For the calaulation of heat transfer by natural transport from a horizontal cylinder, what is the dcharadteristic length found in the number Gr. Please select one: a. Length b. Half of the perimeter c. None of them d.Diameter e. Environment
Q: Heat Transfer Question. Please explain step by step for the better understanding, thanks.
A: Given that, Thickness of Codfish, t=102 mm,Initial temperature of codfish, To=10 °C,Surface…
Q: How important the forced and free convection know as a mechanical engineer?
A:
Q: A jacketed reactor heats a stream of water from 10°C to 54°C as an initial part of sauce production…
A:
Q: A rectangular aliminium bar 0.06 m by 0.03 m [k=200 W/(mK), Cp=890 J/(kgK), g=2700…
A: L=.06 m and h=.03 m and lets assume width unity w=1 mK=200 WmK,cp=.890 kJkgKρ=2700 kgm3, α=8.4×10-5…
Q: The heat transfer through a wall 25’x10’ is 8750 Btu/ hr. The outdoor air and surface temperature =…
A: Given Data→ Dimensions of wall 25'×10' Heat Transfer through a wall Q=8750 Btuhr Outdoor air and…
Q: Determine if the following heat transfer scenario can be simplified to steady heat transfer by…
A: All three conditions are categorized in S or 1D type. 1. 1D 2. S + 1D 3. 1D + S
Q: A 1 mm diameter spherical thermocouple bead (Cp = 400 J/kg K, p=7800 kg/m³) is required to respond…
A: Given data:
Q: à heat transfer takes place by convection _with ficient of h = 60 W/m2 · °C. Calculate (a) the…
A:
Q: The presence of thermal reservoir of a Geothermal Power Plant, supplements the generation of power…
A:
Q: A solid sphere (ρ= 800 kg/m3, cp = 4000 J/kg-K, k = 0.4 W/m-K) of diameter 1 cm is taken out of the…
A: Given: The density of solid sphere = 800 kg/m3 The specific heat capacity, cp = 4000 J/kg.K The…
Q: For internal forced convection, friction factor f can be found by using either the Moody charts, the…
A: The Moody chart or Moody diagram (also Stanton diagram) is a graph in a non-dimensional form that…
Q: Brass cube "p 8530 kg/m, c = 380 J/kg.°C, k 110 W/m.°C, a = 33.9E-6 W/m.°C", side length=9 mm, are…
A: Option B is correct.
Q: Wind (v=1.5 m/s) at -10 oC blows at right angle to the surface of a standing student considered…
A: Wind velocity, V=1.5 m/s Wind temperature, Ta=-10oC Diameter, D=25cm=0.25m Length, L=170m Surface…
Q: A vertical cooling fin approximates a flat plate 800 mm in height is.exposed to saturated steam at…
A: Given: A vertical cooling fin approximates a flat plate of x=800 mm. The temperature of saturated…
Q: 15- A west wall group C at (32 oN, Kw = 0.83). The %3D room temperature is (24 oC). The maximum…
A:
Q: day you Reep front windshield surface temperature at +3 °C by blowing hot air on the inside surface.…
A:
Q: A square pin fin (w=0.6 mm, L-33 mm) is attached to hot surface, Ts-155°C with convection heat…
A: Given:Square pin fin, w=0.6mm=0.0006m…
Q: AS STOWIT IIT the ske Delow, steam pipe of ue ulanmeter is Insulate u with d layer oI lum sincate.…
A:
Q: A copper sphere of 18 mm diameter (density = 8960 kg/m3 and CP= 0.38 kJ/kg K) is exposed to air at…
A: Diameter of copper sphere, D=18 mmDensity of copper, ρ=8960 kg/m3Cp=0.38 kJ/kg.KAir Temperature,…
Q: Q2:- A sphere made of pure copper, which is 13 mm in diameter, is 70 °C (at t=0) when it inserted…
A:
Q: Q6 a) A 10-cm dia. copper ball is to be heated from 100 *C to till average temperature of 150 °C in…
A: Part A) Now find the total heat transfer as follows.
