DEFINITION
“Isola te gain is the transfer of heat into the space to be heated from a collector that is thermally isolated from the space to be heated by physical separation or insulation (such as an attached sunspace with an insulated commd on wall)”
Sunspaces
Sunspaces or Sunrooms which are similar to solar greenhouses work with the elements of direct gain and indirect gain system features. Sunlight entering the sunroom is kept in the thermal mass and air of the room. Sunlight is brought into the house by way of conduction through a shared mass wall in the rear of the sunroom, or by strategically placed vents that permit the air between the sunroom and living space to be exchanged by convection. The sunspaces is designed to heat tjacent living spache sunspaces as well as the adjac
Convection is the forced movement of air throught a space while conduction is the process of heat transfer through a material.
In the relation to the sunspace, conduction is made by the use of oppenings
There are 3 types of sunspaces, we have the direct gain sunspaces, air exchange subsystem ams well as the thermal wall srorage subsystem
In the direct gain sysyem the open conlazed wall conection between the sunspace and the living space has a glazed shared wall. This wall provides a certain amount of thermal separation allowing the tempratures in the sunspace to fluctuate without affecting the amount of heat loss in the living area .it is still essentially a buffer between the outside and inside air.
The air exchange system has a dark opaque wall which has small operable vents that allow the transfer of heat from the sunspace into the main living space. The closing of these vent act as a buffer zone, which reduce the heat gain through the wal...
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At it is still able to make a cool place to relax during the summer months. The use of doors windows and vents allow the sunspace to cool the house as wel as cool itself. The ed sun that travels thru the windows gets carried out by the vents at the top of the roofas well as the use of cross convection as well as placing openings such as a door or a window opening on the west and east sides of the sunspace. The north- west prevailing wind can ente the space carring off the heated air , the hot air collected can be dispersed through the vent openings
Use of Overhangs allow to enter in the winter but keeps it out in the summer
Summer and winter sun difer in that the sun is higher in the sky during the summer months and lower during the winter months . by the use of eaves we allow all the summer sun to be blocked and therefore shading the sunspace area.
Solar energy is energy taken from the light that reaches earth's surface from the sun. There are four different kinds of solar energy, which are active solar systems, passive solar systems, photovoltaic cells and concentrating power systems. An active solar systems is a system that captures solar energy by mechanical means. Common active solar systems are often in buildings or homes. Some examples are roof collectors and water heating. Low Intensity and high variability have limited the use of active solar energy in Canada. A pass...
Three types of heat transfers help solar cookers use the sun’s energy to cook food. Heat is always transferred from the warmer object to the cooler object. Heat is also transferred to and through some materials better than others. The three types of heat transfers are radiation, conduction, and convection. Convection is the heat transfer by movement through materials such as air or a liquid. Materials like these are called mediums. Convection is the primary way heat can be transferred through liquids and gases. To classify a heat transfer as convection, hot air has to rise up to equally heat the air around it. Box solar cookers have to retain this hot air to cook food, so the cookers have to have lids with a transparent covering. The transparent covering shuts in all of the hot air and keeps out the cool air. The second heat transfer is the transfer of heat between two objects, or substances, that are directly in contact with each other. This heat transfer, called conduction is the primary way heat can be transferred through solids. In gases and liquids, conduction works poorly because the atoms have a great deal of space between them. Since they have a lot of space between each other, they can’t communicate heat to one another. The solid, aluminum foil, is commonly used in homemade solar ovens because it is a metal. It is well known metal is a great conductor of heat. Since metal (aluminum) is a great conductor of heat, whatever comes in contact with it will gradually absorb the heat from the metal. The third type of heat transfer is radiation. Radiation is the transfer of energy (heat) through space by electromagnetic waves. Solar energy reaches Earth by radiation (Pearson 485). When an energy wave comes directly in contact with...
in the same way that a greenhouse does, by trapping heat energy inside the atmosphere. Unfortunately, since the
In passive solar design, the vertical and horizontal surfaces control the heat transfer; in winters collect and distribute solar heat and dissipate heat in summer. Passive solar techniques utilize solar energy through direct or indirect solar gain to achieve environmental comfort in the building. The key factors in passive solar building design are: site planning and design; thermal mass; solar geometry; ventilation and vegetation.
