Overview
ISO 3977-1:1997 - Gas turbines - Procurement - Part 1: General introduction and definitions provides the foundational vocabulary and high-level procurement framework for gas turbine systems. It groups relevant terms from ISO 11086 and defines additional terms used across the ISO 3977 series. The part sets common understanding for gas turbine procurement, performance ratings and operating modes for open‑cycle, closed‑cycle, semi‑closed and combined‑cycle gas turbine power plants (excluding aircraft propulsion and some mobile/vehicle types).
Keywords: ISO 3977-1:1997, gas turbines, procurement, definitions, combined-cycle, gas turbine systems, standards.
Key Topics
- Terminology and definitions drawn from ISO 11086 and expanded for procurement use (e.g., gas turbine, gas turbine power plant, compressor, turbine, combustion chamber, control system).
- Thermodynamic cycles and cycle types: open cycle, closed cycle, semi-closed cycle, simple, regenerative, intercooled, reheat, combined cycle.
- Performance and ratings concepts: reference turbine inlet temperature, heat rate, specific fuel consumption, thermal efficiency, rated speed and power, mass-to-power ratio.
- Operational limits and controls: self‑sustaining, idling, maximum continuous and rated speeds; overspeed trip and turbine trip speed; governor droop; dead band.
- Components and auxiliaries definitions: regenerator/recuperator, intercooler, precooler, power turbine, gas generator.
- Protection and instrumentation items: overtemperature detectors, fuel governor valve, fuel stop valve, control and governing systems.
- Procurement guidance: basis for submission of proposals, addressing environmental and safety requirements, minimum purchaser/manufacturer information, and recommendation for technical consultation.
Applications
ISO 3977-1 is used by:
- Procurement engineers and specification writers preparing tender documents for gas turbine supply.
- Gas turbine manufacturers and OEMs preparing proposals and defining responsibilities.
- Project managers, plant owners/operators, and EPC contractors evaluating offers and ensuring contractual clarity.
- Consulting engineers and technical reviewers who need a standardized vocabulary for performance, controls, and cycle type descriptions.
Practical uses include aligning supplier bids, clarifying performance and ambient reference conditions (covered in subsequent parts), and ensuring consistent interpretation of component and system terms across international projects.
Related Standards
- ISO 3977 (series) - Parts include:
- Part 1: General introduction and definitions (this document)
- Part 2: Standard reference conditions and ratings
- Part 3: Basic requirements for mechanical drive and electric drive
- Part 4: Packaging and auxiliary equipment
- Part 5: Controls and instrumentation
- ISO 11086 - Gas turbines - Vocabulary
- ISO 2414 - Gas turbines - Acceptance tests
This part is informative and intended to be used with the other ISO 3977 parts to form a complete procurement specification for gas turbine systems.
