Transcript Energy Efficiency: Load management potential savings in
Energy Efficiency: Load management potential savings in the telecommunications network in Africa
Author and Presenter; Mohammed Adamu Regional Power Expert Africa [email protected]
+233277600206
Introduction •Apart from CAPEX, generally OPEX cost driver on the telecom network are five items; •Three of them are direct Energy cost and one is indirect. •The direct Energy cost elements is typically 50% - 60% of total Network OPEX. The figure could be up to 79% in some operations.
•Above 20% OPEX savings can be achieved with load management.
• This act, in addition to savings, enable deficits in global energy, Emission of CO2 and other green house gases.
Note: this presentation focus mainly on BTS sites. This is because of the number of BTS site in a network. However similar structured frame may be applied to the core sites.
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Network Quality
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A Typical BTS Site with Shelter (Plan)
DB Equipm ent Shelter AC Tower FENCE GATE Spare Gen2 Transform er ATS Gen1 Load Public Supply
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Project Name
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Overview Five Network OPEX Driver
% age OPEX Annual Monthly YTD
Main Network OPEX Driver
Generators maintenance Sites electricity Sites fuel Sites Security Sites leases
Sum % of OPEX Driver
9 14
74
18 14 29
Quantitative Highlights of archive data Monthly YTD AVERAGE OPEX-Energy
= 61%
AVERAGE OPEX-SITE FUEL
= 29%
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Project Name
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A sample Model of Energy Efficiency Exercise Review Operations: Load New Technologies Innovative in operations process and system architecture Monitoring Design and system Selection Source Energy Sink Energy (Load) Effective Control
There are enormous savings potentials in OPEX and CAPEX of the energy system of the present telecommunications networks in Africa MM/DD/YY
Project Name
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Economics of Network Energy
With a careful site energy model, the average; Base energy/year/site estimate = 35,040 kWh Energy for daily variable/year/site estimate = 2,920 kWh Energy/year/site estimate = 37,960 kWh Archive Annual operations total Energy estimate = 165 MWh Monthly YTD-Archive Average cost of Energy per unit = 40 Cents Monthly YTD- Worst offender Average cost of Energy per unit = 82 Cents Page 6
Highlights of Focus
•
Control and reduction of Energy demand in the operation
•
Reduce resultant average cost of unit Energy on the network
•
Cost appropriation and cost transfer in equipment selection and system layout architecture Page 7
Sample data on network Energy
CASE 1: UNDER UTILISATION
SITE NAME Site Type LG 2001 PH 2007 KN 2008 Indoor Outdoor Indoor Total Capacity 11.5KVA
12.5 KVA Indoor Total Capacity % 100 100 100 Utilization % 23.5
Under-utilization. % 51.5
30 32.4
45 42.6
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Sample data on network Energy
CASE 2: IMBALANCE LOAD
3 PH Generator TOT PH CAP OPT LDING PH CAP SITE PH LOAD
CASE 2: IMBALANCE LOAD
3 PH Generator TOT PH CAP OPT LDING PH CAP SITE PH LOAD
CASE 2: IMBALANCE LOAD
3 PH Generator TOT PH CAP OPT LDING PH CAP SITE PH LOAD L1 12.8
9.6
0
LG 2001
L2 L1 13.9
10.4
4.3
PH 2006
L2 L1 17.8
13.3
7.2
KN 2008
L2 12.8
9.6
4
Indoor
L3 13.9
10.4
3.2
Outdoor
L3 17.8
13.3
4.5
Indoor
L3 12.8
9.6
5 13.9
10.4
4 17.8
13.3
5.6
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Sample data on network Energy
CASE 3: LOAD MANAGEMENT
SITE NAME Site Type LG 2001 PH 2006 KN 2008 Indoor Outdoor Indoor TELCO LD (%) 27 23 21 Battery Charging (%) 13 30 25 Cooling (%) 37 4 19 Lights (%) 14 34 28 Others (%) 9 8 7
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