Abstract
Small rectangular bales of alfalfa were successfully dried using two forced-air drying systems with heat from LP gas, solar energy (with off-peak electricity on some tests) or ambient air, and with average dry matter densities of alfalfa ranging from 80 to 166 kg/m3 (5.0-10.4 lb/ft3) with average moisture contents up to 37% (w.b.). The drying rates, pressure requirements for forced flow, psychrometric data, and hay quality before and after drying are reported. The data and a developed drying parameter for small rectangular alfalfa bales provide guidance for design of baled hay dryers.
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