calculate the heat loss through the ceiling, if the R-19 insulation batt is replaced by R-40 fiberglass insulation.
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calculate the heat loss through the ceiling, if the R-19 insulation batt is replaced by R-40 fiberglass insulation.
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- Assume an inside room temperature of 70°F and an attic air temperature of 15°F, with an exposed area of 885 ft2. Calculate the heat loss (in Btu/h) through the ceiling if the R-19 insulation batt is replaced by R-35 fiberglass insulation.A 1,065 ft², 7 in. thick concrete wall has inside and outside surface temperatures of 25°C and 9°C. A 2 in. insulation batt with a thermal conductivity of k = 0.03 Btu/(h· ft· °F) is added to the wall. Determine the reduction in heat transfer rate. What is the thickness of the insulation in meters? m What is the thermal conductivity value of the insulation batt in W/(m .K)? W/(mK) What is the R-value of the concrete wall (in m². K/W)? m². K/W What is the R-value of the insulation batt (in m². K/W)? m². K/W What is the heat transfer rate (in W) when the insulation is added? W What is the percent reduction in the heat transfer rate? %Urgent..... Classify the following materials with regard to their thermal insulation properties, rate them from the best to the worst: Solid concrete block, Burned clay block, clay brick. Cement - sand bricks, light weight blocks, and hollow concrete blocks.
- Calculate the decrease in heat loss in kilowatt-hours per day when a 1.2 m x 2.1 m uncoated single-pane window is replaced with a double-glazed window with a low-e coating and argon fill (a relatively common configuration for current win- dows). The inside temperature is a constant 20°C, and the outside temperature is a constant -5°C.The duct shown must be wrapped with insulation. The width of the insulationis designed to wrap completely around the duct. Find in feet and inches thelength of insulation needed to complete the job.why jacketed pipe insulation use for noise reduction
- A well-mixed, insulated water storage tank is to be maintained at internal temperature 60°C. The environmental temperature around the tank varies from -25°C to 30°C. The tank's exterior surfaces (total = 125 m²) have four different levels of insulation as indicated in the table. Surface Component Area, Effective RSI, 2 m² 2 m². °C/W Surface A 60.0 Surface B 30.0 Surface C 30.0 Surface D 5.0 Say that just one surface can be selected to have its insulation upgraded such that its effective RSI would be doubled. Which should be selected to achieve the greatest reduction in heat loss? 10.0 15.0 4.0 0.5Parker County Community College (PCCC) is trying to determine whether to use no insulation or to use insulation that is either 1 inch thick or 2 inches thick on its steam pipes. The heat loss from the pipes without insulation is expected to cost $1.50 per year per foot of pipe. A 1-inch thick insulated covering will eliminate 89% of the loss and will cost $0.40 per foot. A 2-inch thick insulated covering will eliminate 92% of the loss and will cost $0.85 per foot. PCCC Physical Plant Services estimates that there are 250,000 feet of steam pipe on campus. The PCCC Accounting Office requires a 10%/year return to justify capital expenditures. The insulation has a life expectancy of 10 years. Determine which insulation (if any) should be purchased using a ranking future worth analysis.The insulation to be used in a certain slot is as follows: fish paper 3/64 inch, Tufflex 3/32 inch, varniches cambric 3/64 inch, and top stick 1/8 inch. What is the total thickness of the insulation?
- An insulated steam pipe having outside diameter of 3 cm is to be covered with two layers of insulation each having a thickness of 2.5 cm. the thermal conductivity of one material is 5 times that of the other assuming that the steam pipe surface temperature and outer air temperature remain fixed . how much change in heat transfer take place if the better insulating material is next to the pipe than it is on outer side?A concrete wall has a thermal resistance of 0.095 K/W. There is a glass window in the concrete wall with a thermal resistance of 0.046 K/W. What is the total thermal resistance for the whole configuration (wall+ window) (K/W)? O A. 0.1410 B. 32.2654 C. 0.6738 OD. 0.0310 OE. None of them.Q- To complement the construction Q- What is the correct Sentence of a wall or to connect a wall to be scientifically? constructed with a previously Thermal insulation value of brick constructed wall specially If the wall units wall was a measure of the is to be connected vertically when capacity of the wall to retention heat between inside and outside the building and the greater the value of the coefficient the lower O Non of them the amount of heat leaking. The previously built wall each brick is left on the head so that it will Thermal transmittance coefficient of brick units wall was a measure of down away from the face of the wall about quarter brick and this works the ability of the wall to escape heat between inside and outside the done between row and row. building and the greater the value of It is left without completion, and each row is an apostate from the row under of it about a quarter or the coefficient the lower the amount of heat leaking. O All answers corrected half…