A composite wall consists of wood and steel. The bond between the wood and steel is not perfect, resulting in small air gaps at the interface. At steady-state, temperature 1 (T;) is greater than temperature 2 (T2). Which of the following represents the temperature distribution? O wood O steel T a. d. b.
Q: A family enters a winter vacation cabin has been unheated for such a long time the interior…
A: Given:Volume of the room, V=4 m×4 m×3mV=48 m31 m3=1000 LV=48000 LPower, P=2 kW
Q: Bowen ratio is estimated to be about 0.2. Estimate the sensible heat and latent heat fluxes to the…
A: Ratio=HHL=0.2 RN=800W/m255m deepMixed ocean =0.12°C Sea surface =27°C To-Find:- Sensible and latent…
Q: Radiative Heat Transfer. Two plane disks each 1.25 m in diameter are parallel and directly opposed…
A:
Q: A vertical cylinder 6 ft tall and 1 ft in diameter might be used to approximate a man for…
A:
Q: • Derive an expression for the temperature distribution within a sphere that has inner radius r,…
A: To derive an expression for the temperature distribution within a sphere.
Q: Question 12. The temperature u(x, t) of a narrow metal rod of length L = 1 with a heat source is…
A: Given that, ut=uxx+1-xut-uxx=1-x ............. 1u0,t=3, u1,t=5, t>0,ux,0=4+x…
Q: Draw and label the graph of this set of processes in the P-V and T-S diagram showing the state point…
A:
Q: 2. Consider the temperature distributions associated with a dx differential control volume within…
A: a)In steady state heat transfer the temperature of any body only changes with space(position). The…
Q: Two thermal reservoirs are connected by a solid copper bar. The bar is 2 m long, and the…
A: The temperature distribution represents the temperature at finite points on the surface. The…
Q: The composite wall of an oven consists of three materials, two of which are of known thermal…
A:
Q: Use propagation of error to calculate the uncertainty of latent heat of fusion in water
A: Introduction: During the melting process, the solid and liquid phases of a pure substance are in…
Q: The composite wall of an oven consists of three materials, two of which are of known thermal…
A:
Q: Given 1-D steady-state conduction through a wall with uniform heat generation, the heat transfer (Q,…
A: (a) Consider the diagram shown below for the wall.
Q: In steady state, the heat transfer coefficient "k" is L=0.5 m Left face temperature of infinitely…
A: Given data as per questionT=250°Ch=40W/mKL=0.5mk=10W/mkqu=5×104W/m3
Q: If I accidentally dropped my cooked steak off the deck into the snow, how much snow could it melt?…
A: maximum snow will melt when the steak will reach 0 celcius and the heat released will be used as…
Q: 6. (a) The temperature distribution across a wall of an aluminium cylin- der block, 4 mm thick at a…
A:
Q: A plane wall of thickness 8cm and thermal conductivity k=5W/mK experiences uniform volumetric heat…
A: Given data: Wall thickness = 8 cm Thermal conductivity = k = 5 W/mK…
Q: Question 2 The composite wall of an oven consists of three materials, two of which are of known…
A:
Q: An electric heater with a capacity P is used to heat air in a spherical chamber. The inside radius…
A: Given data h = 6.5W/m2 C , P = 1, 500 W, e = 0.81,Tsur=18ck = 2.4W/moC,Ri = 10 cm, Ro= 14 cm. Given…
Q: Consider a perfectly insulated thin rod of arbitrary finite length, rod is heated with extenal heat…
A: In this problem we discuss about thin rod of arbitary finite length which have uniform distributed…
Q: Calculate the heat lost from the cylinder. Repeat for a wall temperature of 80°F. What do you…
A: Given: d= 1 ft L= 6 ft surface temperature=78 F h=2 Btu/hr emissivity=0.9 To determine heat transfer…
Q: vertical cylinder 6 ft tall and 1 ft in diameter might be used to approximate a man for…
A:
Q: if the ice absorbs a mean of 98 J/m2 -s, 12.5 hrs per day?
