MIL-HDBK-1003/3
part load equipment performance data. Demonstrate full and part
load equipment and system performance in the load calculation.
The following computer programs may be helpful in load
calculation:
a) Building Loads Analysis and System Thermodynamics
(BLAST). The BLAST computer program is used to predict energy
consumption, energy system performance, and energy cost in
buildings. This program computes hourly space loads, mechanical
and electrical power consumption, power plant fuel consumption,
and life-cycle costs. This program may be obtained by contacting
BLAST Support Office, Department of Mechanical Engineering,
University of Illinois, 1206 West Green Street, Urbana, IL 61801;
telephone 1-800-UI-BLAST. This program is funded by the U.S.
Army Corps of Engineers. If used by Federal agencies, this
program is free of charge.
b) Commercial Programs. Computer programs for HVAC
and dehumidifying systems are commonly available from computer
software companies or air conditioning manufacturers.
2.5
Mechanical Room Ventilation. Provide ventilation
systems for mechanical equipment rooms to limit temperature rise
due to heat release from piping and equipment. Size fans based
on a 10 degree temperature rise above the outdoor dry bulb
temperature design condition; provide thermostat control of fans.
Design ventilation systems for equipment rooms containing
refrigeration equipment in accordance with ASHRAE Standard 15,
Safety Code for Mechanical Refrigeration including refrigerant or
oxygen deprivation sensors (based on the classification of
refrigerant) and alarms, to ensure safe refrigerant concentration
levels. Pipe refrigerant discharges from pressure relief
devices, rupture members, fusible plugs, and purge units directly
to the exterior of the building.
2.5.1
Self-Contained Breathing Apparatus (SCBA). Do not
provide SCBA for mechanical refrigeration rooms, unless there
will be a full time standing watch in the room. Provide, and
maintain current, SCBA training for watchstanders, where there is
a full time standing watch.
a) The fire department or hazardous material spill
response team answering an alarm call will have SCBA available.
If they need assistance in securing any equipment, they will be
able to outfit the refrigeration mechanic with SCBA and provide
trained escorts to accompany the refrigeration mechanic into the
hazardous atmosphere.
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