Passive Solar Home Design
What we did:
1. Design a Hot Water Heater
2. Learn about the Solar Angles
3. Daylighting Design Activity
4. Site Selection
5. Materials Testing
6. Building Design
7. Justification
8. Generation of Electricity
While we were designing a hot water heater, we had to use specific materials to make a successful hot water heater. We had to use: copper tubing(we used the smaller tubing), aluminum foil, saran wrap, a 42oz bottle, a cardboard box,black spray paint, and obviously some water. We needed to make the box have a reflection to heat up the water inside the tubing. Our group needed to angle the box in a certain way to make the water run through due to the breaks in the copper tubing. What worked well was angling the box to make the water run through faster. What didn't work for us was the complex shape of the tube. Our total design's heat gain was: 8.372 degrees Celcius.
Our next assignment was to build a cardboard model of a house to display several different types of daylighting. The process started by first sketching a layout of the dimensions of the house, along with the rooms. There was the requirement that the house must have the scale of 1000 sq. ft. Then we estimated how many light bulbs we think will need, and approximate the amount of time each bulb will be used per day. We calculated the energy consumption for a total of one day by using the equation:
(# of bulbs) × (Bulb wattage) × (average # of hours per bulb)
(1000 watts/kilowatt )
In result, we got a total of 13.68kW. Next, we added different types of daylighting techniques, and orientented our house to see where it would receive the most sunlight. On the roof, we added two skylights, and on the south and east side walls, we had several clerestory windows. We also placed several standard sized windows throughout all four walls of the house. In total, with the addition of these windows, we saved 1.58kW of energy due to lighting. To increase this amount, our group agreed that more windows should have been added to south side because that's were the majority of sunlight enters throughout the day. We also could have used more daylighting techniques such as light shelves and solar tubes. We then tested our models by hanging a light bulb, from a specific distance, to remble the sun. We moved the lightbulb at a consistent arc to see how our house would interact with the different times of day. As a result, it seemed pretty dim on the south end of our house.
1. Design a Hot Water Heater
2. Learn about the Solar Angles
3. Daylighting Design Activity
4. Site Selection
5. Materials Testing
6. Building Design
7. Justification
8. Generation of Electricity
While we were designing a hot water heater, we had to use specific materials to make a successful hot water heater. We had to use: copper tubing(we used the smaller tubing), aluminum foil, saran wrap, a 42oz bottle, a cardboard box,black spray paint, and obviously some water. We needed to make the box have a reflection to heat up the water inside the tubing. Our group needed to angle the box in a certain way to make the water run through due to the breaks in the copper tubing. What worked well was angling the box to make the water run through faster. What didn't work for us was the complex shape of the tube. Our total design's heat gain was: 8.372 degrees Celcius.
Our next assignment was to build a cardboard model of a house to display several different types of daylighting. The process started by first sketching a layout of the dimensions of the house, along with the rooms. There was the requirement that the house must have the scale of 1000 sq. ft. Then we estimated how many light bulbs we think will need, and approximate the amount of time each bulb will be used per day. We calculated the energy consumption for a total of one day by using the equation:
(# of bulbs) × (Bulb wattage) × (average # of hours per bulb)
(1000 watts/kilowatt )
In result, we got a total of 13.68kW. Next, we added different types of daylighting techniques, and orientented our house to see where it would receive the most sunlight. On the roof, we added two skylights, and on the south and east side walls, we had several clerestory windows. We also placed several standard sized windows throughout all four walls of the house. In total, with the addition of these windows, we saved 1.58kW of energy due to lighting. To increase this amount, our group agreed that more windows should have been added to south side because that's were the majority of sunlight enters throughout the day. We also could have used more daylighting techniques such as light shelves and solar tubes. We then tested our models by hanging a light bulb, from a specific distance, to remble the sun. We moved the lightbulb at a consistent arc to see how our house would interact with the different times of day. As a result, it seemed pretty dim on the south end of our house.
