Post on 17-Jul-2015
transcript
ENERGY SURVEY OF THE BRIMSU
WATER SUPPLY STATION – GHANA
WATER COMPANY LIMITED
(GWCL – CAPE COAST)
Amengor, Jacob Kwasi
SUPERVISOR: Mr. Oteng Peprah, Michael
PROBLEM STATEMENT
•Rationing of water in the Cape Coast Municipality
•Limited capacity of treatment plants
•Demand exceeding supply within the municipality
02-June-14ENERGY SURVEY OF THE BRIMSU WATER SUPPLY STATION –GHANA WATER COMPANY LIMITED (GWCL – CAPE COAST)
PROJECT OBJECTIVES
• The objectives of this study are:
To determine the energy loss in the treatment process.
To determine the energy consumption in producing water.
To make recommendations for the saving of energy in the head works.
02-June-14ENERGY SURVEY OF THE BRIMSU WATER SUPPLY STATION –GHANA WATER COMPANY LIMITED (GWCL – CAPE COAST)
METHODOLOGY
The audit was carried out by using the
following steps:
•Embarking on field investigation.
•Gathering of operating data.
•Processing of data and evaluation.
02-June-14ENERGY SURVEY OF THE BRIMSU WATER SUPPLY STATION –GHANA WATER COMPANY LIMITED (GWCL – CAPE COAST)
RESULTS
The outcome of the survey is as follows;
• There was always a decrease in the volume of raw water after treatment
process. The quantity of water loss during the treatment led to a
corresponding energy loss.
02-June-14ENERGY SURVEY OF THE BRIMSU WATER SUPPLY STATION –GHANA WATER COMPANY LIMITED (GWCL – CAPE COAST)
CONT’DMONTH RAW WATER FINAL WATER WATER LOSS ACTUAL POWER POWER LOSS PERCENTAGE OF
POWER LOSS
m^3 m^3 m^3 kWh kWh %
JANUARY 571440 531930 39510 215177 14877.58 6.91
FEBRUARY 479853 449552 30301 221528 13988.70 6.31
MARCH 533327 503955 29372 239827 13208.03 5.51
APRIL 484854 451775 33079 155510 10609.62 6.82
MAY 434353 407030 27323 144105 9064.93 6.29
JUNE 665221 627565 37656 246421 13949.09 5.66
JULY 674029 625640 48389 249647 17922.33 7.18
AUGUST 680516 630113 50403 255570 18929.01 7.41
SEPTEMBER 643440 595780 47660 260034 19260.88 7.41
OCTOBER 670868 621175 49693 269362 19952.37 7.41
NOVEMBER 664872 615773 49099 256480 18940.35 7.38
DECEMBER 659198 610075 49123 256480 19112.72 7.45
TOTAL 1230638 1142005 88633 471657 33969.68 7.20
02-June-14ENERGY SURVEY OF THE BRIMSU WATER SUPPLY STATION –GHANA WATER COMPANY LIMITED (GWCL – CAPE COAST)
CONT’D
• The electrical energy consumed during the production of a cubic
meter of water was found to be within the acceptable limit based on
the range 1.0 – 2.5kWh/ 1000 gallons of water produced. The average
electrical consumption for the year 2013 was 1.57kWh/1000 gallons of
water.
02-June-14ENERGY SURVEY OF THE BRIMSU WATER SUPPLY STATION –GHANA WATER COMPANY LIMITED (GWCL – CAPE COAST)
CONT’D
02-June-14ENERGY SURVEY OF THE BRIMSU WATER SUPPLY STATION –GHANA WATER COMPANY LIMITED (GWCL – CAPE COAST)
0 50000 100000 150000 200000 250000 300000 350000
JANUARY
FEBRUARY
MARCH
APRIL
MAY
JUNE
JULY
AUGUST
SEPTEMBER
OCTOBER
NOVEMBER
DECEMBER
kWh
MO
NTH
COMPARISON OF THE ACTUAL AND THEORITICAL POWER CONSUMPTION IN kWh
ACTUAL POWER THEORITICAL POWER
CONT’D
• The water produced by the Brimsu Head works was not sufficient to
satisfy the water demand of the supply area. The water produced by
the Head works, on the average, served only 68.70% of the total
water demand leaving a deficit of 31.30%.
