MIL-HDBK-1191
conditions of the alternate power source as indicated in NFPA-99 and 110, and
will include as a minimum the following: battery and battery charger
malfunction, engine generator run status, engine generator alarms, and less
than 3 hours fuel supply in the day tank and 24 hours supply in the main
storage tank. A separate audible and visible derangement signal will be
provided within the hospital at a location that is continuously monitored.
Location will be as indicated in Section 11, "COMMUNICATIONS, INFORMATION
SYSTEMS, and SIGNAL SYSTEMS." This derangement signal will be appropriately
labelled but need not display individual alarm conditions.
FUEL STORAGE TANKS. The fuel storage tanks and installations in
10.3.15
Hospitals will comply with NFPA-30, "Flammable and Combustible Liquids Codes,"
and Local, State, and Federal Environmental Protection Agency requirements.
The capacity of the fuel oil tank will be sized to the nearest standard size
for a fuel storage use capacity of normal usage which will be not less than a
4-day supply at full load. A larger or smaller tank may be supplied as the
local fuel supply conditions permit. If underground fuel storage tanks are
required, they shall be double wall with leak detection in accordance with the
Environmental Protection Agency (EPA) standards. Separate day tanks, with an
overflow back to the main storage tank, will be provided for each engine
generator set and will be sized (not less than 4 hours operation at full load)
as follows:
50 kW to 100 kW generator: 25
gallon
min.
- 50 gallon
max.
101 kW to 200 kW generator: 50
gallon
min.
- 75 gallon
max.
201 kW to 300 kW generator: 75
gallon
min.
- 100 gallon
max.
Over 300 kW generator
: 100
gallon
min.
- 250 gallon
max.
A set of duplex transfer pumps will be provided for each fuel storage tank.
Each fuel transfer pump will be sized to accommodate all generators including
future set. All electric fuel tank and related fuel transfer pumps shall have
power available at all times. Provide fuel filtering equipment as recommended
for the generators and the local site conditions. Natural gas or comparable
gas fuel will not be used as an operating fuel for hospital emergency power
generation.
WARNING: Number 2-diesel fuel can be used in lieu of Number 2-heating
fuel. However, number 2-heating fuel can not be used in emergencies as a
substitute for number 2-diesel unless the flash point is 125oF, cetane number
is 40 and the average Btu/gal is 141,800 (See ASTM D975 for more details).
10-10
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