南京某粮食烘干中心热源替代方案的研究
Study on the Alternative Heat Source of a Grain Drying Center in Nanjing

本文针对南京某粮食烘干中心的热源改造工程，对燃煤热风炉、空气源热泵和燃气热风炉三种烘干热源的节能性、经济性和环保性进行综合分析，以寻求最佳的替代热源。结果表明：空气源热泵不仅运行能耗最小，与燃煤热风炉相比，仅为当量标煤的23.6%、等价标煤的69%，并且单位稻谷的烘干成本最小，为0.0405元/kg，投资回收期仅为251天；当其运行所耗电能来源于清洁能源发电时，空气源热泵的环保效益最佳。对于该项目而言，空气源热泵作为热源替代，综合效益最佳。
This article aims at the heat source reconstruction project of a grain drying center in Nanjing, comprehensively analyzes the energy-saving, economy and environmental protection of three drying heat sources of coal-fired hot blast stove, air source heat pump and gas hot blast stove, to find the best alternative heat source. The results show that the air source heat pump not only has the smallest energy consumption in operation, but only 23.6% of the equivalent standard coal and 69% of the equivalent standard coal, the drying cost per unit of rice is the smallest, which is 0.0405 yuan/kg and its payback period is only 251 days. When generating electricity from clean energy, the air source heat pump has the best environmental protection benefits. For this project, the air source heat pump is used as a heat source replacement, with the best comprehensive benefit.