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Screw Chillers

Air Cooled Screw Chillers R134a

Blue Star, India's Largest central airconditioning company has been providing expert cooling solutions for over six decades. it has been manufacturing a wide range of chillers for over two decades. Drawing from this expertise, Blue Star presents a wide range of air cooled screw chillers with environment-friendly R134a refrigerant. These chillers are manufactured at Blue Star's own ISO 9001 certified factory with the chiller test bench certified by Airconditioning, Heating and Refrigeration Institute(AHRI). Blue Star screw chillers are equipped with effective capacity control, They provide excellent efficiency making them ideal for varying load applications such as office spaces, hotels, hospitals, malls and multiplexes.

Air Cooled Screw Chillers from Blue Star are available in two series:

Series Ⅰ: 375 to 635 KW (AHRI-certified series)-5 models in capacities of 375,525,555,625 & 635 KW. This series has been certified by AHRI.

Series Ⅱ:495 to 1395 KW - 9 models in capacities of 495,765,875,915,985,1055,1155,1255,1395 KW.

Compressor

Highly efficient and low noise levels. Due to few moving parts and slider valve, these compressors have minimal wear and tear, thereby, resulting in longer life of the compressor.

This compressor has stepless capacity control, from 25% to 100% making it suitable for varying load applications and efficient under part load conditions. The capacity control also helps in limiting the starting current and the loading is done steplessly. Due to its inherent characteristics, screw compressor has the highest volumetric efficiency and derating at higher temperature is negligible.

Each compressor has the latest 5 to 6 patented profile design with separate radial and axial force bearings, built-in oil separator, PTC motor winding protection,discharge temperature protection with its controller, oil level switch and oil differential pressure switch. This guarantees reliability and long life of bearings under heavy working operating conditions.

Economiser

Refrigerant liquid-to-liquid plate type heat exchanger is provided for the Economiser system. The liquid refrigerant is sub-cooled to enhance the capacity, thereby reducing specific power consumption (IKW/TR) and enhancing the Coefficient of Performance(COP).

Cooler

The shell and tube evaporator has been built using imported, internally enhanced and highly efficient finned copper tubes and has been optimised for refrigerant and water velocities. The expansion of the tube is done with torque controlled process.

Air Cooled Condenser

Fin and tube condensers are manufactured using Super Slit aluminum fins. The cooper tubes used are inner grooved type with higher height trapezoidal cross section to increase the internal surface area of heat transfer.

Hydrophobic coated fins can be manufactured as an optional feature which give corrosion resistance, typically 3 to 5 times more than the uncoated fins, depending upon the ambient conditions. The coated fins are tested for 500 hours of salt spray test.

Liquid Injection

The refrigerant suction gas cools the winding of the semi-hermetic screw compressor motor.During the part load operation where the suction gas circulation is less, as a precaution, liquid refrigerant is injected into the suction side of the compressor to cool the motor winding. This is done to keep the motor winding temperature within limits. it is provided as a standard feature to enhance the life of the compressor.

Fans

The chiller is incorporated with 5-lobe, bird-wing design fans. This profile optimises the noise level as well as power consumption against the required airflow and static pressure.

Spring Isolators

Specially designed spring isolators are supplied along with the units to minimise the transmission of vibration.

Acoustic Enclosure

An acoustic enclosure can be optionally provided for the compressor to reduce the noise levels.

Electronic Expansion Value

The units are incorporated with electronic expansion values for precise control of refrigerant flow through the cooler to accurately maintain the desired superheat. The expansion value is very sensitive to load variations and adjusts the flow of the refrigerent with short response times to achieve power savings. The microprocessor-based control panel provides the signals for accurate operation of the expansion value based on the superheat.

Microprocessor Control Panel

The cooler outlet temperature can be controlled accurately within a tolerance of ± 0.5℉.
In-built time delays for compressors and condender fans, single phase/phase reversal protection and anti-freeze protection.
Password protection at three levels.
RS 232 and RS 485 ports for remote connectivity,fault indication and status facility.
PC connectivity and remote monitoring without BMS through dedicated telephone line and optional gateway and modem.
BMS compatibility with Modbus RTU or Johnson N2 as a standard feature. Optional translators available for compatibility with BACnet IP or Modbus IP
Windows based support system provides complete staus on all operation both locally and remotely. History, static and dynamic graphing is standard to aid in commissioning, trouble shooting and evaluation.

