{ "cells": [ { "cell_type": "markdown", "metadata": { "slideshow": { "slide_type": "slide" } }, "source": [ "# Glass" ] }, { "cell_type": "markdown", "metadata": { "slideshow": { "slide_type": "-" } }, "source": [ "
" ] }, { "cell_type": "markdown", "metadata": { "slideshow": { "slide_type": "slide" } }, "source": [ "## Introduction" ] }, { "cell_type": "markdown", "metadata": { "slideshow": { "slide_type": "-" } }, "source": [ "\n", "" ] }, { "cell_type": "markdown", "metadata": { "slideshow": { "slide_type": "-" } }, "source": [ "[Videos from Corning](https://www.youtube.com/watch?v=12OSBJwogFc&list=PLPyDedUeJZL58O8OM2PyWKeQXc6vIlQb4&index=4)\n", "\n", "The videos from corning form a really good introduction to the topic of glass so I strongly encourage you to watch them. One more thing, the Glass Association of North America ([GANA](http://www.glasswebsite.com/)) is the glass equivalent to ACI for concrete. GANA publishes the manuals that contain the mechanical properties for glass.\n", "\n", "[3D glass printing](http://www.technologyreview.com/news/540926/3-d-printing-breaks-the-glass-barrier/)" ] }, { "cell_type": "markdown", "metadata": { "slideshow": { "slide_type": "slide" } }, "source": [ "## Sustainability" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "\n", "" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ " \n", "In order to make glass sustainability all that needs to be done is to recycle it. Many advances have come along in the glass industry have increased the popularity of [insulated](https://en.wikipedia.org/wiki/Insulated_glazing) and [low-e](https://en.wikipedia.org/wiki/Low_emissivity) windows. Insulated windows have been around since before the 1930s in one form or another, though they did not start becoming popular until around the 1950s. The way these windows work is that there are two layers of glass (or lights) separated by a layer of gas. Since the internal gas is confined between the two panes it moves very slowly, if at all. This greatly reduces the heat transfer from one pane to the other by convection. Gases are made up of widely spaced atoms which reduces the ability of heat to be transfered via conduction. This means that heat transfer by radiation becomes a mush more dominant form of loss. This is where low-e glass comes in.\n", "\n", "Low-e stands for low emissivity, which means the glass radiates energy less. Emissivity is measured relative to a [blackbody](https://en.wikipedia.org/wiki/Black_body) (a perfect emitter). The reason for this is that a the amount of radiation energy an object will emit is identical to the amount of energy that an object will absorb at a particular temperature and wavelength. Just think about walking on hot asphalt in the summer and you'll get the idea.\n", "1-4 | Glass Surfaces |
5 | Window Frame |
6 | Spacer |
7 | Seals |
8 | Reveal (Interior Windowsill) |
9 | Windowsill |