A-For a general office room, the exposed wall (with a window, outside winter type)construction is 19 mm plaster outside (cement and sand) and 20 cm brick (building). Thearea of the window is 50% of the exposed wall. Calculate the heating load required for theoffice caused by the wall and window. Take Tout-5 °C and Tin-25 °C, exposed wallheight=3 m and width=5 m, Inside and outside still air thermal resistance fi= 9.37 W/m²°Cand fo= 34.1 W/m2 °C respectively.(6 marks)

Answered: Image /qna-images/answer/318a1026-8dfa-4535-aa0e-8fe16af21dfc.jpg

Answered: A-For a general office room, the…

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

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1) A wall section composed from the outside to inside, of concrete brick 100mm thick, an air space of 50mm, two layers of fiberglass insulation 38mm thick, concrete block 150mm thick and air space of 19mm and a gypsum board of 13mm. The exterior conditions are -20C and RH=90% while the interior conditions are 23C and RH=40%. The surface temperature from the outside to inside are shown in the figure. The permeances are: Still Air: µ = 175 ng/pa.s.m Fiber glass: M=2560 ng/pa.s.m? Concrete block: M= 200 ng/pa.s.m? Gypsum board: M= 2000 ng/pa.s.m? Concrete brick: µ = 4.55 ng/pa.s.m Determine if there is a risk of condensation, and if there is, what is the condensation rate? What would happen if a vapor barrier (M=0.2 ng/pa.s.m²) was installed on the warm side of the insulation (Surface 4). 21с 19C 16 С 12C -10 -15C -18C -19C Gyp Air Concrete Fiber Fiber Air Concrete Outdoor Indoor sum block Glass Glass brick 230 19 50 mm -20C 13 150 mm 38 mm | 38 mm 100 mm RH=90% RH=40% mm mm Surf. 1 Surf.…

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