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小型冷库设计论文[带图纸].doc

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小型冷库设计论文[带图纸].doc

1西安文理学院机械电子工程系本科毕业设计(论文)题目小型冷库设计专业班级08机械设计制造及其自动化2班学号08102080219学生姓名安剑指导教师陈燕设计所在单位西安文理学院2012年5月西安文理学院本科毕业设计(论文)2小型冷库设计摘要随着社会经济的飞速发展和人民生活水平的不断提高,人们对食品的保鲜要求也会越来越高,对冷藏食品的需求不断增多。而冷库主要用于生鲜农副产品和食品饮料的储藏。由于其具有冷藏、保温的特殊功能,能满足生鲜食品冷藏运输中的保鲜和冷冻要求,使其在冷链物流中起着重要的作用,成为冷链物流的中不可缺少的一个环节。因此了解冷库的建设及其发展就显得相当重要。本次设计是小型冷库的制冷系统的设计。根据冷库冷量的要求,结合当地的环境气候,以及课本上的知识理论来完成完成满足当地实际需要的冷库。在系统设计中,主要是进行压缩机的选取,以及制冷器、蒸发器的设计选择,和制冷剂充灌量的估算以及辅助设备的选择。小型冷库为生鲜农副食品和饮料的冷藏提供了一个空间,满足了生鲜食品在冷藏运输中的保鲜和冷冻要求。提高了人们的生活水平。关键词冷库设计制冷系统负荷计算选型计算西安文理学院本科毕业设计(论文)3TheDesignOfSmallStorageAbstractWiththerapiddevelopmentofsocialeconomyandtheimprovementofpeopleslivingstandard,Therequirementofpeopleonfoodpreservationwillbegettinghigherandhigher,theincreasingdemandoffrozenfood.Andcoldstorageismainlyusedforfreshagriculturalproducts,foodandbeveragestores.Becauseithasthespecialfunctionofrefrigeration,thermalinsulation,cansatisfythefreshfoodcoldstorageandtransportationoffreshandfrozen,thecoldchainlogisticsplaysanimportantroleinthecoldchainlogistics,hasbecomeanindispensablecomponentof.Therefore,understandingtheconstructionofcoldstorageanditsdevelopmentisveryimportant.Thisdesignisthedesignofsmallcoldstoragerefrigeationsystem.Accordingtothecoldcoldvolumerequirements,combinedwiththelocalclimate,aswellastheknowledgeofthetextbooktheorytofinishtomeetthelocalneedsofthecoldstorage.Inthedesign,mainlyforcompressorselection,andcooler,evaporatordesignchoices,andrefrigerantquantityestimationandauxiliaryequipmentselection.Smallcoldstorageforfreshagriculturalnonstaplefoodandbeveragerefrigerationprovidedaspace,tomeetthefreshfoodsinrefrigeratedtransportoffreshandfrozenrequirements.Improvethepeopleslivingstandard.KeywordColdStorageDesignRefrigeationSystemLoadCalculationSelectionCalculation西安文理学院本科毕业设计(论文)1目录第一章绪论.............................................................................................................................................................31.1选题的目的与意义............................................................................................................................................31.2冷库在国内外行业现状及存在的问题.............................................................................................................31.2.1国外冷库行业现状......................................................................................................................................31.2.2国内冷库行业现状......................................................................................................................................31.2.3目前主要存在的问题..................................................................................................................................41.3发展趋势.........................................................................................................................................................51.3.1建设规模......................................................................................................................................................51.3.2冷链物流......................................................................................................................................................51.3.3制冷设备......................................................................................................................................................61.3.4整体规划......................................................................................................................................................61.4本课题主要研究内容和设计任务................................................................................................................6第二章工程概况与原始资料...............................................................................................................................72.1工程概况............................................................................................................................................................72.1.1冻结间、冻结物冷藏间..............................................................................................................................72.1.2室内计算参数..............................................................................................................................................72.2气象情况.............................................................................................................................................................72.2.1室外计算参数..............................................................................................................................................72.2.2室内计算参数..............................................................................................................................................7第三章冷库隔热防潮设计.....................................................................................................................................83.1冷库的结构.........................................................................................................................................................83.2隔热与防潮的基本要求.....................................................................................................................................83.2.1土建冷库的隔热、防潮..............................................................................................................................83.2.2装配式冷库的隔热、防潮..........................................................................................................................83.3维护结构的材料及选择.....................................................................................................................................93.3.1冷库围护结构用隔热材料及选择..............................................................................................................93.3.2冷库围护结构用防潮材料及选择..............................................................................................................93.3.3冷库外墙、屋顶、地面保温层结构..........................................................................................................9第四章冷负荷计算.............................................................................................................................................114.1计算各面传热层系数.......................................................................................................................................114.1.1冻结间........................................................................................................................................................114.1.2冻结物冷藏间............................................................................................................................................114.2设备负荷计算...................................................................................................................................................124.2.1冻结间和冻结物冷藏间的冷负荷计算....................................................................................................124.2.2围护结构传热量Q1..............................................................................................................................124.3设备负荷汇总...................................................................................................................................................164.3.1设备负荷....................................................................................................................................................164.3.2系统机械负荷计算....................................................................................................................................16第五章制冷系统方案的确定.............................................................................................................................175.1确定制冷系统方案的依据...............................................................................................................................175.2确定制冷方案的原则.......................................................................................................................................17西安文理学院本科毕业设计(论文)25.3确定制冷系统方案的内容...............................................................................................................................17第六章制冷机及辅助设备的选择.....................................................................................................................196.1制冷压缩机的选型计算...................................................................................................................................196.1.1压缩机选择................................................................................................................................................196.1.2制冷系统辅助设备选型计算....................................................................................................................19第七章制冷系统管道设计...................................................................................................................................267.1系统管道和阀门的设计要求...........................................................................................................................267.2管道流速要求...............................................................................................................................................267.3蒸发器供液管的设计.......................................................................................................................................267.4吸气管道的设计...............................................................................................................................................267.5排气管的设计...................................................................................................................................................277.6其它管道的设计...............................................................................................................................................277.7对制冷工艺管道布置要求...............................................................................................................................27第八章制冷系统的试压试漏及管道保温.........................................................................................................288.1系统试压、排污、试漏、抽真空...................................................................................................................288.1.1系统试压....................................................................................................................................................288.1.2系统排污....................................................................................................................................................288.1.3系统抽真空实验........................................................................................................................................288.1.4系统氨试漏................................................................................................................................................298.2系统设备及管道保温.......................................................................................................................................29第九章结论...........................................................................................................................................................30致谢.........................................................................................................................................................................31参考文献.................................................................................................................................................................31

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