Solar DecathlonTeam Tidewater

Status Update 12NOV2012

Appliance Analysis Got the average yearly usage from internet sources

◦ Broke it down to kWh/day and /usage Determine the Max Energy Consumption for

Competition◦ Measured Test

Different testing procedures per appliance Water and electrical consumption

◦ Dinner Party How many people eating How often each appliance is used

US average residential rate $0.1151 kWh◦ At 135 kWh it will cost us $16.15 to operate at peak

performance

Gaming

Product Manufacturer Model # Energy (kWh/yr) *

Energy (kWh/wk)

Energy (kWh/day)

Max Energy (kWh/usage)

Projected Max Energy usage (kWh/26 days) for competition

**

Projected Max Water usage (gal/26 days)

for competition **

Roomba Robot Vacuum iRobot 56001 0.00 0.00 0.00 na na  

Countertop Microwave Kenmore 6912 0.00 0.00 0.00 1.20 12.00  

Slide-In Range GE JSP42SNSS 0.00 0.00 0.00 3.60 36.00  

Refrigerator/Freezer Kenmore 78093 454.00 8.73 1.25 1.25 32.50 0.10

Dishwasher Bosch SGE63E15UC 234.00 4.50 0.64 2.25 22.50 6.66

Washer Bosch WAS20160UC 125.00 2.40 0.34 1.20 6.00 8.89

Dryer Bosch WTV76100US 0.00 0.00 0.00 1.20 6.00  

TV Samsung UN60ES7100 279.00 5.37 0.77 0.77 20.02  

Laptop AppleMD101LL/A

0.00 0.00 0.00 0.53 5.30  

      1092.00 21.00 3.00   140.32  

5.397 kWh/day

Notes: * Energy consumption values obtained from internet sources

** Projected max energy consumption is determined by how often the product is used during the competition

Energy Analysis of Appliances

Bosch Solar Module 255 Wp / M-215 Micro Inverter Performance

Performance of 40 panels in Irvine, California during October

37.2903 kWh 4.79 kWh/m2/day Contributing factors

10 degrees optimal panel tilt Latitude 33.8 degrees N Longitude 117.7 degrees W

Assumptions Minimum shading 0.843 DC to AC loss factor

Calculations in Progress

SunDrum’s thermal energy (J/day) Allows HVAC to calculate more realistic energy loads

SunDrum’s contribution towards panels efficiency

Calculations in Progress Efficiency of panels

Cloudy/ Moderately cloudy day

Layout of Panels • Structural calculations can be generated more accurately• SunDrum placement is selected and energy loss can be

calculated• Design of UnIrac can be finalized

HVAC-Sun Drum

Sun Drum Heat Gain Calculations

HVAC-Vitocell

Recovery Rate Calculations

Framing ceiling◦ Insulation SIPs?

Space Frame Calculations

Structural Update

Conclusion and Questions