stulz cyber air 2 - whats new v1 (2) lewis
TRANSCRIPT
StulzStulz CyberAirCyberAir IIII
Whats New at Stulz
By Lewis Marton
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Starts of with their usual stuff Starts of with their usual stuff Starts of with their usual stuff
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Global Precision Cooling MeetingTognana, Italy May 15-17, 2007
Confidential
• CyberAir units offer the highest cooling capacities with the lowest footprint
• Latest EC fan technology
• Infinitely variable air volume
• Standby- Management
• Freecooling
• High optionality
CyberAir 2: established improved
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Global Precision Cooling MeetingTognana, Italy May 15-17, 2007
Confidential
• Stand alone intelligence per unit by C7000.
• Connection to BMS systems of well-established manufacturers
• Communication via internet protocols SNMP and HTTP
• SMS or email alarm messages via GSM modem
CyberAir 2: established improved
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Global Precision Cooling MeetingTognana, Italy May 15-17, 2007
Confidential
A-System G-System
ACW-System GCW-System
GE1-System GE2-System
CW-System CW2-System
CyberAir
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Global Precision Cooling MeetingTognana, Italy May 15-17, 2007
Confidential
A-System G-System
ACW-System GCW-System
GE-System
CW-System CW2-System
CyberAir 2
3
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Global Precision Cooling MeetingTognana, Italy May 15-17, 2007
Confidential
Refrigerant R410ARefrigerant R410ARefrigerant R410A
State-of-the-art refrigerantR410A
50% R32
50% R125
Advantages• Highest system performance• Refillable and service friendly two-component
refrigerant • Worldwide high availability
Disadvantage•High system pressure level
XXXX
RefrigerantsRefrigerantsRefrigerants
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Global Precision Cooling MeetingTognana, Italy May 15-17, 2007
Confidential
RefrigerantsRefrigerantsRefrigerants
For high temperature areas is only on choice: R134a
EU regulations are requiring replacement of R22The choice of replacement is R407C, R410A, or R134a
Stulz is using R407C as standard refrigerant since 2000
Extensive tests have shown that there are significant benefits with air conditioning systems using R410A
Stulz offers them all
Except when you order product they deliver units with R22
As an option or as an SFA
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Global Precision Cooling MeetingTognana, Italy May 15-17, 2007
Confidential
Refrigerant R407CRefrigerant R407CRefrigerant R407C
standard refrigerant since 2000
AdvantagesThe vapour pressure curve and the volumetricenthalpy of R407C are similar to those of R-22.-> R407C can be used in many instances with equipment originally designed for R-22.
R407C
52% R134a
25% R125
23% R32
Disadvantages• Any refrigerant loss will make it necessary to empty the installation and make a
complete refill -> capacity reduction up to 17%• Temperature glide
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Global Precision Cooling MeetingTognana, Italy May 15-17, 2007
Confidential
Refrigerant R134aRefrigerant R134aRefrigerant R134a
Refrigerant for extreme ambient temperatures
Advantages• No mixture of components• No Temperatureglide• Servicefriendly
DisadvantageReduction of cooling capacity has to be compensated by using bigger compressors
R134a
100% R134a
Also EER reduction
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Global Precision Cooling MeetingTognana, Italy May 15-17, 2007
Confidential
Refrigerant: Properties and System EffectsRefrigerant: Properties and System EffectsRefrigerant: Properties and System Effects
*Reference R22
System Performance*
95-100% 95-100% 98-106%
R407C R134a R410AGlide (K)
GWP
Pressure at 50°C
Heat Transfer*
Compressor COP*
6 0 < 0.5
1610 1300 1090
19.6 13.2 30.8
95-101% 101% 92-100%
Same Slightly less Higher
Stulz offer R22, R407C, R410a, R134a
All without significant derating ???
