Biogas-powered evaporative cooling for smallholder dairy farmers’ evening milk: Zeolite characterization and regeneration

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dc.contributor.authorNdyabawe, Kenneth
dc.contributor.authorBrush, Ryan
dc.contributor.authorSsonko, Richard E.
dc.contributor.authorKisaalita, William S.
dc.date.accessioned2025-04-15T09:37:55Z
dc.date.available2025-04-15T09:37:55Z
dc.date.issued2019
dc.description.abstractA low-capacity (15.5-L) evaporative cooler, utilizing zeolite as an adsorbent, for saving smallholder dairy farmers’ evening milk, was not well received due several factors, addressed in the second generation higher capacity (>50 L) design. Like the first generation the new design uses zeolite and is powered by biogas. The first development step was to establish a protocol for testing commercially available zeolites to determine zeolite suitability for use in the design and to characterize the performance of a zeolite biogas-powered regenerator. Using an in-house developed protocol, zeolite beads of diameters 2.5–5 mm were tested and we found that 10 angstrom (Å) zeolites have a higher water adsorption capacity (6–7%) in comparison to 3 Å zeolite beads, suggesting that larger pore zeolites provide higher cooling capacity. However, large pore zeolite beads showed up to 18 times variance in repeat water adsorption compared to 3 Å zeolite, indicating that zeolite of small pores may provide more cooling cycles. Our biogas powered regenerator achieved and maintained the regeneration temperature of 200 °C when tested with both propane and biogas. This result affirms that our system can be operated on the farm using biogas as the energy source.
dc.identifier.citationNdyabawe, K., Brush, R., Ssonko, R. E., & Kisaalita, W. S. (2019). Biogas-powered evaporative cooling for smallholder dairy farmers’ evening milk: zeolite characterization and regeneration. Sustainable Energy Technologies and Assessments, 34, 126-132.https://doi.org/10.1016/j.seta.2019.05.003
dc.identifier.urihttps://doi.org/10.1016/j.seta.2019.05.003
dc.identifier.urihttps://nru.uncst.go.ug/handle/123456789/10670
dc.language.isoen
dc.publisherSustainable Energy Technologies and Assessments
dc.titleBiogas-powered evaporative cooling for smallholder dairy farmers’ evening milk: Zeolite characterization and regeneration
dc.typeArticle
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