shell tube heat exchanger as Flooded Evaporator in refrigeration system
Flooded Evaporator is a high eficiency part for the whole system ,Flooded screw water cooling chiller is advanced for big cooling capacity ,usually like in HVAC ,in central building cooling
Features:
The structure of Shell-tube heat exchanger is strong, we can choose a variety of materials in manufacturing, adaptability is extremely strong, especially widely used in high temperature, high pressure and large devices .
Typical Application
Evaporator in Screw chiller system
Dry shell and tube evaporators are mainly used in Freon refrigeration systems. The refrigerant liquid of this kind of evaporator goes on the tube side, so the refrigerant charge is less. Its structure is similar to that of the flooded evaporator, the difference is that a number of circular baffles with arcuate area cut off and arranged upside down are set on a plurality of horizontal smooth copper tubes. After throttling, the refrigerant liquid enters the tube side from the inlet below the end cover of one end of the evaporator. After absorbing heat in 2-4 processes, it is led out from the outlet above the end cover on the same side. The flow of refrigerant in the shell-and-tube type dry evaporator has different forms such as single-in and single-out, double-in and single-out, and double-in and double-out. The cooling tube is usually a copper tube with an outer diameter of 12-16mm. There are longitudinal fins in the tube. The mass flow rate in the tube is generally 180-200 kg/(nf-s), and the number of partitions should ensure that the coolant flows laterally. The speed of the tube cluster is 0.5—1.5 m/so
The advantages of dry evaporators are: ① less liquid filling, which is about 40% of the inner volume of the tube; ② less affected by the static pressure of the refrigerant liquid; ③ easy to drain oil; ; ⑤ The refrigerant level is easy to control; ⑥ The structure is compact; ⑦ The heat transfer coefficient is high. The disadvantage is that the liquid supply of the refrigerant in the tube group is not easy to be uniform, the manufacture and installation of the baffle plate is more troublesome, and between the tube hole and the tube of the baffle plate on the refrigerant side, and between the outer circumference of the baffle plate and the shell, leakage bypass flow is easy to occur. , thereby reducing the heat transfer effect.
Condenser in Screw chiller system
Shell and tube condenser is a kind of heat exchanger commonly used in chillers. Similar to shell and tube evaporator, shell and tube condenser is composed of shell, tube sheet, heat transfer tube bundle, cooling water distribution components (water cover or A closed water-cooled condenser composed of inlet and outlet pipe joints of cooling water and refrigerant.
The shell of the small condenser can choose thick seamless steel pipe. The shell of the large condenser is made of steel plate coil welding. Tube sheets are welded to both ends of the shell to form a complete shell. Many holes (tube holes) are processed on the tube plate. After the heat transfer tube bundle penetrates into the tube hole, both ends are connected to the tube plate by expansion or welding, and must have good air tightness.
Shell and tube condensers are mainly used in water-cooled chillers. According to the spatial orientation (vertical or horizontal) of the shell and the heat transfer tube bundle, the shell and tube condenser can be divided into two types: vertical and horizontal. But no matter which type it is, the cooling water goes on the tube side (inside the heat transfer tube bundle), and the refrigerant goes on the shell side (in the shell, the space outside the heat transfer tube bundle), that is, the high-temperature, high-pressure refrigerant vapor is in the The point where the outer surfaces of the heat transfer tubes cool, condense and converge to the shell. The reason for this arrangement of the process is because the average heat transfer coefficient between the cooling water and the tube bundle is generally higher than the average heat transfer coefficient of refrigerant vapor condensation, and condensation requires a larger heat exchange surface; The pressure of the high-pressure refrigerant vapor is controlled within a certain range, and a large space is also required.
GHE provide customers in HVAC and refrigeration industries with quality and stabilization shell tube evaporators ,we help customer to create value with our honest attitude and competitive price .
GHE provide customers in HVAC and refrigeration industries with quality and stabilization shell tube evaporators and condenser,we help customer to create value with our honest attitude and competitive price .
Flooded Evaporator Specifiation
The quality will be beyond your imagination
Market Areas
Our shell and tube heat exchaners is widely sold to most foreign countries like Australia,Spain ,Mexico ,Russia.most Europe,south America and Southeast Asia countries . major applications are for chillers,water heating and cooling, oil cooler,chemical industry,food process, etc
Our Services
1.Before Service: All the process of Technical Production deportment and Strict Quality Control System. We also can provide the sample for your test quality.
2.Middle Service: Any questions, pls feel free to contact us.
3.After Service: All the products problems, pls call us and E- mail us at any time, we will reply to you at the shortest time.
Payment Terms
1.We accept TT and L/C
Packaging & Shipping
Standard export packing .
Shipping Terms:
1.For the sample order: we also use International Express freight: Such as: DHL, TNT, EMS, UPS and so on.
2.For large quantity order, we will consider the Air or Sea Transport, all the detail terms we will discuss in the Contract.
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1000kw Shell Tube Heat Exchanger Brazed Flooded Evaporator In HVAC Screw Refrigeration Equipment Images
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