A commercial worm farm keeps beds or flow-through bins inside a shed, with misting or sprinkler lines to keep the bedding moist, extraction fans for ventilation and temperature, and sometimes cooling in summer. Harvesting uses trommel screens to separate castings, and feed preparation may involve a shredder or mixer. Lighting helps at dawn and dusk shifts. On hot summer days, the misting and fans are what keep beds in a range where worms thrive.
The UPS-mode inverter switches instantly, so misting timers and fan controllers keep running without a reset. The fuel cell then supplies the steady load from hydrogen made on off-peak power and stored at 30 bar or less for weeks. Misting pumps and fans are modest loads, so the store goes a long way.
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Misting, fans, controls and lighting fit within 15 kW continuous. A large trommel screen or shredder may be a heavier load, and during an outage those jobs can usually wait. Large sheds with big cooling plant may need a larger or multi-unit setup sized in the pilot. Round-trip efficiency is 30% or less, so the value is in protecting worm stock during outages, not cheaper running.
Possibly, depending on its motor and what else runs. Screening can usually wait until the grid returns. The system is designed to protect the beds first, with misting and fans taking priority over harvesting machinery.
About 9 litres of filtered, de-ionised water per kg of hydrogen, with most returned by the fuel cell. That is tiny compared with misting worm beds, and a filtered rainwater or bore supply is normally enough.
It would be sited outside the damp area with proper ventilation. It is designed to AS/NZS 60079 and ISO 19880, with redundant leak sensors and automatic shutdown and venting, and the hydrogen is stored at 30 bar or less.
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