RezPro ToolBox Training

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RezPro ToolBox Training
OBJECTIVES TRAIN THE TRAINERS CURRENT PROGRAMS
AVAILABLE PROGRAM OVERVIEW APPLICATION EXAMPLES
DISCUSSION OF DISTRIBUTION ISSUES
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WEATHER TOOLBOX
Create and review summaries of hourly weather
data. Utilizes Typical Meteorological Year
(TMY-2) data produced by the National Renewable
Energy Laboratory in Golden, CO. This data
includes 8760 hour by hour values for a typical
month (based on 30 years of observations). 239
weather locations mostly within the United
States. The present program is developed in IP
units only.
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SHOW ALL DATA
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ANALYZE
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BINNING SUMMARY OF WEATHER CONDITIONS FOR
SELECTED TIME INTERVALS. FROM A MUA STANDPOINT,
DESIGN AND FREQUENCY OF CONDITIONS ARE IMPORTANT
TO KNOW..
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BINNING
PRIMARY BIN VARIABLE REPRESENTS ACTUAL WEATHER
DATA IN 2 DEGREE INCREMENTS MEAN COINCIDENTAL
VALUES ARE AVERAGED AND DO NOT REPRESENT THE
JOINT OCCURRENCE OF DRY BULB AND DEW POINT.
WHEN HUMIDITY IS IMPORTANT ALWAYS BIN ON DEW
POINT BINS ARE CONVENIENT FOR SUMMARIZING
WEATHER CHARACTERISTICS, ACTUAL WEATHER DATA CAN
REFLECT THE JOINT OCCURRENCE OF BOTH DRY BULB AND
DEW POINT
THE FREQUENCY CALCULATOR WAS DEVELOPED FOR THE
USER TO ANALYZE THE FREQUENCY OF OCCURRENCE FOR
ALL PROGRAM VARIABLES.
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FREQUENCY CALCULATOR - CLIMATE DIAL
THE CLIMATE DIAL ALLOWS THE USER TO ANALYZE THE
TOTAL HOURS WHERE WEATHER CONDITIONS ARE ABOVE OR
BELOW A GIVEN OUTSIDE AIR SETPOINT.
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ENGINEERING TOOLS
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PSYCHROMETRICS
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MIXED AIR CALCULATOR
CALCULATES MIXED AIR PROPERTIES OF TWO AIR STREAMS
UNIT CONVERSIONS
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WINDOW CONDENSATION - WINTER TIME
PREDICTS THE MAXIMUM RELATIVE HUMIDITY A SURFACE
CAN SEE WITHOUT VISIBLE CONDENSATION FORMING ON
WINDOWS
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OPEN POOL OR SURFACE EVAPORATION
USED TO ESTIMATE LATENT HEAT GAINS FROM MOISTURE
EVAPORATING FROM AN OPEN WATER SURFACE INTO THE
SPACE.
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MOTOR HEAT GAIN
EDUCATES PROGRAM USERS ON PROPERLY APPLYING HEAT
GAIN FUNDAMENTALS.
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BOSTON RESTAURANT
OWNER NEEDS HEATED VENTILATION MAKE UP AIR.
SPACE IS NEVER TO EXCEED 75 65 RH. THE
OWNER DOES NOT WANT AIR CONDITIONING OCCUPIED
TIME 700 AM TO 600 PM
Should we provide heating equipment and provide
useful information to the owner ?
CAN THIS PERSON ENJOY THEIR MEAL?
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PHOENIX, AZ. RESTAURANT EXAMPLE
A PHOENIX ARIZONA RESTAURANT OWNER WISHES TO USE
EVAPORATIVE COOLING FOR THE DINNING ROOM AREA.
THE LUNCH CROWD IS BIG BUSINESS AND OCCURS
BETWEEN 1130 AND 130 PM. THE OWNER DOES NOT
WANT TO EXCEED 75 AND 65 RH IN THE SPACE DURING
LUNCH. WHAT WOULD YOU RECOMMEND ?
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BALTIMORE, MD - HOTEL CORRIDOR
OWNERS NEED MAKE UP AIR HEATING AND QUESTIONS THE
NEED FOR AIR CONDITIONING OF THE MAKE UP AIR.
THE PEAK SEASON OCCURS IN THE SUMMER. IF THE
CORRIDOR TEMPERATURE IS MAINTAINED AT 75F THROUGH
INDIRECT MEANS, WHAT IS THE MAXIMUM RELATIVE
HUMIDITY WHICH COULD OCCUR DURING AUGUST???
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SALT LAKE - SWIMMING POOL PUSH/PULL SYSTEM -
INDIRECT FIRED WITH 100 O.A.
