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Date: July 29, 2015
Philip Pai-Pin Chen
Please note:
These information Original, Wrote, Copy and
shown in year 1999-2000, and posted in year 2007, Materials shown below not for
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Thanks-Philip Pai-Pin Chen
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Thanks-
Philip Pai-Pin Chen-dated on February 21, 2015.
April 9th, 2007(First issued in year 2007
or later)
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Subject:
“M&E Design Data Bank”
RE:
Gen.Set
HVAC questionnaire
to be issued to Electrical Department
Project:
Date:
HVAC
Project Engineer:
Electrical
Project Engineer:
A.
Engine
1.
Engine
Generator Capacity (full load KW)
2.
Type of
Engine:
a.
Gas.
b.
Diesel.
c.
Turbine.
d.
Other.
3.
Engine
generator make design will be based on:
4.
Engine
generator overall sizes:
a.
Length:
b.
Width:
c.
Height:
5.
Number of
engines generators working simultaneously:
B.
Fuel System
1.
Is transfer
pump part of and mounted on engine?
a.
Max. Total
suction head (ft) (lift and line resistance)
b.
Capacity
(gpm)
2.
a.
Is day tank part of engine:
c.
size:
d.
Controls
furnished with day tank:
(1)
High Alarm
(2)
Pump Off.
(3)
Pump on.
(4)
Low Alarm.
e.
Pipe
connection sizes:
(1)
Suction.
(2)
Return.
(3)
Overflow (if
Required).
3.
Day tank
furnished separately:
4.
Size per
engine (gal)
5.
Fuel oil
pumping rate per engine.
6.
Type of
fuel.
7.
Other:
C.
Radiator
1.
Radiator
& fan mounted on engine block skid (engine drives radiator fan).
a.
Comes all
inter-connecting piping between radiator & engine with the unit.
b.
If not what
external piping has to be furnished?
c.
Are
vibration isolators for engine block skid to be furnished separately?
2.
Radiator and
fan remotely located from engine (but in same room).
a.
Radiator
cooling water pipe connecting sizes.
b.
Cooling
water flow: gpm
c.
Location of
radiator.
d.
Radiator
make design will be based on:
3.
Radiator and
fan remotely located from engine (outside of engine room).
a.
Location.
b.
Elevation of
radiator in relation to engine (ft.).
c.
Radiator
cooling water pipe connecting sizes.
d.
Cooloing
water flow (gpm).
4.
What
equipment is part of radiator?
a.
Surge tank.
b.
Ventiline
from radiator to surge tank.
c.
Vacuum
breaker.
d.
Thermometer
wells.
e.
If surge
tank is not part of radiator furnished by radiator manufacturer what size is
required?
D.
COOLING
WATER SYSTEM
1.
Volume
a.
Engine only
(gall.)
b.
Radiator for
max. ambient of 110 deg. F.
c.
Radiator for
max. ambient of 125Deg. F. (gal).
2.
Water pump
performance (pump furnished with engine).
a.
Is pump
mounted on the engine.
b.
Jacket water
(1)
capacity at ft.. (gal)
(2).
Capacity at ft.
(4)
Maximum
allowable static head (ft).
(5)
Cooling
water pipe connecting sizes.
(6)
Internal
pressure drop through equipment.
3.
Auxiliary
water
a.
Lub oil
cooler.
(1)
Capacity at ft. (gal).
(2)
Capacity at 0 ft (gal).
(3)
Max.
allowable static head (ft).
(4)
Cooling
water pipe connecting sizes.
(5)
Internal
pressure drop through equpment (ft).
b., Other ( )
(1) Capacity at ft. (gal).
(2)
Capacity at 0 ft . (gal).
(3). Max. allowable static head (ft).
(3)
Cooling
water pipe connecting sizes.
(4)
Internal
pressure drop through equipment (ft).
4.
Maximum
system pressure (psi).
a.
Water
jacket.
b.
After
cooler.
c.
Radiator.
d.
Lub oil
cooler.
e.
Other
( )
5.
Can heat
exchange be mounted on the engine and be part of it?
a.
Size.
b.
Capacity.
c.
Connecting
pipe sizes.
E.
Heat
Rejection
1.
To jacket
water (including standard mainfold, after cooler, oil cooler )
(Btu/min)
2.
Maximum
jacket water temperature (Deg.F).
3.
Radiator
data
a.
Air flow
through radiator with air entering radiator at:
(1)
95Deg.F
(CFM)
(2)
105 Deg.F.
(CFM)
(3)
110 Deg.F.
(CFM)
(4)
120 Deg.F
(CFM)
l
HVAC design
guide calls for 110deg. F. entering temperature when radiator is in the same
room as tne engine.
b.
Maximum
allowable external static pressure at discharge side of radiator (in”).
F.
ENGINE ROOM
VENTILATION REQUIREMENTS
1.
COMBUSTION
AIR REQUIREMENTS AT 85Deg.F.
2.
Heat
radiated by engine (btu/min)
3.
Heat
dissipated by generator (Btu/min).
4.
Ventilation requirements
(based on 15Deg F. Delta T) (CFM) (engine and generator radiated heat only).
G.
EXHAUST
SYSTEM
1.
Gas
Volume (CFM).
2.
Gas
temperature (Deg.F).
3.
Max.
permissible back pressure (in).
4.
Exhaust pipe
size connection at engine.
5.
Exhaust pipe
size based on:
a.
ft straight
horizontal pipe.
b.
Ft vertical
pipe.
c.
Elbows.
6.
