The condensing unit for cold room is one of the main heat exchange equipment in the refrigeration system of cold storage. Its function is to cool and condense the superheated steam of the high-temperature refrigerant discharged from the compressor of the assembled cold storage into the high-pressure liquid. The heat released by the refrigerant in the condenser is taken away by the cooling medium. According to the cooling medium, the assembled cold storage condenser is mainly divided into the air-cooled type and water-cooled type. A small cooling load is suitable for the refrigeration system of small movable cold storage.
The shell is a cylinder made of steel rolled and welded. The shell and tube condenser is divided into vertical and horizontal types. Vertical shell and tube condenser. Porous tube plates are welded at both ends of the cylinder, and heat transfer tubes are correspondingly arranged in the holes for cooling the refrigerant. It is characterized by a large structure, many consumables, low cooling water flow rate, easy scaling and large consumption of cooling water, which is suitable for areas with sufficient water source and low water hardness. The structure of horizontal shell and tube condenser is similar to that of vertical condenser. When the refrigerant is ammonia, a seamless steel tube is used as a heat transfer tube, and when the refrigerant is freon, a low rib copper tube is used as a heat transfer tube. Horizontal shell and tube condenser has a higher heat transfer coefficient and less cooling water consumption, but it has higher requirements for water quality. It is widely used in ammonia and freon refrigeration systems of large, medium and small refrigerators.
Selection of condensing for cold room in cold storage
The selection of condensing for cold room can be configured according to the actual situation of cold storage engineering.
Air type cold storage condenser is the most widely used cold storage condenser at present. It has many advantages, such as simple structure, low price, few vulnerable parts, convenient installation, a wide range of use and so on. Air type cold storage condenser is generally applicable to small and medium-sized cold storage equipment. There are also use cases in large-scale cold storage projects in areas where water sources are exhausted.
Evaporative condenser is a kind of condenser which is widely used in large-scale cold storage projects in recent years. It is a product combining air-cooled condenser and a water-cooled condenser. This type of cold storage condenser is generally suitable for large-scale cold storage projects, especially in the northwest where the water source is relatively dry.
The condenser of water-cooled cold storage is common in large-scale cold storage projects. Using the condenser of water-cooled cold storage in large and medium-sized cold storage projects can effectively reduce the condensing pressure of cold storage equipment during operation. It greatly saves the energy consumption of compressor operation and greatly extends the service life of refrigerator equipment. At present, shell and tube type cold storage condenser is mostly used in domestic cold storage projects, and sleeve type cold storage condenser is generally suitable for small cold storage projects with the small cold field.