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Energy Efficiency in a House
Transcript of Energy Efficiency in a House
So lets make them energy efficient!!! To find out how to make your house more energy efficient, you have to know what makes it not energy efficient Lets look at a non-energy efficient house. 42% of your energy efficiency is lost through the ceiling 10% is lost through the floor 12% is lost through the chimneys and droughts around doors and windows 12 % of energy efficiency is lost through the windows 24% of energy efficiency is lost through the walls Most of these problems are caused by bad insulation in the walls, ceilings, etc. Lets talk about 3 types of insulation
-Spray on foam sealing
-Fiber Insulation Spray on Foam Sealing This method of insulation is getting more popular in modern houses. The foam is made of polyurethane. Spray on foam gets rid of nearly all the leaks in your walls that could cost you a ton of money by spraying on a sealant foam that blocks nearly all heat from escaping the house. Thermal Shield Insulation Another alternative for insulation is the thermal shield insulation. This type of insulation is a lot like tin foil. It reflects escaping heat back into the room instead of letting it escape. This type of insulation is generally made up of fiberglass, sheep wool, and some other materials. Fibre Insulation is usually rolled on to the attic to prevent heat from escaping the house and causing energy loss. This insulation is measured in R value. The higher the R value the more heat it will prevent from escaping the house therefore the better it will be. Fibre Insulation All these insulation types are a good way to keep excess heat from escaping the house, but that's not the only step to making your house energy efficient! Energy Efficient Window Films 25% of a home's cooling energy is lost through you windows during winter and 60% in the summer. A way to get around these energy losses is to get window films. These films are like a thin membrane covering the windows. They prevent 98% of harmful ultraviolet lights to enter the house and they allow 80% of all visible lights to pass through. Leaky Air Vents A major part of loss of energy efficiency is due to leaks in the air vents. This can cause the loss of heated air through the air vents making your air conditioning systems use more energy in the house than needed. Fixing the leak may cost a lot of money, but it'll save you money in the long term. Energy Independence To make your house cost the least, you are going to have to make your house energy independent. This can save you all the money you spend on energy bills, so you can finally say goodbye to those annoying energy bills. :D One Way to make your energy dependent is with solar panels. Solar Panels Now we all know that solar panels are what modern day environmentalists call green energy, but lets take a closer look at what their made of. Solar Panel Layers Protective Glass Covering Anti-Reflective Cover Front Cover N-type Silicon P-type Silicon Back Cover Why does a Solar Panel Work Lets take a closer look at a solar panel cell and how they work. Silicon Atom Notice how the silicon atom only has 4 electrons on the outer ring The first two rings of the atom are completely full, but the last ring is only half full. A silicon atom is always look for ways to fill up its last ring. It will "share" electrons from nearby atoms to fill up its last ring. Unlike copper, pure silicon is a poor conductor of electricity. To get around this designers of solar panels will add electrons of atoms that like phosphorous. This is called doping. The silicon that is already doped with phosphorous is called n-type silicon. When energy hits the doped silicon, a few electrons break lose and those electrons carry an electrical charge looking for holes to fill up. There is another layer of doped silicon called P-type silicon. This is doped with the element boron. When doped with silicon boron only has three electrons so when doped with silicon it leaves an open place. The p and the N stand for positive and negitive. When the two are combined, it creates an electrical field. The loose electrons form the n-type silicon go to the p-type silicon layer which have empty spaces to fill up. When the electrons go to the P layer, it causes voltage and that combined with the flow of electrons which causes a current, we get POWER! But we have one more problem... Silicon happens to be a very shiny therefore reflective material. This will result in energy lost because light photons will be reflected. All you need to do is just put an anti reflective surface and voilà, we have a stable energy source. Then of course...There is a protective glass cover on top to protect the panel from the weather. What if the sun isn't shining? One way to get past this situation is to use batteries to store up excess energy of the solar panels make but you don't use. You can use that power your house when there is no sunlight. Another common solution is to live in sunny place. If it's so energy efficient, then why doesn't everyone have them? Total cost to install = 8-10$ PER WATT Lets take a look at how light bulbs could save you energy An Incandescent light bulb, the one you probably have in your house costs 352 dollars to run for 50,000 hours. Considering how much light bulbs you have in your house, it's expensive. A LED light bulb only costs 85.75 dollars to run for 50,000 hours. You Compare! Which is better? If you do all this you, you can cut your energy bill to $0 per month! Energy bill THANKS FOR LISTENING