Common use of Guaranteed Heat Rate Clause in Contracts

Guaranteed Heat Rate. (i) Seller shall guarantee each Unit’s Heat Rate over the following range of dispatchable operational levels at the mean Site elevation at standard ISO Conditions (59º F, 60% relative humidity) and Peak July Conditions: at Peak Load; at 100% of Base Load on the combustion turbine(s); at 75% of Base Load on the combustion turbine(s); at 50% of Base Load on the combustion turbine(s); and if applicable at minimum load on the combustion turbine(s), if less than 50%. [Note: The concept of Single Unit Operation and Dual Unit Operation, and the curve shape below that takes into consideration duct-fire operations as well as operations without duct firing, is particular to combined cycle technology. Modifications will be made for other technologies.] For purposes of scheduling the output of the plant, Seller shall provide the Guaranteed Heat Rate Curve from minimum load to Peak Load based on the Guaranteed Heat Rate Points found in Appendix II and the best fit mathematical curve fit equations for each curve or curve segment, at the ISO Conditions for Single Unit Operation and Dual Unit Operation and shall provide no later than 12 months prior to the Initial Delivery Date (i) the correction curves to correct for changes in ambient dry bulb temperature from the ISO Condition, (ii) the correction curves to correct for ambient relative humidity from the ISO Condition, and (iii) the correction curves to correct for ambient barometric pressure from the Site ISO Condition (collectively with the Guaranteed Heat Rate Curve, the “Guaranteed Heat Rate Curves”), which will be deemed incorporated into Appendix II when provided. The Guaranteed Heat Rate Curves shall consist of two curve segments, (a) the Unfired Guaranteed Heat Rate curves for operations between minimum load and Base Load, and (b) the Duct-Fired Guaranteed Heat Rate curves from Base Load to Peak Load. The curve fit equations will be used for determination of all Guaranteed Heat Rates, with graphical format provided for information purposes only. (ii) The Unfired Guaranteed Heat Rates curves for Single Unit Operation and Dual Unit Operation without duct firing shall be a subset of the Guaranteed Heat Rate Curves and calculated using the mathematical curve fit equations for each level of Unit output as a function of the ratio of Unit output to Unit Capacity. The equations will be applicable for ratios based on both Initial Base Capacity as defined in 4.2(b)(i) and Tested Base Capacity as defined in 4.2(b)(ii). (iii) The Duct Fired Guaranteed Heat Rates curves of the Unit for Single Unit Operation and Dual Unit Operation at various MW levels of duct firing shall be a subset of the Guaranteed Heat Rate Curves and calculated by using a simple linear interpolation between the Guaranteed Heat Rate Point at the at the full Base Load of the Unit (without duct firing) and the Guaranteed Heat Rate Point at the guaranteed Peak Load (with duct firing)..

Guaranteed Heat Rate. (i) Seller shall guarantee each Unit’s Heat Rate over the following range of dispatchable operational levels at the mean Site elevation at standard ISO Conditions (59º F, 60% relative humidity) and Peak July Conditions: at Peak LoadLoad [if applicable]; at 100% of Base Load on the combustion turbine(s); at 75% of Base Load on the combustion turbine(s); at 50% of Base Load on the combustion turbine(s); and if applicable at minimum load Minimum Load on the combustion turbine(s), if less than 50%. [Note: The concept of Single Unit Operation and Dual Unit Operation, and the curve shape below that takes into consideration duct-fire operations as well as operations without duct firing, is particular to combined cycle technology. Modifications will be made for other technologies.] For purposes of scheduling the output of the plantUnit(s), Seller shall provide [for each Unit] the Guaranteed Heat Rate Curve from minimum load Minimum Load to 100% of Base Load [If Facility is a combined cycle technology, substitute “100% of Base Load” with “Peak Load Load”] based on the Guaranteed Heat Rate Points found in Appendix II and the best fit mathematical curve fit equations for each curve or curve segment, at the ISO Conditions [for Single Unit Operation and Dual Unit Operation Operation] and shall provide no later than 12 twelve (12) months prior to the Initial Delivery Date (i) the correction curves to correct for changes in ambient dry bulb temperature from the ISO ConditionConditions, (ii) the correction curves to correct for changes in ambient relative humidity from the ISO ConditionConditions, and (iii) the correction curves to correct for changes in ambient barometric pressure from the Site ISO Condition Conditions (collectively with the Guaranteed Heat Rate CurveCurve tables set forth in Appendix II, the “Guaranteed Heat Rate Curves”), which will be deemed incorporated into Appendix II when provided. The Guaranteed Heat Rate Curves shall consist of two [two] curve segmentssegments [if duct firing available], (a) the Unfired Guaranteed Heat Rate curves for operations between minimum load Minimum Load and Base Load, and (b) [if applicable] the Duct-Fired Guaranteed Heat Rate curves from Base Load to Peak Load. The curve fit equations will be used for determination of all Guaranteed Heat Rates, with graphical format provided for information purposes only. (ii) . The Unfired Guaranteed Heat Rates curves for Single Unit Operation [and Dual Unit Operation without duct firing firing] shall be a subset of the Guaranteed Heat Rate Curves and calculated using the mathematical curve fit equations for each level of Unit output as a function of the ratio of Unit output to Unit Capacity. The equations will be applicable for ratios based on both Initial Base Capacity as defined in 4.2(b)(i) and Tested Base Capacity as defined in 4.2(b)(ii). (iiiii) [if applicable] The Duct Fired Guaranteed Heat Rates curves of the Unit for Single Unit Operation and Dual Unit Operation at various MW levels of duct firing shall be a subset of the Guaranteed Heat Rate Curves and calculated by using a simple linear interpolation between the Guaranteed Heat Rate Point at the at the full Base Load of the Unit (without duct firing) and the Guaranteed Heat Rate Point at the guaranteed Peak Load (with duct firing)..) as specified in Appendix II.