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DEHUMIDIFICATION: Natatorium Application & Product Guide
Design, Construct, and Operate toControl Indoor Humidity
Natatoriums have historically posed a difficultenvironment for the conventional HVAC system.The continuous moisture load swimming pools
generate challenges the mechanical system and createsmultiple opportunities for structural damage. The combination of humidity and chlorine not only attack the building, but also provide a breeding ground for moldand bacteria which can jeopardize occupant health andcomfort.
Munters offers a variety of systems in several differentsizes, configurations, and thermodynamic process optionsto meet the customer’s needs.
Munters is the largest manufacturer of dehumidifiers in the world. Since developing the first desiccant
dehumidifier in the late 1930’s, Munters has continued to innovate in the fields of dehumidification and
energy recovery. Our long history and extensive expertise in dehumidification makes us the premier
choice for your dehumidification needs.
Munters is the world leader in dehumidification
Munters, The Humidity Expert
Our extensive knowledge and experience makes us the premierchoice for your dehumidification needs.
1
Prevent Condensation
High humidity and condensation on the buildingstructure can cause significant damage. A detailed dewpoint analysis of the building is required to eliminatecondensation both during initial design and through theend of construction. Thermal bridges in the walls andwindows should be analyzed and reviewed carefully toavoid building damage.
Protect the building and its occupants
Introduce Outside Air into the BuildingOutside air must be brought into the space to dilute
the chlorine that has evaporated from the pool and toprovide fresh air for the occupants.
In order to make room for this outside air, mechanicalexhaust is required. This exhaust should exceed the outdoor air quantity to maintain negative air pressure inthe pool area. Pay special attention that the airflow movesin the correct direction. This ensures that humidity andodors will not transfer into adjacent spaces, and alsokeeps high humidity out of the wall cavities to minimizethe potential for condensation.
Building DesignIt is important to start with the correct
envelope construction to avoid significant problemsduring the life of the building. A proper vapor barrier is needed to keep moisture from being trappedin the buildings walls and roof assembly. Additionallycare should be taken with regard to the window quantity, design and installation, as well as the wallconstruction detail and its insulation. Condensation onbuilding elements during low outdoor air temperaturesshould be carefully guarded against. Please refer to theASHRAE handbooks and The Humidity ControlDesign Guide published by ASHRAE for more information on this subject.
Vapor Retarder Layer
64˚ F (18˚ C)The surface of the interior insulation becomes cold enough to allow condensation to form. The vapor barrier must be installed on the interior side of theinstallation to prevent water from reaching thecold insulation, where condensation will form.
Outdoors0˚ F (-17.8˚ C)
Concrete Block
Face Brick
Rigid Polystyrene Insulation
Inside the Natatorium82˚ F (28˚ C) 60%rhDew Point = 67˚ F (19.4˚ C)
Standard 62.1 – 2004 calls for:0.48 CFM PER SQUARE FOOT OF POOL AND DECK AREA &7.5 CFM PER PERSON IN THE SPECTATOR AREA
FROM ASHRAE
An efficient HVAC system must function properlyduring all seasons and be capable of handling all possibleindoor and outdoor air conditions—even those abnormalswings. The system should provide precise humidity control because the evaporating water from the pool iscontinuously released into the air. and must be constantlyremoved. Space air condition and water temperature mustalso be balanced for occupant comfort based on the typeof pool. (See chart at right).
The recommended conditions for pools as indicatedin the ASHRAE Applications Handbook and HumidityControl Design Guide:
FROM ASHRAE
Air Temp ºF75 to 85
80 to 85
78 to 85
80 to 85
80 to 85
Type of PoolRecreational Therapeutic Competition DivingWhirlpool/Spa
RH%50 to 60
50 to 60
50 to 60
50 to 60
50 to 60
Water Temp ºF75 to 85
85 to 95
76 to 82
80 to 90
97 to 104
2
Temperature ºF
78 80 82 84 86 88 90 92 94 96 98 100 102 104
Pool Evaporation Rate
Evaporation Rate Equation:
POOL LOAD = 0.1 X POOL AREA X �ΔVAPOR PRESSURE X USE FACTOR
Use Factor
0.5
0.65
0.65
0.8
0.8
1.0
1.0
Type of Pool
Residential
Fitness Club / Condo
Therapy / Elderly Swim
Hotel
Institutional / School
Public Pools
Spas and Whirlpools
Where:Load = the evaporation rate of the pool (lbs/hr)Pool Area = the surface area of the water (sq. ft.)ΔVapor Pressure = the difference in vapor pressure of the air and water (in of Hg)Use factor = the occupancy factor from ASHRAE.
