CN110595135A - 一种以光伏发电给制冷机供电的具有蓄冷功能的冷藏库 - Google Patents
一种以光伏发电给制冷机供电的具有蓄冷功能的冷藏库 Download PDFInfo
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Abstract
一种以光伏发电给制冷机供电的具有蓄冷功能的冷藏库,包括光伏发电板、小型制冷机、冷藏库外围护墙、内保温板、相变蓄能板;冷藏库外围护墙上部具有光伏发电板,冷藏库外围护墙一侧具有小型制冷机,冷藏库外围护墙内部连接内保温板,所述内保温板连接相变蓄能板,所述相变蓄能板具有多个,光伏发电板通过电线与小型制冷机连接,小型制冷机通过管道与冷藏库内各个相变蓄能板内的换热铜管并联连接,小型制冷机内产生的冷量以制冷剂为载体,分别流过相变蓄能板内的换热铜管后再流回小型制冷机;所述相变蓄能板由2mm厚的金属铁板焊接而成的封闭腔体,所述相变蓄能板内均匀布置换热铜管。
Description
技术领域
本发明涉及光伏发电及相变蓄能领域,具体涉及一种以光伏发电给制冷机供电,低温相变材料蓄冷的冷藏库。
背景技术
冷藏库是利用降温设施创造适宜的湿度和低温条件的仓库,又称冷库,是加工、贮存农畜产品的场所。在我国农村,有不少养殖户因为养殖量过大,收购者打压价格或者其他因素导致价格过低,只好低价抛售。这样导致农村养殖户这一年可能就白辛苦了,因此在农场建冷库后,可以将农产品和畜禽产品放入冷库里冷藏,比如农村里的瓜果蔬菜和猪肉、鸡肉、鹅肉、鸭肉等,凡是可以放入冷库里冷藏的东西都可以放入冷库里进行冷藏,等到价格回升的时候再将收购的蔬菜拿出来销售。但现在国内冷藏库设备技术落后,管理粗放。国内冷藏库的兴建高潮在20世纪80年代,但在此期间修建的冷藏库普遍存在自动化程度低、设备技术陈旧、能耗高效率低。管理上更由于受多年的国有体制影响,加上长期低廉的能源价格,使得企业管理粗放,多数冷藏库都没有能源消耗检测仪表,没有建立能源台账,以至许多企业能耗占成本费的30%以上。而且现在国内大多数的冷藏室不具有蓄冷能力,一旦处于长时间的停电状况,冷藏室内温度就无法一直保持下去,容易引起内部所储藏食物的腐坏变质。因此,对于一些偏远的农村地区来说,电价贵,运行成本高,时长停电,就限制了冷藏库在农村的使用。
发明内容
针对现有技术存在的不足,本发明的目的在于提供一种采用光伏发电制冷,低温相变材料蓄冷,即使在停电的时候,也可以维持室内温度的冷藏库。
本发明解决所述技术问题的技术方案是,该冷藏库通过在白天采用光伏发电技术为制冷机供电,在冷藏库内部墙壁和内部屋顶安装有相变蓄能板,相变蓄能板内填充有低温相变材料,低温相变材料为月桂酸与正辛酸混合溶液,同时布置有换热铜管,换热铜管里走制冷剂,制冷剂通过换热铜管与相变材料进行换热,相变材料里的冷量再释放到冷藏库内;在夜间或停电期间,制冷机停止工作,不再为冷藏库内提供冷量,冷藏库内的相变蓄能板内的相变材料开始向室内释放白天储存的冷量,维持室内温度没有太大的波动。
进一步地,所述冷藏库与相变蓄能板之间布置有内保温板,内保温板采用聚苯乙烯板,聚苯乙烯板轻质,保温性好,方便布置;
进一步地,所述相变蓄能板由金属铁板焊接而成,铁板的导热系数高,放热性好,可加快冷量的释放;
进一步地,所述相变蓄能板内选用低温相变材料为月桂酸与正辛酸混合溶液相变温度为5℃~10℃的低温相变材料;
进一步地,所述相变蓄能板内均匀布置有换热铜管,换热铜管内走制冷剂;
进一步地,所述制冷机与冷藏库内的各个相变蓄能板内的换热铜管采用并联方式连接,使冷量更均匀地分布到各个相变蓄能板内;
