Alstom Technology Limited

General Electric Technology Gmbh

Rahul Jayant Terdalkar

Apurba Kumar Das

Wesley Paul Bauver, Ii

Abhinaya Joshi

Donald William Bairley

Pedro Israel Inigo

Suresh K Shenoy

Gary Pashko

Joseph W Quinn

Ronald Girard Payne

Ian J Perrin

Christopher J Lech

Thomas W Sambor

Glenn T Selby

David McGrane

Wesley P Bauver

John David McGrane

Robert Derosa

Romain Girard

Lionel Aimi

Alain Adrien Kukonya

Lin Deng

John Tweedie

Michael M Clark

Jay Brian Anderson

Wesley Paul Bauver Ii

Ian James Perrin

Wesley Paul Ii Bauver

Pedro Inigo

Suresh Shenoy

Wesley P Bauver Ii

Ii Bauver Wesley Paul

A molten salt central receiver arrangement for transferring heat from panels to a molten salt that flows through the panels. A control device allows to change the condition of at least one of the panel arrangements of the molten salt central receiver arrangement depending on at least an operating parameter of at least one panel and/or depending on an environment signal that characterizes the actual or forecast available heat for the heat transfer to the molten salt. In normal operation passes, each having one or more panels, are connected in series such that molten salt flows in a serpentine or alternating way upward and downward through subsequent passes. In a parallel flow condition, molten salt may flow upward through all of the panels in parallel. In a drain condition, the molten salt is forced out of one or more panels and replaced by compressed air.

Molten salt central receiver arrangement and operating method

The present disclosure is directed to a method and a system employing a gas introduced into the system as a startup operation for a natural circulation vertical heat recovery steam generator (HRSG) to initiate natural circulation of a fluid within the system. More specifically, the present disclosure is directed to a method and a system employing a gas introduced into an outlet header of an evaporator, into an outlet header of an evaporator and into one or more risers near the outlet header of the evaporator, or into one or more risers near the outlet header of the evaporator, to initiate natural circulation of a fluid in a desired system direction from the evaporator directly into a steam drum.

Method and system for gas initiated natural circulation vertical heat recovery steam generator

A heat exchanger apparatus for receiving water from a steam drum () and providing steam and heated unevaporated liquid water to the steam drum includes a first evaporator (EVAP-) and a second evaporator (EVAP-). The first evaporator can receive water from a steam drum via a first feed conduit () and the second evaporator can receive water from a second feed conduit (). Both evaporators can output heated fluid to the steam drum via a combined evaporator output conduit (). Each first evaporator passageway () only makes a single pass through a gas duct () having a heated gas flow () passing therethrough while each second evaporator passageways () can make one or more passes through the gas duct for transferring heat from the gas to the fluid within the evaporators. A portion of the first feed conduit can also have a pre-specified volume a pre-specified height below the first inlet ().

Evaporator apparatus and method of operating the same

A solar receiver configuration (receiver) adapted to include a plurality of receiver heat transfer passes. Each pass includes a plurality of panels. Further, each panel includes a plurality of tubes, tangentially arranged, vertically extending between horizontally placed lower and upper headers. The headers, which are pipe assemblies with closed ends, of adjacent panels are horizontally and vertically offset one to another to form a substantially continuous tube surface. Such continuous tube surface enables solar heating of the fluid flow therefrom in at least a parallel flow arrangement and a serpentine flow arrangement.

Solar receiver configuration

A solar thermal power system includes a solar receiver for heating thermal energy storage fluid to be stored and utilized from a thermal energy storage arrangement having hot and cold storage tanks. The system includes a steam generator arrangement, which utilizes the heat of the thermal energy storage fluid to produce steam to run a turbine. The arrangement includes a bypass line configured to bypass the hot storage tank from the steam generator arrangement, and to supply the hot thermal energy storage fluid from the solar receiver directly to the steam generator arrangement, during day times, when the solar receiver the steam generator arrangement are both in operating mode, thereby recovering stored potential energy available in the down corner hot thermal energy storage fluid from the solar receiver.

Bypass system for a solar thermal power plant

In a nozzle and a nozzle assembly, for use in a pressure vessel, stress analysis is used to determine areas of stress concentration. The nozzle is configured to reduce these stress concentrations.

Nozzle and nozzle assembly configured to minimize combined thermal and pressure stress during transients

System and method for pre-startup or post-shutdown preparation for such power plants are disclosed which are subject to frequent startups and shutdowns, such as a solar operated power plant. The system and method introduces an auxiliary fluid flow to be circulated in an opposite direction to a direction of normal working fluid flow responsible for producing electricity. That is, if the working fluid flow in a first direction for operating the power plant, than the auxiliary fluid flows in a second direction, opposite to the first direction. The auxiliary fluid flows in the second direction for a predetermined time and at a predetermined conditions through a plurality of superheater panel arrangements of solar receiver former to activation of the working fluid circuit, as pre-startup preparation of the power plant, and after cessation of the working fluid circuit, as post-shutdown preparation of the power plant, to attain predetermined conditions in the superheater.

System and method for auxiliary fluid circuit heating or cooling of a superheater during startup and shutdown operations

An auxiliary steam supply system in a solar power plant includes a solar receiver having a superheater section, a turbine, a steam circuit, a thermal energy storage arrangement and an auxiliary steam circuit. The thermal energy storage arrangement, including a thermal energy storage medium, is configured for the steam circuit to receive a portion of the steam to heat the thermal energy storage medium. The thermal energy storage arrangement may receive the steam from any location across the superheater section. Moreover, the auxiliary steam circuit generating auxiliary steam flow, which thermally communicates with the thermal energy storage arrangement to be heated, is introduced to any location across the superheater section. Capacity of the thermal energy storage arrangement may be relatively small as compared to the solar receiver and may be compact for placement on top of a tower.

Auxiliary steam supply system in solar power plants

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East Windsor, CT, United States of America

Rahul Jayant Terdalkar