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Electronic Expansion ValveElectronicElectronic Expansion ValveExpansion Valve• Fast reaction time 1.5 second
• Fully true hermetic design, body from stainless steel
• No additional solenoid valve necessary
• Continuous modulation of mass flow, no stress in the refrigeration circuit
• Ceramic slide and port parts for highly accurate flow and minimal wear
Note brand of EEV - Alco
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Controlled dehumidification at constant airflow
Electronic Expansion Valve: Benefit
No risk of hot spots
->Means safe conditions for computer equipment
Extended dehumidification (selectable)if the preseted humidity is not reached after 30 minutes the airflow will be reduced in addition
Sounds like they are not sure of how well it will work
The EEV valve opens for dehum operation ?
It seems like they have had some issues with hot spots in the room by varying the air flow
• Increased capacity and COP by precise control with short response time and point-precise setting of superheating
• optimized saturation of the evaporator
• Low pressure can be controlled independent of high pressureTherewith is cold water usable to increase capacity in water-cooled DX systems
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Regular Operation „Cold-water“ Operation
CondensingTemperature: 45°C
=>
Capacity: 41,0 kWPower Input: 8,8 kWCOP: 4,67
Calculation for Copeland scroll compressor ZR144
CondensingTemperature: 35°C
=>
Capacity: 48,0 kWPower Input: 7,45 kWCOP: 6,41
Capacity: + 17%Power Input: -15%COP: +37%
Increased efficiency for water-cooled DX
Works at low ambient conditions. Requires cold water supply at 20C. OK for cold winter climates.
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• Only two EEVs covers the whole capacity range ( from 10 up to 60 kW)
• The same valve can be used for all refrigerants
Electronic Expansion Valve: Benefit
Besides Uniflair and Citec, Stulz will be the only major manufacturer who includes the EEV as standard
R407C R134aR410A
This will be an option on DS and Himod.
Expect another Energy Efficiency play here.
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New Compressors series
• Extension of Copeland series “Summit“• Reduced dimensions and weight• One bottom plate for all • One height• Always same connection points• World wide available• Advanced Scroll Temperature Protection
(ASTP)Selling the benefits of Copeland Scroll compressors!
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Advanced Scroll Temperature Protection (ASTP)Advanced Scroll Temperature Protection (ASTP)Advanced Scroll Temperature Protection (ASTP)
• ASTP protects your compressor from excessively high discharge temperatures
• The compressor is protected, but the motor runs further.
• Internal balance between high pressure and suction side
One of the many features of Copeland Scroll compressors
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This is where it gets interesting: The slides below are from our Beat Stulz Silver Bullets PresentationThis is where it gets interesting: The slides below are This is where it gets interesting: The slides below are from our Beat from our Beat StulzStulz Silver Bullets PresentationSilver Bullets Presentation
EC Evaporator FansEC Evaporator FansEC Evaporator Fans“These fans look great, but how do I get them out ?”
EC Evaporator FansEC Evaporator FansEC Evaporator FansCyberAir Operating Instruction manual recognises the removal challenge !
High MTTR (Mean-Time-To-Repair) !!!
Electric HeatersElectric HeatersElectric HeatersHeater elements envelop the EC fan
Retaining clamps are riveted to each element
Removal would require rear access and/or fan removal
High MTTR !!
