Transcript Document

ClimateMaster 2006 Rep Meeting
ClimaDry™ Applications
Jeff Hammond, Director of Marketing
ClimaDry Applications
What is ClimaDry™?
WSHP Operating Modes
• Cooling
– Dehumidification as a byproduct
– Typical SHR of 0.72 to 0.78
• Heating
• Some WSHPs have Reheat for Humidity Control
– Hot Gas Reheat
– Condenser Water Reheat
– New Energy Reheat
• Electric or hot water
– ClimaDry (patent pending)
• Modulating condenser water regenerative reheat
Standard WSHP Refrigerant Circuit
Condenser
RV
Compressor
Air
Evaporator
TXV
Water
Typical (ON/OFF) Hot Gas Reheat Circuit
Traditional Condenser Water Reheat
ClimaDry Condenser Water Reheat
Low fan speed during
dehumidification mode
LAT sensor
Reheat coil
Space between
reheat and
evaporator coils to
maximize moisture
removal
Evaporator coil
ClimaDry Option Components
ClimaDry Option Components
Condenser
Modulating reheat
water valve (with
integrated LAT
controller)
Condenser water
regeneration pump
ClimaDry Option Components
• DXM Microprocessor Controller
– Incorporates reheat control logic
– Utilizes standard humidistat,
dehumidistat or integrated
thermostat to initiate reheat mode
(selected by dip switches)
– Uses low fan speed during
dehumidification mode
ClimaDry Features
Patent
Pending
• 100% reheat
– Taps full heat of rejection for reheat as needed
– Provides neutral supply air temperature for assured comfort
during dehumidification mode
• Modulating reheat
– precise control of supply air temperatures via integral
proportional controller (72 +/- 3F adj)
– compensates for variations of EAT or EWT
• Simple
– Integrated controls requiring only on/off dehumid call
• DDC options are compatible
– Standard ARI-rated refrigeration circuit
– Standard cabinet with factory-installed components
• Uses “free” waste heat for reheat
– heat of rejection from building water loop
ClimaDry versus the Competition
ClimaDry
Modulating control
"Neutral" supply air temperature
Simple refrigeration circuit
Normal refrigeration pressures
Hot Gas Reheat
ON/OFF control
Uncontrolled supply air temperature
Complicated refrigeration circuit
Unusual & varying refrigeration pressures
Full Reheat
Partial Reheat
ARI rated
performance
Non-ARI product
ClimaDry Applications
Why Use ClimaDry™?
U.S. Dew-point Temperatures
Building Sensible heat Ratio in 7 Cities
Sensible Heat Ratio Trend in Seven Cities
(Sensible Design Day - 7/21)
1
Albuquerque
0.9
Sensible Heat Ratio (SHR)
Fort Worth
0.8
Minneapolis
Boston
0.7
Washington DC
Atlanta
0.6
Miami
0.5
0.4
1975
1980
1985
1990
1995
ASHRAE Standard Year
2000
2005
Sensible Heat Ratio Trend in Seven Cities
(Shoulder Design Day - 5/21)
1
Albuquerque
0.9
Sensible Heat Ratio (SHR)
Fort Worth
0.8
Minneapolis
Boston
0.7
Washington DC
0.6
Atlanta
Miami
0.5
0.4
1975
1980
1985
1990
1995
ASHRAE StandardYear
2000
2005
ClimaDry Applications
• ClimaDry can be applied to most common low SHR
applications, such as . . .
–
–
–
–
–
–
High occupancy loads (classrooms, etc.)
High latent loads (locker rooms, spas)
High infiltration loads (entry areas)
Untreated make up air intake (low fractions)
Humid climates
Anywhere humidity is a problem
ClimaDry Applications
How is ClimaDry™ Sized?
ClimaDry Reheat Operation
• Return air is cooled and dehumidified by the
evaporator coil
• Supply air is reheated by the hydronic reheat coil
to “neutral” conditions
• Dehumidification capability is determined by the
heat pump latent capacity rating:
LC = TC - SC
ClimaDry Operation
GC Series Latent Capacity at 85°F (29.4°C) EWT
Size
Mbtuh
lbs/hr
kW
kg/hr
18
4.7
4.4
1.4
2.0
24
6.1
5.7
1.8
2.6
30
6.8
6.4
2.0
2.9
36
9.6
9.0
2.8
4.1
41
9.7
9.1
2.8
4.1
42
11.0
10.3
3.2
4.7
48
12.7
11.9
3.7
5.4
60
15.2
14.2
4.5
6.4
ClimaDry Applications
How is ClimaDry™ Controlled?
ClimaDry Controls
• DXM board has built-in microprocessor control for reheat
operation
• Cooling takes precedent
• Reheat is engaged by …
–
–
–
–
Dehumidistat
Humidistat
ClimateMaster ATP32U02 thermostat
DDC controls
• Units with PSC or ECM operate at lower airflow during
ClimaDry operation
• Supply air leaves at 72ºF (22ºC) +/- 3ºF (+/-2ºC)
• Optional potentiometer allows further adjustment, +/- 3ºF
(+/-2ºC)
ClimaDry Control Notes
• DXM board required
• DIP switches allow choice of dehumidistat or
humidistat
• Not all integrated t-stats are created the
same!
– Some thermostats with dehumidification mode
only allow dehumidification output in cooling mode
(e.g. Carrier Thermidistat)
– ClimateMaster ATP32U02 allows reheat operation
even when cooling is not required
• ClimaDry = Modulating Reheat with ON/OFF
control input!
ClimaDry Applications
ClimaDry™ Installation
ClimaDry Installation
• All components are inside unit
• Water piping is the same as any other
ClimateMaster unit
• Air bleed must be used to purge air from
reheat coil
• ClimaDry MUST NOT be used for 100%
outside applications
– Reheat coil could be subject to freezing conditions
ClimaDry Applications
ClimaDry™ Availability
In March 1 Commercial Price List and EZ-Order
ClimaDry Availability
• GCV series
– Standard range vertical units for Boiler/Tower
applications
• GLV series
– Large tonnage (6-25 tons) vertical units for Boiler/Tower
or Geothermal applications
• GS, TS, TT series
–
–
–
–
–
Horizontal/Vertical Upflow/Vertical Downflow
R22 (GS) or R-410A (TS/TT)
Extended range (Blr/Twr & Geothermal)
Ultra High Efficiencies
1.5 to 6 tons
Questions?
ClimateMaster 2006 Rep Meeting
ClimaDry Applications
Jeff Hammond, Director of Marketing