radius of the tank, 10m Thermal conductivity, k=25W/m2K convective coefficient is 5…
Q: A steel pipe (outside diameter 100 mm) is covered with two layers of insulation. The inside layer,…
A:
Q: A thin brass pipe, 3 cm in outside diameter, carries hot water at 85°C. It is proposed to place 0.8…
A: Given :- Outside Diameter : 3cm thickness : 0.8 mm
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: Steel pipe (outer diameter 100 mm) is covered with two layers of insulation. The inner layer, 40 mm…
A: Given Data Outer diameter of the steel pipe is: do=100 mm=0.1 m Thickness of the inner layer is:…
Q: A liquid food is being pumped in a 1 cm thick steel pipe. The inside diameter of the pipe is 5 cm.…
A: “Since you have posted a question with multiple subparts, we will solve first three sub parts for…
Q: 3. A 3 in O.D. aluminum tube (k=133 BTU/h ft°F) has 16 longitudinal fins spaced around its outside…
A: Give data: The outer diameter of the tube, do=3 in. The thermal conductivity of aluminum, k=133…
Q: Given: Fin length: 45 mm Fin width: 90 mm Fin thickness: 5 mm Thermal conductivity of fin material:…
A: Given Length, L = 45 mm = 0.045 mm Width, w…
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 3 inch schedule 40 pipe is covered with two layers of…
A: Given data: 3 inch schedule-40 pipe means nominal diameter is 3 inch and it's outside diameter is,…
Q: A flat-bottom barge is towed on a water surface at 2.57 m/s. The barge is 3.66 m wide and 6.10 m…
A: Given Data The velocity of the barge, V=2.57 m/s Width of the barge, b=3.66m Length of the barge,…
Q: For your company you need to mass produce 20-cmx10-cm heat sinks to dissipate heat quickly from an…
A: Given data, Dimension of the base/sink = 0.2 m×0.1 m Convective heat transfer coefficient of the…
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: Q3/ For a flat plate collector having the following characteristics as shown in the table; calculate…
A:
Q: Calculate the rate of heat loss (in W) through the wall. Follow-up question to Question 1,…
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=0.7×0.7 m2 = 0.49 m2The resistance for insulation layer (polyurethane) is given - Rth=…
Q: A 10 ft length of pipe with an inner radius of 1 in and outer radius of 1.25 in has an outer surface…
A:
Q: 1. For a steam pipe with a given diameter of 10 cm covered by two (2) layers of insulation. The…
A: (a) Write the data given in the problem. T2=27°C r1=10 cm2 =5 cm r2=5 cm+4 cm =9 cm r3=9…
Q: Steel pipe (outer diameter 100 mm) is covered with two layers of insulation. The inner layer, 40 mm…
A: Given The outer diameter of the pipe is do=100 mm. The thickness of inner layer insulation is ti=40…
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: Question 5 Heat transfer A domestic refrigerator with inner dimensions of 0.7 m by 0.7 m at the base…
A:
Q: A ball made of steel alloy with a diameter of 2 millimeters is first heated to 800 degrees and then…
A: Given: Diameter of the ball (d)=2mmInitial temperature of the ball (Ti)=800°CTemperature of the…
Q: Calculate the rate of heat loss per foot and the thermal resistance for a 15 cm schedule 40 steel…
A:
Q: Steel pipe (outer diameter 100 mm) is covered with two layers of insulation. The inner layer, 40 mm…
A: Given data: The diameter of the steel pipe, d = 100 mm. The thickness of the inner insulation, t1 =…
Q: QUESTION 2 The wall of a refrigerated truck consists of 1.5mm sheet steel outer surface, 10mm…
A:
Q: Steel pipe (outer diameter 100 mm) is covered with two layers of insulation. The inner layer, 40 mm…
A: Given The outer diameter of the pipe is do=100 mm. The thickness of inner layer insulation is ti=40…
Q: Question 1 The exterior wall of a building consists of 100 mm thick face brick (k = 0.9 W/m-K), 40…
A:
Q: 150 circular copper fins (k = 400 W / m ° C) of 5 cm diameter and 1 mm thickness are attached to a…
A: Write the given data with suitable variables. n=150kfin=400 W/m-°Cdfin=5 cm=0.05 m100 cm1 mdpipe=3…
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: is exposed to cooler air at 30 °C with h = 60 W²/m °C. Calculate the heat loss from the tube to the…
A: d1=5cm=0.05mr1=0.025md2=7.6cm=0.076mr2=0.025mRadius,r3=r2+Insulation…
Q: Water flows on the inside of a steel pipe with an ID of 2.5 cm. The wall thickness is 2 mm, and the…
A: Given data: Inner diameter (d) = 2.5 cm = 0.025 m Thickness of the wall…
Q: A motor body is 350 mm in diameter (outside) and 300 mm long. Its surface temperature should not…
A: Given:
Q: A) If you increase cross-sectional area effectiveness will drop B) epsilon is proportional to…
A: Option c is correct none of the above
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: Calculate the heat loss per linear ft from 2 in. nominal pipe (2.375 in. outside diameter) covered…
A:
Q: he convection heat transfer coefficient between a surface at 40°C and air at 20°C is 20 W⁄m2 − K.…
A: Given Heat transfer coefficient, h = 20 W⁄m2.K Initial Temperature, T1 = 40°C…
Question 4:
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.
Trending now
This is a popular solution!
