Wednesday, November 29, 2017

Week 15: Presentation #3



Dr. Furman has provided the following feedback.
1) Include detailed Bill of Materials (Screws, clamps, steel stud)
2) Select galvanized steel stud with 10 inches in depth to reduce 6 cm of deflection

Our group plans to do the following tasks.
1) Finalize which solar panels our group will be using
2) Find out which material would look similar to the solar panels

Saturday, November 18, 2017

Week 13: Lockheed Martin Presentation



This week, the solar team focused on preparing for the Lockheed Marin presentation. Overall, the team presented well and had a great experience. There were some technical questions from panels at Lockheed Martin, but the team answered them with best efforts.

Saturday, November 11, 2017

Week 11 & 12


For week 11 and 12, we focus more on designing and improving the existing design from Futran. In their designs, the solar panels are 1.6x1 m; therefore, the total length will be more than 9m if we are going to build at least 9m long track.



Figure 1: Assemble of two supporters and a cross canopy.

Figure 1 is an assembling of two supporters and a solar racking system. The new design has two cross trusses that were added to support the weight of the frame and the solar panels.



Figure 2: Using truss that was made out of sheet metal

Using sheet metal to construct the full-scale designs are considered as a low cost and lighter weight compared to I beams. If it was folded correctly it will generate alot stronger structure, thus it's more efficient to use sheet metal for the Spartan Superway than other types of beams.


Figure 4: A different way to connect and have a stronger rectangle truss



Wednesday, November 8, 2017

Week 10

More details are being ironed out concerning the truss design.  The team is currently trying to figure out how to attach the linkages.  The linkages will be made out of sheet metal.  Sheet metal should be considerably easy to bend into the desired "U" shape that is desired for the linkages.  A different option would be to simply purchase the linkages from a place like Home Depot. Much time is being spent in Solidworks at the moment.

Monday, October 30, 2017

Week 9: Second Presentation



Connecting method between truss and track have to be figured out.
Also, figure out how to connect truss structure with shell design on top.
Use angled bracket instead of bending metals to save materials.
Solar panel comparison was not correct: Polycrystalline falls into the category of Monocrystalline.

Thursday, October 19, 2017

Week 8

For this week, solar team successfully calculated the power that is needed for the 9 m track.  Since we are going to build 9 m long horizontal track, some of the values are changed to meet the requirements, especially the elevation force.

Changes:
elev_comp = 0 #(1/n_bar)*n_t*M_v*(g*z)
aux_comp = 0 #n_t*P_aux*t_s
M = 400 #(kg) Mass of fully loaded ATN vehicle
P_aux =0 # previous 3500.0 auxiliary power, W (see Wikipedia for auto air con)

V_l = 1.5 # line speed, m/s V_w = 1.5 # average wind speed, m/s

Result:
** Energy per vehicle **
Energy required, E(t_s) = 8.70e+02 J
Average trip time, 0.5 minutes
Average power, P_avg = 32 W


>> Energy per 150 vehicles <<
Energy required, E(t_s) = 1.305e+05 J
Average trip time, 0.5 minutes
Average power, P_avg = 4.73e+03 W


KE loss = 3.71e+02 J ---> 42.6%
Air drag loss = 2.26e+01 J ---> 2.6%
Rolling resistance loss = 4.77e+02 J ---> 54.8%
Aux power loss 0.00e+00 J ---> 0.0%

 Based on the power was calculated below, there are some of possible solar panels that can be used for the  full scale solar design.


18 panels x 169.99= 3059.82


$318.99x9=$2870.91


Convertor:




Wednesday, October 4, 2017

Week 7

The time normally reserved meeting and brainstorming was spent listening to a lecture from Professor Du and taking a quiz on project report writing guidelines.  The time that was left for class was spent discussing the discrepancies in the energy calculations.  The team is currently attempting to reverse engineer the required power input equation of the full-scale track, which was approximately 5.61*10^6 kWh.  As of right now, the team is still off by about 100,000 kWh for the power calculation, which is no small discrepancy.

More design details were discussed in a meeting with Dr. Furman, who encouraged the team to continue pushing out design ideas and sketches as rapidly as possible.  Putting out a high number of sketches should be an effective method for generating ideas.