absorb the energy from the sun, but it does absorb some of the heat energy
Sunspots are the most apparent features on the Sun’s surface or photosphere. Anyone could use a filter such as a welder’s helmet to observe groups of sunspots. A sunspot consists of two regions, the umbra and the penumbra. The temperature of the umbra can be as low as 4,000 K and the penumbra that surrounds the umbra has a temperature of about 5,500 K which contrasts to the photospheric temperature of 6,000 K. The difference in temperatures makes the sunspots appear dark against the brightness of the
Conduction can be seen when the ice touched the cans full of insulation. The cooled cans touched the installation inside the can making it cooler. Convection can be found al over the place in our experiments. When we heated our model dwelling with the heat lamp the outside of the house heated. This in turn heated the air inside making the air temperature rise.
Another type of window that is used commonly to keep the home cool is tinted glass. Tinted glass and tinted window films are used on buildings to reduce heat gain through windows. Advancements in tinted glass have now allowed us to make the glass appear just as a regular window that you can see through. The tinted glass solution is also used in many vehicles and private rooms for privacy and to keep them cool in the summer to save on energy costs.
Conduction is the process by which heat is transferred from on solid to another. When a solid is heated the molecules inside, which are normally almost static, start to vibrate. When another solid is brought into contact with the heated solid the energy from the vibrating molecules at the edge of the heated solid is transferred to the outer molecules of the other solid.
Siegel, RP. "Solar Thermal: Pros and Cons - Part 1: Solar Heating and Cooling." Triple Pundit RSS. N.p., 21 May 2012. Web. 04 Mar. 2014. .
The biggest difference between summer and winter is the climate. One of the main attractions of summer is the warm weather. I like being outside on a bright sunny day, and letting the sun warm my body. I also like that we get an occasional thunder storm. The excitement fills the air when I see the thunder clouds rolling in. The sound of thunder, and the lighting shows that come from the storms are fascinating. On the other hand winter i...
There are four different types of seasons. They are Summer, Spring, Fall, and Winter. They each hold its own period in which they occur. Some days are long and some days are short depending on the season. Different weather, daylight hours, holidays, and different events are all events in which occur throughout the season. The events that can occur also depends on what’s the season. In each season, there are different activities that can be accomplished. For example, some seasons contain certain holidays that occur in them like Christmas, which only happens in the winter. There are a numerous amount of great activities to do during each season, but one specific season tops all of them. Out of all of the seasons, winter is the best season.
Again, it is the most common means of energy transfer and by understanding exactly what conduction means, we can identify it in some of the simple things we do. For instance, think of a pot placed on the stove, on a hot burner. The burner and the bottom of the pot are obviously touching, therefore the pot begins to heat up and get hot as well. As physical contact is the key element in heat transfer through conduction, we can see how important a role it plays in this situation. Now, say that your food is done, you turn the burner off and grab the handle of the pot, only to find that it is extremely hot as well. Again, we can thank conduction for this- as the heat was transferred through the bottom of the pot to the handle. Another example of conduction can be seen through ironing. We plug in and heat up the iron prior to placing it on the clothing in which we wish to smooth out. Once the iron has heated up, we place it on top of the article of clothing and it then heats up the clothing as well. Again, physical contact between the iron and the shirt show us that conduction plays the role of heat transfer in this scenario too. For a final example of heat transfer through conduction, let’s imagine a child, playing outside in the snow on a rather cold day. Once outside for a bit, he is freezing and decides to come inside. He takes off his snow gear, cuddles up to his father and begins to warm up
...ndows maximum benefit sunlight in the winter. And also this prevents the summertime sunshine to reduce any cooling expenses.
Solar power utilizes the sun’s energy to produce electricity, unlike other sources of energy, which rely on continual mining for raw materials. Consequently, producing solar energy from the heat from the sun does not result in the annihilation of the ecosystem, compared to the extraction of fossil fuels (Bode, 2005). Therefore, with the use of solar energy, it will help keep the environment clean, thus helping to combat the issue of global warming, which is a threat to the world’s ecosystem worldwide. The use of solar energy will help save the worlds vegetation, and help prevent the effects of global warming in future.... ... middle of paper ...