Water Cooled Screw Chillers R134A

Blue Star, India's Largest central airconditioning company has been providing expert cooling solutions for over six decades. it has been manufacturing a wide range of screw, scroll and centrifugal chillers. Drawing from this expertise, Blue Star offers a wide range of water cooled Flooded and DX screw chillers with an environment-friendly R134a refrigerant. These chillers are manufactured at Blue Star's own ISO 9001 certified factory, with the chiller test bench certified by Airconditioning, Heating and Refrigeration Institute(AHRI). Blue Star screw chillers which are equipped with effective capacity control, provide excellent efficiency under part loads, making it ideal for varying load applications such as office spaces, hotels,hospitals,malls and multiplexes.
Blue Star offers Flooded as well as DX type Screw Chillers.

Flooded Chillers

Series Ⅰ: 385 to 660 KW-6 models in capacities of 385,470,535,570,625,660 KW.

Series Ⅱ: 705 to 1395 KW (AHRI certified series) - 14 models in capacities of 705, 730, 755, 775, 820, 845, 875, 930, 985, 1065, 1070, 1125, 1225 & 1395 KW.

DX Chillers

345 to 665 KW 5 models in capacities of 345, 385, 525, 525,665

Water Cooled Flooded type Screw Chiller features

• Highly energy efficient
• Economizer
• Microprocessor Controller

Water Cooled DX type Screw Chiller Features

• Microprocessor Control Panel
• Digital setting of temperature controls
• Built-in delays and safety

Common features for Water Cooled Flooded and DX Chillers

• Efficient Compressor
• High Efficiency Cooler
• Performance Optimising Condenser

Air Cooled and Water Cooled Screw Chillers R22

High on reliability. Low on operating cost.
Blue Star, India's preferred airconditioning company has been providing expert cooling solutions for over six decades. It is with this expertise Blue Star brings to you a wide range of air and water cooled Screw Chillers, manufactured at its ISO 9001 factory with world-class capabilities. These chillers which operate on HCFC-22 refrigerant come in a quality range of eleven models varying from 75 TR-366 in the air cooled version. The condensers are designed for operation under a wide range of ambient conditions. Due to lesser moving parts, these chillers are reliable and rugged. Further, with its automatic capacity control, it provides better efficiency under part loads making it ideal for varying load applications such as office spaces, hotels, hospitals, malls and multiplexes. In short, these chillers offers you reliable, energy efficient performance year after year.

Compressor


The BSC Series semi hermetic screw compressors incorporated in the chillers are manufactured by Handbell Precise Machinery Co. Ltd., Taiwan. Henbell follows state-of-the-art manufacturing processes which are ISO 9001 certified and use high precision machinery. Hanbell is one of the largest manufactures of such compressors and is widley used in chiilers in Europe including France, Germany and Italy.

The salient features of these compressors are:

• Highly efficient with low noise levels.
• Tested in accordance with ARI Standards.
• Due to few moving parts such as male & female screws and slider value, these compressors have minimal wear and tear.

• Each compressor has the latest 5 to 6 patented profile design, with separate radial and axial force bearing, built-in oil separator, PTC motor winding protection, discharge temperature protection with its controller, oil level switch and oil diffferential pressure switch. This guarantees reliability and long life of bearings under heavy working, operating conditions.

• Each compressor has capacity control from 25% to 100%, making it suitable for varying load applications and efficient under part load conditions. The capacity control also helps in limiting the starting current

Liquid Injection

The refrigerant suction gas cools the winding of the semi hermetic screw compressor motor. During part load operation where the suction gas circulation is less, as an abundant precaution, liquid refrigerant is injected to the suction side of the compressor to cool the motor winding temperature within limits. This is provided as a standard feature to enhance the life of the compressor.

Evaporator

The shell and tube evaporator has inner grooved copper tubes for better heat transfer. The tubes are designed to optimize for refrigerant and water velocities.

Control Centre

The control centre is mounted in the framework of the chiller. It is provided with an advanced microprocessor control panel which has unique features and advantages.

The cooler outlet temperature can be controlled accurately within a close tolerace of ± 0.5oF
In-built time delays for compressor single / phase reversal protection and anti freeze protection
Password protection at two levels.

