H.Stars Variable-frequency Speed Drive Chiller

Functionsand features of variable-frequency chillers

Frequency conversion isa technology thatadjusts theworking load of equipment by changing the frequency of power supply,and consequently reduces power consumption and losses,and extends the service life of the unit.At the heart of the frequency conversion technology is the frequency converter, which changes the fixed grid frequencyof 5 0 H z to anyvariable frequencyranging from 30 to 1 3 0 mathsf { H z } and consequently realize automatic adjustment of the motor running speed.

Rotating speed of the compressor,which is the most important energy-consuming component of the unit,directlyaffects theunit's powerconsumption.A variable frequencyspeeddrivechiller that candirectly adjusts the compressor speed during partial load operation has higher energy efficiency than an ordinary unitthatcanonlyadjustworkingloadwithcapacity regulatingvalvebutcannotchangethemotorspeed. And since all units operate at partial load for more than 9 5 % of theirworking time,variable frequency speed drivechillers enable continuous energysaving,and their investment costs can be recovered in a relatively short time.

Variable frequencyspeed drivechillersadopt the built-in variable frequency drive technology，which combined with specially designed variable-frequency compressor,can greatly improves the unit's energy efficiencyduring partial load operation,achieving integrated part loadvalue (IPLV) as highas more than10.

Variable frequencyspeed drive chillersoffersoft start function to reduce the impact of starting current; thefrequencyconvertercomeswitha DC reactor that canminimizeharmonicinterference;andthereisalso anoptional low harmonic filter which,under the input powerof the frequencyconverter,isin linewith IEEE519 specification for harmonic distortion,and equipped with functions of harmonic filter over-temperature protection and capacitor switching.

Variable frequency speed drive chillers havea widerange ofapplications,and are diversifiedin product types,including variable-frequency centrifugal chillers,variable-frequencyscrewchillers,variablefrequency scroll chillers,variable-frequencyair conditioningchillers,variable-frequency industrial (integrated) chillers,variable-frequency hot water (high temperature large,scroll) chillersand manyothers.

Functionsand featuresof variable-frequencychillers

Avariable frequency speed drive chillernot only cansaveenergybyreducingthe frequency,butalso can configure the unit to work at load other than themaximumone.When thecoolingdemandisat themaximum level, the frequencywill be raised to increase thecoolingcapacityto fill thedemand gapof cooling capacity.

The most prominent feature of a variable frequency speeddrivechilleris the frequencyconverterthat is addedto drive the compressor;itsstartingcurrent is 6 0 % lower than that of thedriverof atraditionalunit.In addition to compressor control,convertible frequency technologycanalso beuse to control fans,and water pumps among others.

The frequency converter help the unit to achieve stepless load adjustment of 1Hzeach time;and its frequencyconversionrangeof 30-13oHZandadaptive control logic enable it to accurately control outletwater temperature toatoleranceof ± \ : 0 . 3 degrees,making it perfectlysuitable forscenariorequiring high-precision temperaturecontrol.

Variable-frequency Chillers (Water Cooled Series)

Variable-frequencycentrifugal chillers

Thewater-cooled variable-frequency centrifugal chillerappliesHanbellvariable-frequencycentrifugal compressor,proprietarilydevelopedandmanufactured high-efficiency heat exchanger,and precise liquid level control technology to ensure that the evaporatoris always ina high-efficiency heatexchangestate.

Thecondenser'sdroplet separation technologyensures efficientand sufficientheatexchange of the heat exchange tube of the condenser.The chiller hasan IPLV up to10.Chilled water outlet temperature range: 5 - 2 0 ^ { \circ } C ： Besides standard specifications,various non-standard chillers canalso be available by customization.

Compressor frequency range:30Hz-50Hz Compressor rated frequency:50Hz

Variable-frequency screwchillers

The water-cooled variable frequencydrive screw chillerusestwin-screwcompressorspeciallydesigned forfrequencyconversion,whichiscompletedwith proprietarilyproduced high-efficiency condenserand evaporator,and branded expansionvalve.Applications of thechiller:various largeand medium-sized industrial and commercial placeswhere air-conditioningand cooling isneeded,aswellas industrial places forchemical, pharmaceutical,industrial processing,food processing and others.

