9:87A moodle.nct.edu.omA picture window has dimensions of 1.05 mby 2.5 m and is made of glass 7.5 mm thick.On a winter day, the outside temperature is25.5° C while the inside temperature is acomfortable at 16° C. (k of glass=0.095W/m.K) ((a*1.5)+(b*1.5)+(c*2.0) =5marks)Calculate the following:a) the area of the window in squaremetresb) the temperature gradient (AT/Ax)inkelvin/metreb) the rate of heat lost through thewindow by conduction inwatts/metre.kelvinII

Now determine the area of glass.

A picture window has dimensions of 1.05 m by 2.5 m and is made of glass 7.5 mm thick. On a winter day, the outside temperature is 25.5° C while the inside temperature is a comfortable at 16° C. (k of glass =0.095W/m.K) ((a*1.5)+(b*1.5)+(c*2.0) = 5marks)

A picture window has dimensions of 1.05 m by 2.5 m and is made of glass 7.5 mm thick. On a winter day, the outside temperature is 25.5° C while the inside temperature is a comfortable at 16° C. (k of glass =0.095W/m.K) ((a1.5)+(b1.5)+(c*2.0) = 5marks)

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

Please help me fast.
1
Insulating material is used to reduce heat loss from the heating furnace walls to the room. The surface temperature of the insulating material is 100 ° C and the other surfaces 20 ° C. Allowable heat loss up to 140 W / m2 from the wall. If the thermal conductivity of the insulation material is 0.05 W / (m ° C), calculate the required thickness of insulation. insulation thickness = Answer cm
The thermal conductivity of a substance may be defined as the rate of heat transfer per unit length per unit temperature difference. The primary dimensions of thermal conductivity are (a) m2·L/t2·T (b) m2·L2/t·T (c) L2/m·t2·T (d ) m·L/t3·T (e) m·L2/t3·T
Temperature differences for Thermal efficiencies do not have to be converted to absolute temperature. true or false?
Give the following problem a try. If you get stuck, here is one way to work it: Essential Solution Video. An airplane has a half-wingspan of 31 m. Determine the change in length of the aluminum alloy [a = 24.0 × 10-6/°C] wing spar if the plane leaves the ground at a temperature of 17°C and climbs to an altitude where the temperature is -51°C. Answer: 6 = i mm
2. Calculate Passive House's energy demand. a, Calculate window U-value based on given data in figure. 0.117m 0.117m 0.134m C₂ Utotal Wglass-0.996m = 1.229m glass Uglass = 0.6- glass W window - 123m W m².c 0.117m 1.48m nwindow W m² °C Uframe = 1.6- Area₁ U₁ + Area2 U₂... + Area, * U₁ Area total b. With the calculated U value for the windows find out how much power needed to maintain 20°C in a home with outside of 0°C based on the following: the house having a square footprint 17 m by 17 m, walls 2.5 m high (Uwalls = 0.152 each of the four walls hosting two windows, and each window having an area of 2 m². The entry door area is 2.5 m² (Udoor = 0.65- ). What are the heat loss rates for the installed windows, the door, the walls, the ceiling, and the floor? What is the overall heat loss rate of the home? m². C 1. What do these calculated heat loss rate values mean? 2. What is the definition of the passive house? 3. What does the U-value represent? Use its unit as a hint and describe it…
An office space of 14 ft x114 ft x12 ft height. The heat loss through roof is (5131.3 Btuh) if Tb.l.=70 F, To= 5 F , and Uwall=0.35 Btu/hr.ft2.F * O True O False
Find the thermal resistance r (in hr - °F/BTU) and the equivalent R-value (in hr ft?. °F/BTU) of a typical frame 20' x 7.5" wall consisting of a 0.5" plaster board on the inside of the room, nominai 2 x 4 studs, and a 0.5" sheathing on the outside. The spaces between the studs are filled with an R-15 insulating foam. What is the heat loss (in BTU) through this wall in four hours if the inside temperature is 72°F and the outside temperature is 32°F? (Assume that the 15% of the wall's area are studs and the remaining 85% is filled with the insulating foam. Assume that the air is moving outside the wall.) r= 0.0805 x hr: OF/BTU R=0.09 x hr ft2. F/BTU AQ = BTU
Required information Sometimes equations can be developed and practical problems solved by knowing nothing more than the dimensions of the key parameters. For example, consider the heat loss through a window in a building. Window efficiency is rated in terms of R value, which has the unit of ft2-hr-°F/Btu. A certain manufacturer offers a double-pane window with R = 2.5 and also a triple-pane window with R= 3.4. Both windows are 3.5 ft by 5 ft. On a given winter day, the temperature difference between the inside and outside is 45°F. How much heat is lost through the double-pane window? 315 Btu Return to question
2 parts ( A&B) Read and solve carefully please write clearly and box the final answer(s) label them Hint: Pay attention to numbers bolded
1-) Die casting is a metal casting process that is characterized by forcing molten metal under high pressure into a mould cavity. A circular die (k = 150 W/mK, T = 125 °C) is used to drill a hole (D = 0.5 m) along length L = 3 m through a cylindrical metal (D = 2 m) as shown in the figure. A cooling fluid (k = 0.6 W/mK) passes through the hole during the process to keep the inner surface temperature of the hole to 85 °C. In the meantime, the outer surface temperature of the cylinder is held at 30 °C. The hole is drilled eccentrically (not in the origin of the cylinder, 0.1 m perpendicular distance) as shown in the figure. If the heat loss through the cylinder is XY kW during this process, what is the thermal conductivity of the cylindrical metal? (Take the heat loss value XY as a 49 2m 0.1m %3D 3m