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首页> 外文期刊>Clean technologies and environmental policy >An integrated strategy targeting drying and cooling unit operations to improve economic viability and reduce environmental impacts in a mango processing plant
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An integrated strategy targeting drying and cooling unit operations to improve economic viability and reduce environmental impacts in a mango processing plant

机译：针对干燥和冷却装置操作的综合策略，以改善芒果加工厂的经济可行性并减少环境影响

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An integrated strategy of replacing boiler fuel and vapour compression cooling technology in dried mango chips processing plant powered on-grid and off-grid was investigated. Three scenarios for each power setting were studied: on-grid: coal as boiler fuel and conventional vapour compression chiller (CVCC) for cooling (scenario 1), mango seed as boiler fuel and CVCC for cooling (scenario 2) and mango seed as boiler fuel and adsorption cooling system (ACS) for cooling (scenario 3). Off-grid scenarios 4, 5 and 6 corresponded to on-grid scenarios 1, 2 and 3, respectively. Greenhouse gas (GHG) emissions and economic viability for each scenario were based on material and energy balances and South African economic conditions, respectively. On-grid scenario 3 showed the greatest potential for reducing emissions, emitting 7.10x10(5)kgCO(2)eq per annum and had best internal rate of return (IRR) of 25.33% compared to scenarios 2 and 1 with 7.21x10(5)kgCO(2)eq and 7.89x10(5) kgCO(2)eq emissions per annum and IRR of 20.33% and 17.48%, respectively. In off-grid, scenario 6 emitted the least GHG of 6.90x10(5)kgCO(2)eq and had the highest IRR of 24.84% compared to scenarios 5 and 4 with 6.98x10(5)kgCO(2)eq and 7.67x10(5)kgCO(2)eq emissions per annum and IRR of 18.88% and 16.09%, respectively. However, scenarios 3 and 6 had the highest energy demand due to mango seed drying. Nevertheless, the integrated intervention shows a great potential of reducing environmental impacts and improving the economic viability of a dried mango chips processing plant by using renewable biomass fuel and ACS that utilizes boiler waste heat. Mango seed can be solar dried to reduce increased energy demand.[GRAPHICS].
机译：研究了在并网和离网的芒果干片加工厂中替代锅炉燃料和蒸气压缩冷却技术的综合策略。对于每种功率设置，研究了三种方案：并网：以煤为锅炉燃料和常规的蒸气压缩式冷却器（CVCC）进行冷却（方案1），芒果种子作为锅炉燃料和CVCC进行冷却（方案2）以及以芒果种子作为锅炉燃料和吸附冷却系统（ACS）进行冷却（方案3）。离网场景4、5和6分别对应于离网场景1、2和3。每种情况下的温室气体（GHG）排放量和经济可行性分别基于物质和能源平衡以及南非的经济状况。并网情景3表现出最大的减排潜力，每年排放7.10x10（5）kgCO（2）eq，与情景2和1的7.21x10（5）相比，其最佳内部收益率（IRR）为25.33％ ）kgCO（2）eq和7.89x10（5）kgCO（2）eq每年的排放量和内部收益率分别为20.33％和17.48％。在离网状态下，方案6的温室气体排放最低，为6.90x10（5）kgCO（2）eq，并且具有最高的IRR，为24.84％，而方案5和方案4的温室气体为6.98x10（5）kgCO（2）eq和7.67x10每年（5）kgCO（2）eq排放量和IRR分别为18.88％和16.09％。但是，由于芒果种子干燥，方案3和6的能源需求最高。尽管如此，通过使用可再生生物质燃料和利用锅炉余热的ACS，综合干预措施显示出巨大的潜力，可减少环境影响并改善干芒果片加工厂的经济可行性。芒果种子可以进行太阳能干燥，以减少能源需求。[GRAPHICS]。

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