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DIGITAL TREE SIMULATION FOR RESIDENTIAL BUILDING ENERGY SAVINGS:
SHADING AND EVAPOTRANSPIRATION
by
Yi-Lun Cheng
A Thesis Presented to the
FACULTY OF THE USC SCHOOL OF ARCHITECTURE
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
MASTER OF BUILDING SCIENCE
August 2012
Copyright 2012 Yi-Lun Cheng
Object Description
| Title | Digital tree simulation for residential building energy savings: shading and evapotranspiration |
| Author | Cheng, Yi-Lun |
| Author email | yilunc@gmail.com;yilunc@gmail.com |
| Degree | Master of Building Science |
| Document type | Thesis |
| Degree program | Building Science |
| School | School of Architecture |
| Date defended/completed | 2012-07-02 |
| Date submitted | 2012-07-30 |
| Date approved | 2012-07-31 |
| Restricted until | 2012-07-31 |
| Date published | 2012-07-31 |
| Advisor (committee chair) | Kensek, Karen |
| Advisor (committee member) |
Schiler, Marc Carlson, Anders |
| Abstract | Landscaping in general and trees specifically can be beneficial in helping to mitigate several environment problems such as carbon sequestration, urban hear island, reduced air quality due to pollution, and erosion. Yet simulation software programs are often weak in enabling designers to understand analytically and to specifically predict energy savings through the use of landscaping. ❧ The assessment done on existing energy simulation software shows that several programs could not model trees directly. Previous studies have looked at the effect of shade trees on energy use. Different strategies were used to try to model trees in these software programs, and simple case studies were undertaken to verify the results. Two critical potential energy saving features of trees were studied: direct shading on a wall and/or window and evapotranspiration. Shade trees can help in reducing solar gain and thus reduce energy consumption for cooling and should be taken seriously as a climate change adaptation initiative. ❧ The evapotranspiration of shade trees can also change both air temperature and relative humidity in the micro-climate. The evapotranspiration impact of trees has been simulated in DOE-2; the ambient temperatures were changed to estimate the indirect cooling effects of trees in reducing air-conditioning energy use. This methodology was cumbersome. In addition, several of the other software programs could not simulate this effect directly. Different methods had to be employed to achieve this capability. ❧ The final results show the limitations in simulation in practice. Unfortunately, the current energy simulation programs do not have the capability to simulate the tree’s effect on building energy usage. For shading, the proposed methodology can benefit in developing integrated tools for simulating the shading effects although there are still many issues unsolved. And there is a need to incorporate evapotranspiration. As a holistic building design tool, the direct and indirect effects of tree should be considered. |
| Keyword | energy simulation; landscape; tree; energy saving; shading; evapotranspiration; building shade; foliage; eQuest; DOE-2 |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Provenance | Electronically uploaded by the author |
| Type | texts |
| Legacy record ID | usctheses-m |
| Rights | Cheng, Yi-Lun |
| Access conditions | The author retains rights to his/her dissertation, thesis or other graduate work according to U.S. copyright law. Electronic access is being provided by the USC Libraries in agreement with the author, as the original true and official version of the work, but does not grant the reader permission to use the work if the desired use is covered by copyright. It is the author, as rights holder, who must provide use permission if such use is covered by copyright. The original signature page accompanying the original submission of the work to the USC Libraries is retained by the USC Libraries and a copy of it may be obtained by authorized requesters contacting the repository e-mail address given. |
| Repository name | University of Southern California Digital Library |
| Repository address | USC Digital Library, University of Southern California, University Park Campus MC 7002, 106 University Village, Los Angeles, California 90089-7002, USA |
| Repository email | cisadmin@usc.edu |
| Archival file | uscthesesreloadpub_Volume4/etd-ChengYiLun-1073.pdf |
Description
| Title | Page 1 |
| Full text | DIGITAL TREE SIMULATION FOR RESIDENTIAL BUILDING ENERGY SAVINGS: SHADING AND EVAPOTRANSPIRATION by Yi-Lun Cheng A Thesis Presented to the FACULTY OF THE USC SCHOOL OF ARCHITECTURE UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree MASTER OF BUILDING SCIENCE August 2012 Copyright 2012 Yi-Lun Cheng |
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