VDI 2048 Blatt-3 2012-05 PDF

Full title and description

VDI 2048 Blatt 3:2012-05 — "Messunsicherheiten bei Abnahmemessungen an energie- und kraftwerkstechnischen Anlagen - Beispiele, insbesondere Vorbereitung der Abnahme einer Kombi-Anlage". English title: "Uncertainties of measurement during acceptance tests on energy-conversion and power plants - Examples, especially preparation of acceptance tests of a gas and steam power plant". This guideline complements VDI 2048 Blatt 1 by giving worked examples and a practical case study (combined-cycle gas and steam plant) to show how to plan and evaluate acceptance tests using the VDI 2048 method.

Abstract

This VDI guideline provides example calculations and workflows for assessing measurement uncertainties during acceptance tests of energy-conversion and power-plant installations. It demonstrates how layout data and customer requirements are used to decide the number, location and required accuracy of measurement points, how covariances are evaluated, how auxiliary variables and gross errors are treated, and how the uncertainty of output variables is influenced by different factors. A data carrier (electronic supplement) is supplied to allow pre-calculation and test planning with modified data and uncertainty inputs.

General information

• Status: Current / active.
• Publication date: 2012-05-01 (May 2012).
• Publisher: Verlag des Vereins Deutscher Ingenieure (VDI).
• ICS / categories: 17.020, 27.010.
• Edition / version: VDI 2048 Blatt 3:2012-05.
• Number of pages: 67.

Scope

Provides worked examples that illustrate the application of the VDI 2048 methodology to acceptance (contractual) measurements on power‑generation installations. The scope covers planning of acceptance measurements, selection and positioning of measurement points, treatment of covariances and auxiliary variables, procedures for identifying and analysing gross errors, and an extended case study for preparing the acceptance of a combined-cycle gas and steam plant. The guideline is intended to be used together with VDI 2048 Blatt 1 (fundamentals) and Blatt 2 (additional examples/retrofit examples).

Key topics and requirements

• Application of the VDI 2048 method to acceptance testing in energy and power plants.
• Planning measurement campaigns: deciding number, precision and positions of measuring points.
• Evaluation of covariances between measurements and their influence on result uncertainty.
• Use and treatment of auxiliary variables in uncertainty assessment.
• Techniques for detecting and analysing gross errors and inequalities in measured data.
• Worked example: preparation and pre-calculation for acceptance of a combined-cycle (gas & steam) plant; includes an electronic data carrier for planning and simulation.

Typical use and users

Used by commissioning engineers, test and measurement engineers, metrologists, plant manufacturers, owners/operators of power plants, and consultants involved in acceptance testing and contractual verification of guaranteed plant performance. It is particularly relevant when measurement uncertainty and data reconciliation influence contractual acceptance decisions.

Related standards

VDI 2048 Blatt 1 (fundamentals of the method) and VDI 2048 Blatt 2 (additional examples, retrofit measures) — the three parts form the practical suite for applying the VDI 2048 approach to process and acceptance measurements. The guideline is typically used alongside general guidance on measurement uncertainty (e.g., the ISO GUM family) and sector-specific test guidance for power plants.

Keywords

measurement uncertainty, acceptance tests, power plant testing, combined cycle, covariance, data reconciliation, auxiliary variables, gross error analysis, VDI 2048.

FAQ

Q: What is this standard?

A: VDI 2048 Blatt 3:2012-05 is a VDI guideline providing worked examples and a practical case study for assessing measurement uncertainties during acceptance tests of energy‑conversion and power‑plant installations.

Q: What does it cover?

A: It covers planning and preparation of acceptance measurements (number/position/accuracy of measuring points), evaluation of covariances, treatment of auxiliary variables, inequality handling, gross‑error analysis, and a detailed example for the acceptance of a combined‑cycle gas and steam plant; an electronic data carrier is provided for pre‑calculations.

Q: Who typically uses it?

A: Commissioning and test engineers, plant manufacturers, metrology specialists, power‑plant operators, and consultants responsible for contractual acceptance testing and performance verification.

Q: Is it current or superseded?

A: As published, VDI 2048 Blatt 3:2012-05 is an active/current guideline (published May 2012). Users should check with VDI or official national distributors for any later revisions or replacement editions before use in contractual situations.

Q: Is it part of a series?

A: Yes — it is part of the VDI 2048 series (Blatt 1, Blatt 2 and Blatt 3) which together present the methodology, worked examples and application cases for uncertainty assessment and data reconciliation in operating and acceptance measurements.

Q: What are the key keywords?

A: Measurement uncertainty, acceptance testing, combined‑cycle power plant, covariance, data reconciliation, auxiliary variables, gross‑error analysis, VDI 2048.