THE POOL AREA SHOULD BE MAINTAINED AT NO GREATER
THAN 84F 65 IN THE SUMMER. OUTSIDE AIR IS USED
TO DEHUMIDIFY THE POOL DECK BASED ON TYPICAL
EVAPORATION RATES. THE POOL IS OPENED FROM 600AM
TO 600 PM HOW MANY HOURS WILL THE POOL SPACE
HUMIDITY EXCEED THE 65 ??
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LUBBOCK, TX. - ADVANCED EXAMPLE
A BUILDING OWNER HAS A POOL ENCLOSURE WHICH IS AT
LEAST 2000 SQUARE FEET. THE POOL WATER
TEMPERATURE WILL BE HELD AT 82 F WITH TWO
TELEDYNE LARSS HEATERS. THE AIR IS TO BE
MAINTAINED AT 82F AND RELATIVE HUMIDITY NOT TO
EXCEED 65. CALCULATE THE SURFACE EVAPORATION
RATE AND LATENT LOAD FOR THE SPACE (BTU/HR).
THE BUILDING IS LOCATED IN LUBBOCK TEXAS. THE
OWNER INDICATES THEY WOULD CONSIDER USING HEATING
ONLY FOR MAKE UP AIR. HOW MUCH MAKE UP AIR IS
REQUIRED TO DEHUMIDIFY THE POOL KEEP THE POOL
BELOW 82 65 RH? THE OWNER WILL ACCEPT
RESPONSIBILTY FOR EXCESSIVE HUMIDITY FOR 10 OF
THE TOTAL HOURS OF OPERATION (12 HOURS BETWEEN
600 AM 6PM)
HINT USE THE FOLLOWING FORMULA ZONE CFM
LATENT LOAD IN SPACE (BTU HR) / (WI - WO).68 WI
INSIDE HUMIDITY RATIO (GRAINS) WO OUTSIDE
HUMIDITY RATIO (GRAINS)
ANSWER ZONE CFM 82,000/(101-90).68 12,000
CFM CHECK AIR CHANGES VELOCITIES
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MUA HEATING ENERGY ANALYSIS HOUR BY HOUR ANALYSIS
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MUA ENERGY ANALYSIS INPUTS
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MUA ENERGY ANALYSIS INPUTS
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ATLANTA, GA - MANUFACTURING PLANT
OWNER NEEDS 10,000 CFM MAKE UPAIR 24 HOUR
OPERATION THE OWNER WANTS THE PLANT TO BE ABOVE
15 RH AT A SPACE TEMPERATURE OF 70F.
WHAT WOULD YOU RECOMMEND ????
7015 RH - 16.2 GRAINS FROM PSYCH CALC. USE MUA
TO DETERMINE INDIRECT OPTION DIRECT FIRED OPTION
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COMMERCIAL HEAT LOSS ENERGY ANALYSIS PROGRAM
DEVELOPED SPECIFICALLY FOR HEATING, VENTILATION
AND MAKE UP AIR APPLICATIONS. ACTUAL HOURLY
WEATHER DATA, IN LIEU, OF CURVE FIT OR AVERAGED
24 HOUR DATA. REPLACES THE HEATING DEGREE DAY
PROCEDURE USED TO ESTIMATE ENERGY
REQUIREMENTS HOURLY WIND SPEED TO ESTIMATE
INFILTRATION AND ENERGY CONSUMPTION. PREDICTS
HUMIDIFICATION COSTS DUE TO VENTILATION AND
INFILTRATION MOISTURE LOSSES.
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COMMERCIAL HEAT LOSS ENERGY ANALYSIS PROGRAM
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HEAT LOSS FRONT SCREEN
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WALL CALCULATOR - DETAILED ANALYSIS
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HEAT LOSS OUTPUTS
USER MAY WISH HEAT LOSS PRINT OUT EXIT PROGRAM
- NO FILE SAVING ABILITY
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ENERGY ANALYSIS
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ENERGY ANALYSIS OUTPUT
PROVIDES A QUICK SUMMARY OF TOTAL ENERGY COSTS
FOR HEATING HUMIDIFYING THE BUILDING ABOVE THE
BALANCE POINT TEMPERATURE. SUMMARIZES NUMBER OF
ACTIVE HEATING HUMIDIFYING HOURS
SUMMARIZES CALCULATED WINTER DESIGN CONDITIONS
AND CAPACITY REQUIREMENTS.
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DETAILED OUTPUTS
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ENERGY RECOVERY - ENERGY PAY BACK ERSA
SELECTION ENERGY ANALYSIS
ALL VARIABLES MAY BE CHANGED..
