PP20 Power Pallets
All Power Labs
The PP20 power pallet is a biomass gasifier system that converts biomass into heat and electricity.
The PP20 Power Pallets product is a biomass gasifier system that converts dense biomass (such as wood chips and nut shells) into heat and electricity. It is a compact, integrated system that delivers electricity under $1.50/Watt. The product was designed and distributed by All Power Labs. The PP20 was discontinued and replaced by the PP30 Power Pallets, which is more efficient in power output, thermal capabilities, new grid-tie hardware, filtration and noise-reduction functionalities for cooling fans, larger ash/dust collector, an added hopper to reduce occurrence of feedstock jams, and new three-phase genheads.
This product has been implemented and distributed by All Power Labs.
26,000 – 40,000 USD
Goal 7: Affordable and clean energy
Target users include off-grid consumers with access to biomass, particularly in regions where the feed-in tariff for providing the grid with renewable energy is high enough to make feeding biomass energy onto the grid profitable Interview with Representative in 2017
This product is individually manufactured to order.
Users can obtain this product directly from manufacturer.
As of 2017, approximately 100 units have been distributed.Interview with representative in 2017
The manufacturer-specified power rating
The form of the output energy, either mechanical, thermal, or electrical
The biomass that can be used with this product, such as wood, agricultural waste, food waste, etc.
The amount of biomass required per hour of operation
What else is needed, such as fuel, electricity, etc.
For all the inputs listed above, the amount required per hour
The type of combustor, such as gasifier, underfeed stokers, fluidized bed boilers, etc.
The efficiency when converting biomass into energy
The emissions of the system
The dimensions of the system (ie: 3 x 2 x 4 m)
The PP20 Power Pallet is made up of a GEK Hot TOTTI multi-stage gasifier, spark fired industrial engine, generator head, and electronic controller. The system automatically adjusts syngas/air mixture via a wide band Bosch oxygen sensor, shakes the grate when needed, and removes ash via a mechanical auger. The Process Control Unit (PCU) monitors and responds to all internal reactor, filter and engine conditions, and displays the results on an LCD screen.
Power Pallet genheads are configurable to single, split or three phase, at 120/208/240 Vac, 60 Hz or 50 Hz, and are also available with an Optional Grid-Tie package allowing the PP20 to work with other power generating devices–such as wind or solar, as well as with additional Power Pallets, utilities or micro-grids–to generate reliable synchronized power.
The product has a continuous power rating of 15 kW at 50 Hz, and 18 kW at 60 Hz. The sound level at 30 feet is 85 dB. The biomass consumption is 1.2 kg/kWh – 2.5 lbs/kWh. The run time per hopper fill (at 250 kg/m3 fuel density) is 10 hrs at 5 kW, 5 hrs at 10 kW, and 3 hrs at 15 kW. The maximum continuous operation time is over 12 hours, and the start-up time is 10-20 minutes.
Operating conditions include an ambient temperature of 5-40 °C (40-100 °F), and humidity level of 5-95% RH. The installed footprint without the ash vessel or grid tie is 1.36 x 1.36 m (53.5 x 53.5 inches). In addition, the manufacturer suggests that the product be placed in a well-ventilated protected from rain and direct sun.
Provided by the manufacturer.
This product includes warranty at the manufacturer’s discretion, with an expected lifetime of over six years with routine maintenance.
Designer specified performance targets include: minimized component architecture, compact, improved tar conversion, fuel flexibility, and improved general efficiency.
Testing performed by researchers at Duke University attempted to model the dynamic performance of the PP20 Power Pallet by characterizing the fuel ratio, run time, etc. of the equipment, and creating a transfer function that captured the system performance. Overall, it was found that the system has approximately a 0.34 second time delay, a 0.10 second time constant, and a 600 second delay at PP20 startup. Other characteristics of the PP20 could not be defined given their significant dependence on environmental factors.
Testing organizations include the manufacturer and Duke University.
Potential hazards related to the operation of this product include exposure to flammable gases. Additional safety handles and warnings are included on the product.
Complementary technical systems include the combined heat and power (CHP) module.
Ayanian C. and Desai S., 2016, “Control of Biodiesel Generator Set in Biomass Gasification Emulation for Use in Emergency Energy Module (EEM),” Duke University.
The manufacturer cites load testing for run time, sustained power output, and low threshold tests as evaluation methods. This product has not been specifically evaluated in the field with end-users.Interview with Representative
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