NC#3 – Humidifier Steam NozzleNC#3 NC#3 –– Humidifier Steam NozzleHumidifier Steam NozzleHumidifier steam nozzle accessible from REAR of unit only
Australian Standard AS3666.2 requires access for inspection and cleaning
NC#2 – Evaporator Drain Tray AccessNC#2 NC#2 –– Evaporator Drain Tray AccessEvaporator Drain Tray AccessEvaporator drain tray accessible from REAR of unit only
Australian Standard AS3666.1 requires access for inspection and cleaning
Based on the Beat Stulz program and Silver Bullets presentations & critique it appears that the changes have been now made to the CyberAir 2 to counter our criticism
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CyberAir 2 - Outstanding accessibilityCyberAir 2 CyberAir 2 -- Outstanding Outstanding accessibilityaccessibilityfront access to all maintenance relevant components
EC-Fan
steam humidifier
compressor
filter dryer
liquid receiver /safety valve
They have come up with the answers to the criticisms
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Outstanding accessibilityOutstanding Outstanding accessibilityaccessibility
Front access to all maintenance relevant components
EC-Fan
steam humidifier
compressor
filter dryer
liquid receiver /safety valve
Himod and PEX always had it
Even though it looks like the EC fan plate is hinged for service, for access need to it lift out
Note top and bottom handles
The humidifier has to be removed on the LH side
Pipe connections obstruct on the LH side
The middle fan should be OK to remove
In all cases the mullions maybe in the way
Note - This shows a 3 fan unit, a single fan unit will have both the fans and pipework in front of the fan
The lifting in and out of replacement compressors at least 600 mm above floor level will be interesting
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Accessibility: Electrical reheat/ humidifierAccessibilityAccessibility: Electrical reheat/ humidifier: Electrical reheat/ humidifierCyberAir 2CyberAir
Fan encircled heaterflat profile heaterone humidifier
position
It was nearly impossible to replace heater elements
Pipework in front of compressors
Access more difficult on Water cooled units
Fan access from rear, with some models also requiring side access
Uneven reheat only on one side of unit
Once field piping connected how will the heater element be removed
Receiver mounted on inner skin
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Reliability: refrigerant circuitReliability: refrigerant circuitReliability: refrigerant circuitCyberAir 2CyberAir
Solder Fittings were replaced with Pipe Elbows
The pipework still looks rough
EEV location
No Valve or spud connection on compressor Hot works still required in room.
Now flare connection on the drier
Compressor support beams
)Accessibility : Pipe ducting
CyberAir 2Only one standardized duct area for all unit sizes
condensate drain
New bottom plate
insertion for power cable
pipe duct areahumidifier inlet
Yes all the possibilities was a nightmare for the contractor
Pipe duct area leads contractor to run pipework in front of and across fan outlet
Concentration of re heat at one end / side of unit
Overlapping elements. Multiple W shape elements
Once field piping connected how will the heater element be removed
Water cooled units not shown where the pipework and WRV will take up more access space
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Behind the service flapsBehind the service flapsBehind the service flaps
steam-pipe distributionUnit size
size 1
size2
size 3-5
Service flaps
1
2
3
OK Why do they need service flaps ?
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Behind the service flaps Behind the service flaps Behind the service flaps
Unit size
size 1
size2
size 3-5
Service flaps
1
2
3
Why do they need service flaps ?
To clean out the condensate tray
To access the humidifier distribution pipes
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A Cross SectionA Cross SectionA Cross SectionBased on a width of 890mm this CAD dwg shows the unit to be over 2000mm high
Distance between Fan inlet and back panel is approx 200mm
Condensate and Humidifier distributor daintray app 200 mm below the bottom of the evap. coil
Filter overlaps coil to allow for smooth air flow
No condensate trap provided in the unit
Looks like a 560mm dia EC fan
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Behind the service flaps Behind the service flaps Behind the service flaps
steam-pipe distribution
OK Why do they need service flaps = Service flaps can be seen just in front of the distributor nozzle pipe
Good steam distribution compared to the previous single outlet on CyberAir 1
Still no by pass air which could be a problem with water in the base of unit and and floor
Stainless Steel tray
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New Condenser - TargetNew Condenser New Condenser -- TargetTarget
• Higher availability
• Cost Reduction
• Clear product line
• Cancellation of former temperature classification
• Reduction of sound pressure groups (only two are requested from the market)
• Epoxy coating for all sizes (continuously available as option)
• Free choice of casing material (Aluminium or galvanised steel)
Looks like at least 6 rows deep. Condenser Fan Power consumption not considered in Calculations!?!?
Cabling and piping loose
Will follow existing philosophy e.g. Pressure actuated Fan cycling control fitted as an option or Fan speed control supplied loose for the contractor to fit as options when requested
No isolating switch fitted as standard or as an option
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CondenserCondenserCondenserFormer condenser product family:
• 57 different condensers types
• 3 sound groups A, B and C
• 3 temperature classes X,Y and Z
• after all only 37 different condensers, because some Z condensers are same to construction like the X condenser of smaller achievement and some C condensers are also used in sound group A
The new series consists of:• 27 types• 2 sound groups (There will be
13 standards and 14 LowNoisetypes)
• All Types in 50Hz and 60Hz available
Sounds simple but probably lost in the translation
Presuming that the new series will also be outsourced