A 10-m long pipe carrying brine at – 8°C passes through a room at 30°C. The outside diameter of the pipe is 15 cm and the convection coefficient has a value of 18 W/m2 ·K. In order to reduce the heat gain, molded insu

Q: There are 3 people in a hemispherical house with an inner radius of 1.8 m, designed for short-term…

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Q: Heat is generated in a 2.0-cm-square copper rod at the rate of 30 MW/m³. The rod is exposed to a…

A: Given data: a=2.0 cmQ˙=30 MW/m3T∞=25°Ch=5 kW/m2 Need to determine the surface temperature of the…

Q: During a visit to a plastic sheeting plant, it was observed that a 60-m-long section of a 2-in…

A: Write the given information. Write the expression of the film temperature. Write the properties of…

Q: A 50-m-long section of a steam pipe whose outer diameter is 10 cm passes through an open space at…

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Q: Consider a person standing in a breezy field at 10°C. Determine the total rate of heat transfer from…

A: In heat transfer analysis, the rate of change of state is evaluated by calculating the rate of heat…

Q: 2. Two 4-m-long and 0.4-cm-thick cast iron (k = 52 W/m·K) steam pipes of outer diameter 10 cm are…

A: givenDi=9.2cm  =0.092mDO=10cm =0.10mso Ai=πDJL =π×0.092×8 =2.312m2A0=πDOL =π×0.1×8 = 2.513m2

Q: A hot surface at 100 °C is to be cooled by attaching 3-cm-long, 0.25-cm-diameter aluminum pin fins…

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Q: Hot square plate (1 m ×1 m) is to be cooled by attaching aluminum circular pin fins (D=0.25 cm, L= 3…

A: Given:- Plate=(1×1)m2D=0.25 cmL=3 cmd=0.6 cmTb=100°CT∞=30°Ch=35 W/m. °C. To find:-Total rate of heat…

Q: Q1) A 0.3-cm-thick, 12-cm-high, and 18-cm-long circuit board houses 80 closely spaced logic chips on…

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Q: A 2-m × 1.8-m section of wall of an industrial furnace burning natural gas is not insulated, and the…

A: Answer: The thickness of the insulation that needs to be used is 4.68 cm.

Q: 1. A 1000-W iron is left on the iron board with its base exposed to the air at 20°C. The convection…

A: Heat Transfer

Q: A 40-cm-long, 0.6-cm-diameter electric resistance wire is used to determine the convection heat…

A: Giiven A 40-cm-long, 0.6-cm-diameter the convection heat transfer coefficient = 254 surface…

Q: In a new residential project, you strongly believe that double-paned windows are ‘better’ than…

A: Heat transfer Heat transfer is the phenomena in which heat energy is transfer from high temperature…

Q: On a multi-layered square wall, the thermal resistance of the first layer is 0.005 ° C / W, the…

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Q: There are 3 windows in a room with a width of 100 cm and a height of 150 cm. There is a single glass…

A: Given:Width of window, w=100 cm or 1 mHeight of window, h=150 cm or 1.5 mthermal conductivity of…

Q: Steam at 230°C is flowing through a steel pipe (k = 15.1 W/m-K) whose inner and outer diameters are…

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Q: A 3-mm-diameter and 5-m-long electric wire is tightly wrapped with a 2-mm- thick plastic cover…

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Q: A 5 m long section of a steam pipe whose outer diameter is 10 cm passes through an open space at…

A: Given data: The length of pipe, L=5 m. The diameter of the pipe, d=10 cm. The open space…

Q: A pipe carrying steam of 5 cm inside diameter and 6.5 cm outside diameter is covered with a 2.75 cm…

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Q: A 50 meter long cast iron pipe with outer diameter of 10 cm passes in an open space of 288 K…

A: Given,  L = 50 m d2 = 10 cm = 0.1 m To = 288 K Ti = 423 K Combined heat transfer Coefficient (h) =…

Q: In a new residential project, you strongly believe that double-paned windows are ‘better’ than…

A: Area of window=1.5×1 m2thickness of pane=0.4 cm=0.004 mk of glass pane=0.9 wm.kIndoor…

Q: A plate heated with a heat flux of 5 kW/m^2 and has an emissivity of 0.3. the air is over the plate…

