Find Physics Principles And Problems at Amazon
|
This is part 2 of a continuance from Your Solar Screens aren’t working properly: Previously we discussed that your solar screen may not be functioning the right way and if you want to have the most energy effective product installed on your windows it is necessary to comprehend 3 basic principles of physics. Here they are. 1, Heat always seeks a colder atmosphere. This is evidenced by placing a room temperature spoon in a hot cup of coffee. We all know what happens next. The spoon gets warm and where did that heat come from? The heat from the hot cup of coffee sought and found the cooler atmosphere of the metal spoon. Solarhade screens block, reflect, and absorb heat from the sun and ambient air. This includes the shade cloth and the frames keeping the shade cloth. Now the heat is looking for a cooler place to move to. Typically it will be the surrounding ambient air which is cooler than the solar screen and frame. In the case of the shade cloth, assuming the cloth is ¾” – 1″ off the glass, the heat dissipates and is assisted through air flow in and out of the open portions of the mesh. The frames are specifically installed directly versus the window frame and the heat from the frames transfers into the window frame. Therefore, the most effective place to position the solar screen is on the exterior and ¾” to 1″ off the glass. Ideally, the solar screen frames ought to be separated from the window frame to eliminate this heat also. If you position the solar screen on the interior, it absorbs heat and transfers it into the interior surroundings to invent an uncomfortable space. 2, Dark colored objects absorb more heat than light colored objects. Do you do not forget back in the primary grade when our science studies taught us this principle. What we did was to take two metal trash may lids and paint one white, the other black. We placed them out in the sun for a couple of hours and then went outside to physically check the temperatures. A simple touch of the hand to the lids evidenced that the black trash may lid was much hotter than the white lid. Another good example of this is the comparison amidst a white painted car vs. a black painted car. You likewise have the greenhouse effect but that is another discussion. On the exterior, a darker color is better for solar shade screen products. A dark solar screen will absorb more heat. On the interior, a light colored solar screen is a better choice. A light colored solar screen will reflect a great deal of heat and absorb less heat on the interior. So, if you must install interior, light color is the way to go but it is still not as effective as going on the exterior. 3. Heat always seeks the path of least resistance. When your solar screen absorbs heat like it is designed to do, that heat will have to be dissipated into the atmosphere. If your screen is too close to the window glass, or touching the glass, that heat will transfer directly into the glass and into the living space. It’s just requiring little effort for heat to do that in particular since you are quintessentially attempting to keep the interior cooler than the exterior. This is a actually overlooked principle and I at times wonder if it is not purposely overlooked by manufacturers so they don’t have to consider this in their solar heat gain figures. I have even seen tests designed to take vantage of this fact and totally mislead the customer, but that is another solar screen training for another day. Suffice it to say a solar screen will do the job. By the right way installing a solar screen you eliminate this problem. In conclusion, installing a solarshading screen you will keep the heat off the glass to get started with. With a little spacing of the screen from the glass the heat will be dissipated into the atmosphere rather than transposed through the glass. And, by shading the entire window, frame included, the transfer of heat through the window frame is minimized. |