进一步地,所述相变蓄能板上设计有相变材料进料口,方便相变材料的灌装。
有益效果
与现有技术相比,本发明有益效果在于:
1、与传统冷藏室相比,本发明的冷藏室在白天通过光伏发电技术为制冷机供电,不受停电的影响。
2、采用可再生能源太阳能发电,具有很好的节能性,降低了运行成本,同时降低了能耗,绿色环保。
3、该发明的冷藏室内部的屋顶和墙壁布置有相变蓄能板,板内填充有相变温度在5℃~10℃的低温相变材料,低温相变材料为月桂酸与正辛酸混合溶液,在白天,制冷机产生的冷量首先储存在低温相变材料内,多余的冷量再释放到室内;当夜间或停电期间,制冷机不在工作的时候,低温相变材料释放在白天储存的冷量,使冷藏室内的温度一直维持不变。
4、冷量通过相变蓄能板传入到室内,增大了换热面积,提高了换热效率,使室内的温度冷却地更快,冷量分布地更加均匀。
附图说明
图1是本发明一种实施例的整体结构主视示意图;
图2是本发明一种实施例的相变蓄能板的结构主视示意图;
图3是本发明一种实施例的相变蓄能板的左视示意图;
图中:1、光伏板;2、制冷机;3、外墙体;4、聚苯乙烯板;5、相变蓄能板;6、进料口;7、换热铜管。
具体实施方式
下面给出本发明的具体实施例。具体实施例仅用于进一步详细说明本发明,不限制本申请权利要求的保护范围。
实施例1
一种以光伏发电给制冷机供电的具有蓄冷功能的冷藏库,包括光伏发电板1、小型制冷机2、冷藏库外围护墙3、内保温板4、相变蓄能板5;冷藏库外围护墙上部具有光伏发电板1,冷藏库外围护墙一侧具有小型制冷机2,冷藏库外围护墙内部连接内保温板4,所述内保温板4连接相变蓄能板5,所述相变蓄能板5具有多个,光伏发电板1通过电线与小型制冷机2连接,小型制冷机2通过管道与冷藏库内各个相变蓄能板5内的换热铜管7并联连接,小型制冷机2内产生的冷量以制冷剂为载体,分别流过相变蓄能板5内的换热铜管7后再流回小型制冷机2;所述相变蓄能板5由2mm厚的金属铁板焊接而成的封闭腔体,所述相变蓄能板5内均匀布置换热铜管7,换热铜管7采用壁厚为1mm,直径为20mm的铜管制成,相变蓄能板5上具有进料口6,所述相变蓄能板5封闭腔体内具有相变材料,所述相变材料为月桂酸与正辛酸混合溶液。
所述内保温板4采用厚度为30mm的聚苯乙烯板,导热系数为0.08 W/m·K,聚苯乙烯板完全覆盖住冷藏库内部的墙壁、屋顶和地面;所述相变蓄能板5完全覆盖住冷藏库内部墙体和屋顶的内保温板4表面。
所述相变蓄能板5厚度为50mm。
实施例2
本发明提供了一种以光伏发电给制冷机供电的具有蓄冷功能的冷藏库(简称冷藏库,参见图1),其特征在于该冷藏库包括光伏发电板1、小型制冷机2、冷藏库外围护墙3、内保温板4和相变蓄能板5;光伏发电板1通过电线与小型制冷机2连接,小型制冷机2通过管道与冷藏库内各个相变蓄能板5内换热铜管7并联连接,小型制冷机2内产生的冷量以制冷剂为载体,分别流过冷藏室内部墙体和屋顶布置的各个相变蓄能板5内的换热铜管7后再流回小型制冷机2。
本发明的工作原理和流程是:在白天,光伏发电板1为小型制冷机2提供电能,电量通过电线传到小型制冷机2,小型制冷机2产生的冷量以制冷剂为载体,制冷剂从小型制冷机2出来,通过管道分别留到各个相变蓄能板5内的换热铜管7中,制冷剂通过相变蓄能板5内的换热铜管7与低温相变材料进行换热,然后低温相变材料再于冷藏库内的空气进行换热,向冷藏库释放冷量;在夜间,光伏发电板1停止工作,不再为小型制冷机2提供电量,小型制冷机2不在制冷,这时,当冷藏库内的温度高于低温相变材料的相变温度时,相变蓄能板5内的低温相变材料开始向冷藏库内释放冷量,来维持冷藏库内的温度不变。
