Standard Technical Features of BTG System for Supercritical 660 ...

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Standard Technical Features of BTG System for Supercritical 660/800 MW Thermal Units5.1 General RequirementsCHAPTER 5PERFORMANCE GUARANTEES5.1.1 The equipment shall meet the ratings and performance requirements stipulatedfor various equipment. The guaranteed performance parameters shall bewithout any tolerance values and all margins required for instrumentinaccuracies and other uncertainties shall be deemed to have been included inthe guaranteed figures.5.1.2 All the guarantees shall be demonstrated during functional guarantee/acceptance test. The various tests which are to be carried out duringperformance guarantee/acceptance test are listed in this chapter. The guaranteetests shall be conducted at site on each unit individually.5.1.3 All instruments required for performance testing shall be of the type andaccuracy required by the code(s) and prior to the test these shall be calibratedin an independent test Institute. The protecting tubes, pressure connections andother test connections required for conducting guarantee test shall conform tothe relevant codes.5.1.4 Detailed Performance Test Procedure to be furnished shall contain thefollowing:i) Object of the test.ii) Various guaranteed parameters & tests as per contract.iii) Method of conductance of test and test code.iv) Duration of test, frequency of readings & number of test runs.v) Method of performance calculation.vi) Correction curves.vii) Instrument list consisting of range, accuracy, least count, and location ofinstruments.viii) Scheme showing measurement points.ix) Sample calculation.x) Acceptance criteria.xi) Any other information required for conducting the test.5.1.5 In case during performance guarantee test(s) it is found that theequipment/system has failed to meet the guarantees, all necessarymodifications and/or replacements shall be carried out to make theequipment/system comply with the guaranteed requirements & the same shallbe demonstrated by conducting another performance guarantee test at no extracost to the purchaser. However, if the contractor is not able to demonstrate the12
Standard Technical Features of BTG System for Supercritical 660/800 MW Thermal Unitsguarantees, even after the above modifications/ replacements within ninety(90) days or a reasonable period allowed by the purchaser, after the tests havebeen completed, the purchaser will have the right to either of the following:i) For Category-I GuaranteesReject the equipment/ system/ plant and recover the payment alreadymadeORAccept the equipment/ system/ plant after levying Liquidated Damagesas stipulated. (Amount of LD to be specified by the purchaser based onunit size, coal cost etc.)ii)For Category-II GuaranteesReject the equipment/ system/ plant and recover the payment alreadymade. Conformance to the performance requirements under Category-IIis mandatory.iii)For Category-III GuaranteesReject the equipment/ system/ plant and recover the payment alreadymade.ORAccept the equipment/ system after assessing the deficiency in respect ofthe various ratings, performance parameters and capabilities and recoveramount equivalent to the damages.5.2 Guarantees Under Category-IThe performance guarantees which attract liquidated damages are as follows:5.2.1 Efficiency of the steam generator at 100% TMCR with zero make up whilefiring the design coal at rated steam parameters, rated coal fineness and ratedexcess air.5.2.2 Efficiency of the steam generator at 80% TMCR with zero make up whilefiring the design coal at rated steam parameters, rated coal fineness and ratedexcess air (for reference).5.2.3 Steam generating capacity in T/hr. of steam at rated steam parameters atsuperheater outlet and rated steam temperature at reheater outlet (with anycombination of mills working as per purchaser’s discretion) with the coalbeing fired from within the range specified.5.2.4 Turbine Cycle Heat Rate in kcal/kWh under rated steam conditions, designcondenser pressure with zero make up at 100% TMCR load.13
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