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Air-conditioning coil condensate calculation software

Qcondensate

calculate coil condensate flowrate, air mixing and state point pyschrometric air properties

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Qcondensate: made design easier for everyone

Qcondensate program, an HVAC mobile design tool, performs quick calculations for AHU coil condensate, air mixing and state point psychrometric air properties. It is specially designed by a professional engineer to replace the conventional psychrometric chart (restricted scale and barometric pressure).

Aim: creating a mobile design environment (ShowMe!) for the practising engineers & designers in today's mobile world.

Results: Instant solutions at your fingertips.

Highlights:

calculate AHU coil condensate flowrate
calculate air mixing and state point psychrometric air properties
accurate formulation based on ASHRAE Fundamentals 2009.
save results to text file for printing
fully mobile program without setup requirement
in SI & IP units

AHU Coil Condensate Calculation . . .

Start collecting "green water" from AHU coil condensate today - save the water, save some money!. Performing condensate calculation is time consuming as it involves air mixing psychrometric air properties calculations. With Qcondensateprogram, it is easier than ever with solutions just a few clicks away.

Example 1: Coil Condensate + Air Mixing (in SI Units)

Find the AHU coil condensate flowrate as indicated in the schematic below:

Solutions:

Step 1: Find air mixing properties at Point 3 (on coil).

Step 2: Calculate condensate flowrate

Coil Condensate Water Calculation

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altitude (m) = 0

Q (point 3) = 4,680.0

Tdb (point 3) = 24.2

Tdb (point 4) = 13

RH (point 3) = 50.2

RH (point 4) = 90

Twb (point 3) = 17.3

Twb (point 4) = 12.1

W (point 3) = 9.45073

W (point 4) = 8.38593

Mda (point 3/point 4) = 1.5202

Condensate Flowrate = 0.0016 kg/s

Condensate Flowrate = 5.83 l/hr

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Legend:

Q = Airflow rate [CMH]

Tdb = Dry bulb temperature [°C]

RH = Relative humidity [%]

Twb = Wet bulb temperature [°C]

W = Humidity ratio [g(w)/kg(da)]

Mda = Mass flow of dry air [kg(da)/s]

Point 3 = on coil (entering air) conditions

Point 4 = off coil (leaving air) conditions

Example 2: Coil Condensate (in IP Units)

100% outdoor air at 95 ^oF DB/40% RH enters the cooling coil. The air leaves the coil at 55 ^oF/85% RH. Assuming 1000 CFM of outdoor air is being conditioned, find the condensate water collected.

Solutions:

Coil Condensate Water Calculation

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altitude (ft) = 0

Q (point 3) = 1000

Tdb (point 3) = 95

Tdb (point 4) = 55

RH (point 3) = 40

RH (point 4) = 85

Twb (point 3) = 75.1

Twb (point 4) = 52.5

W (point 3) = 0.01413

W (point 4) = 0.00780

Mda (point 3/point 4) = 69.9265

Condensate Flowrate = 0.0074 lb/s

Condensate Flowrate = 0.43 ft³/hr

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Legend:

Q = Airflow rate [CFM]

Tdb = Dry bulb temperature [°F]

RH = Relative humidity [%]

Twb = Wet bulb temperature [°F]

W = Humidity ratio [lb(w)/lb(da)]

Mda = Mass flow of dry air [lb(da)/min]

Point 3 = on coil (entering air) conditions

Point 4 = off coil (leaving air) conditions

Air Mixing / State Point Psychrometric Properties . . .

A handy psychrometric calculator - find or check air mixing and state point air properties quickly without reading a psychrometric chart.

With input Tdb + Twb or RH, Qcondensate program let you quickly find/check the the following air properties at anytime, anywhere:

Legend:

Tdb = Dry bulb temperature

RH = Relative humidity

Twb = Wet bulb temperature

Tdp = Dew point temperature

rho = Density

W = Humidity ratio

v = Specific volume

h = Enthalpy

P = Atmospheric pressure

Pws = Saturation vapour pressure

Pw = Partial water vapour pressure

Q = Airflow rate

Mda = Mass flow of dry air

Mw = Mass flow of water vapour

Example 3: Adiabatic Mixing of 2 Moist Airstreams (in SI Units)

A stream of 7200 CMH of outdoor air at 4 ^oC dry-bulb temperature and 2 ^oC wet-bulb temperature is adiabatically mixed with 22500 CMH of recirculated air at 25 ^oC dry-bulb temperature and 17.9 ^oC wet-bulb temperature. Find the thermodynamic properties of the resulting mixture.

Solutions:

The following results are performed with Qcondensate - Air Mixing module.