A: Given that, Dimension of rectangular iceberg, V=250 km×50 km× 300 mExposed area of heating, A=250…
Q: Two large containers A and B of the same size are filled with different fluids. The fluids in…
A:
Q: A cylinder with a diameter of 46 mm is heated on one end, causing a temperature gradient of 240°C/m…
A:
Q: c) The heat transfer rate into the salmon fillet is governed by its surface thermal resistance, R…
A: The heat transfer rate into the salmon fillet is governed by its surface thermal resistance, R °K/W…
Q: State 1. The critical radius of insulation for a cylinder is given by 2. In transient heat…
A: 1: True The critical radius of insulation for cylinder is given by, 2: True In transient heat…
Q: A room has a pine ceiling [ k = 0.12 W/(m•C°) ] that measures 3.0 m x 4.0 m x 2.0 cm. On a cold day,…
A:
Q: (i) A pipe carrying steam at about 300°C traverses a room, the air being still at 30°C. The major…
A: Solution: Note: Dear Student! As per our guidelines, we are only allowed to answer three sub-parts…
Q: EXAMPLE 2.3 A= 10 m? =1000 Wim k=D40 Winrk p= 1600 kgn 4 kiigK The temperature distribution across a…
A:
Q: (C) The composite wall of a refrigerator consists of three different materials; A, B, and C. Two of…
A:
Q: (a) The temperature distribution across a wall of an aluminium cylin- der block, 4 mm thick at a…
A:
Q: Situation: The specific heat of an object can be measured by placing it in thermal contact with…
A:
Q: Variable Heat Generation and Equation of Energy Change. A plane wall is insulated so that conduction…
A: Conduction is one of the three primary methods through which heat energy is transferred from one…
Q: number 1 A food product containing 82% moisture content is being frozen. Estimate the specific heat…
A: A food product with 82% moisture content,82% of the water is in frozen state ,specific heat of dry…
Q: A flat plate of length 0.3 m is maintained at a temperature of 42°C. A stream of water 6.62, v=…
A: given; ⇒length of flate plate(l)=0.3m⇒temperature of plate(T1)=420c⇒Pr=6.62⇒kinematic…
Q: A plane wall of thickness 20 mm is exposed to surrounding air at 30 °C. A heat source of 500 W/m³ is…
A:
Q: u(x,t) is solution to steady state 2-D heat equation, d'u d'u -=0,with following parameters for…
A: Given data: ∂2u∂x2+∂2u∂y2=0 u00=u(0,0)u(0,y)=0u(1,y)=y(1-y) →0<y<2u(x,0)=0u(x,2)=x(1-x)…
Q: Assuming a constant flow, the equation governing the transfer of heat energy Q as a function of time…
A: Given : To find : Heat equation
Q: food product containing a water content of 85% is frozen. Estimate the heat type products at -10 °C…
A:
Q: Find the two-dimensional temperature distribution T(x,y) and midplane temperature T(B/2,W/2) under…
A: Thermal conductivity, k = 400 W/mk q0 = 1000 W/m2 Temperature at mid plane needs to be evaluated
Q: known thickness, La = 300 mm and Lc = 150 mm. The third material, B, which is sandwiched between…
A:
Q: The temperature distribution across a wall 0.8 m thick is T(x)=a+bx+cx², where T is in °C and x is…
A:
Q: (C) The composite wall of a refrigerator consists of three different materials; A, B, and C. Two of…
A:
Q: Water enters a tube at 27°C with a flow rate of 450 kg/h. The rate of heat transfer from the tube…
A:
Q: The lumped system analysis assumes a uniform temperature distribution Select one: a. Throughout the…
A: Biot Number is a relative measure between conductive resistance in solid to the convective…
Q: An exterior wall's insulation is made up of the following materials: 2" cork (K = 0.025, BTU hr-ft-F…
A:
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 1 images
- (Q4) A thermopile 18 constructed with Iron-constantan materials. Four junctions are maintained at 300°C and for junctions are maintained at 40°C. The output of the thermopile is connected to a potentiometer. What voltage will be indicated if both terminals of the potentiometer are at the same temperature? What is the temperature indicated in this case?As shown in the sketh below, a steam pipe of 0.12-m inside diameter is insulated with a layer of calcium silicate. 12. Ts.2} 1, Ts,1} Steam Insulation 800 K and T,2 490 K, respectively, (a) If the insulation is 25 mm thick and its inner and outer surfaces are maintained at T,1 what is the rate of heat loss per unit length (d ) of the pipe, in W/m? (b) Determine the rate of heat loss per unit length (d'), in W/m, and outer surface temperature T,2, in K, for the steam pipe with the inner surface temperature fixed at T,1 = 800 K, inner radius rį = 0.06 m, and outer radius r2 = 0.16 m. The outer surface is exposed to an airflow (T, = 25°C) that maintains a convection coefficient of h = 25 W/m2-K and to large surroundings for which Tsur 25°C. The surface emissivity of calcium silicate is approximately 0.8.As shown in the sketh below, a steam pipe of 0.12-m inside diameter is insulated with a layer of calcium silicate. 12. Ts.2} 1. Ts,1} Steam Insulation (a) If the insulation is 17.5 mm thick and its inner and outer surfaces are maintained at T,1 = 800 K and Ts,2 = 490 K, respectively, what is the rate of heat loss per unit length (q') of the pipe, in W/m? (b) Determine the rate of heat loss per unit length (q'), in W/m, and outer surface temperature T.2, in K, for the steam pipe with the inner surface temperature fixed at Ts,1 The outer surface is exposed to an airflow (T = 800 K, inner radius ri = 0.06 m, and outer radius r2 = 25°C) that maintains a convection coefficient of h = 25 W/m2-K and to = 0.1 m. large surroundings for which Tsur = T_ = 25°C. The surface emissivity of calcium silicate is approximately 0.8.
