Guaranteed Heat Rate Clause Samples
The Guaranteed Heat Rate clause sets a specific efficiency standard for a power generation facility, defining the maximum amount of fuel energy required to produce a unit of electrical output. In practice, this clause requires the facility operator to maintain equipment and operations so that the plant consistently meets or exceeds this efficiency threshold, often measured in BTU/kWh or similar units. By establishing a clear performance benchmark, the clause ensures predictable fuel costs and energy output, protecting the interests of both the facility owner and the purchaser by minimizing inefficiency and associated financial risks.
Guaranteed Heat Rate. Seller shall operate and maintain the Facility so as to achieve the Guaranteed Heat Rate in accordance with the provisions of Exhibit R.
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).
(ii...
Guaranteed Heat Rate. The Guaranteed Heat Rate of the Project at Contract Capacity is [__________] Btu per kWh (HHV) at the Contract Conditions, when tested in accordance with the procedures set forth in Appendix 7. The results of the most recent test shall determine the Heat Rate until the next test is performed in accordance herewith. The “Heat Rate Percentage” for the Project shall be the Heat Rate of the Project divided by the Guaranteed Heat Rate, expressed as a percentage. The Heat Rate Percentage will remain in effect until another Heat Rate for the Project is established through a Heat Rate test described above. If the Heat Rate Percentage of the Project during a month of the Delivery Period is lower than 98% or higher than102%, the Monthly Capacity Payment payable in respect of such month shall be adjusted as set forth in Appendix 9.2 by the resultant Heat Rate Payment for such month, which shall be calculated as follows: HRP = (GHR ‑ THR) x DE x ICF Where: HRP is the Heat Rate Payment for such month in respect of the Project. GHR is the Guaranteed Heat Rate of the Project. THR is Test Heat Rate during such month for the Project at the Contract Capacity determined in accordance with Appendix 7. DE is Delivered Energy during such month. ICF is Indexed Cost of Fuel per Btu during such month which shall be (a) if GHR is greater than THR, the Gas Index, or (b) if THR is greater than GHR, the sum of the Gas Index and the Transport Cost. A positive value for the Heat Rate Payment represents a payment to be made from Buyer to Seller, and a negative value represents a payment to be made from Seller to Buyer. If, for any reason, the Gas Index ceases to be published, or either Party reasonably believes that the Gas Index is substantially changed so that it does not adequately reflect the aggregate market price of gas at various receipt points on the Buyer system, then either Party may provide the other with Notice to such effect and the Parties shall negotiate in good faith to determine an alternative method or methods for determining the Gas Index in order to maintain the balance of economic benefits and burdens that the Parties agreed to with respect to the Gas Index as of the “Effective Date”. Any substitute index or indices must be recognized in the industry as a measure of aggregate daily prices for gas delivered to the various receipt points on the Buyer system. If the Parties are unable to agree on a successor market, index or methodology within thirty (30) days of the da...
Guaranteed Heat Rate. “GHR”)
1. The Guaranteed Heat Rate (“GHR”) for the Unit is 13,500 Btu/kWh (HHV) (higher heating value or “HHV”).
2. Each month Seller will perform a comparison of the Actual Heat Rate (“AHR”) for the Unit against the GHR, as follows:
(a) For every month, Seller will measure the Actual Heat Rate (“AHR”) for the Unit for all hours in which the following three conditions are satisfied (“AHR Hours”): (i) a Physical Energy Schedule from the Unit was scheduled by Buyer, (ii) Seller delivered the full Final Physical Energy Schedule for the Unit to Buyer and (iii) the Unit operated at steady-state and at full load (including minor variations in output due to changes in ambient conditions, but not including ramping up or down or planned or unplanned discontinuation of operations). Such monthly AHR will be measured in Btu/kWh (HHV) using the sum of the Designated Hourly Fuel Consumption for each AHR Hour of the month divided by the sum of the Final Physical Energy Schedules for each such hour of the month. The “Designated Hourly Fuel Consumption” for the Unit in any hour is the product of (i) the sum of any Final Physical Energy Schedule for that hour plus any energy generated in response to a Buyer dispatch instruction, divided by Unadjusted Metered Energy for that hour, multiplied by (ii) actual fuel consumption of the Unit for such hour as measured by the Gas Metering Equipment. The GHR for the Delivery Month and the AHR for the Delivery Month will be used to determine the Billing Heat Rate for the monthly Energy Price in that Delivery Month as set forth in Section H above.
3. The Operations Committee shall evaluate, and may recommend to the Parties, procedures to provide additional incentives to Seller to maintain low actual heat rate for the Unit.
Guaranteed Heat Rate. The Guaranteed Heat Rate for each Dedicated Unit during each hour of the Month shall be determined according to this Appendix H based upon the energy requested pursuant to a Dispatch order and not the actual output of such Dedicated Unit.
(a) The Guaranteed Heat Rate for each Dedicated Unit during any hour when the energy Dispatched from such Dedicated Unit is less than or equal to the Standard Capacity of such Dedicated Unit during the hour shall be taken from Table 1. The Guaranteed Heat Rate shall be read from Column B based on the energy Dispatched from such Dedicated Unit during the hour divided by the Standard Capacity of such Dedicated Unit during the hour. Table 1 - Guaranteed Heat Rate Column A Column B Energy Dispatched as a Percent of Standard Guaranteed Heat Capacity Rate (BTU/KWh HHV) -------------------------------------------------------------------------------- 70% 7770 71% 7740 72% 7700 73% 7670 74% 7630 75% 7600 76% 7560 77% 7530 78% 7490 79% 7460 80% 7420 81% 7400 -------------------------------------------------------------------------------- Appendix H to PPA Table 1 - Guaranteed Heat Rate Column A Column B Energy Dispatched as a Percent of Standard Guaranteed Heat Capacity Rate (BTU/KWh HHV) -------------------------------------------------------------------------------- 82% 7380 83% 7360 84% 7340 85% 7320 86% 7290 87% 7270 88% 7250 89% 7230 90% 7210 91% 7190 92% 7170 93% 7150 94% 7130 95% 7110 96% 7080 97% 7060 98% 7040 99% 7020 100% 7000 --------------------------------------------------------------------------------
(b) The Guaranteed Heat Rate for each Dedicated Unit during any hour when the energy Dispatched from such Dedicated Unit is greater than the Standard Capacity of such Dedicated Unit shall be determined from the following formula: Guaranteed Heat Rate = (EFL*7,000 BTU/KWh + EAFL*9,500 BTU/KWh) / (EFL + EAFL) Appendix H to PPA where: EFL is the amount of energy in KWh Dispatched up to the Standard Capacity of a Dedicated Unit during the hour; and EAFL is the amount of energy in KWh Dispatched above the Standard Capacity of the Dedicated Unit during the hour. Appendix H to PPA
Guaranteed Heat Rate. The fuel consumed for each Dedicated Unit shall be measured against the Guaranteed Heat Rate pursuant to Appendix H.