Topic:"Generation Grid Resources" in M03097

Why do this project? The IRP Action Plan includes the following: "NSPI will apply to the UARB for the approval of capital investments to optimize the capacity and environmental performance of existing generation assets." The Tufts Cove 6 W...

AI summary The IRP Action Plan includes a Waste Heat Recovery project at Tufts Cove, which aims to provide customer savings, improve environmental performance, enhance power system stability, and add generation at the Province's load centre.

Nova Scotia Environment Project: Combined Cycle Heat Recovery Stea'm Turbine{Construction) Tufts Cove Generating Station (Unit #6) Site: 31'5 Windmill Road, Dartmouth PIO:

AI summary The document outlines a project for the construction of a Combined Cycle Heat Recovery Steam Turbine at the Tufts Cove Generating Station (Unit #6) located on 31'5 Windmill Road, Dartmouth, with the PIO listed as the responsible party.

Description of Works or Undertakings The overall project proposed by Nova Scotia Power Incorporated (NSP1) includes the consttuction of the Tufts Cove 6 Generating Station, including the infilling of approximately 2727square metres (m 2 )...

AI summary Nova Scotia Power Incorporated proposes the construction of the Tufts Cove 6 Generating Station, which involves infilling marine fish habitat in Halifax Harbour and dredging to install new cooling water structures within existing water lot boundaries.

6.1.10 Vehicle Loads Design loads for standard vehicles shall be CS-600 Loading in accordance with CSA CAN3-S6-M. Wheel loads for non-standard vehicles such as forklifts, haul trucks, dozers, wheel loaders, pallet lifters, etc. shall be as...

AI summary This section outlines the design loads for standard and non-standard vehicles. Standard vehicles follow the CS-600 Loading standard from CSA CAN3-S6-M, while non-standard vehicles rely on manufacturer-provided data for wheel loads.

6.1.11 Piperack/ Utility Rack Loads

AI summary This section discusses the topic of Piperack/Utility Rack Loads, focusing on standards and regulations related to structural steel and building codes.

NOVA SCOTIA POWER INC. TUFTS COVE GENERATING STATION TUFTS COVE 6 WASTE HEAT RECOVERY PROJECT

AI summary The document introduces the Tufts Cove 6 Waste Heat Recovery Project by Nova Scotia Power Inc., focusing on the development and implementation of a waste heat recovery system at the Tufts Cove Generating Station.

ADDENDUM - HEAT BALANCES FOR UNFIRED PLANT DESIGN PART-LOAD OPERATION CONSIDERATIONS

AI summary This addendum addresses heat balance considerations for unfired plant design during part-load operation. It provides technical insights into the thermal performance of plants operating below full capacity, which is critical for efficient and safe design and operation.

1.0 INTRODUCTION Nova Scotia Power Inc. (NSPI) currently have installed two LM6000 PC E-Sprint gas turbine generators (GTG) at Tufts Cove, Nova Scotia. The GTG units are currently operated in peaking duty in simple-cycle mode and are desig...

AI summary Nova Scotia Power Inc. (NSPI) is evaluating an upgrade to its Tufts Cove gas turbine facility to a combined-cycle configuration. This includes installing new heat recovery steam generators and a condensing steam turbine. An addendum to a previous report provides performance summaries and heat balance diagrams for the plant under varying load conditions.

2.0 BASIS OF PERFORMANCE Please refer to Section 2.0 of Heat Balance Report 1552RP01 Heat Balances – Unfired Plant Design for a more complete description of the basis of the combined-cycle power plant design and performance. The part-load...

AI summary The document describes the basis of performance for a combined-cycle power plant, including ambient conditions, gas turbine performance data from GE APPS, and steam system control assumptions under different operational scenarios. It also outlines cooling water flow adjustments and auxiliary power consumption estimates.

NOVA SCOTIA POWER INC. Project: 1552 TUFTS COVE 6 WASTE HEAT RECOVERY PROJECT Date: 5-Mar-08 TABLE 1 HEAT BALANCE SUMMARY - 1 GT AT PART LOAD Issue: 01 GT Load 100% 90% 80% 77% 76% Ambient Dry Bulb Temp. °F 45 45 45 45 45 Ambient Relative...