Vapor Pressure (Inches of Mercury)
Water
Air
0.9670.4840.581
1.0330.5170.620
1.1030.5510.662
1.1760.5880.706
1.2540.6270.753
1.3360.6680.802
1.423------
1.515------
1.612------
1.714------
1.821------
1.935------
2.054------
2.180------
100%50%60%
Relative HumidityFluid Type
btu/hr
105
158
210
252
546
630
872
966
1092
Activity per hour
Seated at Rest
Seated Very Light Work
Seated, Light Work
Walking, Standing
Moderate Dancing
Walking Briskly w/Loads
Light Exercise
Medium Athletic Activity
Athletics
lbs/hr
0.10
0.15
0.20
0.24
0.52
0.60
0.83
0.92
1.04
Outside Air Humidity Load
OA Humidity Load Equation: use ASHRAE design dew point conditions:
OA LOAD (LBS/HR) = 0.000643 X OACFM X �ΔHUMIDITY RATIO
Where:OA Load = the humidity load of the outside air (lbs/hr)OACFM = Ventilation Air Quantity (cfm)ΔHUMIDITY RATIO = the difference in absolute humidity of the outside air and the space
FROM ASHRAE APPLICATIONS HANDBOOK
Calculate the Loads
Properly calculating the internal and external loads of the facility is a
critical step in designing a natatorium. The HVAC equipment is sized
based on load calculations and the type of facility being constructed.
An indoor swimming pool has a remarkable chance of experiencing
moisture problems, but with accurate load calculations of the pool
evaporation rate, peak outside air loads, and the internal load in the
space you can successfully design a healthy and enjoyable natatorium.
FROM ASHRAE APPLICATIONS HANDBOOK
Internal Humidity Load
People are an internal load to thespace and their activity should beconsidered in the calculation. Use the chart below to determinethe activity load per hour.
TOTAL HUMIDITY LOAD = OA HUMIDITY LOAD + INTERNAL HUMIDITY LOAD + POOL LOAD
3
Weather is a critical component of the building load. When climate is hot and dry, it presents different challenges for a HVAC system than when it is hot and humid. Differing outdoor conditions require specific performances from dehumidification and air conditioning systems. The same type of system throughout the country will not efficiently meetthe needs of different area and different climate requirements.
Energy recovery and mechanical dehumidifierrequirements are significantly different basedon outdoor conditions.
In the west, the outdoor condition is gener-ally much lower than the space condition.Outdoor air can naturally be used for indoordehumidification, and if provided with an effi-cient energy recovery device, it can be done atsignificantly reduced operating costs.
In the east, outdoor air can be used parttime for dehumidification and the mechanicaldehumidification cycle is only needed for thehigher ambient humidity. With colder tempera-tures in the north, energy recovery for winteroperation is easily justified. Depending on thepriorities of the user, a significantly differentsystem may be appropriate to maximize energyefficiency.
CA
NV
ID
MT
WY
UT
AZ
TX
NM
COKS
OK
NE
SD
ND
MN
IA
MO
AR
LA
MSAL
FL
GA
IL
WI
IN
MI
OH
KY
TN
SC
VA
NC
PA
NY
WV
HI
MEWA
CAKY
VA
NC
V T
OR
MD
NJ
NH
R I
CT
MA
DE
DC
QC
NL
ONMBSK
ABBC QCABBC CANADA
NVUT
CCCOOOKKSS MO
IIILLL IIINN
WVCCAA
KKYYVVAA
NJ
DEUNITED STATES
DRY
Dew Point Temperature
Duct DesignThe air distribution system should
be designed in such a way as to minimize stagnation in the buildingenvelope. While keeping velocity overthe pool surface low, air movement isdesirable to control chloramines.
Supply air should be washed overwindows and other surfaces that mayexperience low temperatures in coldweather that might lead to condensation. Exhaust and return airinlets should be located high to capture hot and humid air. Whirlpoolsshould have an exhaust air connectiondirectly above.
Ductwork should be aluminum, painted galvanized, 300 series stainless steel or lightweight corrosion resistant fabric.Munters offers DryFlo Ducting. DryFlo ducting is cylindrical tubes constructed of a durable fabric that uniformly dis-perses air into the space. (See Munters Distribution System illustration above.)