进一步地,所述内保温板4采用厚度为30mm的聚苯乙烯板,导热系数为0.08 W/m·K,聚苯乙烯板完全覆盖住冷藏库内部的墙壁,屋顶和地面;
进一步地,所述相变蓄能板5由2mm厚的金属铁板焊接而成,整体厚度为50mm,铁板的导热系数为56.7W/m·K,相变蓄能板5完全覆盖住冷藏库内部墙体和屋顶的内保温板表面;
进一步地,所述相变蓄能板5内的相变材料选用月桂酸与正辛酸混合而成的相变温度在8.2℃低温相变材料;
进一步地,所述相变蓄能板5内均匀布置换热铜管7,换热铜管7采用壁厚为1mm,直径为20mm的铜管,相变蓄能板5上设计有相变材料进料口6,方便相变材料的灌装。
实施例3
本发明的工作原理和流程是:在白天停电期间,光伏板继续工作,不受停电影响,光伏发电板1跟踪太阳位置的变化而转动,同时为小型制冷机2提供电能,电量通过电线传到小型制冷机2,小型制冷机2产生的冷量以制冷剂为载体,制冷剂从小型制冷机2出来,通过管道分别留到各个相变蓄能板5内的换热铜管7中,制冷剂通过相变蓄能板5内的换热铜管7与低温相变材料进行换热,然后低温相变材料再于冷藏库内的空气进行换热,向冷藏库释放冷量;在夜间,光伏发电板1停止工作,不再为小型制冷机2提供电量,小型制冷机2不在制冷,这时,当冷藏库内的温度高于低温相变材料的相变温度时,相变蓄能板5内的低温相变材料开始向冷藏库内释放冷量,来维持冷藏库内的温度不变。
进一步地,所述内保温板4采用厚度为30mm的聚苯乙烯板,导热系数为0.08 W/m·K,聚苯乙烯板完全覆盖住冷藏库内部的墙壁,屋顶和地面;
进一步地,所述相变蓄能板5由2mm厚的金属铁板焊接而成,整体厚度为50mm,铁板的导热系数为56.7W/m·K,相变蓄能板5完全覆盖住冷藏库内部墙体和屋顶的内保温板表面;
进一步地,所述相变蓄能板5内的相变材料选用月桂酸与正辛酸混合而成的相变温度在8.2℃低温相变材料;
进一步地,所述相变蓄能板5内均匀布置换热铜管7,换热铜管7采用壁厚为1mm,直径为20mm的铜管,相变蓄能板5上设计有相变材料进料口6,方便相变材料的灌装。
Claims (3)
1.一种以光伏发电给制冷机供电的具有蓄冷功能的冷藏库,其特征是:包括光伏发电板、小型制冷机、冷藏库外围护墙、内保温板、相变蓄能板;冷藏库外围护墙上部具有光伏发电板,冷藏库外围护墙一侧具有小型制冷机,冷藏库外围护墙内部连接内保温板,所述内保温板连接相变蓄能板,所述相变蓄能板具有多个,光伏发电板通过电线与小型制冷机连接,小型制冷机通过管道与冷藏库内各个相变蓄能板内的换热铜管并联连接,小型制冷机内产生的冷量以制冷剂为载体,分别流过相变蓄能板内的换热铜管后再流回小型制冷机;所述相变蓄能板由2mm厚的金属铁板焊接而成的封闭腔体,所述相变蓄能板内均匀布置换热铜管,换热铜管采用壁厚为1mm,直径为20mm的铜管制成,相变蓄能板上具有进料口,所述相变蓄能板封闭腔体内具有相变材料,所述相变材料为月桂酸与正辛酸混合溶液。
2.根据权利要求1所述的一种以光伏发电给制冷机供电的具有蓄冷功能的冷藏库,其特征是: 所述内保温板采用厚度为30mm的聚苯乙烯板,导热系数为0.08 W/m·K,聚苯乙烯板完全覆盖住冷藏库内部的墙壁、屋顶和地面;所述相变蓄能板完全覆盖住冷藏库内部墙体和屋顶的内保温板表面。
3.根据权利要求2所述的一种以光伏发电给制冷机供电的具有蓄冷功能的冷藏库,其特征是:所述相变蓄能板厚度为50mm。
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