AI summary The document presents a heat balance summary for the Tufts Cove 6 Waste Heat Recovery Project at various gas turbine (GT) load levels. It includes data on electrical output, fuel consumption, steam parameters, and cooling water flow to evaluate the project's efficiency and performance at different operational conditions.

NOVA SCOTIA POWER INC. TUFTS COVE 6 WASTE HEAT RECOVERY PROJECT TABLE 1 HEAT BALANCE SUMMARY - 1 GT AT PART LO GT Load 70% 60% 50% 40% 30% Ambient Dry Bulb Temp. Ambient Relative Humidity °F % 45 77 45 77 45 77 45 77 45 77 Inlet Air Temper...

AI summary The document presents a heat balance summary for the Tufts Cove 6 Waste Heat Recovery Project at 70%, 60%, 50%, 40%, and 30% GT load. It details electrical outputs, fuel consumption, heat rates, and various operational parameters such as steam temperatures, pressures, and cooling water temperatures.

3.2 Part Load Performance Data and Heat Balances with Two Gas Turbines Operating A performance summary with two gas turbines in operation at loads between 30% and 100% is provided in Table 2 hereafter. A curve showing Net Plant Heat Rate v...

AI summary This section discusses part load performance data and heat balances for a system with two gas turbines operating between 30% and 100% load. It references Table 2, Figure 2, and Appendix C for detailed information on net plant heat rate, output, and annual average ambient conditions.

NOVA SCOTIA POWER INC. TUFTS COVE 6 WASTE HEAT RECOVERY PROJECT TABLE 2 HEAT BALANCE SUMMARY - 2 GTS AT PART LO GT Load 70% 60% 50% 40% 30% Ambient Dry Bulb Temp. °F 45 45 45 45 45 Ambient Relative Humidity % 77 77 77 77 77 Inlet Air Tempe...

AI summary This document presents a heat balance summary for the Tufts Cove 6 Waste Heat Recovery Project, detailing electrical output, fuel consumption, and various operational parameters for different GT load levels (70% to 30%). It includes information on gas turbine outputs, steam turbine performance, and cooling water temperatures.

4.1 Ramping from Part-Load to Full-Load – Unfired Question: NSPI would like to know how fast the plant could go from 30 MW (i.e. 2 LM600 gas turbines at minimum load) to full output under average annual temperatures and at what rate NSPI c...

AI summary NSPI is inquiring about the ramping capability of a plant from 30 MW to full output under average annual temperatures and the rate at which load can be varied to follow wind turbine generated power variations in the NSPI system.

Reply: - a) To the best of our knowledge, any LM6000 can easily increase load at a rate of approximately 10 MW per minute. We assume that NSPI's LM6000's can also. - b) In general, as the LM6000 increases in load/output, it's exhaust tempe...

AI summary The response discusses the operational capabilities of the LM6000 gas turbine and its interaction with the steam turbine generator (STG) and heat recovery steam generator (HRSG) in a power plant. It outlines how the STG can adjust to changes in load and temperature, provided the system is properly designed.

4.2 Duct-Firing Ramping Question: NSPI are still exploring with the regulator, the installation and ability to use duct-firing as originally proposed. The approach we would like to use is to justify ductfiring on increased ability to regul...

AI summary Nova Scotia Power Inc. (NSPI) is exploring the feasibility of duct-firing at a combined-cycle power plant to enhance load regulation for wind integration. They are seeking clarification on whether duct-firing improves or complicates ramping capabilities and whether it provides a broader operational range under varying steam conditions.

Reply: - a) Duct-firing (once at the GTG's are at base load, SPRINT on or off as applicable, and the OTSGs and STG are stable) would add further capacity flexibility (at the STG). Again, with properly designed systems, the only big impedim...

AI summary The response discusses the potential benefits and control considerations of duct-firing in a power generation context, noting that it can add capacity flexibility and provide a greater range of operation, with adjustments made to accommodate steam conditions and ramp rates.

