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HVAC Design Review Guide 2012
Plumbing Design Review Guide 2012

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HVAC "Apps" for your Tablet 

Comprehensive collection of portable HVAC Design Software Programs to help streamline and standardize your Design Process

Programs and Calculations incorporate:

ASHRAE® guidelines and standards
SMACNA® recommendations
ASPE® guidelines and standards
Psychrometric solutions
Climatic and Altitude effects
Duct Fitting Coefficients
Extensive "Help" files
Warning Flags when outside of standard values
Traditional flow and fluids Formulas
Straightforward input and results
Over 35 years of Consulting experience
 

New - HVAC "Apps" for your Tablet            [Go To Prices/Orders Page]

  1. "Enhanced" Equal Friction Duct Sizing
  2. "Economic" Hydronic Pipe Sizing
  3. Fan Static Pressure Calcs (Preliminary)
  4. VAV-Reheat Coil Sizing
  5. AHU Cooling Coil Loads (Psychrometrics)
  6. Pump Head Calcs (Preliminary)
  7. Duct Weight and Duct Insulation Sq. Ft.
  8. Expansion Tank Sizing - Heating Water
  9. Expansion Tank Sizing - Chilled Water

 

1.  Duct Sizing - "Enhanced" Equal Friction 

This “Enhanced Equal Friction Duct Sizing” program uses a modified equal friction sizing procedure, including velocity reduction at larger air quantities.  In addition, “Enhanced Equal Friction Duct Sizing” incorporates duct sizing to avoid obstructions (such as beams) in the ceiling space (helps to avoid conflicts and potential Change Orders!). The program also includes warning flags if the space below the beam is too small and would result in duct sizing that exceeds recommended aspect ratios. (Click image to enlarge)Image5.gif (29823 bytes)

2.  Hydronic Pipe Sizing (Optimum sizes) 

This “Pipe Sizing Calculator – Optimum Economical Sizes” program uses a combination of velocity and pressure drop and includes recommended ranges of velocity and pressure to avoid erosion and air trapping problems.  In addition, “Pipe Sizing Calculator – Optimum Economical Sizes” includes pipe size selections that range from “Lower First Cost” to “Lower Operating Cost”.  This allows alternate size selection with economic trade-offs. The program also includes warning flags if the alternate size selection would result in excessive velocity that could cause noise and erosion, would result in too low velocity that could create air trapping, or would result in excessive pressure drop which could increase pump horsepower.  “Pipe Sizing Calculator – Optimum Economical Sizes” can be applied to Copper Pipe(Type L) or Steel Pipe,  on hydronic heating or chilled water systems. 

(Click image to enlarge)Image20.gif (24388 bytes)

 

3.  "Preliminary" Fan Static Pressure Calculations 

At the early stages of a project, it is desirable to estimate the static pressure requirements of the fans and air handling units, so preliminary equipment selections and horsepower requirements can be determined.  The Preliminary Fan Static Pressure Calculations assume that ductwork will be sized by “Equal Friction” or “Enhanced Equal Friction” methods.  Pressure drop allowances for fittings are based on “Equivalent Length” of straight ductwork for the various types and sizes.  Pressure drop values for “Supply Diffuser”, “Return Register”, “Filter”, and “Balancing” are also for generic equipment.  If manufacturer’s data is available for these components, the actual values may be used in place of the generic values.  Pressure drop values for “VAV Box” and “Heating or Reheat Coil” can be estimated or manufacturer’s data may be input if available.

(Click image to enlarge)hvac-a2.gif (14061 bytes)

 

4.  VAV - Reheat Coil Load Calculations 

Sizing of the reheat coil, calculation of the reheat coil load, and calculation of the reheat coil heating water flow rate are dependent on several factors.  If a zone is satisfied for cooling temperature, it is possible that the internal heat gain is not adequate to offset the room heat loss (lights may be off, people may not be in the room, equipment may be off, etc.).  To keep the room from sub-cooling, it might be necessary to energize the reheat coil.  This will increase the supply air temperature from the normal cooling supply air temperature (approximately 55 degrees F) to a temperature that will offset the space heat loss (less an allowance for any independent perimeter heating equipment capacity, if applicable). This program calculates the reheat coil load, based on the input for “Cooling Supply DB” temperature, the “Minimum VAV Air Quantity” for the zone, and the “Calculated Zone Heating Load” for the zone.  (Click image to enlarge) wpe64.gif (12407 bytes)

 