Q: Passage of an electric current through a long condu rod of radius r; and thermal conductivity k,…
A:
Q: A radioactive sphere of 20-cm diameter generates heat at the rate of 300 W. It is cooled by placing…
A:
Q: Roof insulation: Insulation of the bare roof with 50 mm thick of polystyrene foam, roof area = 99m?,…
A: The thickness and thermal conductivity of the mediums through which heat is transmitted affect the…
Q: Create one problem solving about Steady-State Heat Flow (Heat convection fluid). Show your solution.…
A:
Q: The maximum temperature (Tme) at the center of a long and solid cylindrical electric wire of radius…
A:
Q: A long cylindrical nuclear fuel rod has the following steady-state temperature distribution: T(6) =…
A:
Q: 15- A west wall group C at (32 oN, Kw = 0.83). The %3D room temperature is (24 oC). The maximum…
A:
Q: tompelalure dimerence, d) conduction when the temperature at a point varies with time. d) A…
A:
Q: 17.Find the heat flow during 5.0 h through a glass window of thickness 0.20 in. with an area of 40…
A: We have to determine the heat flow
Q: A liquid flows inside a 3-cm diameter pipe, 5 meters long with an entering temperature of 350 °C.…
A:
Q: A CHIMNEY OF 24M HEIGHT is VSED TO PRODUCE A NATURAL DRAUGHT WHEN FLUE GAS TEMPERATURE IS 300°C AND…
A: The answer is
Q: A food product with 80% water content in a 10 cm diameter can be frozen. Mass of the product type is…
A: Given data, x = Moisture contains in the food product = 0.8 a = Diameter of the food product = 0.1 m…
Q: A 2kW stainless-steel electrical kettle with capacity 2 liters is used to obtain steam from tap…
A: Given:- Power = 2 kW = 2000 W The temperature ambient = 20 deg…
Q: Water (C, = 4180 J/kg-K) enters a 4-cm-diameter tube at 15°C at a rate of 0.06 kg/s. The tube is…
A: As per given question we have to define lengths of tube.
Q: Q4. A block of pure aluminum, initially at 90°C, is placed in front of a fan. ASsuming lumped…
A: given data al block initially at 90 degree C
Q: 8) The temperatude the two Suxfaces on R5mm thiek stel ppe (K48 w/nfc) heat generation 120°c Neg…
A:
Q: Plate glass 5 mm thick at 200°C is to be cooled from both sides using air at 40°C. If surface cracks…
A:
Q: Name an example from daily life (different from the text) for each mechanism of heat transfer.
A: The three modes of heat transfer are conduction, convection, and radiation. 1)Conduction: It is a…
Q: A certain liquid flow inside a 4 cm diameter pipe, 6 meter long with an entering temperature of 350…
A: Given data: di=4 cmL=6 mT=350°CTw=575°Cm˙=60 kg/minPr=0.003μ=0.003 N.s/mk=6.2 w/m-k, Cp=0.41 kj/kg-k…
Q: Write down the one dimensional heat flow equation in unsteady state.
A: The generalized heat flow equation for any cases is as follows: ∂2T∂x2+∂2T∂y2+∂2T∂z2+q.K=1α∂T∂τ This…
Q: In 1 paragraph, make a narrative of what you have learned in Heat Transfer
A: Solution: The narrative on Heat Transfer is given below:
Q: A thermocouple in the form of a long cylinder of 2 mm dia initially at 30°C is used to measure the…
A:
Q: 50. The surface of a cylinder, having a diameter of 25 cm, is maintained at 140 C. Air flows over…
A: Given dataTemperature at the surface of the cylinder = Ts= 140°CTemperature of the air flowing over…
Q: B- A Blood warming device contains a 20 mm diameter copper pipe is used to carry warm water, the…
A:
Q: Ex- A Steel ball fcp=0.46 KJ/kgx, K=35w/mk] 50mm in diametir and initially ata uniformtempf 50e is…
A: Given dataDiameter of the steel ball d= 50mmSpecific heat of steel ball cP = 0.46 kJ/kg KThermal…
Q: A car's rear window is defogged by the passage of hot air over its inner surface. If the hot air is…
A:
Q: 10-mm-inner-diameter pipe made of commercial steel is used to heat a liquid in an industrial…
A:
Step by step
Solved in 2 steps with 2 images
- To maximize production and minimize pumping costs, crude oil is heated to reduce its viscosity during transportation from a production field. (1) Consider a pipe-in-pipe configuration consisting of concentric steel tubes with an intervening insulating material. The inner tube is used to transport warm crude oil through cold ocean water. The inner steel pipe (k, = 45 W/m-K) has an inside diameter of D;, 1 150 mm and wall thickness f; = 20 mm while the outer steel pipe has an inside diameter of D; 2 = 250 mm and wall thickness t, = tị. Determine the maximum allowable crude oil temperature to ensure the polyurethane foam insulation (k, between the two pipes does not exceed its maximum service temperature of Tp. max = 70°C. The ocean water is at T.0 = -5°C