should include an assessment of future availability of fuels,
particularly natural gas.
1.5.2.2 Economic analysis concerning electrical energy cost should be
calculated on a monthly basis in accordance with the utility companies
rate schedule and bill monthly on a kW demand charge plus step rates
for kW-hr consumption. The present station kW demand and kW-hr
consumption shall be the base load for electrical energy calculations.
Analysis shall include the rate schedules and calculations showing
application of the schedule.
1.5.3 REVIEW SUBMITTALS
In addition to calculations and drawings, the design submission shall
include copies of the equipment selection engineering data (handwritten
worksheets) by unit number, including the following:
1.5.3.1 Air handling unit capacity and sketch of component arrangement
with physical dimensions for louvers, dampers, access provisions,
filters, coils, fans, vibration isolators, etc.
size, etc.) for all air handling units, fans and pumps for intended
modes of operation. Include fan and pump performance curves.
reclaim
1.5.3.4 Heat recovery equipment
1.5.3.5 Refrigeration equipment loading, performance and selection
1.5.3.6 Cooling tower performance, winterization (heaters) and noise
analysis
1.5.3.8 Steam PRVs, by-pass and safety valves
1.5.3.9 Typical catalog cuts of major equipment
1.6 HVAC CALCULATIONS FOR HIGHER ELEVATIONS
1.6.1 GENERAL
For sites with elevations below 1,000 feet, the effect of the change in
air density is minor and, therefore, need not be considered while
calculating the HVAC design quantities. The standard air density is
1.20 Kg/Cu M (0.075 Lb./Cu Ft), at sea level, when the atmospheric
pressure is 763 mm (29.92 inches) of mercury and the ambient
temperature is 21 degrees C (70 degrees F).
1.6.2 AIR DENSITY RATIO
For elevations higher than 1,000 feet, the density of air is less. Air
Density Ratio (ADR) should be used while converting any engineering
entity from a standard value to the actual value.
ADR = Air density at higher elevation
0.075 standard density
HVAC DESIGN MANUAL
1-23
GENERAL REQUIREMENTS
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