Temperature & humidity controlled room
Return air vent mounted as
high as possiblein room
Weather-proofMunters dehumidifier
sits outside natatorium
Exhaust outsideair intake to flush
out chlorine-laden odors
Dry air keeps glass freeof condensation and
water damage
Dry ductwork resistant to mold and mildew growth
Dry pool environment helps preservepool structure from moisture damage
Dryer floors
Exhaustfan
COOLER & HUMID
HOT & HUMID
Choose pool technology best suited for that region
4
Wringer Pool
Southeast, Northeast, Southwest, Northwest
Reduced compressor runtime for enhanced
reliability, Low operating cost, Increased ventilation
Small, Medium, Large
Ventilation Pool
Southwest, Northwest
Eliminated compressor runtime for enhanced
reliability, Low operating cost,Increased ventilation
Small, Medium, Large
Pool Desiccant
Southeast, Northeast
Reduced compressor runtime for enhanced reliability
Medium, Large
DryCool Pool
Southeast, Northeast
Low first cost
Small, Medium
Climate
Priority
SystemSize
Where is the building locatedand what is the local climate?
Hot and Humid: Southeast U.S.Humid, but with cold winter climate: Northeast U.S.Hot and Dry: Southwest U.S.Dry, but with cold winter climate:Northwest U.S.
What are the priorities of thesystem required?
1. Reliability2. First Cost3. Operating Cost4. Increased Ventilation during most of
the year
What is the system size requirement?
Small - < 150 lbs/hrMedium - > 150 lbs/hr, < 300 lbs/hrLarge - > 300 lbs/hr
System Types and Features
Selecting the Right System
1 2 3
The system features listed do not outline the extent of the product line availability, rather they outline the features of the systems in competitive environments.See the specificsystem description on the following pages to see the available capacities of each product.
Munters Offers Different SolutionsFour different types of systems are available to meet both the difficult requirements of the natatorium and the
diverse climates these buildings may experience. These different solutions can be optimized to provide the best solutionfrom a first cost, life cycle cost, and sustainability perspective. They allow for the optimization of energy savings and performance.
Heat Pump OptionWringer Pool and Ventilation Pool systems are availablewith the heat pump option to heat the pool water. Thisoptions adds an evaporator coil to the exhaust airstream as it leaves the unit to recover the last amount ofheat from the building exhaust. This allows the heatpump system to efficiently heat the pool water all yearlong. The dehumidification cycle is not required tooperate and the system is sized based on the energyavailable in the exhaust air stream. The heat pump isalso configurable to provide air heating in the winter whenever sufficient heat is available from the exhaustair stream, and providing very efficient heating of theoutside air after it has been preheated by the sensibleheat exchanger.
MIX OF O/A, PREHEATED BY AIR-TO-AIR HX, AND
RECIRCULATION AIR
EXHAUST AIR(AFTER HX)
POOL WATER OUT 90ºF (32.2ºC)
POOL WATER IN 80ºF (26.7ºC)
HEATED S/A TO SPACE
SCROLLCOMPRESSOR
POOL WATER HEATER(CONDENSER 2)
SUPPLY AIR HEATER(CONDENSER 1)
5
Product Features
• 2” double wall casing
• Sensible counter-flow, cross-flow, and heat pipe heat
exchangers with up to 88% efficiency
• Simple dehumidification and energy recovery modes for easy
maintenance and control
• Outside air dehumidification mode for reduced compressor
run hours
• Increased ventilation throughout many operating hours
• Built in building exhaust fan to maintain negative pressure
• Packaged DX, split system DX, water cooled DX & chilled
water options
• DDC microprocessor controls option
• Option for 100% outside air during purge mode
• Stainless steel drain pans
• Heat pump air and water heating available as option
• ETL listed
Wringer Pool Products DescriptionThe Wringer Pool dehumidifier utilizes energy recovery toprovide heat recovery in the winter and pre-cool/reheatduring the summer. The combination of mechanical dehu-midification and outside air dehumidification provides anextremely efficient and reliable dehumidification system.The energy derived from the cooling coils is used to reheatthe supply air through a refrigerant reheat coil. During highoutdoor humidity the cooling coil acts as the dehumidifier,using the heat exchanger to minimize energy. When thehumidity outside is lower than the desired space condition,the unit brings in more outside air to meet the dehumidifi-cation load without the need for the cooling coil or com-pressor run hours, while the heat exchanger recovers theheat from the exhaust air stream to minimize the heatingrequirement. The unit modulates the outside air to theminimum position during very cold conditions to minimizeenergy requirements. In addition, a heat pump option canbe added to the exhaust air stream to provide pool waterand/or supply air heating to increase overall unit efficiency.