Site Selection
To begin the first section of our passive solar home design project, we had to find a suitable and beneficial location. We started by coming up with different features that our location should contain. Such as an efficient amount of sun exposure, is visible to the community, displays physics concepts, easy to access by students, is able to fit the purpose of the building, and has leveled, solid grounds. After throwing out all those ideas, the groups searched for a suitable location. The top two locations were the open areas between the outdoor basketball hoop and Lefty Gomez Baseball Field (which was what our group selected), and the dirt patched area behind the school portables, along Novato Blvd. Our class selected these sites by rating them on a scale from 1 to 10 for each of the brainstormed categories. I unfortunately was unable to upload a picture of our location.
Materials Testing
After our group had selected our site, we started coming up with ideas of materials that could be used to build our house. The materials were carpet, bamboo, dark hardwood, light tile, and dark granite for the floors; drywall, whiteboard, brick, stuco, redwood, corrugated metal, aluminum, and PVC for the inside or outside walls; and fiberglass,spray foam, styrofoam, and coconut fibers for possible insulation. Each group was assigned two or more materials to test to see which would result as the better option. Our group was assigned to test redwood and PVC. The testing procedure began by projecting a light bulb 20cm above the items, and after every five minutes, we recorded the temperature of the material. After 45 minutes of constant testing with the light bulb on, we turned it off and recorded the cool down time every five minuets for about 20 more minuets. After recording all the data from every group's materials, we analyzed the data by drawing up four graphs to compare and contrasts how each material did. We realized that each item served a different purpose. Such as carpet being good at absorbing heat because it captures the energy in the air pockets, the light tile reflecting heat well because of its light color, and fiberglass providing good insulation because it is able to trap heat within its fibers. With the results of this experiment, we can now determine which materials will interact with the sunlight the best.
Building Design
The elements needed to fully design our passive solar structure were: a material list that included all materials need to build our house,digital or hand drawn blueprints of the walls, floors, and other aspects of the house, key features that show its energy efficient, along with other clever selling points, a scale model or physical prototype of the house, a presentation to put it all together.
Materials: Our materials list consisted of many different items from dark hardwood floors to goldbond drywall, compound joint tape to fiberglass insulation, white cedar siding to driftwood roof shingles. In total the full list materials came to $3692.34 (without the cost of tax or simple tools).
Blueprints: Our blue prints were hand drawn, and specifically showed the framing of the house such as the placement of the windows, these are seen below.
Key Features: We had several key features regarding or house. We could insert more insulation into our walls and roof because our lumber for the framing, gave a big enough space. The price of our house is also well under budget, so we got to purchase high end siding, which is not only durable, but also looks very nice. We have a big window on the south side of our house because most of the sunlight enters through this direction. The location of our house is also a key feature because it covers most or all we listed for site selection.
Scale Model: For our scale model, we made it out of cardboard and used construction paper to resemble different types of building material we will use. Such as the black roofing, we are going to use dark driftwood shingles. We are using white cedar that has tints of gray for our outdoor siding, so we painted it gray and drew checkered lines to show that it comes in bundled shingles. We used white construction paper to show the color of the drywall, and placed pieces of wood to resemble hardwood floors.
Presentation: We as a group decided that a three-fold board would be the best visual presentation to present to the audience. It would be easier to read and follow along than on a computer screen. We also wanted our model to be a physical prototype so that viewers will picture our house with a better understanding of what it would look like.
Materials: Our materials list consisted of many different items from dark hardwood floors to goldbond drywall, compound joint tape to fiberglass insulation, white cedar siding to driftwood roof shingles. In total the full list materials came to $3692.34 (without the cost of tax or simple tools).
Blueprints: Our blue prints were hand drawn, and specifically showed the framing of the house such as the placement of the windows, these are seen below.
Key Features: We had several key features regarding or house. We could insert more insulation into our walls and roof because our lumber for the framing, gave a big enough space. The price of our house is also well under budget, so we got to purchase high end siding, which is not only durable, but also looks very nice. We have a big window on the south side of our house because most of the sunlight enters through this direction. The location of our house is also a key feature because it covers most or all we listed for site selection.
Scale Model: For our scale model, we made it out of cardboard and used construction paper to resemble different types of building material we will use. Such as the black roofing, we are going to use dark driftwood shingles. We are using white cedar that has tints of gray for our outdoor siding, so we painted it gray and drew checkered lines to show that it comes in bundled shingles. We used white construction paper to show the color of the drywall, and placed pieces of wood to resemble hardwood floors.
