इंटरनेट
मानक
Disclosure to Promote the Right To Information
Whereas the Parliament of India has set out to provide a practical regime of right to
information for citizens to secure access to information under the control of public authorities,
in order to promote transparency and accountability in the working of every public authority,
and whereas the attached publication of the Bureau of Indian Standards is of particular interest
to the public, particularly disadvantaged communities and those engaged in the pursuit of
education and knowledge, the attached public safety standard is made available to promote the
timely dissemination of this information in an accurate manner to the public.
“जान1 का अ+धकार, जी1 का अ+धकार”
“प0रा1 को छोड न' 5 तरफ”
“The Right to Information, The Right to Live”
“Step Out From the Old to the New”
Mazdoor Kisan Shakti Sangathan
Jawaharlal Nehru
IS 15666-2 (2006): Gas turbines - Procurements, Part 2:
Standard reference conditions and ratings [ETD 15: Rotating
Machinery]
“!ान $ एक न' भारत का +नम-ण”
Satyanarayan Gangaram Pitroda
“Invent a New India Using Knowledge”
“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता ह”
है”
ह
Bhartṛhari—Nītiśatakam
“Knowledge is such a treasure which cannot be stolen”
IS 15666 (Part 2): 2006
1S0 3977-2:1997
Wi’7fhJ7m
Indian Standard
GAS TURBINES
PART 2 STANDARD
— PROCUREMENT
REFERENCE
CONDITIONS
AND RATINGS
ICS 27.040
0
BUREAU
MANAK
OF
BHAVAN,
INDIAN
9
NEW
April 2006
BIS 2006
STANDARDS
BAHADUR
DELHI
SHAH
ZAFAR
MARG
110002
Price
Group
2
Rotating
Machinery
NATIONAL
Sectional
Committee,
ET 15
FOREWORD
This Indian Standard
(Part 2) which is identical
with ISO 3977-2
: 1997 ‘Gas turbines
—
Procurement — Part 2 :-Standard reference conditions and ratings’ issued by the International Organization
for Standardization
(1S0) was adopted by the Bureau of Indian Standards on the recommendation
of
the Rotating Machinery Sectional Committee and approval of the Electrotechnical
Division Council.
The text of the ISO Standard has been approved as suitable for publication as an Indian Standard
without deviations.
Certain conventions are, however, not identical to those used in Indian Standards.
Attention is particularly drawn to the following:
a)
Wherever the words ‘International
read as ‘Indian Standard’,
Standard’
appear
referring
to this standard,
b)
Comma ( , ) has been used as a decimal marker while in Indian Standards,
is to use a point ( . ) as the decimal marker.
they should be
the current
practice
In this adopted standard, reference appears to the following International
Standard for which Indian
Standard also exists. The corresponding
Indian Standard which is to be substituted in its place is listed
below along with its degree of equivalence for the edition indicated:
International
ISO 2314:
Acceptance
Standard
1989 Gas turbines
tests
Corresponding
—
Degree of Equivalence
Indian Standard
IS 15664:2006
Gas turbines
Acceptance
tests
—
Identical
For the purpose of deciding whether a particular requirement of this standard is complied with, the
final value, observed or calculated expressing the result of a test or analysis, shall be rounded off in
accordance with IS 2:1960 ‘Rules for rounding off numerical values (revised)’. The numberof significant
places retained in the rounded off value should be the same as that of the specified value in this
standard.
*
IS 15666 (Part 2) :2006
ISO 3977-2:1997
Mian
GAS TURBINES
PART 2 STANDARD
1
Standard
— PROCUREMENT
REFERENCE
CONDITIONS
AND RATINGS
Scope
This part of ISO 3977 specifies the standard reference conditions and ISO standard ratings for gas turbhes.
2 Normative
reference
The following standard contains provisions which, through reference in this text, constitute provisions of this part of
ISO 3977. At the time of publication, the edition indicated was valid. All standards are subject to revision, and
parties to agreements based on this part of ISO 3977 are encouraged to investigate the possibility of applying the
most recent edition of the standard indicated below. Members of IEC and 1S0 maintain registers of currently valid
International Standards.
ISO 2314:1989, Gas twbines — Acceptance
tests.
