Light-managing nanomaterials for energy efficiency
Abstract/Contents
- Abstract
- Sustainable energy is the most important goal for humans in 21st century. While energy is an indispensable factor for our prosperity, the huge demand for energy has also produced excessive greenhouse gas emission, causing global warming and extreme climate change. Therefore, it is crucial to develop sustainable energy to leave a better living environment for the next generation. Energy efficiency, which means to reduce the consumption of energy while maintaining the same life quality, is especially promising due to the quick turnaround and cost-effectiveness. Among all the energy end-use, indoor space heating and cooling contribute to up to 30%. In my PhD study, I explored several nanomaterials that can selectively control the passage of light and electrons to provide energy efficiency solutions for indoor temperature control. In the first part, I will introduce the concept of personal thermal management, which focuses on controlling the temperature around human bodies rather than the entire space. Considering the huge thermal mass of the entire building as compared to the occupants, personal thermal management will have considerable energy saving without sacrificing thermal comfort. My approach is to fabricate light-managing nanomaterials for indoor cloths which is ultra-warm/ultra-cool, so the occupants can feel comfortable even when the indoor temperature is low/high. Chapter 2 describes metallic nanowires coating for textile to enhance the radiation reflectivity and trap the human body infrared radiation (IR) and keep warm. Chapter 3 demonstrates using nanoporous polyethylene (nanoPE) as the textile material which is transparent in infrared and yet remains opaque in visible light. Traditional textile materials are all IR-opaque, so this extra IR-transparency of nanoPE will enhance the radiation heat transfer to the ambience and thus promote human body heat dissipation. Since 50% of human body dissipation is from radiation, this is proven to be very effective to expand the indoor temperature setpoint range by a few Celsius degrees, which should results in 10~30% of energy saving. The second part describes my work on metallic nanowire transparent electrode and electrochromic windows. Electrochromic windows are capable of controlling solar heat input to reduce the dependence on indoor heater or air conditioner, and transparent electrodes directly influences their performance. I will introduce the superior electrical and optical performance metallic nanowire transparent electrode by engineering the wire dimensions, junction resistance, and how to passivate the metal surface. High performance metallic nanowires transparent electrodes will improve the electrochromic windows switching speed, bendability, and cycle life.
Description
| Type of resource | text |
|---|---|
| Form | electronic; electronic resource; remote |
| Extent | 1 online resource. |
| Publication date | 2016 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Associated with | Hsu, Po-Chun |
|---|---|
| Associated with | Stanford University, Department of Materials Science and Engineering. |
| Primary advisor | Cui, Yi, 1976- |
| Thesis advisor | Cui, Yi, 1976- |
| Thesis advisor | Brongersma, Mark L |
| Thesis advisor | Fan, Shanhui, 1972- |
| Advisor | Brongersma, Mark L |
| Advisor | Fan, Shanhui, 1972- |
Subjects
| Genre | Theses |
|---|
Bibliographic information
| Statement of responsibility | Po-Chun Hsu. |
|---|---|
| Note | Submitted to the Department of Materials Science and Engineering. |
| Thesis | Thesis (Ph.D.)--Stanford University, 2016. |
| Location | electronic resource |
Access conditions
- Copyright
- © 2016 by Po-Chun Hsu
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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