Q2. Compute the total heat gain load from all the sources into a residence spaceof 25*20*10 height,if the space is located at the top floor of an airconditioned commercial building. The residence space has one exposed wallfacing South.-Wall facing S, (25* 10); 12" brick on the outside, (the overall heattransmission value(U) is 0.25 Btu/hr.ft². "F).-Roof; 4 concrete with 2" insulation, Uroof 0.35 Btu/hr.ft.F- Windows facing S ;No.(2), (3*3),single regular plate,double-hungmetal windows,weather-stripped; unlocked ,shaded with cream insideroller shade,fully drawn.-Occupants: (5) persons; moderately -active office work.-Lightening :2.5 kW-Equipments: No. (1) ; domestic gas oven.-Outside conditions:T-85 F (db) &T-70 F (wb), DR-25 F, Vwind=10mph.-Inside conditions : T-65 F (db) & 0-50%-Location: 30 N.L, Time=2 P.M. P9.The forward transfer function of a unity feedback type1, the second-order system, has a pole at (-2). Thenature of gain K is so adjusted that the damping ratiois equal to 0.4, the input to the system is r(t) = 1+4tfind ess.

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Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

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Chapter5: Analysis Of Convection Heat Transfer

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