Question

1- Determine the thermal conductivity of 4 in. (100 mm) of insulation with a unit conductance of 0.2 Btu/(hr-ft2-F) [1.14 W/(m2-C)] in (a) English units and (b) SI units. 2- Compute the unit conductance C for 5.5 in. (140 mm) of fiberboard with a thermal conductivity of 0.3 Btu-in./(hr-ft2-F) [0.043 W/(m-C)] in (a) English units and (b) SI units. 3- Compute the unit thermal resistance and the thermal resistance for 100 ft2 (9.3 m2) of the glass fiberboard for Problem 5-2 in (a) English units and (b) SI units 4- What is the unit thermal resistance for an inside partition made up of 3/8 in. gypsum board on each side of 6 in. lightweight aggregate blocks with vermiculite-filled cores? 5- Compute the overall thermal resistance of a wall made up of 100 mm brick (1920 kg/m3) and 200 mm normal weight concrete block with a 20 mm air gap between. There is 13 mm of gypsum plaster on the inside. Assume a 7 m/s wind velocity on the outside and still air inside. 6- A frame wall is modified to have 3.5 in. of mineral fiber insulation between the studs. Compute the overall heat-transfer coefficient U if the unit thermal resistance without the insulation is 4.44 (hr-ft2-F)/Btu. Assume a mean temperature of 0 F and a temperature difference of 20 F. 7- Compute the overall average coefficient for the roof-ceiling combination shown in Table 5-4b with 3.5 in. of mineral fiber batt insulation (R-15) in the ceiling space rather than the rigid roof deck insulation.

          1- Determine the thermal conductivity of 4 in. (100 mm) of insulation with a
unit conductance of 0.2 Btu/(hr-ft2-F) [1.14 W/(m2-C)] in (a) English units
and (b) SI units.
2- Compute the unit conductance C for 5.5 in. (140 mm) of fiberboard with a
thermal conductivity of 0.3 Btu-in./(hr-ft2-F) [0.043 W/(m-C)] in (a) English
units and (b) SI units.
3- Compute the unit thermal resistance and the thermal resistance for 100 ft2
(9.3 m2) of the glass fiberboard for Problem 5-2 in (a) English units and (b)
SI units
4- What is the unit thermal resistance for an inside partition made up of 3/8 in.
gypsum board on each side of 6 in. lightweight aggregate blocks with
vermiculite-filled cores?
5- Compute the overall thermal resistance of a wall made up of 100 mm brick
(1920 kg/m3) and 200 mm normal weight concrete block with a 20 mm air
gap between. There is 13 mm of gypsum plaster on the inside. Assume a 7
m/s wind velocity on the outside and still air inside.
6- A frame wall is modified to have 3.5 in. of mineral fiber insulation between
the studs. Compute the overall heat-transfer coefficient U if the unit thermal
resistance without the insulation is 4.44 (hr-ft2-F)/Btu. Assume a mean
temperature of 0 F and a temperature difference of 20 F.
7- Compute the overall average coefficient for the roof-ceiling combination
shown in Table 5-4b with 3.5 in. of mineral fiber batt insulation (R-15) in
the ceiling space rather than the rigid roof deck insulation.

1- Determine the thermal conductivity of 4 in. (100 mm) of insulation with a
unit conductance of 0.2 Btu/(hr-ft2-F) [1.14 W/(m2-C)] in (a) English units
and (b) SI units.
2- Compute the unit conductance C for 5.5 in. (140 mm) of fiberboard with a
thermal conductivity of 0.3 Btu-in./(hr-ft2-F) [0.043 W/(m-C)] in (a) English
units and (b) SI units.
3- Compute the unit thermal resistance and the thermal resistance for 100 ft2
(9.3 m2) of the glass fiberboard for Problem 5-2 in (a) English units and (b)
SI units
4- What is the unit thermal resistance for an inside partition made up of 3/8 in.
gypsum board on each side of 6 in. lightweight aggregate blocks with
vermiculite-filled cores?
5- Compute the overall thermal resistance of a wall made up of 100 mm brick
(1920 kg/m3) and 200 mm normal weight concrete block with a 20 mm air
gap between. There is 13 mm of gypsum plaster on the inside. Assume a 7
m/s wind velocity on the outside and still air inside.
6- A frame wall is modified to have 3.5 in. of mineral fiber insulation between
the studs. Compute the overall heat-transfer coefficient U if the unit thermal
resistance without the insulation is 4.44 (hr-ft2-F)/Btu. Assume a mean
temperature of 0 F and a temperature difference of 20 F.
7- Compute the overall average coefficient for the roof-ceiling combination
shown in Table 5-4b with 3.5 in. of mineral fiber batt insulation (R-15) in
the ceiling space rather than the rigid roof deck insulation.

Added by Clifford J.

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