Week 3 (9/25/16-10/1/16)

9/27- Meeting with Dr. Bazzi

  • Duty cycle is term used to describe hours of operation
    • So for example the arc motor blower is on at all time, so it has a 100% duty cycle
  • Sort out details about equipment
  • Medium trailer will not be in our design space
    • Main focus on big trailer
    • Make footprint of design on 20 ft and 16 ft trailer
  • Important to find a more accurate load with duty cycle and load type.
  • Ask do they take all generators with them.
  • Make our weight footprint
  • Portable solar panel structure, that can be packed in the truck. (aluminum frames)
  • Battery Storage of about 800 A*hrs (may need about for)
  • IP 67 for battery enclosure.
  • HMF events link: http://www.hartfordmarathon.com/Events/Calendar_of_Events.htm
  • Pick  a charge Controller for charge design
  • Design for worst case scenario
  • Need to know irradiance and temperature, in order to find solar output
  • Tech services for welding and construction work.
  • Trailer would be outside.
  • Gather weather data: Temperature and irradiance
  • Calendar of HMF events and solar data
  • National Instruments that measure values for output display
    • 270 Middle Turnpike, Mansfield. Longley Building
    • Trainings ehs.uconn.edu/training
      • Electrical safety training for qualified persons (October 18th in EHS 118)
      • Lab Safety and Chemical Waste Management
    • Total power for loads is 660 KW/Hrs for 12 hours so 550W.
    • Pac= 120V*4A*0.6=288 W
    • Pdc=260/0.9=320W
    • Idc=320/48=6.67 A – limit at this current
    • For Design Specs:
    • Add descriptions of equipment
    • Add information about battery and current inverter
    • Put loads in one table
    • Load of lights? Assume fluorescent for  now
    • Why do they have 4 generators?
    • Look at NREL solar data for CT and temperature; overlap this with calendar of events and 1 week prior to each event
    • Charge controller in charge of charging batteries and maintaining battery charge.
    • Need to complete training through EHS
    • If panels cannot be fixed to roof, they must be stored in trailer and easily mounted on roof

PCB design:

  • Design a relay with a push button that connects and disconnects something
  • Protection circuit that senses current and trips breaker and has an adjustable setting. Has to be DC contactor because measuring the current coming out of the battery. This will prevent battery temp from getting too high
  • Add delay in circuit to prevent inrush, which would be a response of transience