SHANGHAI VENTTECH REFRIGERATION
EQUIPMENT CO.,LTD.

EN

Water Cooled Centrifugal Chiller

Home  >  Products  >  Chillers  >  Water Cooled Centrifugal Chiller  >  Water Cooled Centrifugal Chiller

Products

Hot Product

Water Cooled Centrifugal Chiller
description1
Zipper closure 1/5 zip athletic pullovers for men. Stretchy, lightweight, fast-drying fabric for superior performance. REGULAR FIT - US standard sizes. An athletic fit that sits close to the body for a wide range of motion, designed for optimal performance and all day comfort. FEATURES - Quarter zip closure;Thumbholes on long sleeves to keep them in place during workout
Features
Products features
1.R134a, a HFC refrigerant, recognized as a environment-friendly refrigerant internationally, is adopted by Venttech chiller.
2.R134a is a positive pressure refrigerant, non-essential for discharge device. The ventilation design of motor room becomes simple.
3.Hanbell's two stage centrifugal compressor is adopted by Venttech chiller unit.
4.High efficient falling film evaporator(spray style) is adopted.
5.Unit has built-in oil cooler, cooled by the refrigerant, and free of maintenance.
6.Independent oil reclaim system (jet pump) is adopted to ensure oil recovery in time in any load conditions.
7.Oil pump is built in the compressor oil tank, away from oil leakage.
8.Adopt fixed orifice plate throttling device, without moving parts, which can adjust refrigerant flow in variable load and conditions without hysteresis to ensure unit stable operation.
9.It is convenient to operate on microcomputer control system, displaying all the working data clearly. Chinese/English can be selected.

 

High reliability

1.Professional design
Hanbell has accumulated compressor manufacturing experience for many years, and import scientific research achievements of Taiwan scientific research institutions-the Industrial Technology Research Institute and the united states professional centrifugal consultant firm NREC, officially launched c-series centrifugal compressor in 2008 Shanghai Refrigeration Exhibition.

 

2.Reliable oil reclaim device-ejector pump

The ejector pump is used to recovery oil in low pressure side by medium pressure flash gas, without energy loss on Venttech water chiller.

 

3.Control components of refrigerant flow -orifice plate.

(1). Orifice plate is adopted as the refrigerant flow control device. Each orifice plate is designed in accordance with the unit’s performance and reaches the most match of the unit.
(2).2-3 orifice plates are adopted as a set of throttling device. The first one is used as liquid seal and the rest are used to throttle and pressure drop, in order to adjust the refrigerant flow that the evaporator required, by the dynamic balance of refrigerant itself at full load, partial load and different conditions.
(3).As there are no moving parts of the orifice plate, its reliability is much better than all kinds of throttling valves of mechanical transmission.
When full load operation, liquid column height is H, and the static pressure generated by liquid column will deliver refrigerant required from the first orifice plate to the second one. 
When half load operation, liquid column height is H/4, and the when refrigerant through the first orifice plate becomes half because of insufficient static pressure. There is flash phenomenon between two orifice plates generated by the up steam flow reduction. The refrigerant flow will decrease by half as liquid refrigerant mixed with large amount of flashing gas through the second orifice plate together.

 

High efficient and energy saving.

1.Centrifugal compressor.
Centrifugal compressor has two stages, with high strength alloy spindle, aluminum alloy material hermetic impeller and high precision gears internally. The bearing is not the plain one but the roller bearing, therefore it does not matter if the compressor emergency stops. Meanwhile, the startup interval can be shortened to 10 minutes, and the life of the bearing can be over 80000 hours.

 

2.High efficient condenser.

The condenser is divided into two parts-the up one and the low one by the air deflector which can divert the liquid refrigerant to the edge of the shell, so as to greatly improve the of heat exchange efficiency of the lower layer tube and reduce the condensation temperature by 0.5-1℃.This design is very efficient for large capacity unit.

Compressor discharge

Economizer

 

3.Spray type (falling film) evaporator

(1).The liquid refrigerant, running into the evaporator, sprays on the heat exchange tube array from top to bottom. Because the liquid refrigerant forms a thin film on the tube wall and falls downward, the evaporator is also known as falling film one. As it is covered with a layer of liquid refrigerant film on the surface of the heat exchanger tube, the heat transfer efficiency is excellent.
(2)There is only little liquid refrigerant in the bottom of the evaporator so that the refrigerant charge is low, which can meet the requirements of environmental protection.
(3)The lubrication oil concentrates in the bottom of the evaporator after a large amount of refrigerant evaporation. The oil can be extracted by the oil reclaim pump successfully and turn back to the oil tank.

 

4.Economizer, oil cooler and oil reclaim heat exchanger

(1)Application of the combination of economizer, oil cooler and oil heat exchanger technology can improve the medium pressure saturated flashing gas and liquid refrigerant to separate effectively in the economizer. The medium pressure saturated flashing gas after separation will be injected into the compressor to complete the two-stage compression.
(2)The oil rich liquid refrigerant from the evaporator is heated into the refrigerant vapor and oil, and then turns back to the oil tank.
(3)The high temperature oil from the compressor enters into the economizer first to be cooled to proper temperature, and then injected into the compressor parts that need to lubricate.

 

5.Heat recover device

Heat recovery unit with specially designed heat recovery device can effectively heat the service water or the water during the production process. It can not only achieve the waste heat utilization to reduce the heat pollution of condensation to the environment, but also decrease the operation cost and noise of the cooling tower.

 

Advanced Control

1.Microcomputer controller
Our centrifugal chillers are equipped with advanced microcomputer controller and adopt the core components of double CPU, with 0.25ms operation speed while executing 1K words program, to ensure the unit stable operation

 

2.Man-machine interface

The touch screen with storage space has high reaction speed. So users can grasp the integrated running states in time. Intuitive operation picture with the language selection of English and Chinese, all you have to do is to click on the menu so that operate and set the unit.

 

3.PID control function

Microcomputer controller adopts advanced PID control function, adjusting the unit load automatically according to the integer of the cold water outlet temperature and target temperature to meet the requirements in the shortest time; and making the water outlet temperature stable within +-0.2℃ of the target temperature.

 

4.Unit protection function

Provide protection of over voltage, under voltage, three phase unbalance and anti-phase lack for user’s unit power. Besides, there are more than 30 kinds of protecting functions.

 

5.Multiple anti-surge functions

Unit has advanced multi anti-surge function, with the combination methods of prevention, control and alarm, to enable the unit to meet the customer’s demand of refrigerating capacity in the safe operating range.
(1)Prevention:  the unit will adjust state automatically when the running condition approximately approaches the surge line through accurate calculation of surge curve.
(2)Control: the unit will adjust running status timely when surge occurs, making control of surge effectively.
(3)Alarm: if unit surge lasts for a period of time, it will alert to remind customers and execute the stop operation.

 

6.Reserve connection points for users

(1)Reserve the control points of the fan of cooling tower, cooling water pump and chilling water pump for users, and make the fan and water pump controlled by the unit, optimizing the organization of the customer’s system.
(2)Unit reserves alarm output points for remote alarm display.
(3)Also reserves central monitoring connection points (RS-485 interface), to enable the unit to be connected seamlessly to the building monitoring system.

 

Downloads

Related Products

CONTACT
US