Muffler Data
a.
Size.
b.
Weight.
c.
Flexible
Connection (by whom).
7.
Exhaust
stack size bases on:
a.
number of
engines operating simultaneously.
b.
Ft
straight horizontal pipe.
c.
Ft
vertical pipe.
d.
Elbows.
8.
Crank-case
breather vent piping.
a.
connecting
size at engine.
b.
Pipe size.
H.
DIESEL
LUBRICATING SYSTEM REQUIREMENTS
1.
Is pump
mounted on engine and part of package?
a.
Pump
Capacity:
(1)
gpm.
(2)
Head (ft)
2.
Flow gpm.
3.
External
pipe size requirements.
4.
Storage or
reservoir capacity (gal)
I.
STARTING
SYSTEM
1.
Air system.
a.
Min. air
pressure required at motor (psi).
b.
Max. air
pressure allowed at motor (psi).
2.
Others.
_________________________________________________________
Subject:
M&E Design Data Bank
Re: Em.
Gen. Set
__________________________________________________________
1.
GENERAL
The
intent of this Design Guide is to outline the procedure to follow in designing
standby power plants for use as an alternate source of power in the event of
failure of the normal electrical service. It does not cover other alternate
sources of power which may be required or permitted by Code (i.e., battery
system, tapping ahead of main switches of two separate services, etc.). Costs
are also not included as they will vary with each project.
2.
CRITERIA
a.
Tabulate the
load which is to be on the emergency system. Include the following:
(1)
Minimum
emergency loads required or recommended by Code:
(2)
Emergency
loads required for standby power plant auxiliary equipment, including:
(3)
ADDITIONAL
EMERGENCY LOADS REQUESTED BY Owner.
(4)
Additional
emergency loads recommended by Consultants, PPC/ADSC and approved by Owner.
b.
List the sum
of loads from 'a" above as follows:
_____________________________________________________
EMERGENCY
LOADS HP KW P.F. KVA D.F. DEMAND
KVA
______________________________________________________
(a).Sum
of
incandescent
1.0
lighting
loads
(b).Sum
of
electrical
1.0
heating
loads
©. Sum
of fluorescent
and
mercury
loads
.9
(d).
Individual motor
loads
(2)
TOTALS
Conn.
HP:
Conn.
KW:
Conn.
KVA:
Demand KVA:
___________________________________________________________
Notes:
(1)
Power
factors for motors normally vary from .80 to .95.
(2)
List only
the largest motors that are to operate on emergency simultaneously.
(3)
HP x .746/
Motor Efficency = KW; KW/P.F. =KVA;
KVA x
D.F. = Demand KVA
P.F.
(System) = KW ( Conn.
)/ KVA ( Conn.
)
c.
Using the
demand KVA and system power factors obtained in 'b" above, select the
generator as fellows:
(1).
Add spare (as required).
(3)
Subtract
any loads included in 'b' which will be put on emergency manually only when the
load conditions allow it (selective loading).
(4)
Select next
higher size generator (continuous rating) available from at least three of the
base bid manufacturers listed.
(a)
Ideal.
(b)
Electric
Machinery
(c)
Delco.
(d)
G.E.
(e)
Century.
(f)
Westinghouse.
(5). Using selected generator, calculate voltage dip due to
starting of single motor, ( or simultaneous starting of group of motors) with
largest locked rotor KVA. Use manufacturer's tables for calculating dip. If dip
exceeds 5%, recalculate based on next higher generator size or investigate use
of reduced voltage starters on the motors.
(6). Determine generator output voltage by weighing the
following factors:
(a)
Normal
operating voltage(s) of equipment on emergency.
(b)
Cost, space
and weight of transformers.
(c)
Cost of, and
spare required for , distributing wiring.
(7). Size generator 3 phase main fused switch or circuit
breaker as follows:
(a)
Continuous
current rating:
I = KVA
Gen./(1.732 x E Gen. Line to Line)
(b)
Interrupting
Rating: Determine from generator manufacturer maximum three phase fault current
available and rate accordingly.
(8). Generator grounding : For normal applications , directly
grounded wye connection and frame of generator to cold
water main or driven ground rods. Where generator line to
ground fault current exceeds three phase fault current
either:
(a)
Specify
generator capable application of withstanding greater fault current and
increase interrupting rating of generator main fused switch or circuit
breaker accordingly, or
(b)
Furnish a
low-value reactor or resistor in ground conductor which will limit line to
ground fault current to a value between 25% and 100% of three phase fault
current.
(9)
Check Code
regulations on generators:
(a)
Taichung, Taiwan: Article ?
(b)
Taiwan
: NFPA # ?, Article ?
(c)
National:
NFPA #? , Article ?
d.
Select
engine as follows:
(1)
Determine
type of engine and fuel to be specified, using the following as a guide:
(a). Diesel engine: Most commonly used, most familiar to
maintenance engineers, large selection of sizes. Howerever, require inertia
block. Specifify at highest speed available in order to reduce weight weight
and cost. Specify for use with #2 diesel oil (lowest sulphur content fuel
commonly available).
(c)
Gasoline
Engine:
(d)
Natural Gas:
(e)
Turbine:
(2)
Determine
basic engine BHP required for selected Generator units.
IEEE.MOBI,
PAI-PIN CHEN
@ Dot,
Optical Pacific Rim, Asia
Jan.03,
2007(FIRST ISSUED).
July 29,
2015, 2015 (third issued).
Filled.
ieeemobippcpeAT Dotcom, nyseasiaworldwide.com.