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Q: A 6 cm diameter cylinder is initially at a temperature of 10 °C. Later, this cylinder was thrown…

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Q: Consider a cold aluminum canned drink that is initially at a uniform temperature of 4°C. The can is…

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

A: Given: diameter = 2cm Ti = 100 deg C T = 25 deg C Tinf = 13 deg C cp = 0.385 kJ/kgK = 385 J/kgK

Q: A cylindrical fuel rod of 2 cm in diameter is encased in a concentric tube and cooled by water. The…

A: Given data:

Q: = A hot surface at 100°C is to be cooled by attach- ing 3-cm-long, 0.25-cm-diameter aluminum pin…

A: Introduction: Fins are utilized in many applications to improve heat transfer from surfaces. The fin…

Q: A 6-m-long section of an 9-cm-diameter horizontal hot-water pipe passes through a large room whose…

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Q: Hot water at an average temperature of 70°C is flowing over a 15-m section of a cast iron pipe (k =…

A: Given: Hot water temperature is 70°C. Length of pipe is 15 m. Thermal conductivity of CI pipe is 52…

Q: Steam at 235°C is flowing inside a steel pipe (k = 61 W/m ∙ °C) whose inner and outer diameters are…

A:

Q: In a new residential project, you strongly believe that double-paned windows are ‘better’ than…

A:

Q: A person puts a few apples into the freezer at 15°C cool them quickly for guests who are about to…

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Q: Steam at 200ºC flows in a cast iron pipe (k = 80 W/m⋅ºC) whose inner and outer diameters are D1 =…

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Q: A 30-m-long section of an 8-cm-diameter horizontal hot water pipe passes through a large room whose…

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Q: An aluminum pan whose thermal conductivity is 237 W/m °C has a flat bottom with diameter 20 cm and…

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Q: Consider a room with a 1.8-m-high and 2.0-m-wide double-pane window consisting of two 4-mm-thick…

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Q: Required information A cylindrical fuel rod (k = 30 W/m K) of 2 cm in diameter is encased in a…

A: Given:Surface temperature of rod, Ts=200o CTs=200o C or 473 KEgen˙=100 MW/m3d= 2 cmr=1 cm or 0.01…

Q: The passenger compartment of a minivan traveling at 60 mph can be modeled as a 3.2-ft-high,…

A: Write the given information. Write the properties of air at 80°F.

Q: .5 cm, respectively. The pipe is covered with 3-cm-thick glass wool insulation (k = 0.038 W/m⋅K).…

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Q: 2. A hot surface at 100°C is to be cooled by attaching 3-cm-long, 0.25-cm-diameter aluminium pin…

A:

Q: Consider a person standing in a breezy room at 20°C. Determine the total rate of heat transfer from…

A: Given: Room temperature is 20°C. Exposed area of the person is 1.6 m2. Surface temperature of the…

Q: An average man has a body surface area of 1.8 m2  and a skin temperature of 330C. The convective…

A: Let A = Surface area of man body =1.8m2 V =1.2m/s h =Heat Transfer Coefficient =8.6XVX0.53 h…

Q: A 12-m-long and 5-m-high wall is constructed of two layers of 1-cm-thick sheetrock (k = 0.17 W/m·K)…

A: Given Data: The dimension of the wall is: 12m X 5 m The thermal conductivity of wood stud is: h…

Q: A 12 m long and 5 m high wall is constructed of two layers of 1 cm thick sheetrock (& = 0.17 W/m.…

A:

Q: Steam at 235°C is flowing inside a steel pipe(k = 61 W/m·K) whose inner and outer diameters are10 cm…

A: Given data: Inner dia of steel pipe, Di =10cm Outer dia of steel pipe, Do=12 cm Inside Heat transfer…

Q: A 30-m-long section of an 8-cm-diameter norizontal hot water pipe passes through a arge room whose…

A: As per the calculation, the nearest option is b.

Q: A 0.3-cm-thick, 12-cm-high, and 18-cm-long circuit board houses 80 closely spaced logic chips on one…

A:

Q: sof? =120°Cand?

A: given:outer radius r2=7cminner radius r1=5cmthermal conductivity k=25W/mKT1=120CT2=50C