Following features are available in Air Cooled Version:

Economiser

Refrigerant liquid to liquid plate type heat exchanger is provided for the economizer system. The liquid refrigerant is sub cooled to enhance the capacity therby reducing power consumbtion (IKW/TR) and enhancing the Coefficient of performance (COP).

Oil Cooler

Effective lubrication of bearing depends on the viscosity of lubricant,which in turn depends on the oil temperature. To ensure effective lubrication for longevity, oil cooler is provided as a standard option.

Air Cooled Condenser

The air cooled condenser coils uses copper tubes and aluminimum fans. The inner grooved type copper tubes used in the condenser provide increased surface area for better heat transfer. Hydrophobic coated aluminium fins and condender coil protection guards are available as optional items.

Water-cooled Screw Chiller with Falling Film Technology

For Nothing Less Than Super-Efficient Cooling.

Blue Star, India's leading airconditioning company, has been providing expert cooling solutions for over seven decades now. it has been a pioneer in manufacturing a wide range of screw, scroll and centrifugal chillers for various applications like green buildings, hospitals and hotels. With the growth of the Indian economy, there is a significant increase in deamnd for electrical energy. Since electrical energy is mostly sourced from coal-based power plants, which contribute to carbon emissions and global warming, there is an urgent need to reduce energy consumption and develop energy-efficent products.

As a leader in airconditioning, with a rich manufacturing experience of over 30 years in chillers, Blue Star has consistently developed energy-efficient chillers for the Indian market. The company's commitment to deliver a world-class customer experience motivates it to set high standards for its products. With this commitment, Blue Star has led the way in green building initiatives and devceloping eco-friendly and energy-efficient products. Now, Blue Star introduces the new generation, AHRI certified water-cooled Screw Chillers with Falling File Technology. These chillers are best-in-class energy-efficient screw chillers, optimised to deliver high efficiency both at full loads and part loads.


Enercy efficiency in chillers. The need of the hour.

The building sector represents about 33% of the total electricity consumption in India, with the commercial sector accounting for 8%. An energy code compliant building will normally consume 40% to 60% less energy than conventional buildings. Various government agencies have therefore established energy codes such as ASHRE 90.1 and ECBC to ensure that energy efficiency is enforced in buildings. High-performance buildings, such as green buildings, aim to exceed the energy efficiency standards specified in the above codes.

A chilled water system in a commercial building consumes as much as 30% to 35% of the toal energy. Which is why, buildings owners should choose the chiller care, so that the total lifecycle cost of the system is minimised. Operational costs are typically 10-15 times the capital costs of conventional chillers. Blue Star brings you its latest range of energy-efficient Screw Chillers that come with unparalleled energy and environmental benefits. The energy efficiency of these units can be as high as 5.0 COP in full load, and 8.25 COP in integratd part load value. This results in tremendous energy cost reduction and lower lifecycle costs compared to conventional Screw Chillers available in the market. Needless to say, these chillers exceed the energy-efficiency requiremnts of ASHARE 90.1 and ECBC.

Lifecycle cost for 5 years

Optimised to deliver high efficiency at both, part loads and high loads, these chillers present the ideal energy efficient solution for applications like commercial buildings,hospitals,hotels and malls. These chillers do not use Chlorrofluorocarbon(CFC) refrigerants. Instead they use R-134a, an environmentally friendly refrigerant. They also satisfy the requirements of fundamental as well as enhanced refrigerant management of green building design.

AHRI certified chillers

Blue Star Water-cooled Screw Chillers with Falling Film Technology are manufactured at Blue Star's own ISO 9001 certified factory. With the Chiller Test Bench certified by the Airconditioning, Heating and Refrigeration Institute (AHRI).

Features

• Efficient Compressor.
• Falling Film Evaporator
• Micro Controller
• Superior mechanical design enhances energy savings.

Other Advantages

• Address large capacity jobs without expensive redundancy chillers.
• AHRI Test Lab verified chillers ensure real world savings.
• Environmentally responsible design.
• Unmatchable part load performance.
• Robust service-friendly design.

Screw Chillers IOS

The Optimum Solution For Energy-Efficient Central Airconditioning.

Blue Star, India's largest central airconditioning company, has been providing expert cooling solutions for nearly seven decades now. Solutions that include a wide range of Screw, Scroll and Centrifugal Chillers, serving every conceivable need of the Industry.

