Energy saving potential of various roof technologies
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2010.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2010
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| Online Access: | http://hdl.handle.net/1721.1/57790 |
| _version_ | 1811087892487864320 |
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| author | Ray, Stephen D. (Stephen Douglas) |
| author2 | Leon R. Glicksman. |
| author_facet | Leon R. Glicksman. Ray, Stephen D. (Stephen Douglas) |
| author_sort | Ray, Stephen D. (Stephen Douglas) |
| collection | MIT |
| description | Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2010. |
| first_indexed | 2024-09-23T13:53:32Z |
| format | Thesis |
| id | mit-1721.1/57790 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T13:53:32Z |
| publishDate | 2010 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/577902019-04-10T12:41:47Z Energy saving potential of various roof technologies Ray, Stephen D. (Stephen Douglas) Leon R. Glicksman. Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Mechanical Engineering. Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2010. Cataloged from PDF version of thesis. Includes bibliographical references (p. 159-168). Unconventional roof technologies such as cool roofs and green roofs have been shown to reduce building heating and cooling load. Although previous studies suggest potential for energy savings through such technologies, many factors affect potential savings. To further investigate these factors, a tool has been developed to allow architects and designers the ability to quickly assess the energy saving potential of different roof technologies and roof constructions for various sites around the world. A first principles heat transfer model is developed for each of the roof technologies, with particular care for green roof heat and mass transfer. Two sets of experimental data from Japan and Florida validate the models by predicting roof surface temperature. The predicted roof surface temperatures in Japan agree with measured values within 10 and 26% of peak roof temperature fluctuations for the cool and green roof respectively, while the same models in Florida agree with measured values there within 7.2 and 14% for the cool and green roof respectively. The models have been integrated into a free online building simulation tool, MIT's Design Advisor, available at http : //designadvisor.mit.edu. Numerous simulations are run, showing that potential energy savings are found to strongly vary with many parameters, particularly roof type, climate, and amount of insulation. For example, a one-story building in Boston with an uninsulated modified-bitumen roof can save 82% in cooling and heating energy by adding 3 m 2K/W of roof insulation, whereas only 34% if an uninsulated green roof is installed instead. However, in Lisbon, the same addition of roof insulation to the same building results in 54% savings, while the installation of an uninsulated green roof results in a 67% reduction. Such findings and their implications are discussed for other locations and design parameters. by Stephen Douglas Ray. S.M. 2010-08-31T14:43:49Z 2010-08-31T14:43:49Z 2010 2010 Thesis http://hdl.handle.net/1721.1/57790 650086010 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 168 p. application/pdf Massachusetts Institute of Technology |
| spellingShingle | Mechanical Engineering. Ray, Stephen D. (Stephen Douglas) Energy saving potential of various roof technologies |
| title | Energy saving potential of various roof technologies |
| title_full | Energy saving potential of various roof technologies |
| title_fullStr | Energy saving potential of various roof technologies |
| title_full_unstemmed | Energy saving potential of various roof technologies |
| title_short | Energy saving potential of various roof technologies |
| title_sort | energy saving potential of various roof technologies |
| topic | Mechanical Engineering. |
| url | http://hdl.handle.net/1721.1/57790 |
| work_keys_str_mv | AT raystephendstephendouglas energysavingpotentialofvariousrooftechnologies |