Cogon Grass as Thermal Insulator
Cogon Grass as Thermal Insulator
COGON GRASS AS THERMAL INSULATING MATERIAL
KRISELLE ANNE A. GERPACIO
A Thesis Outline Submitted to the Department of Civil Engineering, College of
Engineering and Computing, University of Southern Mindanao,
Kabacan, Cotabato in Partial Fulfillment of the
Requirements for the Degree of
BACHELOR OF SCIENCE IN CIVIL ENGINEERING
Significance of the Study
Cogon grass known as Imperata cylindrical is considered as the one of the worst weed because it destroys the land where it grows. It deteriorates the nutrients of the soil thus creating problems to farmers. ...view middle of the document...
The sample material will be taken from anywhere. The laboratory test will be replicated thrice at the same temperature, time, and place, and the researcher will...
by Chris Woodford. Last updated: April 25, 2016.
If you're out and about in winter and you're feeling cold, chances are you'll put on a hat or another layer of clothing. If you're sitting at home watching television and the same thought strikes you, you're more likely to turn on your heating. Now what if we switched the logic around? What if you ate more food whenever you felt cold and stuck a woolly hat on top of your house each winter? The first wouldn't make much difference: food supplies the energy your body needs, but it doesn't necessarily make you any warmer right there and then. But putting "clothes" on your house—by insulating it—is actually a very good idea: the more heat insulation you have, the less energy escapes, the lower your fuel bills, and the more you help the planet in the fight against global warming. Let's take a closer look!
Photo: Aerogel is one of the world's newest and most exciting insulating materials. Put a slab of aerogel between a gas flame and some wax crayons and the crayons won't melt: the aerogel stops virtually any heat flowing through. One day, we could make all our windows out of aerogel—but scientists have to figure out how to make it transparent first! Photo by courtesy of NASA Jet Propulsion Laboratory (JPL).
How does heat escape from your home?
Why does heat escape from your home in the first place? To understand that, it helps to know a little bit about the science of heat. As you probably know, heat travels in three different ways by processes called conduction, convection, and radiation. (If you're not sure of the difference, take a look at our main article on heat for a quick recap.) Knowing about these three types of heat flow, it's easy to see lots of ways in which your cozy warm home is leaking heat to the freezing cold world all around it:
1. Your house is standing on cold soil or rock, so heat flows down directly into the Earth by conduction.
2. Heat travels by conduction through the solid walls and roof of your home. On the outside, the outer walls and the roof tiles are hotter than the atmosphere around them, so the cold air near to them heats up and flows away by convection.
3. Your house may seem like a big complex space with lots going on inside in but, from the point of view of physics, it's exactly the same as a camp fire in the middle of vast, cold surroundings: it constantly radiates heat into the atmosphere.
Artwork: Where does the heat escape in a typical home? It varies from building to building, but these are some rough, typical estimates. The walls give the biggest heat loss, followed by the doors and windows, the roof, and the floor.
The more heat escapes from your home, the colder it gets inside, so the more you have to use your heating and the more it...