- 4 ) Every temperature measuring instrument makes use of specific physical property in order to measure temperature objectively . Which physical properties are used in thermocouple , PT sensors and mercury - in - glass thermometer ? Briefly describe each of this methods.The principles of Newton’s Law of Cooling. You can imagine and create your own data. Discuss the nature and origin of the four (4) types of coffee where it originates. Various settings, formulations, containers, and the number of trials will be properly discussed in their methodology. Once the experimentation has been done, the thermal coefficient shall be computed and recorded. The temperature coefficient acquired at t=0 and t= 5 mins, will be tested at t = 6,7,8,9 and 10 minutes.A J-type thermocouple with an ice-reference junction showed a reading of 22 mV. After the experiment, it was found that the actual temperature of the reference junction is 4ºC instead of 0ºC. Calculate the actual value of the measured temperature. I understand the question, I don’t understand why you don’t add the increase to all the other values when finding the “gradient” if the reference was found to be 0.204 higher
- A wall measures (9x3) m2 and it consists of the following layers, the wall has one door and two windows with an area of 1.8 m2 and 3.5 m2, respectively. The wall consists of the following layers: (1) Hard stone of 70 mm thickness and k = 1.7 W/m.°C. (2) Concrete of 200 mm thickness and k = 1.75 W/m.°C. (3) Polystyrene of 50 mm thickness and k = 0.04 W/m.°C. (4) Plaster of 20 mm thickness and k = 1.25 W/m.°C. The inside and outside design conditions are (22°C, 50% RH) , and (7 °C, 90% RH) respectively, and the inside and outside film resistances are 0.12 and 0.03 m2.°C/W, respectively. Calculate the following: (a) Heat loss through the wall (b) Inside wall surface temperature. (c) Heat loss with no insulation, will the water vapor condense on the wall?A wall of a house is made from two layers of bricks enclosing a layer of insulation. A radiator is positioned to cover the whole internal surface, and used intermittently when the internal temperature is low. The external surface is exposed to the outside air. Which of the following assumptions could be used to identify the relevant reduced form of the conduction equation to find the temperature in the wall. a. Conduction is mainly in two directions. b. Conduction is mainly in one direction. c. The wall properties are homogeneous. d. Steady conditions exist. e. Unsteady conditions exist. f. There is an internal volumetric heat generation in the wall.As shown in the sketh below, a steam pipe of 0.12-m inside diameter is insulated with a layer of calcium silicate. 12. Ts.2} 1, Ts,1} Steam Insulation = 490 K, respectively, (a) If the insulation is 27.5 mm thick and its inner and outer surfaces are maintained at T,1 what is the rate of heat loss per unit length (q) of the pipe, in W/m? = 800 K and T,2 (b) Determine the rate of heat loss per unit length (q'), in W/m, and outer surface temperature T,2, in K, for the steam pipe with the inner surface temperature fixed at T1 = 800 K, inner radius rį = 0.06 m, and outer radius ry = 0.12 m. The outer surface is exposed to an airflow (T, = 25°C) that maintains a convection coefficient of h = 25 W/m2-K and to large surroundings for which Tsur = T, = 25°C. The surface emissivity of calcium silicate is approximately 0.8. %3D
- As shown in the sketh below, a steam pipe of 0.12-m inside diameter is insulated with a layer of calcium silicate. 1. Ts. 1} Steam 12. T8.2} Insulation (a) If the insulation is 27.5 mm thick and its inner and outer surfaces are maintained at T1 = 800 K and T2 = 490 K, respectively. what is the rate of heat loss per unit length (q') of the pipe, in W/m? (b) Determine the rate of heat loss per unit length (q'), in W/m, and outer surface temperature T2, in K, for the steam pipe with the inner surface temperature fixed at T₁ = 800 K, inner radius r₁ = 0.06 m, and outer radius r₂ = 0.14 m. The outer surface is exposed to an airflow (To = 25°C) that maintains a convection coefficient of h = 25 W/m²-K and to large surroundings for which Tsur = To = 25°C. The surface emissivity of calcium silicate is approximately 0.8.(3-5) A composite furnace wall has an inside wall temperature of 1100 C and an outside wall temperature of 38 C. The types of bricks are available as follows: brick k, W/m-k Thickness, cm Max allowable temp, °C 1. 1.45 10.5 2 0.18 5.5 875 3 0.50 7.0 200 The heat loss must not exceed 0.73 kw/ m?. 3. Determine the minimum wall thickness 4. The actual heat loss for (6) 5. The temperature between the last two bricks counting from the inside.Question 2: The composite wall of an oven consists of three materials, two of which are of known thermal conductivity, kA 20 W/m K and kC50 W/m K, and known thickness, LA 0.30 m and LC 0.15 m. The third material, B, which is sandwiched between materials A and C, is of known thickness, LB 0.15 m, but unknown thermal conductivity kB. Under steady-state operating conditions, measurements reveal an outer surface temperature of Ts,o 20°C, an inner surface temperature of Ts,i 600°C, and an oven air temperature of T 800°C. The inside convection coefficient h is known to be 25 W/m2 K. What is the value of kB?