articulate air pollutantsassenger aircraftersonal healthollutant gasesressurized cabins;Quality;Quality assurance;Testing conditions;Thermal comfort【摘要】: This standard specifies requirements and determination methods for newly certificated commercial passengeraircraft programmes.This standard applies to newly certificated commercial passenger aircraft programmes. It may also apply tocurrent production aircraft if it does not carry significant penalties, i.e. if it can be shown to be technicallyfeasible and economically justifiable.This standard covers the period from first crew embarkation to last crew disembarkation.NOTE 1 During embarkation and disembarkation, reduced temperatures in the cabin may be desirable due toincreased metabolic activity of the occupants. In some ground cases, the aircraft environmental control system (ECS) maynot be able to compensate for the external conditions influencing the cabin comfort conditions, such as open doors,extreme hot/cold ground/air temperatures or radiant heat. In this case, external air-conditioning systems, for exampleconditioned low-pressure ground air or high-pressure supply, may be used to supplement the aircraft ECS. If thetemperature range stated in this standard is regularly exceeded (either above or below the stated range), changes toairline and/or airport procedures and/or aircraft design should be introduced.NOTE 2 During ground operations, the external air quality may adversely influence the air quality within the aircraftcabin. Contamination produced as a result of servicing activities or ground operations vehicles may enter the aircraftdirectly, for example via open doors, and the ECS may not be able to effectively control contaminant levels in the cabin.Airline and airport operational procedures should be organised so as to avoid direct contamination of the cabin from thesepollutant sources. If the contaminant ranges stated in this standard are regularly exceeded, changes to airline and/orairport procedures and/or aircraft design should be introduced.Outside air quality levels would usually be regulated by national authorities.The population under consideration – passengers and crew – excludes individuals with pre-existing infirmity orill health conditions.All values given in this document are sea-level equivalent (see Clause 4). According to the Air QualityGuidelines WHO 1999, paragraph 2.2.3, ‘For gaseous pollutants, no increase in effects over thoseexperienced at sea level would be expected as a result of the increase of the inhalation, as the partialpressures of the pollutant gases will fall in line with that of oxygen.’ The limit concentrations at flight altitudecan therefore be defined using pressure ratios.Annex A provides the formula for calculating allowable concentrations at flight altitude.There are many potential sources of contamination, which could affect the aircraft cabin environment. It wouldbe impractical to set limits for all the chemical constituents of these sources.The presence of marker compounds in concentrations that exceed the cabin air quality comfort, health orsafety limits set in the standard may indicate that maintenance, procedural or operational change or designchange is required to bring the air quality back within the limits set in this standard.Several sources have been considered to identify contaminants produced during normal operation. Thepossible sources have been analysed to identify which chemical groupings are related to each one. At leastone compound from each grouping identified for each potential source has been chosen as representative ofthat source.【中国标准分类号】: V44【国际标准分类号】: 49_095【页数】: 40P.;A4【正文语种】: 英语 | 欢迎光临 世界资料网论坛 (http://bbs.infoeach.com/) | Powered by Discuz! X2.5 |