Step by step
Solved in 4 steps
- A 1000 m³ cubic building (meaning it is a cube with sides of length 10.0 m) has concrete walls 20 cm thick. Concrete has a thermal conductivity of 1.25 W/(mK). An indoor temperature of 21 C is maintained. If it is -15 C outside determine the rate of heat loss from the building. Answer: Check ✓ Choose... W JFor your company you need to mass produce 20-cmx10-cm heat sinks to dissipate heat quickly from an equipment. After considering several other parameters, you have short-listed two possible designs: A. 72 straight pin fins made of an alloy (thermal conductivity 240 W/m-°C) that costs $9,000 per m³. Each pin is 4 cm long and 1-cm diameter. E.=3'18; $204 B. 64 straight rectangular fins made of another alloy (thermal conductivity 180 W/m.°C) that costs $12,000 per m³. Each pin is 4 cm long and has 2-cmx1-cm cross-section. Eo =7:94%$ 6·14 The convection coefficient of the operating condition is approximated as 15 W/m2.°c. Consider that the manufacturing cost is same for both designs but the material cost differs. Calculate and compare the cost and performance (in terms of heat transfer gains by the heat sinks) of the two heat sinks so that a decision can be made to select a design.1.19 A square isothermal chip is of width w = front surface is exposed to the flow of a coolant at T = 15°C. From reliability considerations, the chip temperature must not exceed T = 85°C. 5 mm on a side and is mounted in a substrate such that its side and back surfaces are well insulated; the Coolant Chip If the coolant is air and the corresponding convection coefficient is h = 200 W/m² · K, what is the maximum allowable chip power? If the coolant is a dielectric liquid for which h = 3000 W/m² · K, what is the maximum allowable power?
- Task 02 Water flows through a cast steel pipe ( k = 50 W/m.K ) with an outer diameter of 104 mm and 2 mm wall thickness. (i). Calculate the heat loss by convection and conduction per metre length of un insulated pipe when the water temperature is 15 0C , the outside air temperature is -10 0C , the water side heat transfer coefficient is 30 kW/m2.K and the outside heat transfer coefficient is 20 W/m2.K . (ii). Calculate the corresponding heat loss when the pipe is lagged with insulation having an outer diameter of 365 mm, and thermal conductivity of k= 0.05 W/m.KAnswer this ASAP The diameter of the tube is 25 mm. The specific heat of water is 4.18 kJ/kg.°C. The overall heat transfer coefficient is 0.7 kW/m².°C. 1. Schematic of temperature distribution 2.ΔTLMTD 3.Actual heat transfer rate 4.Cmin 5.Maximum heat transfer rateQ1: Water at 80 oC is pumped through 100 m of stainless steel pipe, k=16 W/m.K of inner and outer radius 47 mm and 50 mm respectively. The heat transfer coefficient due to water is 2000 W/m2.K. The outer surface of the pipe loses heat by convection to air at 20 oC and the heat transfer coefficient is 200 W/m2.K. Calculate the heat flow through the pipe. Also calculate the heat flow through the pipe when a layer of insulation, k=0.1 W/m.K and 50 mm radial thickness is .wrapped around the pipe
- Q2- Water flows inside a steel pipe with an ID of 2.5 cm. The wall thickness is 2 mm, and the convection coefficient on the inside is 100 Wm? C. The convection coefficient on the outside is 10 W/n C. The pipe is covered with a layer of asbestos. 1-determine the thickness of the asbestos layer at the critical insulation radius of the pipe. 2-calculate the change percent of heat transfer with and without the insulation. 3-commet on your results,Answer this ASAP The diameter of the tube is 25 mm. The specific heat of water is 4.18 kJ/kg. °C. The overall heat transfer coefficient is 0.7 kW/m².°C. 1.Cmin 2.Maximum heat transfer rate 3.Heat transfer surface area3. A cylindrical pipe of negligible thickness holding a hot fluid at 140°C and having an outer diameter of 0.4 m is insulated with three layers of each 50 mm thick insulation of k₁ = 0.02: k2 = 0.06 and k3 = 0.16 W/m-K (starting from inside). The outside surface temperature is 30°C. Solve for the value of T2 (°C). • show conversions, units, and box in your final answers
- The thermal conductivities of wood is kwood = 0.1W/(m°C)and air is kair = 0.0234W/(m°C). Part A If the temperature of the room is 20°C and outside is 10°C, find the rate of heat flow for a wall of wood with area = 10 m² and thickness of 5cm. O 60 W O 304 W O 34 W O 200 W O 100 W Submit Request Answer Part B The wall of wood with thickness of 5cm is now replaced with two layers of wood and a gap of air between the wood. Each layer of wood has a 2.5cm thickness and the gap is 1cm. The rate of heat flow will, decreases. increases. stay the same. Submit Request Answer Part C The temperature in the air gap will be, O 20°C, between 10°C and 20°C, O 10°C,Find the thermal resistance r (in hr - °F/BTU) and the equivalent R-value (in hr ft?. °F/BTU) of a typical frame 20' x 7.5" wall consisting of a 0.5" plaster board on the inside of the room, nominai 2 x 4 studs, and a 0.5" sheathing on the outside. The spaces between the studs are filled with an R-15 insulating foam. What is the heat loss (in BTU) through this wall in four hours if the inside temperature is 72°F and the outside temperature is 32°F? (Assume that the 15% of the wall's area are studs and the remaining 85% is filled with the insulating foam. Assume that the air is moving outside the wall.) r= 0.0805 x hr: OF/BTU R=0.09 x hr ft2. F/BTU AQ = BTUunder steady-state conditions. If you are given T1 = 200 °C and T2 = 164 °C, determine: a) the conduction heat flux, q,.cond, in m2 W from x = 0 to x = L b) if the dimensions of the triangle ares 15 mm and h 13 mm, calculate the heat transfer due to convection, q,y, in W at x = L Finsulation T2 T T = 20°C h = 500 W/m2.K Triangular Prism x L x 0 L= 50 mm k = 100 W/m-K