DATE: August 19, 2019,MONDAY.
PRIMARY: “ MISSION
ESSENTIAL, ESSENTIAL AND GENERAL, INC.”- FOR CURRENT AND COMING YEARS.
PAI PIN CHEN, INTERNET.
NYSEASIA, NYPEASIA,
NYCEASIA/Special Project Related
Date: August 19, 2019, MONDAY. Memo.#1 PPC/ADSC/PCA
Subject: M&E Design Data Bank
RE: Gen.Set
HVAC questionaire 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.
File:TTII.PPC.Memo.#36.10.08.99
CC: PM of each Trade
TTII/Special Project
Related
________________________________________________________________
Date: AUGUST 19, MONDAY,
2019. Memo.#2 PPC/ADSC/PCA
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 as follows:
BHP = Generator KW
(continuous rating)/ (.746 x Generator Full Load Efficiency*)
l Normally varies
from .9 to .96.
Verify from at least three
of the base bid manufacturers indicated below that engine furnished for
selected generator has a BHP equal to or greater than that calculated.
BASE BID MANUFACTURER Range of equipment available
( Continuous KW @ .8 P.F.)
Diesel Gasoline Nat. Gas Turbine RPM
(a) Onan 3-450 -- -- -- 1800
(b) GM 20-750 1800
750-2500
900
(c) Cummins %0- ? 1800
Refer to Manuf. List and
Data
(3)
Check Code regulations on combustion engines and
turbines:
(a)
NYC: Building Code, Article ?
(b)
Natioanal :
NFPA #37.
(c)
Taiwan :
e.
Size fuel oil storage tanks (the fuel oil system
should be specified under HVAC Work. Coordinate.) as follows:
(1)
Minimum 24 hour capacity.
(2)
Diesel engine fuel consumption rate: Approximately
1/10 gallon /KW/Hr.
(3)
For other engines, refer to manufacturer’s
ratings.
(4)
CheckmCode regulations on fuel oil systems:
(a)
NYC : Building Code Section :
(b)
National: NFPA #
(c)
Taiwan:
f.
Determine air requirements for combustion and
cooling in conjunction with HVAC Departmrnt and as follows:
(1)
Air (cooling) :
from manufacturer’s data, get information for CFM of air required to
cool engine block and cool radiator water. Room temperature not to exceed 110
Deg. F; base on design condition of 95 Deg. F outside air.
(2)
Air (combustion) : CFM = 4 x KW (for diesel
engines; for all others refer to manufacturers data).
(3)
Air (total ) = Air (cooling) + Air (combustion).
(4)
Determine function and type of radiator fan with
HVAC Dept.:
(1)
Mounted on engine shaft or remotely.
(2)
Cooling water only or cooling water and exhaust
air from engine-generator room. Cooling water = Jacket and aftercooler water.
(3)
For remote radiator installations:
(a)
Provide flexible connections for piping.
(b)
Provide expansion tank mounted above radiator.
(c)
Avoid mounting radiator more than 50” above engine-generator
since the fittings for the cooling system are not rated for any greater
pressure head. If radiator is located more than 50’ above engine-generator,
provide heat exchanger between radiator and engine.
(4)
Base bid manufacturers for remote radiator installations:
(a)
Perfex
(b)
Young
(5)
In lieu of remote radiator investigate use of
cooling tower or heat exchanger.
(6)
Select type of silencer (coordinate with
acoustical consultant):
(1)
For turbocharged engine exhausts – low degree
type:
(a)
Industrial areas – Similar to Max.
(b)
Semi-industrial areas – similar to Max.
(c)
Residential or hospital areas – similar to Max.
(2)
for naturally aspirated engines, intakes and
exhausts- medium degree type:
(a)
Industrial areas – similar to Max.
(b). Semi-Industrial areas – similar to Max.
(d)
Residential
or hospital areas – similar to
Max.
(3)
For critically quiet areas- high degree type –
similar to Max.
(4)
Coordinate exhaust piping from silencer with HVAC
Dept. (See trade coordination sketch).
(5)
Base bid manufacturers:
(a)
Maximum.
(b)
Burgess- Manning.
(c)
Kitell.
(d)
Koppers.
i.
Select type of batteries for engine –cranking or
turbine starting system.
(1
Lead-acid type:
Less expansive than nickel cadmium (15%); battery life slowly
deteriorates; life expectancy of about five (5) years.
(2)
Nickel Cadmium type: More Costly, Lighter and
smaller than lead-acid type; Life expectancy of about twenty years;
deteriorates quickly upon reaching life
expectancy.
(3)
Size, number and voltage of batteries are
dependent upon the following and the engine manufacturer should recommend
batteries suitable for these parameters.
(a)
Engine or turbine breakaway current.
