5.1 The stairwell of a tall building is 30 m high. The temperature inside is 20°C and thetemperature outside is 0°C. The door at floor level is open with dimensions 1 m wide and2 m high. Assume a flow coefficient C = 0.7.(a) Estimate the pressure difference at the top of the building.(b) At the ceiling an opening is provided with the same dimensions as the door. Estimatethe mass flow rate of air through the building.Suggested answer: (a) AP,26 Pa; (b) m = 7.8 kg/smax5.2 An enclosure has openings at the bottom and at the top, as shown in the figure below.The height from the floor to the neutral plane is h, and from the neutral plane to theceiling h,. The temperatures inside and outside are T, and T, respectively. Show thathA,= Kh,and give an expression for K.A2TgHNA,5.3 A large enclosure has geometric dimensions indicated by the figure below. The temperaturein the room is 400 K above ambient temperature. A, = A2 = 6 m².(a) Set up equations for calculation of the height of the neutral plane, taking into accountthat the pressure difference varies over the height of the openings. Calculate theheight of the neutral plane.(b) Calculate the height of the neutral plane, but now assume that the pressure differenceacross each opening is constant over the opening height, evaluated at the center ofeach opening.

a, pressure difference? b, mass flow rate of air?

Answered: Estimate the pressure difference at the…

Estimate the pressure difference at the top of the building. At the ceiling an opening is provided with the same dimensions as the door. Estimate the mass flow rate of air through the building.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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