Structural analysis of cold storage and the design & selection of compressors

Summon:

    Structural analysis of cold storage and the design & selection of compressors

1. Type of the cold storage

According to temperature:

A.High temperature cold storage(±5℃): suitable for fresh fruit and vegetables

B.Middle temperature cold storage (－10℃~－5℃): suitable for frozen food refrigeration

C.Low temperature cold storage(－20℃~－10℃):suitable for frozen aquatic products, meat

D.Frozen cold storage(－23℃ below):suitable for quick freezing of fresh food before freezing

According to volume:

A.small cold storage:＜500M3

B.medium cold storage:500~1000M3

C.big cold storage:＞1000M3

Structure and main equipment of cold storage

1. Heat preservation material and moisture proof layer    

A.Library board: production in advance, has the fixed length, width and thickness, can choose according to the needs of library body installation. High and medium temperature cold storage generally selected 10cm thick plate, low temperature and freeze cold storage library generally choose 12 cm or 15 cm thick plate;

B.Polyurethane spray foam materials: the materials by directly spraying in the warehouse, form not bibulous, good polyurethane thermal insulation board, but the cost is higher.

C.Polystyrene fat spraying foam materials: the same material polystyrene resin plate, are formed by spraying water imbibition is strong, the polyurethane board thermal insulation is bad, but the cost is low.

D.Due to the heat insulation material moisture, heat insulation performance is reduced. Therefore, the insulation board should be both sides of the moisture barrier, can only do external moisture layer. Moistureproof layer is made of asphalt, linoleum, general plastic coating, plastic or metal plates.

2.Refrigeration systems

A.compressor (the most critical parts) : in general, small cold storage choose closed compressor,medium-sized cold storage choose semi-closed compressor,large cold storage choose semi-closed compressor.

B.Evaporator: under normal circumstances, high temperature warehouse selection wind machine evaporator and its characteristics is the cooling speed is fast, but it is likely to cause cold products of water loss; Medium & low temperature cold storage selection of seamless steel tube is made of evaporation row tube based,  its characteristics is good thermostatic effect, and can timely storage.

C.Condenser, the condenser with air cooling and water cooling and air and water cooling way. Air cooling is limited to application in the small cold storage equipment, water cooling condenser can be used for all types of refrigeration system.

D.Other parts: temperature control machine, door lock, hinge, handle etc.

Cold storage construction guide

1.According to their own uses and requirements, choose the right volume and temperature range of cold storage.

2.To understand the performance of main materials, accessories, do know the score.

3.Shop around, choose good quality, price is more excellent business; Especially choose a shop with good credit, to purchasing network time can refer to the corresponding credit index.

4.Choose the engineering contractor with experience in construction.

Design and selection of compressor unit for activity cold storage

    No matter what brand of compressor selection,are determined according to the activities of cold storage evaporation temperature and cold storage effective working volume, also reference the condensing temperature of the frozen or refrigerated goods, storage capacity, import library frequency etc. parameters. Usually high temperature activity of cold storage refrigeration quantity is calculated as: cold storage volume x 90 x 1.16+ positive deviation, positive deviation according to the condensing temperature of frozen or refrigerated items, storage volume, import and base frequency determined, the range between the 100-400W; temperature cold storage refrigeration capacity calculation formula is: cold storage volume x 95 * 1.16+ positive deviation, positive deviation range between the 200-600W; low temperature cold storage compression refrigerating capacity calculation formula is: cold storage capacity * 110 * 2 + positive deviation, deviation is in the range of 300-800W between.

Tags:cold storage,structural analysis,design,selection,compressor