.,, ,
3 Standard reference conditions
The standard reference conditions on which ISO power, efficiency,
based -are -as specified in 3.1 to 3.4.
3.1
–
a total pressure of 101,3 kPa;
–
a total temperature
(alternatively,
the
compressor
intake
flare),
-as described
in
of 15 “C;
a relative humidity of 60
Yo.
Exhaust conditions
For the exhaust at the turbine
pressure shall be 101,3 kPa.
3.3
are
Air intake conditions
For the intake air at the compressor
flange
ISO 2314:1989,6.6.2,
the conditions shall be
3.2
heat rate and specific fuel consumption
exhaust
flange (or regenerator
outlet, if a regenerative
Cooling water conditions (if applicable)
The inlet water temperature
shall be 15 “C if cooling of the working fluid is used.
cycle is used), the static
2) :2006
ISO 3977-2:1997
IS 15666
(Part
3.4 Working fluid heater or cooler
Where a heater or a cooler is used that uses ambient air, the standard reference conditions
be 15 “C and 1-01,3 kPa.
of the ambient air shall
.
4 Ratings
4.1
General
4.1.1 The output power of a given gas turbine at a given reference turbine inlet temperature is, in generaI,
proportional to the absolute ambient pressure and is also greatly dependent on the air intake temperature (normally
outside dry bulb temperature). Likewise, the output at a given air intake temperature is dependent on the reference
turbhe inlet temperature. To achieve a rating, it is necessary to adopt standard conditions of ambient temperature
and pressure, but gas turbine ratings will nevertheless vary considerably owing to the differing operational modes
demanded of them as well as the varying criteria used in the design of the basic elements. ISO standard ratings
neglect pressure drop at the inlet and exhaust but site ratings allow for these losses.
NOTE —
Steam or water injection maybe used to increase the power output and to reduce the NO, emissions.
4.1.2 The performance
follows:
ratings of gas turbines shall be assessed
a)
turbhes
intended for use on liquid fuel: 42000
b)
turbines intended for use on gaseous fuei (100%
The specific energy at constant pressure
101 ,3%Pa and a temperature of 15 “C.
on the net specific energy of the fuel used, as
kJ/kg;
methane): 50000
of the fuel, whether
kJ/kg.
liquid, gaseous or solid, is based on a pressure
of
,,, ,
4.1.3 If the fuel to be used for testing the gas tutilne is different from that agreed between the purchaser and the
manufacturer for service operation, a test fuel of a mutually agreed specification shall be used.
NOTE —
Futther information will be given in ISO 3977-9, now in course of preparation.
4.2 Operational modes
Unless specially agreed upon between the purchaser and the manufacturer, -the net power rating of a gas turbine
shall be -specified under a combination of one of the-classes specified in 4.2.1 together with one of the ranges of
average number of starts per annum specified in 4.2.2.
EXAMPLE
B-ll (Class B, Range 11)refers to operation of up to 2000 h per annum associated with any number of starts up to 500 per
annum.
The manufacturer shall state the type, frequency
relevant operational mode.
NOTE —
4.2.1
and degree of inspection
and/or maintenance
Further information will be given in ISO 3977-9, now in course of preparation.
Classes
Class A: operation up to and including 500 h per annum at resewe peak power rating;
Class B: operation up to and including 2000 h per annum at peak power rating
Class C: operation up to and including 6000
h per annum at semi-base power rating;
Class D: operation up to and including 8760
h per annum at base power rating.
2
required
for the
IS 15666 (Part 2): 2006
ISO 3977-2:1997
NOTE — It should be recognized that some gas tutbine applicationswill operate with a combinationof the classes given in
4.2.1. In such cases, the purchaser should specify the anticipated number of annual hours of operation at the specified net
power ratings in each class. Operation outside these specified net power ratingdoperational modes could materially affect the
inspectionintervalsand maintenance required.
