Energi- och värmeöverföring

Ämnesområden: Bränslesystem;
Kommittébeteckning: SIS/TK 410 (Vätgasteknik)
Källa: CEN
Svarsdatum: den 29 apr 2024
Se merSe mindre
 

This document defines the design, safety and operation characteristics of gaseous hydrogen land vehicle (GHLV) refuelling connectors. GHLV refuelling connectors consist of the following components, as applicable: — receptacle and protective cap (mounted on vehicle); — nozzle; — communication hardware. This document is applicable to refuelling connectors which have nominal working pressures or hydrogen service levels up to 70 MPa. This document is not applicable to refuelling connectors dispensing blends of hydrogen with natural gas.

Kommittébeteckning: SIS/TK 405 (Kärnenergi)
Källa: CEN
Svarsdatum: den 6 maj 2024
Se merSe mindre
 

This document applies to the testing of the decontamination of textiles, which are contaminated by radioactive materials. The test method describes the technique to assess the efficiency of decontamination agents (see ISO 7503-1 and ISO 7503-3). This document applies to the testing of detergents, which may be used in aqueous solutions for the purpose of cleaning radioactively contaminated textiles. The radionuclides used in this test are those commonly found in the nuclear industry (60Co and 137Cs or 134Cs) in aqueous form. The test can also be adapted for use with other radionuclides and other chemical forms, depending on the customer requirements, if the solutions are chemically stable and do not damage the test specimen. The test method is not suitable if the radionuclide emits low energy gamma rays, like 55Fe, or low energy beta or alpha particles that are readily attenuated in the textile fabrics, or if the nuclide has a chemical or isotopic interaction with the detergent used in the method (e.g. tritium which could be in several chemical forms). The test method does not apply to the testing of the ability of detergents to remove non-radioactive dirt.

Kommittébeteckning: SIS/TK 467 (Värmepumpar)
Källa: CEN
Svarsdatum: den 10 jun 2024
Se merSe mindre
 

This document is applicable to hydronic fan coil units (FCU) as factory-made single assemblies which provide the functions of cooling and/or heating but do not include the source of cooling or heating. This document is applicable to both air free delivery and air ducted units with a maximum external static pressure due to duct resistance of 300 Pa max. This document specifies methods for the determination of the acoustical performance of fan coil units, defining standard working condition and installation. It is not the purpose of this document to specify the tests used for production or field testing. NOTE For the purpose of remaining clauses, the term "unit" is used to mean "fan coil unit".

Kommittébeteckning: SIS/TK 285 (Pannanläggningar)
Källa: CEN
Svarsdatum: den 10 jun 2024
Se merSe mindre
 

This document applies to shell boilers with volumes in excess of 2 l for the generation of steam and/or hot water at a maximum allowable pressure greater than 0,5 bar and with a temperature in excess of 110 °C. For the purpose of this document the following pressurized parts are included: — the shell boiler as one entity of pressure equipment including all the pressure parts from the feedwater/hot water inlet (including the inlet valve) up to and including the steam/hot water outlet (including the outlet valve or, if there is no valve, the first circumferential weld or flange downstream of the shell boiler or if applicable the outlet header); — all superheaters, economizers and interconnecting piping; — additionally, the piping that is connected to the boiler involved in services such as draining, venting, desuperheating, etc., up to the first isolating valve or, if there is no valve, the first circumferential weld or flange downstream of the shell boiler or if applicable the outlet header/piping. This document does not apply to the following types of boilers and equipments: a) water-tube boilers; b) non stationary boilers, e.g. locomotive boilers; c) thermal oil boilers; d) boilers where the main pressure housing is made of cast material; e) pumps, gaskets, etc; f) brickwork setting and insulation, etc. NOTE 1 Further information on shell boilers is given in Annex A. NOTE 2 Stainless steel boilers are covered by EN 14222:2021.