Energy Efficient Solutions

Energy intense and special industrial applications depend on Chillers for precise control of process cooling. Along with Air Handling Units and Fan Coil Units, a Chiller provides the required conditions in typical work spaces. So when it comes to chilled water systems, there are different requirements and one size does not fit all. Blue Star has a comprehensive range of Chillers to meet every requirement, offering advanced technologies that optimise performance, whatever the environment.

With energy efficiency becoming the norm, Blue Star has introduced a range of Water-Cooled Flooded Chillers that use environmentally-friendly refrigerant R134a, offer effective capacity control, and provide excellent efficiency making them ideal for applications such as process applications, factories, and pharma applications. Blue Star's new range of Water-Cooled Flooded Screw Chillers with Integrated Oil Separator (the IOS series) offer excellent energy-efficiency under full load and optimum performance under part load conditions. Available in a wide range of models with capacities ranging from 100-313TR (353KW-1102KW), the IOS series Chillers offer great advantages as compared to regular Screw Chillers.

Features

• Superior full load performance
• Environmentally responsible design with low refrigerant charge.
• Intelligent low footprint, low weight, vertical stack design
• AHRI test lab verified Chillers,ensuring real world savings.
• Low condenser-entry water operations
• Superior oil management
• High quality twin screw compressor
• Robust and service-friendly design

Screw Chillers (IOS) Range Applications

Process-critical applications

Critical process applications like factories and pharma manufacturing applications offten need special attention for further cooling requirements as precise control of inside conditions is required for both temperature and humidity. Further, effective functioning of production equipment is critical and central to the success in manufacturing industry. A disruption to the production line can cause significant revenue loss. International standards, certifications and guidelines (FDA, ISO 14000) guide these manufacturing processes.

Choosing Chiller for such applications often requires extra care as the product has to be reliable and deliver robust performance over various operating ranges and should lend itself to various operating conditions that prevail during the year in various climatic zones. Blue Star's simple yet robust equipment, low refrigerant charge, and lower footprint backed by superior service make these Chillers ideally suited to meet most process critical applications. With lower condenser-entering temperature as low as 15°C, the Chillers can run throughout the year in most critical applications.

Solutions for Green Buildings

Green buildings have become the norm these days. The choice of heating, ventilating and airconditioning (HVAC) products in particular can have a significant impact on such high performance buildings, as the HVAC system directly impacts two categories that have a significant influence on the project getting certified. Blue Star IOS range of Screw Chillers can assist building owners to earn LEED points in the Energy & Atmosphere (EA) credit category and help address the following prerequisites and credit requirements.

EA prerequisite:Fundamental Refrigerant Management/
EA credit:Enhanced refrigerent Management

These Chillers use R134a which is an environmentally-friendly refrigerant and do not use chlorofluorocarbon (CFC) refrigerants, satisfying the requirements of Fundamental Refrigerant Management comply with the requirements of Enhanced Refrigerant Management credit.

Optimize energy performance

The Chillers selected for the project must meet the minimum energy performance to add to credits towards Green Building certification and reduce energy costs of the proposed building as compared to ASHRAE 90.1 code-compliant buildings. Blue Star's IOS Screw Chillers are designed for efficient full load and optimum part load performance and therefore are ideal fits in Green building designs. These Chillers exceed the energy-efficiency requirements of ASHRAE 90.1. Building simulation programs can help in estimating the savings possible using these Chillers.

Microprocessor Controller

The control panel of the Blue Star IOS series Screw Chillers is specially designed for this Chiller framework. The micro control parts and power section are separated in the control panel for ease of installation and servicing. The microprocessor control panel helps in controlling various Chiller operating parameters accurately.

Control panel features

• Trending facility to analyse Chiller operating data, maximizing energy savings, enhancing machine uptime.
• Dynamic data logging of readings (1020 sets of readings).
• Scheduling to facilitate auto operation.
• Graphic display,clear and simple language of information.
• Direct commnication through RS-485 to MODBUS.
• Storage of operating data for 99 trippings to facilitate trouble shooting.
• Remote monitoring of the Chiller as a standard feature.
• Option to upgrade the memory of controller up to 2 GB via flash card.
• Real-time clock with battery back-up for data in memory.
• Power supply:230V AC.
• BMS compatibility as a standard feature

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