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冷库制冷机组配置存在的最大问题是设计冷量与热负荷不相匹配,制冷机组长期处于小于设计负荷运行状态下,造成冷库能耗增加。针对这一问题,提出热负荷分开配置机组的冷库制冷系统设计方案,以含有8个同温冷间的装配式冷库为例,设计制冷系统和控制系统。冷库各冷间采用分时进货方式,进货时间间隔取3小时,总共配置两套压缩冷凝机组,对于不进货、无操作人员工作的冷间使用一套压缩冷凝机组维持冷间温度,压缩冷凝机组按冷库总降温概率进行配置;对于正在进货、有操作人员工作的的冷间,使用另一套压缩冷凝机组快速降温,压缩冷凝机组按一个冷间所有的热负荷进行配置。结果表明:两套压缩冷凝机组配置的总制冷量比最大负荷法配置的制冷量减少1/4左右,同时缩短货物热量和开门热量冷却时间,提高了冷藏食品品质。
The biggest problem existing in the configuration of cold storage refrigeration unit is that the designed cooling capacity does not match with the thermal load, and the refrigeration unit is under a condition that the refrigeration unit is under the condition of less than the designed load for a long time, resulting in an increase of the energy consumption of the cold storage. In view of this problem, the design scheme of cold storage refrigeration system with heat load and separate configuration unit is put forward, and the refrigeration system and control system are designed with 8 cold storage buildings with same temperature and cold. Refrigeration cold room using time-sharing purchase method, the purchase time interval of 3 hours, a total of two sets of compression condensing unit, for non-stocking, no operator work cold use of a set of compressed condensing unit to maintain the cold temperature, condensing unit According to the total cooling probability of cold storage configuration; for the purchase, there is the cold work of the operator, the use of another set of compression condensing unit to cool down quickly, the condensing unit according to a cold all the heat load configuration. The results show that the total refrigeration capacity of the two compression condensing units is reduced by about 1/4 than the cooling capacity of the maximum load distribution, meanwhile reducing the heat of goods and cooling time for opening the door, and improve the quality of the refrigerated food.