A customer has a demand for two refrigerated warehouses, respectively, 7848 cubic and 5840 cubic. Temperature required 0-5 degrees, according to the calculation, we selected the mechanical load of the outer machine 290KW,
7848 cubic equipment load 196KW, 5840 cubic equipment load 146KW.
This is 2 logistics warehouse, choose 3 * 70HP screw unit is more appropriate, Beijing bizel screw compressor is domestic refrigeration field first-line compressor brand, cost-effective, stable and reliable. According to the type selection software of the cold storage, (according to the mechanical load calculated by the cold storage, the evaporating temperature is minus 5 degrees, the condensing temperature is 40 degrees, the high temperature unit is selected 3 * 70HP Screw Unit Module 1 set, the condenser is installed separately, the evaporating condenser is 1332KW) , in order to make the air distribution in the cold storage uniform, 1 screw parallel unit is selected to tow 2 cold storages, each cold storage has 4 cold fans, the air-tube type air-cooler with a range of 25 meters (according to the load of the cold storage calculated, the evaporation temperature is minus 5 degrees, the condensation temperature is 40 degrees, the distance between sheets is 4.5 mm, the hot gas defrosting) is selected, and the starting and stopping of the screw unit is controlled by the pressure, the unit has its own control box.
There are four air coolers in a cold storage at the end. In order to consider the reason of defrosting. the solution of the end air coolers is to use PLC programming. which can control the start and stop of four groups of air coolers in No. 1 cold storage according to the temperature of No. 1 cold storage. control the defrosting time and frequency of four groups of air coolers, and control the start and stop of four groups of air coolers in No. 2 cold storage according to the temperature of No. 2 cold storage, The defrosting time and frequency of four groups of cooling fans were controlled respectively.
Type selection scheme
This customer is an owner, after many comparison, finally choose our program, after our recommended installation business site installation, our engineers on-site debugging guidance, from the normal temperature 25 degrees down to 0 degrees shutdown, as long as 1 hour and 20 minutes, high pressure 15KG, low pressure 3KG, remote monitoring and testing machine is normal, customers are very satisfied.