7/28/2019 Cpp Id Fan Vfd Savings Amtech
1/1
APPLICATION
CASE STUDY
Regd.Office & Factory: E-6, GIDC, Electronics Zone,
Gandhinagar - 382 028, Gujarat (India)
Phone : 079-23289101, 23289102, 23289103 Fax : 079-23289111 Gram
: AXPERT E-Mail :[email protected]
AMTECHDOC.NO. : AMTCS-35
TITLE : I.D. FAN Page : 01 of 01
HOST ORGANISATION : GRASIM INDUSTRIES, NAGDA, M.P
PERFORMED BY : AMTECH ELECTRONICS (I) LTD.
INDUSTRY : GRASIM POWER-HOUSE
APPLICATION : I.D. FAN
MOTOR DATA : 3 PHASE AC INDUCTION MOTOR
RATING = 90KW / 125HP RPM = 742
CURRENT = 192 Amp. VOLT = 415V, 3 PHASE.
PREVIOUS SYSTEM : In 40 Mw power plant for maintaing 103-105
T/hr. (Tonns / Hour) steam pressure, twoboilers are used. Each
having two I.D. Fan with 90 kw motor along with damper valves&
IGP operated from Remote station.
PROBLEM OBSERVED : 1. Very high starting current kick. ( About 5
to 6 times of full load current )
2. Regular maintenance for damper valves & IGP valves.3.
Steam loss due to damper & IGP valves leakages.
PRESENT SYSTEM : Right row same steam pressure is obtain with
fully opened damper valve & IGP. Andworking with three I.D. Fan
(Two in boiler-1 & only one in boiler-2) with speed
controtechnique through AXPERT AC Variable frequency drive control
from remote station.
SYSTEM BLOCK DIAGRAM
:
ADVANTAGES OF NEW SYSTEMS :
(1) Energy saving (2) Soft-start action, limits starting current
kick.
(3) Free from mechanical maintaince of damper valves & IGP
valves. (4) Inbuilt protection feature take care of motor.
(5) Accurate steam pressure control, beacuse of fine speed
control
through AXPERT AC VFD.
ECONOMIC ANALYSIS :
Previous System = ID1 80 KW/h (DOL) ID1 80 KW/h (DOL)KW
consumption ID2 80 KW/h (DOL) ID2 80 KW/h (DOL)
160 KW/H IN BOILER - 1 160 KW/H IN BOILER - 2Total KW
consumption = 320 KW/h
With Axpert VFD = ID1 80 KW/h (DOL) ID1 50 KW/h ( Axpert)KW
consumption ID2 50 KW/h (Axpert) ID2 OFF (DOL)
130 KW/h 50 KW/hTotal KW consumption = 180 KW/h
FD1
FD2
PA Fan-1
PA Fan-2
ID2 Fan-2
ID1 Fan-1
(DOL) 250KW
(DOL) 250KW
(DOL) 120KW
(DOL) 120KW
90KW
(DOL) 90KW
HT Motor
75KWAxpert VFD
BOILER - 1100 T/hr.
FD1
FD2
PA Fan-1
PA Fan-2
ID2 Fan-2
ID1 Fan-1
250KW (DOL)
250KW (DOL)
120KW (DOL)
120KW (DOL)
90KW
90KW (DOL) OFF
HT Motor
75KWAxpert VFD
BOILER - 2100 T/hr.
COMMONSTEAM HADDEN
40 MWTurbine set
105 Tonn/hour
(steam pressure)
NET POWER SAVING : 140KW / hr.
MOTOR OPERATION : 7680 HRS / YEAR (Approx)
ENERGY SAVING / YEAR : 10,75,200 KWH / YEAR
TARIFF RATE RUPEES : 1.55 / UNIT (Minimum)
ENERGY SAVING / MONTH : RS.1,38,880 / MONTH (Approx)
ENERGY SAVING / YEAR : RS.16,66,560 / YEAR (Approx)
PAYBACK PERIOD : 4 MONTHS
+
+
BOILER-1 BOILER-2
mailto:[email protected]:[email protected]
