#Technology-Connections #video dissecting an “Aeocky” rotary desiccant dehumidifier, which uses red-hot heating elements, a shaded-pole fan motor for the regeneration air, and a plastic cross-current heat exchanger to regenerate the desiccant and recondense the water. The main desiccant wheel has air forced through it by a large (300mm?) BLDC-like fan. He reports that it’s much smaller than vapor-compression types, the fans only consume about 12W, but the regeneration heating element is 300W, very similar to a vapor-compression device, condensing some 100g of water per hour (11kJ/g water), about ⅕ as much as the refrigerant-based unit. A Peltier-based dehumidifier was about as efficient as the desiccant-based unit in his moist bathroom, but the desiccant-based unit was able to remove water even from the 40%-RH air of his office. Most the ones he found on amazon.co.uk in the US$170–300 range were 580–735W, 7.5–11ℓ/day, and 6–7.5kg, most being almost twice as efficient as the one he tested (≈5kJ/g water). Recommends an adsorption dehumidifier brochure from Technofrigo Tuscany (“TFT dry air solutions”). #desiccants #mechanisms #HVAC
on 02025-09-03#video by #Ziroth on Helix Earth Technologies’s #air-conditioning with undisclosed liquid #desiccants to reduce #energy demand
on 02024-11-14notes on #materials properties of #desiccants and other salts
on 02020-11-12analysis of #desiccants market, including activated charcoal
on 02020-11-11the Cromer cycle is a #thermodynamic cycle using #desiccants for indoor climate control
on 02020-11-11