Chilledwateroutlettemperature 5 9 \mathtt { C } - 2 0 9 0 ; cooledwater temperature range 1 5 ^ { \circ } \mathsf { C } \mathsf { - } 4 0 ^ { \circ } \mathsf { C } .Compressor frequency range: 2 0 H z - 8 0 H z Compressorrated frequency: 6 5 H z 业 Contact the manufacturer if operation at higher frequency isneeded.

Variable-frequency Chillers (Water Cooled Series)

Variable-frequencyscroll chillers

Thewater-cooledvariable-frequencyscrollchilleradopts branded compressor speciallydesigned for frequency conversionandbranded frequency converters,and is equippedwith high-efficiencyshell-and-tube condenser andevaporator.Itperformswithhighreliabilitythanks to its microcomputer control,and various protection functions.

Designed for comfortableair conditioning,theyare suitable for various commercial buildings,including hotels,shopping malls,and office buildings.The product isavailablein twoseries,WO open typeand WCcase type.

Compressor frequency range:20Hz-80Hz Compressor ratedfrequency:65Hz.Contact themanufacturer if operationat higher frequency isneeded.

Variable-frequency Chillers (Air Source Series)

Variable-frequencyairconditioningchillers

Theair-cooledvariable-frequencychillersuseenhanced air-cooled compressorspeciallydesigned for frequency conversion,and proprietarilydeveloped and produced high-efficiency condenserand evaporator,which endow the chillersan energy efficiencyof more than 3.2.The chillers are available in single-loopand double-loop designs tomeet different requirementsof customers. When one compressor ofa dual-loop chiller fails,the othercompressormayoperatenormallytominimize theimpact on thechillerin theevent ofa failure.Heat recoveryisoptional.Thechillersaresuitable forvarious commercial buildings,including hotels,shopping malls, and office buildings.

Compressor frequency range:20Hz-80Hz Compressor ratedfrequency: 6 5 H z .Contact themanufacturer if operationat higher frequency isneeded.

Variable-frequency industrialchillers

Variable-frequencyindustrial chillersareanintegrated productdesigned for industrialapplications.The chiller isanintegrationofvariable-frequencymainengine, chilled water storage tank,chilled water circulating pump, processpump,waterpipesystem,variousvalves,and engineering control cabinet.

Assembledintheproduction line,theyofferreliable quality,compact structure and high integration.Their installation is simple,and convenient,with reduced costs. Compressor frequency range:20Hz-80HzCompressor ratedfrequency:65Hz.Contactthemanufacturerif operationat higher frequency is needed.

Variable-frequency Chillers (Air Source Series)

Variable-frequencyhot waterchillers

Variable-frequency hotwaterchillers include two types of chillers:screw type and scroll type.Low quality heat energy collected fromambientair is transformed by theconvertible frequencychiller into high quality heat energy that canbe used to produce hot waterabove 50 degrees.The chillersare suitable for indoorswimming pools,hotels,villas,bathingand pedicure sites,factories, farms and other places that need hot water.

Withbuilt-in low temperature enhanced heat transfer technology,thechiller decreaseswith theambient temperature in heating volume but not much in temperature.Theycanalsoreplaceboilers.

Compressor frequencyrange:20Hz-80Hz Compressor rated frequency:65Hz.Contact the manufacturer if operationat higher frequency isneeded.

Water-cooled Centrifugal Variable Frequency ChillerTechnical Parameters

Water-cooled Scroll Variable Frequency Chiller Technical Parameters

Water-cooled Screw Variable Frequency ChillerTechnical Parameters

Air-source Screw Variable Frequency ChillerTechnical Parameters

Air-source Screw Variable Frequency Chiller Industrial Chiller Technical Parameters

Air-source Screw Variable Frequency Chiller Hot Water Unit Technical Parameters

H.Stars (Guangzhou) Refrigerating Equipment Group Ltd.

Address:No.1 Guoyuan 4th Road,Guangzhou Economic& Technological Development Zone,
HuangPu District,Guangzhou,China Zip Code 510530
Email:sales@hstars.com.cn
Tel:+862062266755 ext. 886
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