Feedwater System Sample Clauses

Feedwater System. Function The Feedwater System transfers heated feedwater from the heat recovery steam generator (HRSG) low pressure (LP) drums to the respective HRSG high pressure (HP) and intermediate pressure (IP) drums and also maintains the correct HP and IP drum water level over a wide range of steam demands. The Feedwater System also provides feedwater to various desuperheaters, and hot water to the fuel gas heater. The Feedwater System shall consist of the following major components: o One (per HRSG) 100 percent capacity horizontal multistage feedwater pumps with interstage takeoff. (These will be either split-case or segmented ring section design.) o Piping, valves, piping specialties and instrumentation System Description The feedwater pumps take suction from their respective HRSG low pressure drums. The feedwater pumps provide the necessary pumping head to supply feedwater to the HRSG IP and HP steam drums including piping friction losses and differential static head. An automatic recirculation control valve shall be provided for minimum flow recirculation of the feedwater pumps to prevent overheating and cavitation during startup and low load operation. Due to the configuration of the interstage takeoff, minimum flow through the high pressure discharge of the pump satisfies the minimum flow requirements of the interstage bleed and recirculation flow shall be required at the HP discharge only. The minimum flow recirculation valve shall be provided with anti-cavitation trim to accommodate the high pressure drop. Pump runout shall be prevented during initial fill of the HP feedwater system by a flow restricting orifice in parallel with a full flow manual isolation valve. When the HP feedwater -------------------------------------------------------------------------------- Proprietary Information Page 22 AES IRONWOOD CONTRACT FINAL ISSUE - OCTOBER 30, 1998 -------------------------------------------------------------------------------- system is filled, the full flow isolation valve shall be opened, and flow shall be unrestricted. The IP feedwater runout is limited by a back pressure control valve which maintains a minimum backpressure on the interstage bleed during HRSG filling and plant startup. This valve prevents the high pressure stages of the feedwater pump from being starved by the IP interstage takeoff during initial system fill. The feedwater pumps shall be supplied with instrumentation to monitor and alarm on high bearing temperature. Feedwater pump sucti...
View SourceView Similar (4)
Feedwater System. Feedwater systems will be comprised of the following subsystems: · Condenser hotwell level control system · Boiler feed water pump minimum flow control
View Source
Feedwater System. The feedwater system delivers feedwater from the LP steam drum to the IP and HP steam drums through their economizers. The system also supplies desuperheating water to the HP steam attemperator and the hot reheat steam attemperator. There are two (2) boiler feed pumps for each HRSG. One uninstalled spare pump will be provided for the project. The pumps are horizontal, multi-stage type with monitored automatic recirculation control to the LP drum.
View Source

Related to Feedwater System

  • Power System Stabilizers The Developer shall procure, install, maintain and operate Power System Stabilizers in accordance with the requirements identified in the Interconnection Studies conducted for Developer’s Large Generating Facility. NYISO and Connecting Transmission Owner reserve the right to reasonably establish minimum acceptable settings for any installed Power System Stabilizers, subject to the design and operating limitations of the Large Generating Facility. If the Large Generating Facility’s Power System Stabilizers are removed from service or not capable of automatic operation, the Developer shall immediately notify the Connecting Transmission Owner and NYISO. The requirements of this paragraph shall not apply to wind generators.

  • Interconnection Facilities 4.1.1 The Interconnection Customer shall pay for the cost of the Interconnection Facilities itemized in Attachment 2 of this Agreement. The NYISO, in consultation with the Connecting Transmission Owner, shall provide a best estimate cost, including overheads, for the purchase and construction of its Interconnection Facilities and provide a detailed itemization of such costs. Costs associated with Interconnection Facilities may be shared with other entities that may benefit from such facilities by agreement of the Interconnection Customer, such other entities, the NYISO, and the Connecting Transmission Owner. 4.1.2 The Interconnection Customer shall be responsible for its share of all reasonable expenses, including overheads, associated with (1) owning, operating, maintaining, repairing, and replacing its own Interconnection Facilities, and

  • Generating Facility The Interconnection Customer’s device for the production of electricity identified in the Interconnection Request, but shall not include the Interconnection Customer’s Interconnection Facilities.

  • Sprinkler System TWENTY-SIXTH.--If there now is or shall be installed in said building a "sprinkler system" the Tenant agrees to keep the appliances thereto in the demised premises in repair and good working condition, and if the New York Board of Fire Underwriters or the New York Fire Insurance Exchange or any bureau, department of official of the State or local government requires or recommends that any changes, modifications, alterations or additional sprinkler heads or other equipment be made or supplied by reason of the Tenant's business, or the location of partitions, trade fixtures, or other contents of the demised premises, or if such changes, modifications, alterations, additional sprinkler heads or other equipment in the demised premises are necessary to prevent the imposition of a penalty or charge against the full allowance for a sprinkler system in the fire insurance rate as fixed by said Exchange, or by any Fire Insurance Company, the Tenant will at the Tenant's own expense, promptly made and supply such changes, modifications, alterations, additional sprinkler heads or other equipment. As additional rent hereunder the Tenant will pay to the Landlord, annually in advance, throughout the term $ toward the contract price for sprinkler supervisory service.

  • Infrastructure Modification of the location and/or sizing of the infrastructure for the Project that does not materially change the functionality of the infrastructure.