02-June-14ENERGY SURVEY OF THE BRIMSU WATER SUPPLY STATION –GHANA WATER COMPANY LIMITED (GWCL – CAPE COAST)
CONT’D
02-June-14ENERGY SURVEY OF THE BRIMSU WATER SUPPLY STATION –GHANA WATER COMPANY LIMITED (GWCL – CAPE COAST)
17159
16055 16257
15060
13130
20919
16997
2032619859 20038
2052519680
26,201 26,201 26,201 26,201 26,201 26,201 26,201 26,201 26,201 26,201 26,201 26,201
0
5000
10000
15000
20000
25000
30000
JANUARY FEBRUARY MARCH APRIL MAY JUNE JULY AUGUST SEPTEMBER OCTOBER NOVEMBER DECEMBER
GRAPHICAL REPRESENTATION OF DAILY WATER DEMAND AND PRODUCTION
AVERAGE PRODUCTION/DAY m^3 AVERAGE WATER DEMAND/DAY m^3
CONT’D
• The electricity cost was found to be the major cost in the production of water at
the Brimsu Head works. The increase in energy consumption led to increment in
the electricity cost and a subsequent increment in the production cost.
• The average production cost of the Brimsu Head works was GHS 0.31 per cubic
meter of water.
02-June-14ENERGY SURVEY OF THE BRIMSU WATER SUPPLY STATION –GHANA WATER COMPANY LIMITED (GWCL – CAPE COAST)
CONT’D
MONTH TOTAL PRODUCTION
COST PER m^3
ELECTRICITY COST/m^3 PERCENTAGE OF ELECTRICITY COST FINAL WATER
GHS GHS % m^3
JANUARY 0.27 0.11 40.7 531930
FEBRUARY 0.28 0.11 39.3 449552
MARCH 0.27 0.11 40.7 503955
APRIL 0.28 0.10 35.7 451775
MAY 0.30 0.10 33.3 407030
JUNE 0.29 0.11 37.9 627565
JULY 0.32 0.11 34.4 625640
AUGUST 0.31 0.11 35.5 630113
SEPTEMBER 0.31 0.12 38.7 595780
OCTOBER 0.36 0.20 55.6 621175
NOVEMBER 0.37 0.20 54.1 615773
DECEMBER 0.37 0.20 54.1 610075
02-June-14ENERGY SURVEY OF THE BRIMSU WATER SUPPLY STATION –GHANA WATER COMPANY LIMITED (GWCL – CAPE COAST)
RECOMMENDATION
From the results of the study it is recommended that,
• Leakages found in the treatment plant and leaks in the pumps should be
repaired in order to reduce the water loss.
• Backwashing should be carried out properly so that the rate at which the
filter media gets clogged is reduced.
02-June-14ENERGY SURVEY OF THE BRIMSU WATER SUPPLY STATION –GHANA WATER COMPANY LIMITED (GWCL – CAPE COAST)
CONT’D
• Recycling of sludge is highly recommended. The recycled water can be used for
backwashing several times, which saves water and energy as well.
• Variable Frequency Drives should be installed in the pumping system. The VFDs
control flow and/or pressure of pumps. Their ability to match flow with demand
leads to significant energy savings.
02-June-14ENERGY SURVEY OF THE BRIMSU WATER SUPPLY STATION –GHANA WATER COMPANY LIMITED (GWCL – CAPE COAST)
CONT’D
• Pump efficiency checks need to be performed regularly. This helps to determine when
maintenance works should be carried out. The greater the overall efficiency of the pump
the lower the energy consumed.
• The necessary measuring instruments needed for pump efficiency tests should be
provided. Instruments such as flow meters and pressure gauges should be installed with
each of the pumps.
02-June-14ENERGY SURVEY OF THE BRIMSU WATER SUPPLY STATION –GHANA WATER COMPANY LIMITED (GWCL – CAPE COAST)
THANK YOU
02-June-14ENERGY SURVEY OF THE BRIMSU WATER SUPPLY STATION –GHANA WATER COMPANY LIMITED (GWCL – CAPE COAST)