OUTSIDE AIR
EXHAUST AIR
RETURN AIR
SUPPLY AIR
COOLING COIL
SENSIBLEHEAT
EXCHANGER
A
D CB E
Wringer Airflow & Schematic
Wringer Capacity Chart
WR 04WR 06WR 08WR 12WR 18WR 24WR 30WR 40WR 50
Unit
4,0006,0008,00012,00018,00024,00030,00040,00050,000
4,7007,4009,000
12,70022,00027,00032,00039,00044,000
1,000 - 1,5001,500 - 2,2502,000 - 3,0003,000 - 4,5004,500 - 6,7506,000 - 9,0007,500 - 11,00010,000 - 15,00012,000 - 18,000
Pool Size (sq. ft.)
CFM Weight (lbs.)Dimensions (in.)
L x W x H
84 x 66 x 19284 x 66 x 19284 x 66 x 192
100 x 74 x 216132 x 78 x 234144 x 98 x 252
144 x 114 x 276144 x 146 x 312144 x 156 x 396
State Summer Winter
Point
ABCDE
Return
Outside Air
Post Heat Exchanger
Post Cooling Coil
Supply Air
CFM
10,0009,0009,0009,0009,000
ºF
8493897070
gr/hr
10465656565
CFM
10,0002,0002,0002,0009,000
ºF
84-135555
105
gr/hr
77244
61
6
Product Features
• Foam injected 2” double wall casing
• Desiccant enhanced process for lower connected tonnage
and lower operating cost
• Packaged DX, split system DX, water cooled DX and chilled
water options
• Coated cooling coils and other critical components
• DDC microprocessor controls
• Option for 100% outside air during purge mode
• Stainless steel drain pans
• ETL listed
Point
ABCDE
State Summer Winter
Return
Post Cooling Coil
Post Desiccant Wheel
Outside Air
Supply Air
CFM
6,0006,0006,0004,000
10,000
ºF
8251699579
gr/hr
1005634
12068
CFM
6,0006,0006,0004,000
10,000
ºF
8282822090
gr/hr
1001001001064
DryCool Pool
OUTSIDE AIR
EXHAUST AIR
RETURN AIR
SUPPLY AIR
COOLING COIL
DESICCANTWHEEL
MOIST AIR TO ATMOSPHERE
AIR COOLEDCONDENSER
HEATED TO
115°F
AC
D
B E
DryCool Pool Capacity
HCU-N 1005HCUc-2410HCUc-3412HCUc-3415HCUc-4015HCUc-4020HCUc-6020HCUc-6030HCUc-8030HCUc-8040
Unit
1,0001,3502,2502,7002,7002,7003,6005,4005,4007,200
1,2002,4003,4003,4004,0004,0006,0006,0008,0008,000
2,2003,7504,0004,0004,5004,500
10,00010,00014,00014,000
250500833
1,0001,0001,3331,3332,0002,0002,667
1,2001,5002,5003,0003,0004,0004,0006,0006,0008,000
5101215152020303040
40 lbs/hr70 lbs/hr90 lbs/hr105 lbs/hr115 lbs/hr145 lbs/hr160 lbs/hr225 lbs/hr240 lbs/hr315 lbs/hr
58 x 43 x 61178 x 65 x 57178 x 65 x 57178 x 65 x 57193 x 65 x 72193 x 65 x 72226 x 86 x 70226 x 86 x 70249 x 96 x 86249 x 96 x 86
9003,5003,5003,5004,2504,2505,2505,2507,8507.850
Maximum CFMOA Return Total
MinimumExhaust
MaximumExhaust
Tons Dehumid lbs/hrDimensionsL x W x H
WeightPounds
Capacity based on 82F 60% RH space condition
DryCool Airflow & Schematic
Product DescriptionThe DryCool Pool dehumidifier provides energy effi-cient dehumidification in a small packaged product atlow cost. Condenser heat is recovered from thedirect expansion refrigeration system to provide thereactivation energy for the desiccant dehumidificationprocess. The cooling energy of the refrigeration sys-tem is used to cool and dehumidify the air prior toentering the desiccant wheel. The hybrid refrigerant-desiccant system provides an efficient dehumidifier byeliminating the overcooling required with a refrigera-tion only based dehumidifier. The system uses thereactivation fan as the exhaust air fan to maintainnegative pressure in the space while further enhanc-ing efficiency and minimizing the unit footprint andcost.
