Railway applications — Principles of train detection for operations and services
The scope of this document is to provide generic principles of train detection, related operation management principles, and to show the link between them. It provides non-technical guidance for supporting the choice of a suitable train detection method relating to railway operation.
It includes:
the generic principles of train detection.
a list of operational and environmental conditions…
Plain bearings — Hydrodynamic plain journal bearings under steady-state conditions — Part 1: Calcula...
This document specifies the general principles, assumptions and preconditions for the calculation of multi-lobed and tilting-pad journal bearings by means of an easy-to-use calculation procedure based on numerous simplifying assumptions. For a reliable evaluation of the results of this calculation method, it is indispensable to consider the physical implications of these assumptions as well as…
This document describes minimum requirements for small spacecraft.
Small spacecraft may employ untraditional spacecraft development and management philosophy. These spacecraft projects are usually budget-limited or mass-limited, which makes a single (exclusive) launch unaffordable.
The scope of this document encompasses different categories of small spacecraft — so-called mini-, micro-, nano-,…
Plain bearings — Hydrodynamic plain journal bearings under steady-state conditions — Part 4: Permiss...
This document establishes the permissible operational parameters in terms of guide values for the calculation of selected multi-lobed and tilting-pad journal bearings.
In order to attain a sufficient operational safety of multi-lobed and tilting-pad journal bearings by the calculation according to ISO/TS 31657-1, it is necessary for the operational characteristic value hmin to be significantly…
The provisions of this document apply to Single-Stage and economised refrigerant compressors of the positive displacement type. Selected test methods are described for the determination of the refrigerating capacity, the power, the isentropic efficiency and the coefficient of performance. These test methods provide results of sufficient accuracy to permit consideration of the suitability of a…
Plain bearings — Hydrodynamic plain journal bearings under steady-state conditions — Part 2: Charact...
This document specifies the characteristic values for selected two-, three- and four-lobe bearings.
The functions plotted and listed in table form below are required for the operationally safe design of hydrodynamic multi-lobed journal bearings according to ISO/TS 31657-1. They are based on the presumptions and boundary conditions indicated there and only apply to stationary operating states. The…
Railway applications — Heating, ventilation and air conditioning systems for rolling stock — Part 4:...
This document covers the following as a guideline:
- the basic design parameters to be provided to the HVAC unit manufacturer by the rolling stock manufacturer and the railway operator;
- the basic test/inspection items, requirements and methods used by the HVAC unit manufacturer.