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CABINET FURNACE - CAUA SELECTION PROGRAM
TARGET AUDIENCE IS MAINLY DISTRIBUTOR ALLOWS
COMPUTER PERFORMANCE FOR INFINITE
CONDITIONS ALLOWS DISTRIBUTOR TO EASILY PACKAGE
AIR COOLED CONDENSER WITH OUR FURNACE AC
COILS PRINT OUT CAN BE USED AS SUBMITTAL -
APPEARS PACKAGED (ESPECIALLY CROSS
PLOT). INCLUDES FAN CURVES FOR DIRECT AND
BELT INCLUDES ALTITUDE CORRECTIONS ALLOWS FOR
SOME CONDITIONS OUTSIDE OF THE CATALOG
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CAUA SELECTION PROGRAM - COOLING HEATING
WHY 45 F ???
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CAUA ILLUSTRATIONS
SIZE 300 10 TON COIL _at_ 4000 CFM, 80/67 - 45F
SUCTION TEMP NOTE SENSIBLE LATENT CAPACITY-
94/30 LEAVING AIR TEMP 58.6/57.2 CHANGE TO 95/75
ENTERING WHAT HAPPENED ?? CHANGE BACK TO
80/67 CHANGE SUCTION TEMP TO 40F WHAT HAPPENED
?? CHANGE BACK TO 45 F CHANGE AIR FLOW FROM 4000
TO 3200 WHAT HAPPENED ?? CHANGE BACK TO 4000
CFM CHANGE ELEVATION FROM SEA LEVEL TO 6000
FEET WHAT HAPPENED ?? CHANGE BACK TO SEA
LEVEL CHANGE ENTERING CONDITIONS TO 80/61 WHAT
HAPPENED ??
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COOLING SELECTIONS
DISTRIBUTOR CONDENSING UNITS ARE RATED AT 45 F
SUCTION TEMP AT 95F OUTDOOR AMBIENT 45 F IS USED
BECAUSE MOST AIR CONDITIONING PROCESSES NEED
DEHUMIDIFICATION. TYPICALLY 55 F LEAVING
TEMPERATURE IS USED SO THAT SPACE RELATIVE
HUMIDITY IS AROUND 50 RH AT 75 F SPACE
TEMPERATURE. A 10 DEGREE DIFFERENCE BETWEEN
SUCTION TEMPERATURE AND LEAVING AIR IS VERY
COMMON (IE. LEAVING AIR AT 55F) TYPICALLY A
DISTRIBUTOR WILL LOOK AT ONLY THE LEAVING DRY
BULB AND SENSIBLE CAPACITY REQUIREMENTS. WHILE
NOT PERFECT, SELECTING A RATED 7.5 TON
CONDENSING UNIT AND MATCHING THIS WITH A NOMINAL
7.5 TON EVAPORATOR AT 45F SUCTION TEMP IS
ADEQUATE FOR A 7.5 TON AIR CONDITIONING
LOAD. COIL VELOCITIES BELOW 500 FT. MIN ARE
RECOMMENDED
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CROSS PLOT FEATURE ALLOWS DISTRIBUTOR TO PICK
CATALOGED CAPACITIES AT VARIOUS OUTDOOR AMBIENTS
AT SUCTION TEMPERATURES OF 35 50. CROSS PLOT
DETERMINES THE BALANCE BETWEEN EVAP CAPACITY AND
CONDENSING UNIT.
CONDENSING UNIT PERFORMANCE CURVES ARE TYPICALLY
AVAILABLE ABOVE 6.25 TONS
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CROSS PLOT
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OUTSIDE AIR / TONNAGE GUIDELINES
Max Outside Air Vs. Outdoor Ambient For Typical
Light Commercial Office Application
NOTE FOR 100 OUTSIDE AIR APPLICATIONS, THE CFM
PER TON CAN RANGE FROM 155 CFM/TON IN FLORIDA TO
200 CFM/TON IN ARIZONA. IF NOT KNOWN ESTIMATE
180 CFM/TON AS AN AVERAGE 100 O.A. VALUE WHEN
MAKING BALL PARK ESTIMATES. TAKE KNOWN CFM /
200 TO DETERMINE ESTIMATE OF COOLING NEEDED.
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100 OUTSIDE AIR / TONNAGE GUIDELINES
LEAVING AIR TEMP OUTSIDE AIR CONDITION OUTSIDE
AIR CONDITION 95/76 95/78 CFM/TON CFM/
TON 63/62 231 197 62/60 206 178 60/59
196 170 55/54 159 142 53/52 148 133

EXAMPLE CONTRACTOR REQUESTS COOLING TONNAGE
NEEDED FOR 5000 CFM OF 100 OUTSIDE AIR. WHAT
WOULD IS YOUR ESTIMATE OF THE COOLING COIL TONS
REQUIRED?