7
Ventilation Pool Products DescriptionThe Ventilation Pool unit is an enhanced energy recovery system.
The core of the unit is an efficient sensible energy recovery heat
exchanger. The chart below shows that outdoor air can be used
to provide dehumidification for natatorium environments effective-
ly up to approximately 60ºF dew point. The outdoor air supply
can be modulated to provide the correct dehumidification capaci-
ty and to not over-dehumidify when possible. In western or simi-
lar climates, the 60ºF dew point condition is rarely exceeded.
This allows the system to maintain the desired space humidity
most of the time with no need for mechanical dehumidification.
On occasion when it is exceeded the resultant increase in space
humidity is small. Temperature and humidity in the space will
exceed the design condition for a short period of time, but the
trade off is a simplified unit design with no refrigeration system.
Cooling can be provided with indirect evaporative cooling,
enhancing the system performance and efficiency. Direct evapo-
rative humidification can be added to the supply air. This will
minimize the evaporation rate of the pool and the chemical
requirements for pool maintenance. Simple, low operating cost,
low maintenance, and improved air quality through increased
ventilation make the Ventilation Pool unit an attractive option for
natatoriums.
Product Features
• 2” double wall casing
• Optional indirect evaporative cooling to provide cooling dur-
ing high ambient temperatures
• Optional direct evaporative cooling to minimize pool evapora-
tion during low dew point conditions
• Sensible counter-flow, cross-flow, and heat pipe heat
exchangers with up to 88% efficiency
• Simple dehumidification and energy recovery modes for easy
maintenance and control
• Outside air dehumidification mode eliminating compressors
• Increased ventilation throughout many operating hours
• DDC microprocessor controls option
• Option for 100% outside air during purge mode
• Heat pump air and water heating available as option
• ETL listed
OUTSIDE AIR
EXHAUST AIR RETURN AIR
HEATING COILSENSIBLE
HEATEXCHANGER
B D E
A
C
Ventilation Airflow & Schematic
State Summer Winter
Point
ABCDE
Return
Outside Air
Post Heating Coil
Post Heat Exchanger
Supply Air
CFM
10,5002,0007,0007,000
10,000
ºF
8495616876
gr/hr
104118
808080
CFM
10,5002,0002,0002,000
10,000
ºF
8400
7198
gr/hr
77444
55
Outdoor Air Dehumidification
05101520253035404550556065
OutsideDew PointTemp. ºF
5,0005,0005,0005,0005,0005,0005,0005,0005,0005,0005,0005,0005,0005,000
3022972902822712582422232021771471116919
10,00010,00010,00010,00010,00010,00010,00010,00010,00010,00010,00010,00010,00010,000
60559558156454351748444740435429322213839
OACFM
lbs of H20
Removed20,00020,00020,00020,00020,00020,00020,00020,00020,00020,00020,00020,00020,00020,000
1,2101,1891,1621,1281,0851,03496889480870758744427678
Note: Based on space condition of 82ºF, 60% RH.
OACFM
lbs of H20
Removed
OACFM
lbs of H20
Removed
8
Product Features
• Foam injected 2” double wall casing
• Desiccant dehumidification process for lower connected
tonnage and lower compressor run hours
• Low relative humidity during dehumidification process for
reduced corrosion
• Packaged DX, split system DX, water cooled DX and chilled
water options
• Coated cooling coils and other critical components
• DDC microprocessor controls option
• Option for 100% outside air during purge mode
• Stainless steel drain pans
• ETL listed
Pool Desiccant
OUTSIDE AIR
OUTSIDE AIR
RETURN AIR
COOLINGCOIL
POOLHEATING
COIL
MOIST AIR TO ATMOSPHERE
DESICCANTWHEEL
GASBURNERHEATED
TO250°F
AD
E
FCB
Pool Desiccant Capacity Chart
DDS 20DDS 30DDS 40
10,00030,00050,000
10,00030,00050,000
12,00030,00050,000
250500
1,000
10,00015,00025,000
100200300
250 lbs/hr350 lbs/hr500 lbs/hr
219 x 80 x 70219 x 96 x 101280 x 134 x 101
6,5008,500
10,500
Maximum CFMOA Return Total
MinimumExhaust
MaximumExhaust
Tons Dehumid lbs/hrDimensionsL x W x H
WeightPounds
DDS Airflow & Schematic
Unit
Point
ABCDEF
State Summer Winter
Return
Post Desiccant Wheel
Post Heating Coil
Post Cooling Coil
Outside Air
Supply Air
CFM
10,00010,00010,00010,000
5,00015,000
ºF
80119119
659575
gr/hr
100545454
12076
CFM
10,00010,00010,00010,000
5,00015,000
ºF
8282
1251252090
gr/hr
1001001001001070
Products DescriptionThe Pool Desiccant unit utilizes a silica gel desiccant dehu-
midification wheel with gas fired reactivation to provide
dehumidification without the need for compressorized
refrigeration. Cooling coil operation is only required to pro-
vide temperature reduction in the space during high ambi-
ent temperatures. The wheel turns at a slow 0.1 rpm mini-
mizing maintenance. The desiccant process heats and
dehumidifies the supply air reducing the heating required in
the heating mode. The effect of this process provides low
relative humidity inside the unit and therefore reduced cor-
rosion. Great flexibility and reliability are provided in a
packaged large capacity unit.
