Design Blueprint: Solar Heating Stored Beans

Design blueprint derived from the source paper (DOI 10.5281/zenodo.24121710): Solar heating — sealing legumes in a black enclosure in strong sun — is a low-cost disinfestation method against bruchid beetles, but the exposure needed is usually given as 'a few hours' without reference to bag size. This study computes the heating time from an energy balance: irradiance 850 W/m2, absorptivity 0.85, losses of 38 percent, bean specific heat 1.9 kJ/kg K, and a target mean temperature of 50 C from a 30 C start. A 5 kg bag reaches the target in 2.14 hours, a 10 kg bag in 2.62 hours, a 25 kg bag in 3.68 hours and a 50 kg bag in 4.71 hours; adding a one-hour hold gives working sch Status: DESIGN BLUEPRINT — SIMULATED, NOT MEASURED — NOT BUILT. All numbers are simulated values from the source paper's computation, deposited with this blueprint as compute.py and results.json. AI-use disclosure: Dave, an AI research system, assisted with the computation and drafting under the author's direction; author of record William Alexander Aldred.