If my solar panel is to replace my roof, does it make my home less hot?
Posted by admin in Solar roofing materials on 03 11th, 2010I’m not sure what’s my roof is made of, could be clay or concrete or decra. But you know this material absorb heat and subsequently travel all the way down into the house, that makes a house hot. Nevertheless, thought of going green, if i replace my roof with solar panel/cell, does it also make my home less hot since it does not absorb heat as much as conventional roof (solar cells are suppose to absorb light, right?)
From a purely theoretical standpoint, the solar energy that your panels convert to electricity can’t make your house hotter.
From a practical standpoint, the solar panels will shade the roof somewhat, especially if they are mounted on some kind of support a couple of inches above the roof plane.
Hard to say how much of an effect this would have.
read comments (3)Solar Roof Shingles: 2010 International Builders Show
Posted by admin in Solar roofing materials on 02 26th, 2010
Dow’s Powerhouse Solar Shingles promise to turn sunlight into savings. Consumer Reports takes a look at the 2010 International Builders’ Show. Learn more about roofing and siding on our web site http://www.consumerreports.org/cro/home-garden/home-improvement/index.htm?EXTKEY=I93YT01&CMP=OTC-YUTBE
Duration : 0:1:44
please help me Study Unit – Structural Design, Part 2?
Posted by admin in Solar roofing materials on 02 25th, 20101. ASHI standards require a home inspector to identify and
describe the type of structure and materials of construction
before
A. testing systems scientifically.
B. evaluating each system.
C. establishing value.
D. reporting remaining usefulness.
2. A good place to begin an interior structure inspection is the
A. garage.C. basement.
B. attic.D. plumbing system.
3. Surface molds and sapstain fungi discolor wood paneling
A. and are the most common cause of wood decay.
B. but don’t cause structural damage.
C. but exist only in very dry conditions.
D. and cause a burned or charred appearance on wood surfaces.
4. To be properly vented, the foundation should have one vent for every _______ square feet
of floor space.
