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Build environment

الكلية كلية الهندسة     القسم  الهندسة البيئية     المرحلة 4
أستاذ المادة احمد طالب صاحب العودة       28/09/2014 06:46:25
Environment and Architecture

Fourth year - 2 hour theory, 1 applied.

We will try to cover the important principles of Environment and Architecture.
At the end of the year , the student s should be able to Identify and enumerate with calculations about:

1. Build environment , 2. Physical environment , 3. Comfort, 4. Light with some of scientific principle , 5. Air quality, Ventilation , 6. Noise , 7. Site planning , 8. Energy sources
9. Construction materials and health , 10. Form , 11. Views , 12. Environmental strategy
13. Urban climate , 14. Sustainable development , 15. Architecture planning

References:

1. Masters, Gilbert M., 2005, “Introduction to Environmental Engineering and Science”, Prentice – Hall of India, New Delhi.
2. Henry, J.Glynn and Gary, W. Heinke, 2009, “Environmental Science and Engineering”, Second Edition, Prentice – Hall of India, New Delhi .
3. Randall, T, 1999, “Environmental Design: an introduction for architects and engineers ”, second edition, E&FN Spon, Great Britain.
4. Sincero, Arcadio P., and Gregoria A. Sincero, 2010, “Environmental Engineering, A design approach”, Prentice – Hall of India, New Delhi.
5. James R. Mihelcic, and Julie Beth Zimmerman,2010, Environmental Engineering: Fundamentals, Sustainability, Design, John Wiley & Sons, lnc., USA.
6. Mackenzie, L. Davis, and Susan J. Masten, 2009, Principles of Environmental Engineering and Science, McGraw-Hill, New York, USA.
7. David Lee Smith, 2011, Environmental Issues for Architecture, John Wiley & Sons, Inc., New Jerscy, USA.





Heat transfer by radiation ( Blackbody )
Every object emits thermal radiation. The usual way to describe how much radiation a real object emits, as well as other characteristics of the wavelengths emitted, is to compare it to a theoretical abstraction called a blackbody. A blackbody is defined to be a perfect emitter as well as a perfect absorber. As a perfect emitter, it radiates more energy per unit of surface area than any real object at the same temperature. As a perfect absorber, it absorbs all radiation that impinges on it; that is, none is reflected and none is transmitted through it. Actual objects do not emit as much radiation as this hypothetical blackbody, but most are quite close to this theoretical limit. The ratio of the amount of radiation an actual object would emit to the amount that a blackbody would emit at the same temperature is known as the emissivity ( ? ). The emissivity of desert sand, dry ground, and most woodlands is estimated to be approximately 0.90, while water, wet sand, and ice all have estimated emissivities of roughly 0.95. A human body, no matter what pigmentation, has an emissivity of around 0.96.


Q: A hot- water radiator has a surface temperature of (80 C?) and a surface area of (2 m2). Treating it as a blackbody, find the net rate at which it will radiate energy to a (20 C? ) room.
Enet = ?? A[(T1)4 –(T2)4] = 5.67×10-8 [(353.15)4 –(293.15)4]= 926.33 W
?max = =

Energy Conservation:
We may note that the effectiveness of insulation is a function of both its conductivity and thickness. The resistance is the reciprocal of the thermal conductivity.


Example: A typical residential construction from the 1950s consisted of the layers shown in the drawing. Estimate the heat loss with the existing insulation scheme and an additional 20 cm of organic bonded-glass fiber insulation, if the indoor temperature is to be maintained at 20 C? and the outdoor temperature is 0 C?.


المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .