OIt is required to air condition a factory building (27mx 18mx4m). The 27m wall is type B and faces south. The following data is available: Two glass windows in south wall 3mx 1.5m each with internal shade, lighting load is 20 Watt fluorescent per m² floor area. The inside air conditions are: 24°C DBT and 50% RH. The outside air conditions are: 40°C DBT, DR=18.0°C and 30°C WBT. Other related data are: Uwall=1.4 W/m² K, Uglass 3.5 W/m² K, Scglass-0.7, occupancy=8 persons doing light bench work and CLF occupancy=0.85. The building is of heavy construction with light color located at 40°N. Calculate the building cooling load from the South wall, windows, lighting and occupancy on August at 4:00 p.m.

OIt is required to air condition a factory building (27mx 18mx4m). The 27m wall is type B and faces south. The following data is available: Two glass windows in south wall 3mx 1.5m each with internal shade, lighting load is 20 Watt fluorescent per m² floor area. The inside air conditions are: 24°C DBT and 50% RH. The outside air conditions are: 40°C DBT, DR=18.0°C and 30°C WBT. Other related data are: Uwall=1.4 W/m² K, Uglass 3.5 W/m² K, Scglass-0.7, occupancy=8 persons doing light bench work and CLF occupancy=0.85. The building is of heavy construction with light color located at 40°N. Calculate the building cooling load from the South wall, windows, lighting and occupancy on August at 4:00 p.m.

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

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter5: Analysis Of Convection Heat Transfer

Section: Chapter Questions

Problem 5.12P

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It is required to air condition a factory building (27m x 18m x 4m). The 27m wall is type B and facessouth. The following date is available: Two glass windows in south wall 3m x 1.5m each with internalshade, Lighting load is 20 Watt fluorescent per m2 floor area ; The inside air conditions are, DBT=24 oCand RH=50%. The outside air conditions are, DBT= 40 oC, WBT=30 oC. Other related data are: dailyRange (DR)=18.0 oC, Uwall =1.4 W/m2 k, Uglass=3.5 W/m2 k, Scglass =0.7, occupancy = 8 persons doing lightbench work and, CLFoccupancy= 0.75. The building is of heavy construction with light color located at 32 N.Calculate the building cooling load from the south wall, windows, lighting and occupancy on August at4.0 p.m.
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