9
Annual Energy Expense $16,761.40
10297928782777267625752474237322722171272-3
DryBulb
DryBulb
Annual Energy Expense $5,109.04
10297928782777267625752474237322722171272-3
LocationSupply CFMRequired Supply Air Humidity RatioSummer Outside AirReturn Air TemperatureReturn Air Relative Humidity
3119 MBH189 MBH198 #/Hr.50.2 ºF
Temp.MCWB*
Total Hours.*
atCondition
DPOutside
Air
7576747270676461575247433834302521161161-3
63.367.666.465.464.562.059.657.453.748.042.338.732.829.927.021.318.913.37.61.6-4.7-81.9
06581653244876817597006045815655727258695893712311641158993
5,0005,0005,0005,0005,0005,0005,00010,0017,5255,7294,7664,3803,9343,7563,6123,3923,3223,1943,0983,0262,9712,843
DehumidCoil Tons
27.6431.0328.9927.1125.3820.8116.540.000.000.000.000.000.000.000.000.000.000.000.000.000.000.00
DehumidCoil Cost
$0$22$197$524$964
$1,188$1,320
$0$0$0$0$0$0$0$0$0$0$0$0$0$0$0
Condenser Heat
AvailableBTUH
414,652465,418434,864406,969380,774312,183248,038
000000000000000
RequiredSupply
Air Temp.
73.274.375.476.578.379.882.082.683.283.784.384.985.586.186.687.287.888.489.089.590.190.7
No HeatSupply
Air Temp.
74.174.174.174.174.174.174.179.479.479.579.579.379.279.078.878.778.578.478.278.077.877.8
Cost to Heat Supply
Air$0$0$2$11$38$75$147$66$72$70$76$86$97$138$184$136$94$63$48$36$30$33
Condenser AirReheatCredit
$0$0$2$11$38$75$147$0$0$0$0$0$0$0$0$0$0$0$0$0$0$0
CondenserWaterHeat
Credit$0
$1.66$16.06
$45$89.70$114.66$64.29
$0$0$0$0$0$0$0$0$0$0$0$0$0$0$0
DollarsSpentTotal
$0$20.16
$181.01$478.63$874.24
$1,073.22$1,255.49
$66.00$72.06$69.60$76.04$85.61$96.78
$138.10$183.99$135.66$93.54$62.78$47.88$35.94$29.67$32.64
Operating Cost of Munters Ventilation Pool Product
Economic Evaluation and Life Cycle Cost
Munters has software tools to analyze the operating cost of each system. Unit selection andcost data are inputted with design parameters, local weather data, and energy costs. The output isannual energy cost, annual energy savings, and simple payback.
Chicago, IL.20,0000.01215,0008260
Cooling Equipment C.O.PSummer Building LoadWinter Building LoadMax Evaporation RateDX LAT
Change Over Dew PointHeat Recovery EffectivenessCooling Fuel CostCost of Heating FuelEfficiency of Fuel Conversion (Heating)Outside Air CFM at Change Over
58.365.0$0.100/kwh=$9.77/Million BTU of Cooling Input$1.00/1,000,000 BTU8012,000
LocationSupply CFMRequired Supply Air Humidity RatioMin Outside AirReturn Air Temperature
3180 MBH300 MBH198 #/Hr.
Temp.MCWB*
Total Hours.*
atCondition
DPOutside
Air
7576747270676461575247433834302521161161-3
63.367.666.465.464.562.059.657.453.748.042.338.732.829.927.021.318.913.37.61.6-4.7-81.9
06581653244876817597006045815655727258695893712311641158993
5,0005,0005,0005,0005,0005,0005,0005,0005,0005,0005,0005,0005,0005,0005,0005,0005,0005,0005,0005,0005,0005,000
DehumidCoil
LAT/Tons
62.1/40.560.5/46.960.9/45
61.3/43.561.7/42.162.5/38.763.3/35.763.9/33.264.8/29.266/24.1
82/082/082/082/082/082/082/082/082/082/082/082/0
DehumidCoil Cost
$0$33$307$842
$1,602$2,211$2,853$2,955$2,397$1,711
$0$0$0$0$0$0$0$0$0$0$0$0
Condenser Heat
AvailableBTUH
608,142703,896676,459652,889632,694580,941536,244498,342438,289362,567
000000000000
RequiredSupply
Air Temp.
