HW-5+ENVIRONMENTAL - EMA 4125 HW-5 Sustainability and...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
EMA 4125 – HW -5: Sustainability and Contemporary Issues The incandescent lamp has been the main source of lighting for nearly a century. It is currently being phased out by a more efficient lighting solutions. (a) Discuss the environmental/global/societal impact of using the incandescent lamp and its replacement using the compact fluorescent lamp (CFL). Your answer should address energy sustainability, global warming, climate change, and /or environmental challenges . What are the environmental issues associated with CFL technology. (b) If a 100 W incandescent lamp has a illumination efficiency of 5% and reaches a maximum temperature of 3500 K. Calculate the area of the filament. Assume radiation losses only with emissivity of 0.5. (c) Schematically sketch of wavelengths of light emission. How would you estimate the percentage of the light that falls into the IR portion of the spectrum. (d) Compare and contrast (using schematic diagram) the heat transfer loss mechanisms between an incandescent lamp and CFL.
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern