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Farm Building and Infrastructure
Renewable Energy
How many Kwh of heat to dry grain
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<blockquote data-quote="PeterW" data-source="post: 6519721" data-attributes="member: 141785"><p>Does this help?</p><p></p><p>Balring Farm, Mintlaw (courtesy of Hamish Watson) Hamish grows 283ha (700ac) of combinable crops (2,100t) and installed a 100t tray drier with stirrers in 2007 (previously had 2 mobile driers). The tray drier was supplied from Clark & Sutherland and cost approx £60,000 which included the shed. </p><p></p><p>The tray drier used two burners fuelled by gas oil, normally operating at 55oC with an electric fan blowing the hot air through the grain. A full tray (100t wet grain) would take 12hrs of drying (20% mc grain dried to 14%mc) plus a further 3hrs of cooling. Depending on the grain’s moisture content it would normally take 1,000l of gas oil to dry 100t of grain (10,000kWh, 1L diesel = 10kWh). The annual cost to dry the combinable crops was £14,700 and rising annually.</p><p></p><p>The economics Previously to dry 100t of grain would take 1,000l gas oil @70p = £700 or £7/t Using biomass, 100t grain would require 2.5t wood @ £ 50 = £125 or £ 1.25/t A saving of £ 5.75/t or £ 12,075 per year for the farm (2,100t) If eligible for RHI, can earn £7,711 for drying the grain which is index linked for 20-years Effectively the crops are dried for free, plus £ 5,086 surplus.</p><p></p><p>Balring Farm, Mintlaw (cont) Assumptions: </p><p>• Dry 2,100t pa using the biomass burner. </p><p>• Throughput of the tray drier 100t in 18hrs = operating for 378hrs </p><p>• 378hrs @ 400kw = 151,200 kWh </p><p>• 151,200 kWh @ 5.1p (tier 1) = £7,711 </p><p></p><p>Without RHI, pay-back of the £34,000 capital cost would be 3-years from the savings in fuel cost. With RHI, pay-back is less than 2-years plus crop drying in the future is free.</p><p></p><p>Regards</p><p></p><p>PeterW</p></blockquote><p></p>
[QUOTE="PeterW, post: 6519721, member: 141785"] Does this help? Balring Farm, Mintlaw (courtesy of Hamish Watson) Hamish grows 283ha (700ac) of combinable crops (2,100t) and installed a 100t tray drier with stirrers in 2007 (previously had 2 mobile driers). The tray drier was supplied from Clark & Sutherland and cost approx £60,000 which included the shed. The tray drier used two burners fuelled by gas oil, normally operating at 55oC with an electric fan blowing the hot air through the grain. A full tray (100t wet grain) would take 12hrs of drying (20% mc grain dried to 14%mc) plus a further 3hrs of cooling. Depending on the grain’s moisture content it would normally take 1,000l of gas oil to dry 100t of grain (10,000kWh, 1L diesel = 10kWh). The annual cost to dry the combinable crops was £14,700 and rising annually. The economics Previously to dry 100t of grain would take 1,000l gas oil @70p = £700 or £7/t Using biomass, 100t grain would require 2.5t wood @ £ 50 = £125 or £ 1.25/t A saving of £ 5.75/t or £ 12,075 per year for the farm (2,100t) If eligible for RHI, can earn £7,711 for drying the grain which is index linked for 20-years Effectively the crops are dried for free, plus £ 5,086 surplus. Balring Farm, Mintlaw (cont) Assumptions: • Dry 2,100t pa using the biomass burner. • Throughput of the tray drier 100t in 18hrs = operating for 378hrs • 378hrs @ 400kw = 151,200 kWh • 151,200 kWh @ 5.1p (tier 1) = £7,711 Without RHI, pay-back of the £34,000 capital cost would be 3-years from the savings in fuel cost. With RHI, pay-back is less than 2-years plus crop drying in the future is free. Regards PeterW [/QUOTE]
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How many Kwh of heat to dry grain
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