共查询到19条相似文献,搜索用时 125 毫秒
1.
2.
冷库节能主要是节电,据统计,冷库制冷动力设备所消耗的电能约占冷库运行总能耗的95%以上。因此,冷库节电除了要合理选配电动机之外,提高冷库用电功率因数是一条重要途径。目前冷库企业普遍采用静电电容器低压集中成组补偿节电技术,据了解,冷库采用的电容补偿装置及其投切方 相似文献
3.
本文分析中国水产冷库经过了小型水产冷库蓬勃发展和冷库容量快速增加的发展过程,冷库总量己超过300万吨,占全国冷库总量的1/3。本文指出,由于大型水产批发市场已经成为水产品低温物流的重要节点,所以一批为市场服务的大中型水产冷库必然会建在市场的周围,形成水产冷库集聚区。冷库集聚而建,能够降低冷库建设和管理成本,提高冷库的管理水平,达到安全、节能和高效的目标。今年出台的国家“物流业调整和振兴规划”中,已经将“物流园区”的建设列为重点工程。这将使水产冷库集聚区的发展加速。 相似文献
4.
5.
冷冻食品在低温冷库中贮藏是食品冷链中的重要环节,低温冷库的库温不均匀度、库温波动对货品品质有非常重要的影响。在保证正确的库温、合理的库内温度不均匀度和库温波动范围的前提下,对冷库能耗进行评价才有意义。制订低温冷库温度要求和对低温冷库的能效进行分级,将在规范低温冷库的设计和建设,提高冷库的货品品质,保证食品安全,降低冷库能耗,提高冷库的综合效益等方面发挥积极的作用。 相似文献
6.
7.
8.
目前,欧美等发达国家采用氨为制冷剂的冷库(以下简称冷库)自动化控制程度很高,已经接近100%,而我国冷库的自动化控制程度却相对较低,部分的具有自动控制功能的冷库也仅处于半自动控制的运行状态。本文通过对目前国内冷库自动化控制使用现状的介绍,和对现阶段冷库自动化控制系统中容易失控的环节的分析,简要总结了冷库自动控制系统无法正常运行的主要原因。 相似文献
9.
由于冷链物流的快速发展,我国冷库建设水平也不断提高,冷库建设规模日益扩大,特别是近年来各种大型冷库、多层冷库、高货架冷库相继建成,冷链物流行业发生了巨大的变化。冷库建设中的防火、安全和环保问题十分重要。在冷库规划设计中,采用积极有效的防火、安全和防护措施,保证氨系统安全和无故障运行,保护人身安全,保护环境,充分体现以人为本的宗旨。本文系统论述了当前冷库建设中防火、安全和环保问题及采取的应对措施和做法,对国外冷库防火、安全和环保的状况也作出了介绍。 相似文献
10.
高架冷库的仓储分析 总被引:1,自引:0,他引:1
金熹 《制冷与空调(四川)》2018,(1)
介绍高架冷库的仓储特点,分析了高架冷库货物及包装,其多层托盘货架系统的选择和制冷系统工程建筑的选择,总结了高架冷库的仓储比较容易实现冷库的标准化、信息化管理,是国内商业物流冷库发展的一大趋势。 相似文献
11.
Concerns over environmental impact of heat pump cooling systems have led to a revival of solar ejector cooling systems. In order to achieve high solar fractions, the common approach is to increase the solar collector area. However, this is costly and does not provide cooling after sunset. This paper uses software modelling to examine the use of variable geometry ejectors and cold stores to increase the annual yield of an ejector system. The study concludes that a variable geometry ejector is able to increase yield by 8–13% compared to a fixed geometry ejector. However, a 46–50% increase in solar fraction is available if a 60 MJ cold store is included compared to a fixed geometry ejector without storage and up to 63% increase in solar fraction is available if a variable geometry ejector and 60 MJ cold store is used. Alternatively, the modelling shows how the solar collector area may be decreased if a cold store is used and this may benefit the capital and operating cost of the system. 相似文献
12.
13.
14.
15.
张华俊 《制冷空调与电力机械》2005,26(5):1-5
概述了食品贮藏保鲜基本原理,叙述了冷库的分类和组成,对冷库制冷系统进行了详细的分析;对冷冻冷藏中的几个问题进行了讨论,为进一步应用打下了基础. 相似文献
16.
Steady state CFD modeling of airflow, heat transfer and moisture loss in a commercial potato cold store 总被引:4,自引:0,他引:4
Storage loss beyond permissible limit is one of the most important problems in Indian potato cold stores, which has been hindering further growth of this industry. The losses in the stored potatoes have a direct relation to the intricate coupled transport phenomena of heat, mass and momentum transfer therein. Therefore, airflow, heat transfer and moisture loss was investigated in a potato cold store of commercial scale under steady state condition using the computational fluid dynamics technique. The developed CFD model was a two-dimensional simplification of the cold store. Heat and mass transfer at the cooling coils were not modeled, instead temperature and relative humidity in the air space were specified based on measured values. The model was validated in a commercial scale cold store and was found to be capable of predicting the air velocity as well as product temperature with an average accuracy of 19.5% and 0.5 °C, respectively and also the simulated average total moisture loss was found to be only 0.61% water (w.b.) higher than the experimental one for a storage period of 6 months. The main deficiencies of the airflow pattern which resulted in wide variations in temperature and moisture loss within the stored commodity can be investigated. The model located the probable zones of hot and cold spots, excessive product dehydration and moisture condensation within the storage facility, which might lead to qualitative and quantitative deterioration in stored product. This modeling tool could very well be applied to incorporate necessary design improvements with a view to improve the airflow distribution and heat transfer in order to limit the storage losses within the permissible limit. 相似文献
17.
18.
盛璞琳 《制冷与空调(北京)》2003,3(3):33-38
冷库是冷链体系的关键设备之一,其设计技术的优劣,将直接关系到冷库的初期建设总投资、后期冷库的运行费用、管理费用等一系列重要的经济指标;在一定程度上决定了冷库在食品的加工、存储过程中的经济效益。本文通过对冷库的计算机优化设计结果和工程实例进行对比分析,证明了最优化设计在冷库设计中的可行性,并得出了一些对工程设计具有指导意义的结论和图表。 相似文献
19.
张伟 《制冷与空调(北京)》2013,(6):5-8
充分发挥自动化冷库自控平台的基本功能和生产控制的优化策略,并通过对其丰富数据的深度挖掘,使自动化冷库自控真正成为提高效率和节能降耗的重要手段。 相似文献