73.774.875.876.977.979.080.081.182.183.284.285.386.387.488.589.590.691.692.793.794.895.8
No HeatSupply
Air Temp.
72.169.668.767.866.866.265.564.764.263.874.573.372.070.869.568.367.065.864.563.362.060.8
Cost to Heat Supply
Air$0$1$11$41$98$169$268$337$341$318$153$185$223$327$447$340$237$162$125$95$79$88
Condenser AirReheatCredit
$0$1$11$41$98$169$268$337$341$374$0$0$0$0$0$0$0$0$0$0$0$0
CondenserWaterHeat
Credit$0
$1.66$16.06$45.68$89.70$134.82$135.71$42.41
$0$0$0$0$0$0$0$0$0$0$0$0$0$0
DollarsSpentTotal
$0$31.34
$290.50$796.50
$1,511.98$2,075.71$2,665.17$2,819.62$2,354.74$1,754.98$153.47$184.55$222.57$327.40$446.72$339.58$237.08$162.05$125.29$95.04$79.11$88.48
Operating Cost of Conventional Refrigeration-Based Pool Dehumidifier as ComparisonChicago, IL.20,0000.01215,00082
Cooling Equipment C.O.PSummer Building LoadWinter Building LoadMax Evaporation Rate
Heat Recovery EffectivenessCooling Fuel CostCost of Heating FuelEfficiency of Fuel Conversion (Heating)Return Air Relative Humidity
0$0.100/kwh=$9.77/Million BTU of Cooling Input$1.00/1,000,000 BTU8060
*Weather data used for Chicago, IL. Heat exchanger effectiveness is based on dry sensible heat transfer. Condensing within the heat exchanger will increase performance.
$5,000 vs. $16,000
10
$0$29.46
$324.01$998.35
$1,598.11$2,130.02$2,805.21
$77.48$75.73$79.01$87.98
$100.24$123.42$133.20$129.15$81.80$51.82$26.77$14.49$3.97$0.32
$0
DryBulb
LocationSupply CFMRequired Supply Air Humidity RatioSummer Outside AirReturn Air TemperatureReturn Air Relative Humidity
360 MBH200 MBH198 #/Hr.58.3 ºF
Annual Energy Expense $8,870.54
10297928782777267625752474237322722171272-3
DryBulb
Temp.MCWB*
Total Hours.*
atCondition
DPOutside
Air
7776747270686661565147423733292419151061-4
67.167.666.465.464.563.763.057.451.846.040.036.330.327.324.117.811.08.92.01.6-4.7-81.9
0672243428631925858755688671665734708621362212101511310
5,0005,0005,0005,0005,0005,0005,00010,0016,7795,3254,5084,1753,7813,6253,4923,2953,1523,1173,0303,0262,9712,843
DehumidCoil Tons
43.6641.8938.4035.0531.8628.8025.880.000.000.000.000.000.000.000.000.000.000.000.000.000.000.00
DehumidCoil Cost
$0$29$324$998
$1,598$2,130$2,805
$0$0$0$0$0$0$0$0$0$0$0$0$0$0$0
Condenser Heat
AvailableBTUH
327,485327,485327,485327,485327,485327,485327,485
000000000000000
RequiredSupply
Air Temp.