5.  AHU - Preliminary Cooling Coil Load Calculations 

Preliminary Cooling Coil Load Calculations can be used to estimate the required Air Handling Unit Cooling Coil capacity.  Preliminary Chilled Water flow rates can also be used for preliminary Pump sizing, preliminary Chiller sizing, preliminary Cooling Tower sizing, preliminary Pipe sizing, etc.  The information from the Preliminary Calculations can also be sent to the proposed Equipment Manufacturer of the Air Handling Units for finalized equipment selection and for finalized Project Equipment Schedule capacity data.   The calculations for this Preliminary Cooling Coil Load program incorporate cooling coil psychrometrics, air density corrections, altitude corrections, and indoor and outdoor design temperatures.  Different combinations of airflows and temperatures can be input for each AHU to optimize the AHU and coil performance before issuing the information to the Manufacturer for final equipment selection and for final specifications. (Click image to enlarge) wpe6F.gif (16605 bytes)

 

6.  "Preliminary" Pump Head Calculations 

At the early stages of a project, it is desirable to estimate the pump head requirements so preliminary pump selections and horsepower requirements can be determined.  The Preliminary Pump Head Calculations assume that piping will be sized with conventional pressure drop per 100 ft. of approximately 4 ft./100 ft. up to 2” size, 3 ft./100 ft. for 2 ½” to 4” sizes, and 2.5 ft./100 ft. for 5” and larger pipe.  Pressure drop allowances for fittings are based on “equivalent length” of straight pipe for the various types and sizes.  Pressure drop for “Air Separator” is based on a generic air separator, including strainer.  Pressure drop values for “Control Valve”, “Chiller”, “Boiler”, “Cooling Tower”, “Heat Exchanger”, “Cooling Coil”, Heating Coil”, and “Balancing Valve” are also for generic equipment.  (Click image to enlarge)  hvac-a1.gif (14829 bytes)

7.  Duct Sheet Metal Weight and Insulation Calculations 

A significant part of a project mechanical cost includes the ductwork sheet metal and insulation costs.  When final cost estimates are being prepared, it is important that an accurate accounting for the sheet metal and insulation quantity is provided.  The “Sheet Metal Weight and Insulation Calculations” schedule includes recommended or code required sheet metal gauges for each size duct.  A “Scrap Losses” multiplier is included, to account for scrap lost during fitting construction.  “Total Square Footage” can be used to determine insulation square footage required for the ductwork (either lined or wrapped).   Square Footage can also be used for painting estimates, where the ductwork is painted.  Weights in Pounds per Square Foot or per Lineal Foot are based on Galvanized Sheet Metal, at the gauge required by the associated duct size and configuration.   (Click image to enlarge) 

 

8.  Expansion Tank Sizing - Heating Water 

To accurately size the system expansion tank, it is necessary to calculate the total water volume in the system.  This includes the water content of all pipes, heating equipment (boilers, heat exchangers), heating coils, and any other miscellaneous equipment in the “closed loop” system.  Water expansion due to temperature changes must be accommodated by providing a place for the water to expand.  Proper sizing of the expansion tank is critical, to avoid potentially dangerous pressure increases in the system.  The Heating Water Expansion Tank sizing calculations are based on thermal expansion of the fluid in the “closed loop” system as the fluid is heated or cooled. 
(Click image to enlarge) 

wpe9.gif (10828 bytes)

9.  Expansion Tank Sizing - Chilled Water 

To accurately size the system expansion tank, it is necessary to calculate the total water volume in the system.  This includes the water content of all pipes, cooling equipment (chillers), cooling coils, and any other miscellaneous equipment in the “closed loop” system.  Water expansion due to temperature changes must be accommodated by providing a place for the water to expand.  Proper sizing of the expansion tank is critical, to avoid potentially dangerous pressure increases in the system.  The Heating Water Expansion Tank sizing calculations are based on thermal expansion of the fluid in the “closed loop” system as the fluid is heated or cooled. (Click image to enlarge) wpeB.gif (9918 bytes)

wpeD.gif (11184 bytes)

 

System Requirements
For full functionality of the Software "Apps", it is recommended that your system have at least the following configuration:

Operating System: Android or equivalent
Disk Space: 1.0 GB (recommended) for installation of all "Apps"
Software: Office Suite-Pro®, or MS Word® & MS Excel®, or equivalent 

 

Prices/Orders

ALL of the above "Apps" and Programs are available individually or are included in combined packages.   Order now to assure that you will receive the low "Limited Time Special Prices".  Go to the [Go To Prices/Orders Page] page for details.

 

 

 

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