Page 4 - FANS. Aerodynamic _Selection Meethod__Combine_part2

Zhdanov. Part I. The author of the text and the developer:

engineer Zhdanov V.P. Minsk, Belarus.

“FANS. AERODYNAMIC “SELECTION METHOD”

(IN CAPTIVITY AT DYNAMIC PRESSURE)

Part I.

What is in this article?

 Criticism of the existing theory and practice of fan selection. 'Safety
factors'.
 Refine the theory. New options. Exact 'working point of the fan.'
 The method of selection of the fan on the new parameters. The
solution to the global problem of energy saving in ventilation

systems.
 Stand for testing the fan when getting new parameters.
 Pressure distribution graph.

Notes.

1. This article deals only with a centrifugal fan.
2. The author occupies an unambiguous position - 'at full pressure'
(including for all types of fans).
3. All drawings (graphics) of the aerodynamic characteristics of the fan
and ventilation networks are depicted on a linear (including
proportional) scale.
4. This article does not address the issue of technical errors in the
design of the ventilation network (including its configuration,

equipment layout, local resistance coefficients, etc.). It is believed
that the drop in total pressure in the ventilation network is
aerodynamically calculated accurately.
5. This article is intended primarily for leading ventilation companies
with aerodynamic laboratories; for organizations that make technical
proposals and recommendations when creating technical normative

legal acts (TNLA).

Attempts are being made periodically to revitalize the need to begin actions
to conserve electrical energy in ventilation and air conditioning systems.