kotte mc ea
DESCRIPTION
Energy Audit reportTRANSCRIPT
-
Super Market Welikada Kotte Municipal Council
Energy Auditor: Ruwan Wijemanne (B.ScEng.Hons)
Organized By:
Sri Lanka Sustainable Energy Authority Conducted By:
EnerFab Pvt Ltd 20, First Lane, Koswata Road, Nawala
-
Content
Introduction
History Bill Analyse
Load Profile
Energy Saving Opportunities
-
Building Introduction Location : Rajagiriya
Description : 4 storied Building, Sheet roof,
Court yard
Usage : 70 Shops, Public Library
Operation : 7.00 am 9.00 pm
-
Energy Background Grid Electricity and Solar Power are main energy
sources to the building
Bill Scope : Library, Common area (Corridor, Wash
rooms, Outdoor lighting)
Service Provider LECO
Tariff GP2
Monthly Energy Consumption 1,775 kWh
Maximum Demand 11 kVA
Monthly Bill 58,000.00 Rs.
-
History Bill Analyses Total electricity bill of common area for 14 months
0
2
4
6
8
10
12
14
16
18
20
0
500
1000
1500
2000
2500
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb
Dem
an
d (
kV
A)
En
erg
y (
kW
h)
Energy Demand
-
History Bill Analyses Time of Use Energy Consumption
0
200
400
600
800
1000
1200
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb
To
U E
nerg
y C
onsum
ption (
kW
h)
Day Peak Off peak
-
History Bill Analyses
Day 41%
Peak 31%
Off peak 28% Day
42%
Peak 38%
Off peak 20%
Time of Use Energy & Cost Share
Energy
Share
Cost
Share
-
End User Profile
Utility wise energy consumption
Light 71%
Lift 7%
Pump 1%
Fan 18%
Other 3%
-
Load Profile Demand and Power Factor Variation
0.500
0.550
0.600
0.650
0.700
0.750
0.800
0.850
0.900
0.950
1.000
0.000
2000.000
4000.000
6000.000
8000.000
10000.000
12000.000
12:1
51
4:1
51
6:1
51
8:1
52
0:1
52
2:1
50
:15
2:1
54
:15
6:1
58
:15
10:1
51
2:1
51
4:1
51
6:1
51
8:1
52
0:1
52
2:1
50
:15
2:1
54
:15
6:1
58
:15
10:1
51
2:1
51
4:1
51
6:1
51
8:1
52
0:1
52
2:1
50
:15
2:1
54
:15
6:1
58
:15
10:1
51
2:1
51
4:1
51
6:1
51
8:1
52
0:1
52
2:1
50
:15
2:1
54
:15
6:1
5
Po
we
r F
ac
tor
Dem
an
d (
VA
)
Time
Aperant Power: Triphasic (VA) Power Factor: Triphasic
-
Temperature Profile T & RH profile of the library under mechanical ventilation
74
75
76
77
78
79
80
81
82
83
84
28
28.5
29
29.5
30
30.5
31
31.5
0:0
0
1:0
0
2:0
0
3:0
0
4:0
0
5:0
0
6:0
0
7:0
0
8:0
0
9:0
0
10
:00
11:0
0
12:0
0
13:0
0
14:0
0
15:0
0
16:0
0
17:0
0
18:0
0
19:0
0
20:0
0
21:0
0
22:0
0
23:0
0
0:0
0
Re
lati
ve H
um
idit
y (
%)
Tem
pera
ture
(o
C)
Time (25-04-2015)
TEMPERATURE RELATIVE-HUMIDITY
-
Recommendations Tariff Switching
Switch building tariff to GP1 category from GP2
Recommendation Switch tariff to GP1 category
Energy Saving Potential 0 kWh
Annual energy cost saving 146,000.00 Rs.
-
Recommendations Power Factor Correction
Building maintain power factor at 0.9 at maximum demand
and recommended to improve power factor
Recommendation Install an automatic capacitor
Monthly Demand Saving
Potential
1.1 kVA
Likely Investment 14,400.00 Rs.
Annual Energy Cost Saving 29,600.00 Rs.
SPP 24 Months
-
Recommendations Outdoor lighting system
Replace 12 Nos of Metal Halides with 20W LED fittings
Recommendation Replace Metal halides with
30W LED cobra fittings
Monthly Energy Saving
Potential
367 kWh
Likely Investment 156,000.00 Rs.
Annual Energy Cost Saving 84,000.00 Rs.
SPP 22 Months
-
Recommendations Indoor lighting system
Replace old inefficient T8 tube light fittings with T5 lights
Recommendation Replace T8 Tube lights with
T5 tube lights
Monthly Energy Saving
Potential
276 kWh
Annual Energy Cost Saving 72,000.00 Rs.
-
Recommendations Solar Net Metering System
Install solar net metering system to generate buildings own
power.
Recommendation Install 15 kWp rooftop solar
net metering system
Monthly Energy Saving
Potential
1,800 kWh
Likely Investment 3,000,000.00 Rs.
Annual Energy Cost Saving 553,500.00 Rs.
SPP 5.4 years
-
Recommendations General
Shift peak loads to off peak or day
Attach identification name tags for each circuit breaker
Replace damaged solar panels and lamps
-
Recommendations Summary Total energy saving potential except solar net metering
Parameter Savings Present
Consumption
Saving
Percentage
Energy (kWh) 7,717 21,296 36%
Cost (Rs.) 317,000 698,000 45%
-
Questions..?
-
Thank You..!