The resistance wire of a heater is composed of nichrome (a nickel-chromium alloy), completely surrounded by a 1/8 in (k = 0.15 BTU / h ftºF) layer of asbestos, and this in turn, surrounded by another layer of 1/8 in.thick stainless steel (k = 10 BTU / h ftºF). If the core temperature of the wire is kept constant at 1000 F, the convective heat transfer coefficient is 3 BTU / h ft ºF, and the ambient temperature is 70ºF. Calculate: a) The heat flux delivered to the wire in BTU / h ft^2 b) The outside temperature of the wire in ºF

Q: The wall of a refrigerator is constructed of fiberglass insulation (k = 0.035 W/m⋅K) sandwiched…

A:

Q: steam exits the turbine of a steam power plant at 105 F and is to be condensed in a large condenser…

A:

Q: Steam flows in an insulated pipe at a temperature 130 C. The inside heat transfer coefficient is 79…

A:

Q: The wall of a refrigerator is made of fiberglass insulation (k = 0.035 W/mK) glued between two 1 mm…

A: Given data: Troom=24°CTs,out=20°Ch=9 W/m2K Need to determine the minimum thickness of fiberglass…

Q: Calculate the overall heat transfer coefficient of the steel pipe based on the inner surface. The…

A: Calculate the overall heat transfer coefficient of the steel pipe based on the inner surface, U…

Q: Calculate the heat loss rate with: A) The uncoated sphere; B) The sphere covered with an insulating…

A: 1. Diameter of the sphere D = 6 cm ==> radius r = 3 cm 2. Atmospheric Temperature T∞= 25 °C 3.…

Q: Airat temperature of 120 °C is contained in a thin-wall steel tube with heat-transfer coefficient 65…

A: Dear student, I have calculated overall heat transfer coefficient on the basis of inner and outer…

Q: .A journal bearing is to be used for a centrifugal pump where the shaft diameter is 50 mm and the…

A: Given that, Shaft diameter = D = 50 mm Bearing length = L = 80 mm Ambient temperature = T∞=20 °C…

Q: The 5-mm-thick bottom of a 200-mm-diameter pan may be made from aluminum (k= 240 W/m·K) or copper…

A: Given:Heat transfer from the stove to the pan, Q=1200 WDiameter of pan, d=200 mm or 0.2 mthermal…

Q: The wall of a refrigerator is constructed of fiberglass insulation (k = 0.035 W/m·K) sandwiched…

A:

Q: Determine the overall heat loss and the temperature profile at each interface of the following…

A: Introduction: When two temperature limitations exist, heat transfer occurs owing to temperature…

Q: The 5-mm-thick bottom of a 200-mm-diameter pan may be made from aluminum (k = 240 W/m-K) or copper…

A:

Q: ) The wall of a refrigerator is constructed of fiberglass insulation (k =0.035 W/m °C) sandwiched…

A:

Q: Steam exiting the turbine of a steam power plant at 40°C is to be condensed in a large condenser by…

A: Consider below image for cross section across copper tube,   From the data given in question, T2 =…

Q: based on the information given here. Steam in a heating system flows through tubes whose outer…

A: Given                      Surface area, A = 0.001916 m2       Thermal conductivity, k = 186 W/ moC…

Q: To cool a storehouse in the summer without using a conventional air-conditioning system, the owner…

A: Given that, Writing the property of air,

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 dataAb=0.7×0.7h=1mTi=6°Ctal=10mmtpol=30mmhi=11.6 wm2kho=14.5 wm2kTo find1)individual…

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: Energy management and Audit question A steam main 150mm outside diameter containing wet steam at 28…

A:

Q: 2. You have a 2.5 m x 10 m, R- 18 effective wall, that includes a window that is 4 m by 2 m that is…

A: Write the given data. Awall=2.5 m×10 m=25 m2Awindow=4 m×2 m=8 m2hwindow=0.43 W/mK

Q: Problem 1. How water at an average temperature of 90°C is flowing through a 15-m section of a cast…

A: Given: Average temperature of water T∞1=90°CInner diameter of the cast iron pipe (D1)=4cm or…

Q: Q5. A long copper rod of diameter 2.0 cm is initially at a uniform temperature of 100 C. It is now…

A:

Q: Consider a stainless steel spoon (k = 15 W/m·K) partially immersed in boiling water at 95°C in a…

A:

Q: The cylinders that come out of the heat treatment furnace are cooled in a stagnant air environment…

A:

Q: 32. A bare fuel rod has a diameter of 0.373 in and length of 12 ft. The volumetric heat generation…

A:

Q: Convective heat transfer coefficient is 15 W/(m*K), surface area of the fin is 2 m^2, the…

A: Given :-    Area of fin, A= 2m2 Base temperature, Tb = 70°C = 343K Ambient temperature, To = 20°C =…

Q: stainless steel plate at 100◦C faces a firebrick wall at 500◦C.Esti- mate the heat flux and…

A: Solution as follows

Q: The resistance wire of a heater is composed of nichrome (a nickel-chromium alloy), completely…

A: Given data: t1=t2=18in=0.01041 ftk1=0.15 BTU/h.ft°Fk2=10 BTU/h.ft°FT1=1000°Fh=3 BTU/h.ft2°FTa=70°F…

Q: It is proposed to air-cool the cylinders of a combustion chamber by joining an aluminum casing with…

A:

Q: The wall of a refrigerator is constructed of fiberglass insulation (k = 0.035 W/m·K) sandwiched…

A:

Q: Consider a stainless steel spoon (k ! 8.7 Btu/h · ft · "F) partially immersed in boiling water at…

A:

Q: A domestic refrigerator with inner dimensions of 0,7 m by 0,7 m at the base and height 1m was…

A:

Q: 3- Stainless steel ball bearings have a diameter of 1.2 cm are to be quenched in water. The balls…

A: Given Data: The diameter of ball bearings is, d=1.2 cm=1.2 cm×m100 cm=0.012 m. The uniform…

Q: A transformer that is 1.5 m long, 0.062 m wide, and 0.05 m high is to be cooled by attaching a 1.5-m…

A:

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: Determine the overall heat loss and the temperature profile at each interface of the following…

A:

Q: 3JA tirbine blade 6 cm long and having a cross sectional area 4.65 cm and perimeter 12 cm is made of…

A: Data given-

Q: A cylindrical can of pea puree has a diameter of 68.1 mm and a height of 101.6 mm. The can is…

A: Given DataT0=29.4°CH=101.6mT1=115.6α=2..007×10-7m2/sDia=68.1mm As Question not mention but this…

Q: The 5-mm-thick bottom of a 200-mm-diameter pan may be made from aluminum (k = 240 W/m-K) or copper…

A:

Q: The rate of heat transfer per unit area from a metal plate is 1000 W/m^2 . The surface temperature…

A: Given, Rate of heat transfer rate per unit area (heat flux) = q = 1000 W/m2 Surface temperature = Ts…

Q: Which of the following is true for a large heat transfer coefficient? A. It is equivalent to a zero…

A: Heat transfer coefficient is the heat transfer per unit area per unit temperature. The heat transfer…

Q: A conductor with a diameter D= 0.8 cm, covered by an electric current, passes through an environment…

A: Given:- D=0.8cm=0.008m T0 = 30 °C Ti= 130 °C h= 120 W/(m² °C) l=1m k=1.2 W/(m°C) To find:- Heat loss…

Q: The 10-mm-thick bottom of a 200-mm-diameter pan may be made from aluminum (k = 240 W/m-K) or copper…

A:

Q: Steam exiting the turbine of a steam power plant at 40°C is to be condensed in a large condenser by…

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:

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.