4.1.1 The evaluation of the benefit of any innovative technology is to be
carried out in conjunction with the hull form and propulsion system with which it is
intended to be used. Results of model tests or sea trials of the innovative technology
in conjunction with different hull forms or propulsion systems may not be
applicable.
4.2 Category (A) technology
4.2.1 Innovative energy efficiency technologies in category (A) affect
PP
and/or Vref
and their effects cannot be measured in isolation. Therefore, these effects should
not be calculated nor certified in isolation in this guidance but should be treated as a
part of vessel in EEDI Calculation Guidelines and EEDI Survey Guidelines.
4.3 Category (B) technology
4.3.1 The effects of innovative energy technologies in category (B) are
expressed as Peff
which would be multiplied by CFME
and SFCME
(in the case of PPTI(i)
>0, the average weighted value of (SFCME ∙CFME
) and (SFCAE ∙ CFAE
) ) and feff
, and then be deducted from the EEDI formula. In the case of category (B-1)
technology, feff
is 1.00.
4.3.2 Guidance on calculation and verification of effects of Category (B)
innovative technologies is given in annex 1.
4.4 Category (C) technology
4.4.1 The effects of innovative energy technologies in category (C) are
expressed as PAEeff
which would be multiplied by CFAE, SFCAE
and feff
, and then be deducted from the EEDI formula. In the case of category (C-1)
technology, feff
is 1.00.
4.4.2 Guidance on calculation and verification of effects of Category (C)
innovative technologies is given in annex 2.
4.5 Average weighted value in the case of PPTI(i)
>0
4.5.1 In the case of PPTI(i)
>0, both Category (B) and Category (C) technologies might deduct the value of
PPTI(i)
. In such case, following values are to be used for average weighted value in
calculating Σ(feff(i) ∙Peff(i) ∙CF. SFC )
in attained EEDI formula;
-
For shaft power(s):
-
( ΣPPTI(i),shaft
– ∙ΣPAEeff·ηGEN·ηPTI(i)
) / (ΣPME(i)
+ΣPPTI(i),shaft
– ∙ΣPAEeff·ηGEN·ηPTI(i)
),
where,
if (ΣPPTI(i),shaft
– ∙ΣPAEeff·ηGEN·ηPTI(i)
) is taken negative
value, the value (ΣPPTI(i),shaft
– ∙ΣPAEeff·ηGEN·ηPTI(i)
) should be fixed to
zero; and
-
For main engine(s):
-
ΣPME(i)
/ (ΣPME(i)
+ΣPPTI(i),shaft
– ∙ΣPAEeff·ηGEN·ηPTI(i)
),
where, if ΣPPTI(i),shaft
– ∙ΣPAEeff·ηGEN·ηPTI(i)
is taken negative
value, the value (ΣPPTI(i),shaft
– ∙ΣPAEeff·ηGEN·ηPTI(i)
) should be fixed to
zero.