Description

Immediate dispatch from Somerset. Nice older book in great condition. Pages in good condition. No notes or highlighting. See images. Fantastic book.

About the book >.>.> The new fan aerodynamic performance standard BS 848 Part 1 published in late 1980has superseded its predecessor of some 20 years standing. This standard embodiestechnical resolutions agreed by the International Standards Organisation TechnicalCommittee responsible for fan performance. It is known that some organisations arealready using the new standard for specifications. Moreover because of itssimilarity to other actual and proposed National Standards it is likely to bereadily accepted by international specifiers of fan equipment for determiningsatisfactory levels of performance.The new BS 848 Part 1 has now been available for about 15 to 18 months and in thattime many manufacturers will have begun to assess the implications of the standardnot only in terms of test facilities but in terms of the presentation of the testinformation. The complication of presentation of performance confronts bothmanufacturer and specifier alike. On the one hand the information must be reliablyand accurately provided by the manufacturer and on the other the specifier mustprovide greater detail of the fan application to allow a proper fan selection to bemade. This is likely to cause problems.A further major part of the requirements for a new standard is the up-dating of thePart 2 of BS 848. This up-dating could well appear within the next months andwith those two new standards the fan manufacturers in the UK will have availablestandards embodying the most up to date technical thinking in fan aerodynamics andacoustics.It is proposed to give a brief indication of where the main technical differencesare between the new Part 1 and the old Part 1 and where the proposed Part 2 maydiffer from the old Part 2. An indication of the main difficulty of implementationof these standards will be discussed as well as an indication of the likelydifferences which the user might see in the performance of fans. A possiblepresentation of the various data is included to stimulate interest.