Energi- och värmeöverföring

This document describes the method of determining the total moisture content of a test sample of solid biofuels by drying in an oven and is used when the highest precision is not needed, e.g. for routine production control on site. The method described in ISO 18134 (all parts) is applicable to all solid biofuels. The moisture content of solid biofuels (as received) is always reported based on the total mass of the test sample (wet basis).
NOTE Biomass materials can contain small amounts of volatile organic compounds (VOC) which can evaporate when determining moisture content by oven drying (see References [1] and [2]). The release of such compounds is quite small relative to the overall moisture content as determined by this method and is disregarded in this document.

This document defines the minimum requirements to ensure the interoperability of hydrogen refuelling points, including refuelling protocols that dispense gaseous hydrogen to road vehicles (e.g. Fuel Cell Electric Vehicles) that comply with legislation applicable to such vehicles.
The safety and performance requirements for the entire hydrogen fuelling station, addressed in accordance with existing relevant European and national legislation, are not included in this document.
This document applies to hydrogen refuelling points dispensing gaseous hydrogen to vehicles compliant with UN R134 (Regulation No. 134), UN R134 or Regulation (EC) No 79/2009.
NOTE 1 Guidance on considerations for hydrogen fuelling stations is provided in ISO 19880-1:2020.
NOTE 2 Units used in this document follow SI (International System of Units).

This part of ISO/IEC 80079 covers the technical requirements necessary to avoid or minimize the significant hazards listed in Clause 4, which could occur during normal operation, maintenance or foreseeable malfunction of reciprocating internal combustion engines intended for use in explosive atmospheres including - Group I EPL Mb for use in underground workings susceptible to firedamp and/or combustible dust, - Group II EPL Gb and Gc for use in potentially explosive atmospheres of flammable gas and vapour and - Group III EPL Db and Dc for use in potentially explosive atmospheres of combustible dust. This part of ISO/IEC 80079 includes those tests of the engine and its ancillary devices that are required to verify compliance. This part of ISO/IEC 80079 applies to reciprocating internal combustion engines with compression ignition and spark ignition. This part of ISO/IEC 80079 does not define requirements relating to the driven machinery and equipment. This part of ISO/IEC 80079 does not apply - to flammable gas and vapour atmospheres containing carbon disulphide (CS2) and/or ethylene oxide (C2H4O) due to special properties of these gases; - to explosive mixtures of vapours and gases, which tend to self-decompose (e.g. acetylene) or which are chemically unstable.This International standard does not apply to engines used in areas for the processing manufacture or storage of explosives; - to gasoline engines and all other liquid injection spark ignited engines. This part of ISO/IEC 80079 solely deals with explosion protection requirements. Requirements on emissions are not covered by this standard. General safety requirements are not included in this International Standard. NOTE 1 General safety requirements i.e. those common to internal combustion engines, are covered for the EU in EN 1679-1:1998+A1:2011. This part of ISO/IEC 80079 does not specify requirements for safety, other than those directly related to the risk of ignition which may then lead to an explosion.The standard atmospheric conditions (relating to the explosion characteristics of the atmosphere) under which it may be assumed that engine can be operated are: - temperature -20 °C to +40 °C; - pressure 80 kPa (0,8 bar) to 110 kPa (1,1 bar); and - air with normal oxygen content, typically 21 % v/v. Such atmospheres can also exist inside the engine. In addition, the external atmosphere can be drawn inside the engine by natural breathing produced as a result of fluctuations in the engine's internal operating pressure, and/or temperature. NOTE 2 It is considered that −20 °C to +40 °C is appropriate for most engines. However for equipment designed for outside this range IEC/TS 60079-43 should be considered. NOTE 3 The requirements of this standard can also be helpful for the design, construction, testing and marking of engine intended for use in atmospheres outside the validity range stated above. In this case however, the ignition hazard assessment, ignition protection provided, additional testing (if necessary), manufacturer’s technical documentation and instructions to the user, should clearly demonstrate and indicate the engine's suitability for the conditions it may encounter. It should also be recognized that changes in temperature and pressure can have a significant influence on characteristics of the explosive atmosphere, such as ignitability (see Annex I). NOTE 4 Reciprocating internal combustion engines are not considered as pressure vessels.

This document specifies the minimum requirements for rubber hoses and hose assemblies for use in oil burners.
The following two types of hose assembly are specified:
— Type 1: Hose assemblies for flux and reflux, but not for insertion between the oil burner pump and the atomizing connection; maximum working pressure 1,0 MPa (10 bar); maximum oil temperature
100 °C.
— Type 2: Hose assemblies for insertion between the oil burner pump and the atomizing connection;
maximum working pressure 4,0 MPa (40 bar); maximum oil temperature 100 °C.
The hose assemblies specified in this document are not intended to be used, without special assessment, for purposes other than oil burner installations.

This document specifies the applicable requirements related to the design and the operation of confinement and ventilation systems for fusion nuclear facilities for tritium fuels and tritium fuel handling facilities specific for fusion nuclear applications for peaceful purposes using high tritium
inventories, as well as for their specialized buildings such as hot cells, examination laboratories, emergency management centres, radioactive waste treatment and storage facilities.
In most countries, a tritium quantity is declared as high for tritium inventories higher than a range of 10-100 g. In the tritium fusion facilities in the scope of this document, the tritium inventory is deemed to be higher than this range.
document applies especially to confinement and ventilation systems that ensure the safety function of nuclear facilities involved in nuclear fusion with the goal to protect the workers, the public and the environment from the dissemination of radioactive contamination originating from the operation of
these installations, and in particular from airborne tritium contamination with adequate confinement systems.
The other types of confinement systems for other facilities are covered by ISO 26802 for fission nuclear reactors and by ISO 17873 for facilities other than fission nuclear reactors. Therefore, the scope of this document does not cover the facilities already covered by ISO 17873 and ISO 26802. The other nuclear facilities involved in tritium releases are excluded from the scope of this document, even though they create tritium releases (e.g. fission facilities, tritium laboratories, tritium removal facilities from fission plants, tritium defence facilities).

This document specifies two procedures to check the performance of solar thermal collector fields. This document is applicable to glazed flat plate collectors, evacuated tube collectors and/or tracking, concentrating collectors used as collectors in fields.
The check can be done on the thermal power output of the collector field and also be on the daily yield of the collector field.
The document specifies for the two procedures how to compare a measured output with a calculated one.
The document applies for all sizes of collector fields.

This document establishes the terms, definitions, symbols and abbreviations used in the fields related to hydrogen in energy systems.
This document excludes the following fields:
— biological methanation,
— reactor for hydrogen production from other sources,
— road, maritime and aviation transport,
— aeronautics and space.
Note These fields are foreseen to be covered in future editions of this document.
This document does not apply to carbon capture storage and utilisation, as well as services.