4.3 EPC Specification Considerations Whatever approach NSPI decides upon, the EPC Specification should very clearly identify the design criteria and intent for the combined-cycle power plant. Most EPC contractors will simply assume/design-...

AI summary The EPC Specification for the combined-cycle power plant must clearly outline design criteria and intent, as EPC contractors typically assume base-load operation unless specific part-load and operational criteria are explicitly stated.

Performance By: JMCLEISH Project Info: Engine: LM6000 PC-SPRINT w/ FIGV at 0 Degrees Temperature, °F 75.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0 SPRINT LPC LPC LPC LPC OFF OFF OFF OFF OFF OFF OFF OFF lb/hr 8308 8308 8308 83...

AI summary The document provides performance data for an LM6000 PC-SPRINT engine with FIGV at 0 degrees, including temperature, speed, pressure, and exhaust parameters across various operational conditions.

HEAT BALANCES ONE GAS TURBINE OPERATING AT PART LOAD

AI summary The document presents heat balance calculations for a gas turbine operating at part load, supported by a series of figures. The content is technical and focuses on engineering analysis of turbine performance.

Tufts Cove 6 Project Determine Minimum STG Load at Minimum Condenser Vacuum HP Steam Temperature 690 °F Winter Summer Case 5 Case 6 Amb Temp F 24 66 Compressor Inlet Temp F 40 66 CW Temp F 34 63 STG Output kW 13,250 12,840 Condenser Vaccuu...

AI summary The document presents technical data comparing different operational scenarios for the Tufts Cove 6 Project, focusing on steam turbine generator (STG) performance under varying condenser vacuum and steam temperatures. It includes detailed tables outlining parameters such as ambient temperature, compressor inlet temperature, cooling water temperature, STG output, and steam inlet conditions for winter and summer cases.

3. Incorporation of Design or Equipment Specifications to Ensure Plant Optimization and Deliver a Long-Term Low Operating Cost Generating Facility

AI summary The section discusses incorporating design and equipment specifications to optimize plant performance and achieve long-term low operating costs for generating facilities.

Condenser Condenser specification involves matching its operating performance, (i.e. temperature and backpressure) to the turbine as well as taking into consideration long-term maintenance aspects such as cathodic protection, protective co...

AI summary NSPI's condenser design for a thermal generation project involves balancing seawater cooling efficiency with technical challenges, including higher backpressure requirements, elevated condenser positioning, and cost implications. The design includes a divided waterbox for maintenance flexibility and references UARB IR-14 for technical correspondence.

TUC 6 ATO - Summary of Results: NPV Benefit TUC 6 without Duct-Firing vs No TUC 6 (Strategist) $M NPV Benefit TUC 6 with Duct-Firing vs TUC 6 without DF $M Total Project NPV Benefit $M May 2008 Filing 43.84 31.60 75.44 2010 Revision 37.70...

AI summary The document presents a summary of results for TUC 6 ATO, including NPV benefits and costs associated with the project. It compares scenarios with and without duct-firing, showing changes in capital and operating costs over time, with the total project NPV benefit calculated at $75.44M for the May 2008 filing.

alue in the early years and a higher value to customers - the benefit being that, regardless of how it's modeled in the IRP, that benefit will flow through the fuel adjustment mechanism for customers. ... 1 think there are other aspects, o...

AI summary The discussion centers on the Tufts Cove 6 project and its expected performance, particularly its efficiency and capacity factor compared to the reference plan. The speaker argues that the plant will provide significant economic benefits and flexibility, especially with the current natural gas prices and the integration of wind energy.

IN THE MATTER OF AN APPLICATION For Authority to Overspend (ATO) - TUC6 Waste Heat Recovery Project CI#28098 - (P-128.07) NewPage Port Hawkesbury Corp. and Bowater Mersey Paper Company Ltd. ("NPB") Information Requests to Nova Scotia Power...

AI summary The document outlines information requests made by NewPage Port Hawkesbury Corp. and Bowater Mersey Paper Company Ltd. to Nova Scotia Power Inc. regarding the TUC6 Waste Heat Recovery Project and an application for Authority to Overspend (ATO).