and provides an external convection heat transfer coefficient of h. flowing crude oil is h; = 450 W/m²-K. 0.03 W/m-K) 500 W/m2-K. The convection coefficient associated with the (2) It is proposed to enhance the performance of the…What is the heat loss coefficient that has a symbol Uair and is found from (volumetric flow * density * specific heat capacity) of a building with a volume of 23814 cubic feet, if there is a natural air change per hour of 0.04? Review Appendix A.5 Provide your answer in units of BUT/(hr F). Answer:The left side of this equation tells how much energy Q the cylinder gives to the water while it cools. The right side of this equation tells how much energy Q the water and aluminum cup absorb from the cylinder to warm up. Because it is the same energy, they are equal. What is known in this equation? Mcyl 411.7 g, malum 46.5 g, malum+water = 175 g Can you find: mwater =? g Twater = Talum = 20°C (water and cup of room temperature) 90°C, T; = 35°C (hot cylinder and cool "cylinder+cup+water" temperatures) Tcyl kCal Calum = 0.22, Cwater 1 (specific heat of water and aluminum, measured in units kg-°C What are we looking for is Ccul - How we find it? Plug all the numbers into the equation (1), Ccul will be one unknown which you can calculate from the equation. Important, convert all the masses from grams to kilograms! After you find Ccyl, compare it to known value for the copper 0.093(our cylinder is made out of copper). |Ceyl -0.093| % : · 100% 0.093
- V:01 Expert Q&A Done Question 1: In your own words, write down the differences between thermodynamic and heat transfer. (3 Marks) Question 2: Estimate the heat loss per square metre of surface through a brick wall 0.5 m thick when the inner surface is at 400 K and the outside surface is at 300 K. The thermal conductivity of the brick may be taken as 0.7 W/mK. (2 Marks) Question 3: A furnace is constructed with 0.20 m of firebrick, 0.10 m of insulating brick, and 0.20 m of building brick. The inside temperature is 1200 K and the outside temperature is 330 K. If the thermal conductivities are as shown in the figure below, estimate the heat loss per unit area. (5 Marks) 1200 K 330 K Insulating brick X-0.10m k= 0.21 Ordinary brick X=0.20 m Fire brick X= 0.20 m k= 1.4 k= 0.7 (W/mK)What is the molecular mass of a gas if C =1915 J/kgK. Cy = 1.50 KJ/kgK and universal gas constant 8.314 KJ/kmolK? Select one: O a. 30 O b. 15 O .20 O d. 25PLEASE SHOW SOLUION STEP BY STEP WITH UNITS. PLEASE ANSWER IT IN 30 MINS. TOPIC: THERMODYNAMICS - PROCESSES OF GASES
- Solve correctly please. Water with a bulk temperature of 70 F flows through a 2-inch chart 80 steel pipe. The temperature of the steam condensing outside the pipe is 210 F and the heat transfer rate is 1600 Btu/h F Rr. If the heat transfer coefficient of the current flowing through the pipe is 400 Btu/hr F, calculate the heat transfer rate in kW for 1 m of pipe. (Gpt/ ai wrong answer not allowed)Find the amount of heat lost per hour through a square foot ofbuilding wall composed of 18-in. sandstone and 3/4-in. metal lath andplaster separated by a 1 1/4-in. air space, when the temperature of theroom is 70 °F, the outdoors is 10 °F, and the wind velocity is 15 mph.What is the rate of heat transfer through a piece of celotex 3 ft by 8 ft by 1 inch thickness, if the temperature of one surface is 80 deg. F and of the other surface is 60 deg. F.
- A differential equation encountered in the vibration of beams is d4ydx4=2D where x = distance measured along the beam; [x]=[L] y = displacement of the beam; [y]=[L] = circular frequency of vibration; []=[T1] = mass of the beam per unit length; []=[ML1] D = bending rigidity of beam; [D]=[FL2] Show that the equation is dimensionally homogeneous. Note that [F]=[MLT2] see Eq. (1.21:).Good day. I require assistance as this will help in my examination review. (Basic Aerodyn Priciples) Air with an initial temperature of 18.03°C undergoes an isentropic process. After the isentropic process the density is halved, determine the new temperature. Provide answer in Kelvin. Round off answer to the nearest hundredths. **Would gladly appreciate an explanation. Thank you.FLUID MECH Support your answer with the appropriate solution and diagram. 3. A rectangular raft made of solid timbers (s=0.60) is 3 m wide and 6 m long x 60 cm thick. A man weighing 800 N steps on the edge of the at the middle of one of the longitudinal sides. Determine by how much the thickness of the raft will be depressed below the water surface along the side in mm. A. 10 B. 20 C. 30 D. 40