A. 50C. 500
B. 150D. 1500
5. The primary horizontal load-bearing component in a floor frame is the
A. jack stud.C. beam or girder.
B. brick pier.D. sill plate.
6. The slope of a roof is
A. the length of a rafter from the top plate to the ridge.
B. generally expressed as a percent.
C. the ratio between the units of run and units of rise of a roof.
D. determined by measuring the total height of the building.
7. One improper construction method that can result in structural weakness is
A. the use of kiln-dried lumber in structural components.
B. grading soil to direct runoff away from the structure.
C. retention of topsoil and trees on the home site.
D. construction of artificial terraces using debris and backfill.
8. Stairs are considered hazardous when
A. the height of the risers varies by more than 3/8 inch.
B. the width of the treads does not strictly comply with codes.
C. risers are less than 73/4 inches high.
D. they’re covered with carpeting.
9. Two common cosmetic flaws in gypsum wallboard include popping nails and
A. header cracks.C. sagging ceilings.
B. termite cavities.D. brown water stains.
10. Which of the following statements about dehumidifiers is true?
A. Dehumidifiers automatically dispose of water produced by their operation.
B. Dehumidifiers should have automatic shutoff devices to prevent overflow.
C. Dehumidifiers are usually found in the attic.
D. Dehumidifiers are the best method for fail-safe moisture control in basements.
11. Structural failure in a roof may be due to
A. the presence of a vapor barrier between the attic floor and the ceiling below.
B. too little span between supporting members.
C. cuts made in rafters or trusses for addition of components such as stairways and fans.
D. use of dried wood for structural members.
12. A horizontal supporting member placed between two opposite rafters is called a
A. collar tie.C. chord.
B. ridge.D. jack rafter.
13. The term live load refers to the
A. weight of the structural components only.
B. weight of the occupants and furnishings.
C. weight of the foundation walls.
D. total weight of the entire structure.
14. A load-bearing horizontal component over a wall opening is called a
A. header.C. sill plate.
B. stud. D. wall joist.
15. Sagging in floor joists is typically caused by
A. oversized joists.
B. undersized joists.
C. improper nailing of sub-flooring.
D. improper moisture content of the wood.
16. Brick ties in brick veneer walls allow for
A. water drainage. C. expansion.
B. air circulation. D. inspection.
17. While inspecting a masonry foundation, you find evidence of “efflorescence.” This is
probably due to
A. leftover residue from construction.
B. too much lime in the concrete.
C. fungus.
D. water seepage.
18. Your inspection report does not need to include information on
A. steepness of roof pitch.
B. adequacy and condition of flashing.
C. condition of solar heating system equipment.
D. type and condition of gutters and downspouts.
19. Bulging of exterior walls usually results in
A. sagging of windows.
B. a rise in the main floor beam.
C. settling of corner posts.
D. sagging of the ridge board.
20. The structural technique that includes long vertical studs running from the sill plate to the
second floor roof frame is called _______ framing.
A. platform
B.Vertical
C.balloon
D.post
Sorry. – Giving you TWENTY answers is NOT help.
What you’re asking is for us to DO YOUR HOMEWORK.
Besides, these are EASY multiple choice questions.
Good luck in your studies,
~ Mitch ~
I want to build an electric car for fun.Were do I start? I have a plan/need help. GoGreen with ZERO EMMISIONS?
Posted by admin in Solar roofing materials on 02 18th, 2010So i have been researching E.V’s for a few months now, but i still need more info. I have some plans written up and models drawn though.. tell me what you think and what i should change.
I based my EV off of the SUNNEV by Art Haines
Specifications:
height- 5ft 2in
width- 4ft 2in
length- 8ft 4in
diameter of wheels- 26in
capacity- 2 people
speed- either 25 mph with 48v dc motor, or 45mph with 72v dc motor
Other Facts:
hand crank windows?
20 mile range
2 speed transmiton (hills)
windshield wiper (one)
comfortable seats (benchlike)
semi attractive
blue metal body (like zap xebra)
solar panel on roof
rear door with small storage space
mirrors
small battery powered radio
headlights
BUDGET– $5,000??
LIST OF ITEMS NEEDED…maybe more but cannot think of them
Chassis (steal?)
solar panel (48 watt)
front suspension with two shocks
rack and pinion steering with steering wheel
rear suspension with two shocks
four 26in wheels with axels
48v or 72v dc motor with regenerative breaking and reverse
inner frame (steal)
door assembly with latches and handles
floor (wood??)
seats
dashboard (some old used plastic thing off of ebay?)
brakes
speed control with pedal and speedometer
headlights
tail lights
blinkers
switches for above
110v charger
6 car batteries all connected in series with controller
wipers with switch
seatbelts
mirrors
horn
parking break
hand crank window system
floor mats
Lastly.. what materials should i use to make the chassis and body and such…how long do you think this will take and how much? thank you so much
Most of your Specs have to deal with body parts and not drive train or electric parts. Typically for an electric vehicle the primary considerations are the batteries, the BMS, a controller and the motor.
Solar panels on a moving vehicle have the problem of being fairly inefficient. This is because they are almost never oriented correctly. Use solar panels in a stationary array aimed properly and transfer the power to the vehicle when possible.
110 volts is a cheaper way to charge batteries but it is fairly slow. A 240 volt higher amperage charger tends to be much quicker. The Tesla 70amp 240 volt charger can charge the 53 KWh batteries in 3.5 hours. The 110 charger would take 32 hours.
For the Chassis I think you mean to say "(steel)" and not "(steal)"
A cheaper way to go is to convert an existing body. Here are three three cheap conversion examples: http://ecomodder.com/blog/cheap-diy-electric-car/
A good site for a general discussion of motors, existing electrics and conversions is this one: http://www.electric-cars-are-for-girls.com/
and you can find a bunch of other sites that might be helpful at my answer to this question: http://answers.yahoo.com/question/index;_ylt=Avom7IR_L6ffRUEyCwwz7sgjzKIX;_ylv=3?qid=20100202115611AABIok7
Good luck with it.
