The output from each OWC device from Saint

The
below figure shows the average height of height and periodic data at Saint
Martin island for a year. In this site, the maximum average wave height have
been measured on the month of July which is 6.965m and the corresponding wave
period is 4.485s.On other hand the minimum average wave height have been
measured on the month of February which is 6.31m and the corresponding wave
period is 3.235s.

 

 

Figure 1: Wave Height/ Wave period
data of a year for Saint Martin Island.

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Source:
“Wave energy in Bangladesh” by Samrat, Rahman et. al, ECERE2014-P005

Mean
output power for this site shown in figure below:

 

Figure 2: Mean power output from an OWC device
of a year for Saint Martin Island.

 

Source: “Wave energy in Bangladesh” by Samrat, Rahman et.
al, ECERE2014-P005

Maximum mean power output from this
site is 213.7KW/m and average mean power output from this site is 167.9872KW/m
or an economic benefit of $15.74/m, which is assumed to be per KWh of the
generator. So, annual output from each OWC device from Saint Martin’s island
for this site is (167.9872KW*8760) =1.47GWh or Bangladesh can be benefitted
more than $.138 million yearly.

Kutubdia Island:

 

Figure.3
shows that the average wave height and period data at Kutubdia island for a
year. At this site, the maximum average wave height have been measured on the
month of June and July which are 7.16m and the corresponding wave period are
4.61s and 4.75s respectively. On other hand the minimum average wave height has
been measured on the month of February which is 6.55m and the corresponding
wave period is 3.16s.

 

 

 

 

 

Figure
3: Wave Height/ Wave period data of a year for Kutubdia Island.

Source: “Wave energy in Bangladesh” by Samrat, Rahman et.
al, ECERE2014-P005

Mean output power for this site shown in figure below:           

 

 

Figure 4: Mean power output from an OWC device of a year for
Kutubdia Island.

Source: “Wave energy in Bangladesh” by Samrat, Rahman et.
al, ECERE2014-P005

 

Mean
output power for this site shown in Figure.4. Maximum mean power output from
this site is 258.42KW/m and average mean power output from this site is
198.065KW/m which is assumed to be per KWh of the generator. So annual output
from each OWC device for this site is (198.065KW*8760) =1.73GWh. It is also
supposed that an OWC converter can contribute more than $18.29/m. Annual
benefited amount will be $.163 million from just a OWC converter from Kutubdia
site only.

Sandwip Island:

 

Figure.5
shows that the average wave height and period data at Sandwip island for a
year. At this site, the maximum average wave height have been measured on the
month of June and July which are 8.4m and the corresponding wave period are
4.6s and 4.78s respectively. On other hand, the minimum average wave heights
have been measured on the month of February that is 7.58m and the corresponding
wave period is 3.55s. Mean output power for this site shown in Figure.5.
Maximum mean power output from this site is 502.565KW/m and average mean power
output from this site is 397.9367KW/m which is assumed to be per KWh of the
generator. So annual output from each OWC device for this site is
(397.9367KW*8760) =3.48GWh. An OWC converter can add more than $37.30/hour and
$.33 million/year from sandwip Island.

Figure
5: Wave Height/ Wave period data of a year for Sandwip Island.

 Source:
“Wave energy in Bangladesh” by Samrat, Rahman et. al, ECERE2014-P005

 

 

Figure
6: Mean power output from an OWC device of a year for Sandwip Island.

 

Source: “Wave energy in Bangladesh” by Samrat, Rahman et.
al, ECERE2014-P005

 

 

 

From above data
analysis, it could be clear that power output from Sandwip Island is very
higher than other two islands and average maximum power output of a year from
this site almost twice than other two sites. It does not mean that other two
sites are not feasible, both are feasible but they produced less power than
Sandwip Island. Because any site in the world within an average wave power
level of over 15KW/m has the potential to generate wave energy at competitive
prices (without hind cast estimation technique analysis).

Table:
Estimated Production of an OWC in Bangladesh

 

Location

Hourly
Production
(KW/h)

Annual
Production
(GW/year)

Hourly Average
Production
(KW/h)

Average Annual
Production
(GW/Year)

 
Saint Martin’s

 
167.9872

 
1.47

 
 
254.65

 
 
2.23

 
Kutubdia

 
198.065

 
1.73

 
Sandwip

 
397.9367

 
3.48

 

Source:
Authoress herself

 

The above table
shows the annual and hourly electricity production from an OWC on three
different locations. Among them the OWC from Sandwip Island can produce the
highest amount of electricity than Kutubdia or Saint Martin’s Island, which is
397.9367 KW/h or 3.48 GW/year. The table also shows that average production of
electricity from these locations is 254.65KW/h or 2.23GW/ year.