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ClimaDry Whole House Dehumidication - ClimateMaster Geothermal Heat Pumps - Rev.: 18 April, 2008B
4
the only consideration necessary. In this case, sensible
load is immaterial. Example latent capacities for a
typical ClimateMaster heat pump are shown in table 1.
ClimaDry is especially useful in Northern Climates,
where the heat pump may be oversized in the cooling
mode to provide enough heating capacity. Units with
ClimaDry will compensate for these applications
by operating as a whole house dehumidier when
necessary to maintain space Relative Humidity (RH).
Since the ClimaDry option is internal to the unit,
installation is much easier than a separate whole house
dehumidier. Plus, an additional compressor and
controls can be eliminated, simplifying the system and
lowering operating and installation costs.
Table 1: Typical Unit Latent capacity
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
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
70 16.9 15.8 5.0 7.2
Figure 1: Example Size 036 Performance
Dividing the latent capacity by
1,069 BTU/LB of water vapor at
80°F DB and 67°F WB [26.7°C
DB and 19.4°C WB] moist air
enthalpy, converts the amount
of moisture removal to pounds
per hour (multiply pounds per
hour by 0.4536 to obtain kg/hr).
Calculations are shown in gure 1.
Performance Data
Model 036