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Grain drying questions
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<blockquote data-quote="DrWazzock" data-source="post: 8863701" data-attributes="member: 2119"><p>Theoretically warm damp grain contains enough energy to dry itself subject to the thermodynamic laws of unavoidable inefficiency.</p><p>By recirculating the hot damp dryer exhaust air back through a heat exchanger/pump/condenser extracting the heat from it, and recovering the latent heat of condensation you could have a machine that took in warm damp grain and output cold dry grain and cold water.</p><p>But like a household heat pump you’d have to input a considerable amount of energy as there is unavoidable inefficiency due to the second law of thermodynamics. Such a system would however be far more efficient and use much less energy than running a dryer and a cooler independently of one another where lots of heat energy are lost to the atmosphere in both cases but engineering practical difficulties would be considerable and capital cost would be eye watering. It would probably help towards net zero though!</p></blockquote><p></p>
[QUOTE="DrWazzock, post: 8863701, member: 2119"] Theoretically warm damp grain contains enough energy to dry itself subject to the thermodynamic laws of unavoidable inefficiency. By recirculating the hot damp dryer exhaust air back through a heat exchanger/pump/condenser extracting the heat from it, and recovering the latent heat of condensation you could have a machine that took in warm damp grain and output cold dry grain and cold water. But like a household heat pump you’d have to input a considerable amount of energy as there is unavoidable inefficiency due to the second law of thermodynamics. Such a system would however be far more efficient and use much less energy than running a dryer and a cooler independently of one another where lots of heat energy are lost to the atmosphere in both cases but engineering practical difficulties would be considerable and capital cost would be eye watering. It would probably help towards net zero though! [/QUOTE]
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