ISA77.43, Unit/Plant Demand Development

Scope

The scope of this standard is to address the unit/plan demand development subsystem for boilers with steaming capacities of 200,000 lbs/hr (25 kg/s) or greater. This subsystem includes firing rate demand development, throttle/header pressure control, and unit megawatt/steam flow control, as applicable.

This standard will address two types of process applications:

1. A single boiler applying a single turbine, typical of an electric utility power plant.
2. A single or multiple boiler supplying a common distribution header, typical of an industrial power plant.

Specifically excluded from consideration are:

1. Dispatch control
2. Turbine/generator control (other than turbine command)
3. Combustion controls (covered separately by ISA77.41)
4. Steam distribution control systems
5. Economic loading of boilers

Purpose

The purpose of this standard is to establish the minimum requirements for the functional design specifications of unit/plant demand development for control systems for drum-type fossil fueled power plant boilers.

A Word from the Chairman

The standard, ANSI/ISA-77.43.01-2002 (R2008) Fossil Fuel Power Plant Unit/Plant Demand Development–Drum Type, has been published.

The full schedule of ISA77 committee and subcommittee meetings will be posted once finalized.

Cyrus Taft
Chair

Edward Adamson Information Member Invensys Phone: (787) 749-2487	Eliana Brazda Staff Contact ISA Phone: (919) 990-9228 Fax: (919) 549-8288
Danny Crow Voting Member Invensys Foxboro Phone: (972) 564-3854 Fax: (214) 975-1099	Michael Cushing Voting Member Chair Siemens Industry Inc Phone: (267) 470-3507 Fax: (215) 674-7183
Dudley Foreman Information Member Power Consultants Phone: (281) 440-8651	Kenneth Gabel Information Member Centerior Energy Phone: (216) 622-9800 Fax: (216) 604-9800
Wayne Holland Information Member Doosan Power Systems Americas Phone: (770) 235-1356	Robert Hubby Voting Member
Daniel Lee Voting Member ABB Inc Phone: (440) 585-6063 Fax: (440) 585-6020	Ivano Mazza Information Member Trasferimento Di Tech Phone: 05756 03901 Fax: 39575 630390
Randal McSpadden Information Member Vision Controls Co Phone: (918) 259-3034 Fax: (918) 259-4409	David Roney Information Member URS Corporation Phone: (303) 843-3681 Fax: (303) 843-2684
Cyrus Taft Voting Member Taft Engineering Inc Phone: (865) 850-4460 Fax: (865) 248-8348	Joseph Vavrek Information Member Sargent & Lundy LLC Phone: (312) 269-2270 Fax: (312) 269-1901
David Wade Information Member Luminant Power Phone: (214) 875-8265 Fax: (214) 875-8677	Joseph Weiss Managing Director Applied Control Solutions LLC Phone: (408) 253-7934 Fax: (408) 253-7974
Allan Zadiraka Information Member AJ Zadiraka LLC Phone: (234) 738-4578