Presentation: We as a group decided that a three-fold board would be the best visual presentation to present to the audience. It would be easier to read and follow along than on a computer screen. We also wanted our model to be a physical prototype so that viewers will picture our house with a better understanding of what it would look like.
Justification
In class, all groups we were assigned different energy sources to research. We had to answer how do these energy sources work and what are the positives and negatives of using it. Electricity is consumed so much by Americans that we spent a little over 100 dollars a month, which adds over to $1,200 a year. Because we use so much electricity, different forms of energy efficiency have been being used. My groups task was to research coal (fossil fuel) and nuclear/uranium. We found that coal is very cheap and is a stable infrastructure, however it destroys landscapes and pollutes the air. While nuclear energy generates a lot of power and pollutes very little, but uranium produces deadly waste that is highly dangerous and takes thousands of years for the waste to not be deadly. Below is the URL to our justification website:
tinyurl.com/o2qeg8z
tinyurl.com/o2qeg8z
Wind Turbines
For this project, we had to design two different kinds of wind turbines, a HAWT (horizontal axis wind turbine) and a VAWT (vertical axis wind turbine). Wind turbines are Eco friendly by not produces any pollutions, however they aren't very efficient when not much wind is blowing and are harmful to birds. We made our HAWT and VAWT by cutting up heavy paper and shaping them they we think would think would run the fastest. After designing the blades of the turbine, we stick them on to wooden sticks and connect them to a green connector. We the turn on the fan and read the number on the device that measures the turbines speed. In result, our HAWT worked better. Its highest speed was 0.480W while our VAWT reached 0.250W.
Conduction- the transfer of heat through a specific material (solid). Ex: a pot conducts heat to food
Convection- the transfer of heat through liquid or gas. Ex: Ice melting
Radiation- energy transmitted as rays, waves, or particles. Ex: sun through space
Insulation- materials that are bad conductors. Ex: fiberglass
Fluids- a substance, as a liquid or gas, that is able to flow and has the tendency to assume the shape of its container. Ex: water, blood, oxygen.
Pressure- the weight or force that is produced when something presses or pushes against something else. Force per surface area where force is normal to the surface, measured in pascals. Pressure= Force/Area. The deeper you go into water or the higher density of a liquid, the more pressure. The pressure due to a liquid= (density)(depth). Water density is measured either in g/mL or kg/L.
Boyle's Law- For a constant number of molecules of gas at constant temperature, the product of pressure and volume is constant.
Bernoulli's Principle- The statement that the pressure in a fluid decrease as the speed of the fluid increases. Ex: when there is lower pressure on top of airplane's wing, and higher pressure below the wing, the plane is pushed up into the air.
Conduction- the transfer of heat through a specific material (solid). Ex: a pot conducts heat to food
Convection- the transfer of heat through liquid or gas. Ex: Ice melting
Radiation- energy transmitted as rays, waves, or particles. Ex: sun through space
Insulation- materials that are bad conductors. Ex: fiberglass
Fluids- a substance, as a liquid or gas, that is able to flow and has the tendency to assume the shape of its container. Ex: water, blood, oxygen.
Pressure- the weight or force that is produced when something presses or pushes against something else. Force per surface area where force is normal to the surface, measured in pascals. Pressure= Force/Area. The deeper you go into water or the higher density of a liquid, the more pressure. The pressure due to a liquid= (density)(depth). Water density is measured either in g/mL or kg/L.
Boyle's Law- For a constant number of molecules of gas at constant temperature, the product of pressure and volume is constant.
Bernoulli's Principle- The statement that the pressure in a fluid decrease as the speed of the fluid increases. Ex: when there is lower pressure on top of airplane's wing, and higher pressure below the wing, the plane is pushed up into the air.
Reflection
In this project, I thought my work was decent. It definitely could have been improved, like we could have been a little neater with our work but it was definitely a great finished project. I thought the presentation of our project was well prepared and neatly organized. What we could have improved on was our public speaking skills in our presentation because we said a lot of "umms" and "uhhs". Those "dead" words are a turn off for the audience when they come and watch our project. The overall grade that I would give for our group is an A-. I also really enjoyed getting to have a chance to talk with people that I don't normally talk to. On the downside I warn you, Toran makes way too many damn puns. Like, its almost obsessive. I think Toran or I will need to see a psychiatrist in the near future.