4.2.2
Ranges
Range 1: over 500 starts per annum average;
Range II: up to 500 stark per annum average;
Range 111:up to 100 starts per annum average;
Range IV: up to 25 starts per annum average;
Range V: continuous
period.
operation
without
planned
shutdown
for inspection
and/or maintenance
within a specified
4.3 ISO standard ratings
The manufacturer shall declare standard ratings, based on electrical power at the generator terminals or on turbine
output shaft power under the standard reference conditions defined in clause 3, associated with the following
operational modes:
a)
ISO standard peak load rating (2 000 h and 500 stats
b)
ISO standard base load rating (8 760 h and 25 starts per annum average) Class D: Range IV.
In each case, the manufacturer
required.
4.4
per annum average) Class B: Range 11;
shall state the type, frequency
and degree
of inspection
and/or
maintenance
,!
Site ratings
The site power rating shall be specified by the manufacturer
as follows.
a)
Generating plant: the net electrical
given in ISO 2314:1989,8.1.2.
power at the generator
terminals,
with adjustment
for auxiliary
power as
b)
Mechanical drives: the net shaft power, adjusted for any auxiliaries not driven directly by the turbine (as defined
in 1S0-2314:1989, 8.1.1).
In either case, the site power rating shall relate to specified site conditions of the installation (such as ambient
pressure and temperature, and pressure losses, steam and water injection, etc.) and operating modes under which
the plant is intended to run in service.
When the gas generator is supplied separately, its site power shall be expressed as the gas-power arising from the
isentropic expansion of the gas generator exhaust flow (using total pressure and temperature) to the ambient
atmospheric pressure when it is operated under the specified site conditions of the installation and operating modes
under which the plant is intended to run in service (see ISO 2314:1989, 6.3.5).
3
Bureau of Indian Standards
51S is a statutory institution established under the Bureau oflndian Sfarrdards Act, 1986 to promote
harmonious
development
of the activities of standardization,
marking and quality certification
of
goods and attending to connected matters in the country.
Copyright
EllS has the copyright of all its publications. No part of these
form without the prior permission in writing of BIS, This does
of implementing
the standard, -of necessary details, such
designations.
Enquiries reiating to copyright be addressed
Review
publications maybe reproduced in any
not preclude the free use, in the course
as symbols and sizes, type or grade
to the Director (Publications),
BIS.
of Indian Standards
Amendments are issued to standards as the need arises on the basis of comments. Standards are
aiso reviewed periodically; a standard aiong with amendments is reaffirmed when such review
indicates that no changes are needed; if the review indicates that changes, are needed, it is taken
up for revision. Users of Indian Standards should ascertain that they are in possession of the iatest
amendments or edition by referring to the latest issue of ‘BIS Catalogue’ and ‘Standards:
Monthly
Additions’.
This indian Standard
has been deveioped
Amendments
Amend
No.
from Doc : ET 15 (5691).
Issued
Since
Publication
Text Affected
Date of Issue
BUREAU
OF INDIAN
STANDARDS
Headquarters:
Manak.Bhavan,
9 Bahadur Shah Zafar Marg, New Deihi 110002
Telephones :23230131,
23233375,
23239402
Website: www. bis.org. in
Regional
Offices
:
Telephones
Central
: Manak Bhavan, 9 Bahadur
NEW DELHI 110002
Eastern
: 1/14 C. i. T. Scheme
KOLKATA 700054
Northern
: SCO 335-336,
Southern
: C. i. T. Campus,
Western
: Manakalaya,
E9 MlDC, Marol, Arrdheri
MUMBAI 400093
Branches:
Shah Zafar Marg
23237617
[ 23233841
VI! M, V. i. P. Road, Kankurgachi
Sector 34-A, CHANDiGARH
IV Cross Road, CHENNAI
23378499,23378561
{ 23378626,23379120
2603843
{ 2609285
160022
6001-13
(East)
2254
[ 2254
1216, 2254
2519,2254
1442
2315
28329295,28327858
“[ 28327891,28327892
AHMEDABAD.
BANGALORE.
BHOPAL.
BHUBANESHWAR.
COIMBATORE.
FARIDABAD.
GtiAZiABAD.
GUWAHATI.
HYDERABAD.
JAiPUR.
KANPUR.
LUCKNOW.
NAGPUR.
PARWANOO.
PATNA.
RAJKOT.
PUNE.
THiRUVANANTHAPURAM.
ViSAKHAPATNAM.
Printed
at New India
Printing
Press,
Khurja,
India