(b)
Engine or turbine spinning current.
(c)
Number of consecutive starts.
(d)
Ambient temperature.
(4)
Base bid manufacturers:
(a)
Nife.
(b)
Exide.
(c)
Gould.
(d)
C&D.
j.
Miscellaneous:
(1)
Determine location and type of engine –generator
set controls, meters and alarms.
(2)
Determine maximum elapsed time to deliver full
load (normally 15 seconds, hospitals 10 seconds).
(3)
Investigate use of load banks for testing.
(coordinate with HVAC for ventilation.)
(4)
Furnish normal power supplies for the following
equipment associated with the standby power plant:
(a)
Jacket water heater.
(b)
Unit Heater.
(5)
Furnish battery operated emergency lights for
engine-generator room.
(6)
Investigate use of enclosure (if an outdoor units,
with pitched roof and gutters).
(7)
Coordinate with HVAC department (see Trade
Coordination Sketch, type, size and location of flexible connections for:
(a)
Fuel oil piping.
(b)
Exhaust piping.
(c)
Direct duct connections.
(d)
Silencer drain connection.
(8)
Coordinate noise and vibration control
requirements with acoustical consultant, (in NYC, also comply with Building
Code Section) including the following:
(a)
Inertia blocks.
(b)
Vibration eliminators.
(c)
Type of silencer.
(d)
Baffles for air intake and exhaust.
(e)
Sounding of enclosure and/or room.
(9)
Coordinate Standby Power Plant room floor drains
with Plumbing Department (See Trade Coordination Sketch).
3.
PHYSICAL CRITERIA
A.
Criteria for Locating Equipment:
(1)
Prior to establishing location of equipment,
consider effects on the following:
(a)
Space for ventilation and piping requirements.
(b)
Noise and vibration to surrounding areas.
(c)
Structural support of equipment.
(d)
Proximity
toemergency load center (locate engine-generator as close as possible).
(e)
Maintenance( accessibility and ease of repair).
c.
Determine Space Required:
(1)
Investigate largest dimensions available from base
bid manufacturers (at least three) for equipment selected in paragraph 1.
Confirm catalog data with manufacturers.
(2)
Make layout plan and section to scale through
engine-generator room and indicate operating weights (i.e., radiator with
water) of all equipment. Forward drawing to Architect and Structural Engineer
for approval. Include the following;
(A)
Engine-Generator (with enclousure if used).
(B)
Base (Standby Plant steel base on concrete pad).
(C)
Radiator and piping.
(D)
Battery rack.
(E)
Day tank.
(F)
Fuel oil storage tank, pumps and piping.
(G)
Silencer and exhaust piping.
(H)
Controls and switchgear.
(I)
Openings for related ductwork, louvers, piping and
conduits.
(J)
Location of drains for engine-generator room and
from silencer.
(K)
Miscellaneous (i.e., rectifiers, unit heaters,
transformers, load banks, etc.).
(3)
Maintain minimum clearance around engine-generator
set as follows:
(a)
Engine end:
2’-6”
(b)
Generator ends:
4’-0”
(c)
Sides: 3’-0”
(d)
Top: (Check
clearance for silencer, cylinder removal, piping, ductwork, etc. Avoid any
unnecessary ducts, piping and equipment above engine.)
(e)
If unit has enclosure, swing of panels may
increase minimum clearance of (a),(b),and (c) above.
(f)
Include space and weight allowances for any future
equipment.
(4)
Include space and weight allowances for any future
equipment.
(5)
Rigging space- clear path for equipment entry to
room and check structural capability of holding weights. If existing building,
survey route and alert Architect of existing utilities and other obstructions
which must be disconnected and/or removed.
Also, verify adequate
space for possible later removal of largest piece of equipment for maintenance.
4.
FILING REQUIREMENTS
A.
NYC
(1)
Building Department:
General.
Fuel oil tank, fill and
vent lines.
Fuel oil piping (if above
grade).
Exhaust.
(2)
Con Edison:
Single Linediagram.
Letter of Intent from
owner.
(3)
Bureau of Gas and Electriccity:
Generator main protective
device (if over 1000 KVA total capacity)
b.
Other areas: Check local requirements.
c.
Do not test installation of standby power plant
until all approvals have been received from local authorities.
J.
5.
PHYSICAL CRITERIA
6.
FILLING REQUIREMENTS
PS: FOR YOUR, AND MY PROJECTS, PLEASE CONTACT ME VIA MY EMAILS:
II.
NYSEASIA@YAHOO.COM.
III.
NYSEASIA@AOL.COM.
IV.
NYSEASIA@YAHOO.COM.
THANKS.PAIPINCHEN.COM.
August 19, 2019, MONDAY.
END.
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