79.279.280.480.981.582.182.783.283.884.484.985.586.186.787.287.888.488.989.590.190.691.2
No HeatSupply
Air Temp. F°
76.476.476.476.476.476.476.479.980.180.180.180.079.979.779.679.579.479.279.078.878.778.6
Cost to Heat Supply
Air$0$1$8$30$59$97$157$77$76$79$88$100$123$133$129$82$52$27$14$4$0$0
Condenser AirReheatCredit
CondenserWaterHeat
Credit$0$0$0$0$0$0$0$0$0$0$0$0$0$0$0$0$0$0$0$0$0$0
Operating Cost of Wringer Pool ProductWashington DC20,0000.01215,0008260
Cooling Equipment C.O.PSummer Building LoadWinter Building LoadMax Evaporation RateDX LAT
Change Over Dew PointHeat Recovery EffectivenessCooling Fuel CostCost of Heating FuelEfficiency of Fuel Conversion (Heating)Outside Air CFM at Change Over
58.365.0$0.100/kwh=$9.77/Million BTU of Cooling Output$1.00/1,000,000 BTU8012,000
LocationSupply CFMRequired Supply Air Humidity RatioMin Outside AirReturn Air Temperature
3180 MBH300 MBH198 #/Hr.
Annual Energy Expense $19,770.76
10297928782777267625752474237322722171272-3
7576747270686661565146423733292419151061-4
63.367.666.465.464.563.763.057.451.846.040.036.330.327.324.117.811.08.92.01.6-4.7-81.9
0672243428631925858755688671665734708621362212101511310
5,0005,0005,0005,0005,0005,0005,0005,0005,0005,0005,0005,0005,0005,0005,0005,0005,0005,0005,0005,0005,0005,000
62.1/40.560.5/46.960.9/45
61.3/43.561.7/42.1
62/4162.2/40.163.9/33.265.3/27.466.4/22.5
82/082/082/082/082/082/082/082/082/082/082/082/0
$0$33$381
$1,240$2,116$3,034$4,347$3,341$2,426$1,822
$0$0$0$0$0$0$0$0$0$0$0$0
608,142703,896676,459652,889632,694615,350601,517498,342411,333338,867
000000000000
73.774.875.876.977.979.080.081.182.183.284.285.386.387.488.589.590.691.692.793.794.895.8
72.169.667.866.865.864.764.764.564.163.874.573.372.070.869.568.367.065.864.563.362.060.8
$0$1$14$60$129$226$385$381$361$357$177$217$289$320$319$209$135$71$39$11$1$0
$0$1$14$60$129$226$385$381$361$291$0$0$0$0$0$0$0$0$0$0$0$0
$0$1.66$19.93$67.25$118.49$174.69$256.08$153.41$26.75
$0$0$0$0$0$0$0$0$0$0$0$0$0
$0$31.34
$360.62$1,172.33$1,997.31$2,859.12$4,091.29$3,187.39$2,399.73$1,887.00$177.25$217.21$285.60$319.72$319.23$208.71$135.47$70.85$38.96$10.74$0.89
$0
Operating Cost of Conventional Refrigeration-Based Pool Dehumidifier as ComparisonWashington DC20,0000.01215,00082
Cooling Equipment C.O.PSummer Building LoadWinter Building LoadMax Evaporation Rate
Heat Recovery EffectivenessCooling Fuel CostCost of Heating FuelEfficiency of Fuel Conversion (Heating)Return Air Relative Humidity
0$0.100/kwh=$9.77/Million BTU of Cooling Input$1.00/1,000,000 BTU8060
*Weather data used for Washington, DC. Heat exchanger effectiveness is based on dry sensible heat transfer. Condensing within the heat exchanger will increase performance.
DollarsSpentTotal
Temp.MCWB*
Total Hours.*
atCondition
DPOutside
Air
DehumidCoil Tons
DehumidCoil Cost
Condenser Heat
AvailableBTUH
RequiredSupply
Air Temp.
No HeatSupply
Air Temp. F°
Cost to Heat Supply
Air
Condenser AirReheatCredit
CondenserWaterHeat
Credit
DollarsSpentTotal
This two-page comparison allows the designer and end user to make intelligent decisionsregarding system configuration and payback criteria. Together, Munters can assist in selecting thecorrect systems and options to meet the customers needs and desires.$8,000 vs. $19,000
$0$1$8$30$59$97$157$0$0$0$0$0$0$0$0$0$0$0$0$0$0$0
11
Munters Flexibility
Natatoriums vary in size, shape,
and location. Some are low, small
rooms, others are atriums of
hotels with vast deck areas and
high ceilings. Some are totally
interior with no transmission load,
while others are completely
enclosed in glass with large
transmission loads. Munters
provides a standard or
customized product for precise
application for any amount and
proportion of sensible and latent
capacity to meet the load.
Munters provides systems with
increased outside air throughout
the year to improve indoor air
quality, while reducing the air to
minimum required airflows during
extreme temperatures to
minimize operating cost.
Munters Corporation Tel: (800)-229-8557
E-mail: [email protected]
AG 0003-10 06/08
