Mobile Power Units Bryan Davis, Edwin Matute, Justin Hubbard, - - PowerPoint PPT Presentation
Mobile Power Units Bryan Davis, Edwin Matute, Justin Hubbard, Rayhaan Kasliwala Advisor: Dr. Ali Bazzi Sponsor: Hartford Marathon Foundation Team 1710 04/14/2017 1 Outline 1. Team Objectives 2. Summary of Major Equipment a. Solar Panel b.
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a. Solar Panel b. Battery c. Inverter d. Charge Controller e. Auxiliary
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❖ Electrical Loads
➢ Sustain all critical loads.
❖ Weight and Structural Durability
➢ Trailer weight and safety. ➢ Limited roof space.
❖ HMF Event Dates
➢ Compensate for back to back events.
❖ Budget Concerns
➢ ~$5000
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Battery Bank
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Batteries: Outback 200NC, 12V, 178AH, Lead-Deepcycle (x3 - in parallel)
❖ 24/48V Batteries are not cost effective (>$1000) and AH rating is more than needed. ❖ 178AH batteries to increase reliability of system. If 1 battery malfunctions, system still functionable.
Solar Panels: Astronergy 315 Watt Silver Poly Solar Panel
❖ The $224 per panel with a 315 watt power output was
per watt). ❖ $4 more than cheapest option, while producing 55 watts more.
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Inverter: Samlex PST-1500 ❖ Max 1500W, 12.5A output ➢ Handles our 9.18A load current ➢ Can handle motor inrush current ❖ Built-in GFCI protection Charge Controller: Midnite Classic 150 ❖ MPPT, Output : 80 - 96A ➢ Supports our 12V battery voltage ➢ Remote control and display via computer ❖ Built-in ground fault and arc detection
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Midnite Whiz Bang Jr. (with Shunt) ❖ Measures net current in and
Fuses: ❖ 15, 100, and 110A for additional protection
15A 100A 110A
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❖ HMF was concerned about mounting of panels, structural integrity of roof, and weather ❖ Mounting vertically enabled each panel to be mounted to 4 different structural beams at a total of 8 points each. ❖ Aluminum brackets used to resist corrosion
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❖ Panels need to be mounted securely for freeway travel without vibration. ❖ HMF should be able to remove with ease. ❖ Roof should remain waterproof even after panels removed. ❖ HMF’s concern for trapped water.
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Mounted in visible area
100A fuse in between the charge controller and batteries
(8 AWG)
with quick disconnect before 100A fuse
Whiz Bang Jr.
AWG)
(1/0 AWG) connected to quick disconnect
leads to receptacles
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in parallel with 1/0 AWG
fixed positioning
batteries and inverter.
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with conduit containing 14 AWG wires coming out
weatherproof receptacle box
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We are focusing on four questions to gather data:
1) With no PV input, how long can we run stated loads before batteries reach 20% SOC? 2) With batteries at 20% SOC, how long does it take to get them back up to 100%? 3) With all identified loads running, what is the inverter AC output (rms current, voltage, PF, etc.) and the DC input current? 4) What is the motor start-up transient AC current and PF, and DC current.
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❖ Using the Charge Controller built in function to gather data on the DC side of system. ❖ AEMC 8220 Power Meter will be used to gather data on the AC side.
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★ All values within specifications
★ Higher DC power supplied due to slight inefficiency of inverter Average data from 10 trials:
AC DC Starting Steady-State Starting Steady-State Current (A) 6.845 2.720 107.4 29.2 PF .7959 .8843
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Higher than nameplate 110W Powering motor blower, 3 speakers, 1 wifi router, 2 laptop chargers (721W nameplate total)
Motor turn-on Speakers and laptops plugged in 500Hz tone applied +2 Volume +2 Volume +2 Volume Max (+1) Volume
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Component Cost Panels $698 Batteries $1,235 Inverters $429 Charge Controller $611 Electrical Equipment $298 Mechanical Equipment $79 Shipping $358 Total $3,708
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❖ HMF is exceedingly pleased with their new system. Have used it at all 5 races they’ve had since the start of this year without any issues. “The system has been working
expectations.”
Operations
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