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Standard Axial Fans brochure

Standard Axial Fans brochure

Product catalog summary

Specifications:
The document outlines specifications for axial standard fans, focusing on rated quantities and speed control mechanisms. It details asynchronous speed steps for motors with variable pole numbers, ranging from 2900 to 490 rpm, depending on motor size. The motor's overall size is determined by the highest number of pole pairs, which dictates the fan's rated quantity.

Speed Control:
Two primary methods of speed control are discussed: frequency converters and swirl control devices. Frequency converters offer energy-optimized, infinite control with a wide regulating range, suitable for larger electrical drive capacities and frequent load changes. Swirl control devices allow for simple and reliable volume flow regulation, with optimal energy consumption between 70% and 100% of maximum volume flow.

Output Adaptation:
The document describes the adaptation of performance parameters for VAN fans through adjustable blades. These blades can be set to desired angles during standstill, allowing for performance optimization even if pipeline characteristics deviate from the design. Fans are shipped with pre-set blade positions or limited adjustment ranges based on motor output.

Blade Adjustment:
Blades are adjustable within specified intervals, with plastic blades adjustable without loosening screws, and aluminum blades requiring screw loosening. Proper adjustment ensures each blade is set to the same angle, and the design prevents self-adjustment due to vibrations.

Fan Selection:
Fan selection is based on achieving an operating point within the optimal range of performance characteristics, ensuring maximum efficiency and asynchronous speed. Guidelines are provided for using characteristic curves under various operating conditions, considering factors like air density and atmospheric pressure.

Specifications:
The document outlines specifications for axial fans, focusing on constant volume flow rate regardless of temperature and density changes. Known data includes total pressure increase, volume flow, temperature, site altitude, ambient pressure, pressure at suction side, and absolute pressure at the fan inlet. Reference data includes temperature, density, and air pressure at sea level.

Procedures:
The document provides a method for converting total pressure increase to a reference density of ρ1 = 1.20 kg/m³. It describes the selection of nominal size based on desired volume flow and total pressure increase. Characteristic curves include resistance limit parabolas determined by dynamic pressure at the fan outlet. Optimal design is achieved when the intersection of V/∆pt is near maximum efficiency (ηmax).

Standards and Norms:
According to DIN 1343, standard conditions are defined by a temperature of TN = 273.15 K or tN = 0 °C and a standard pressure of pN = 101325 Pa. The design must consider the temperature dependence of air density and installation height.

Recommendations:
For optimal fan selection, ensure the intersection of V/∆pt is near ηmax to achieve high efficiency and low power requirement. Additional components can be selected from pages 74 to 86 of the catalogue.

Conversion Tables:
The document includes conversion tables for pressure and volume flow units, providing a comprehensive guide for converting between different measurement systems.

Specifications and Standards:
The document references DIN 1343, which defines normal conditions as a temperature of 273.15 K (0°C) and a standard pressure of 101325 Pa. It emphasizes the importance of considering air density and site altitude in fan design, as these factors affect air pressure and density.

Density and Temperature Data:
The document provides tables of air density (ρ1) at various temperatures (t1) ranging from -50°C to 550°C. These tables are crucial for understanding how air density changes with temperature, essential for fan performance calculations.

Fan Design Considerations:
Key formulas for fan selection and calculation are provided, including total pressure increase, static and dynamic pressure, flow velocity, and mass flow rate. The document highlights the need to account for pressure losses in the system and fan components, and the importance of the resistance coefficient and specific delivery.

Proportionality Rules:
The document outlines how changes in speed and density affect volume flow, pressure, and output. Volume flow remains constant regardless of air density changes, while pressures and output change proportionally to density.

Fan and System Characteristic Curves:
The fan characteristic curve (A) shows pressure as a function of volume flow, dependent on impeller type. The system characteristic curve (B) represents total pressure losses in the system. The operating point (C) is where these curves intersect, ideally at maximum efficiency.

Terminology and Units:
The document includes a section on terms, formulas, and units, providing a comprehensive overview of the key concepts and calculations involved in fan design and performance assessment.

Fan Performance and Operating Conditions:
The document discusses the performance characteristics of fans, focusing on the intersection of the fan's characteristic curve and the installation's curve, known as the operating point. Ideally, this point should be in the maximum efficiency zone. Adjustments such as the opening angle of the register and blade setting angle can influence performance.

Speed and Density Variations:
At constant density, the volumetric flow rate varies proportionally with speed, pressure varies with the square of speed, and power varies with the cube of speed. At constant speed, volumetric flow remains unchanged, while pressure and power vary proportionally with density.

Accuracy Classes and Tolerances:
Due to design and manufacturing tolerances, deviations from agreed operating values are allowed, determined by the fan's accuracy class. The DIN 24166 standard outlines permissible deviations for various operating values such as volume flow, pressure increase, drive power, efficiency, and sound power level. Accuracy classes range from 0 to 3, with specific criteria for each class based on application and power range.

Technical Specifications and Standards:
The document provides detailed technical specifications, including volume flow, pressure increase, density, acoustic power level, and efficiency. It also includes connection dimensions according to DIN standards for different fan sizes.

Type Descriptions:
Type descriptions for axial fans include details on the fan's components, such as the impeller, motor, and blade setting angle, with specifications for nominal sizes and configurations.

Main Specifications:
The document provides specifications for Howden standard axial fans, detailing nominal sizes, dimensions, and weights. The dimensions are provided for informational purposes and are not binding. Additional specifications can be requested.

Key Sections:

Direction of Rotation and Conveyance: Information on the direction of rotation and conveyance is provided in multiple languages.
Main Dimensions and Weights: Detailed tables list the nominal sizes, dimensions, and weights of fans without motors, covering various models from VAN 0400 to 2000 and VAV 0250 to 1000.
Performance Characteristics: Overview diagrams illustrate performance characteristics for different impeller diameter ratios, providing insights into volume flow and total pressure increase.
Type Descriptions: Explanation of type descriptions for VAV(R) fans, including blade setting angles, impeller diameter ratios, and motor specifications.

Data Tables:
The document includes extensive tables with dimensions such as dN, dK, d1, d2, l1, l2, and mass without motor for various fan models. These tables are crucial for understanding the physical specifications of each fan type.

Diagrams:
Performance diagrams provide visual representations of volume flow versus total pressure increase, aiding in the selection of appropriate fan models based on specific performance needs.

Overview: This document provides technical specifications and details for Howden's standard axial fans, including dimensions, weights, and performance characteristics. It covers various fan models and their components, offering guidance on installation and accessories.

Main Sections:

Specifications: The document lists nominal sizes, dimensions, and weights for different fan models, ranging from 250 mm to 1000 mm in diameter. It includes details such as mass without motor, flange sizes, and bolt patterns.
Performance Characteristics: Performance charts illustrate volume flow rates and total pressure increases for various fan types, indicating their efficiency and operational capabilities.
Type Descriptions: An explanation of type designations is provided, detailing the nominal size, motor pole number, and rated motor output in kW.
Accessories: The document describes available accessories such as suction nozzles, additional pipes, support feet, anti-vibration mounts, compensators, and silencers. These components are designed to enhance fan performance and installation flexibility.
Installation Guidelines: Instructions for horizontal and vertical installations are included, along with details on support brackets and anti-vibration solutions.

Key Data from Tables:

Dimensions and weights for each fan model are provided, including specific measurements for components like flanges and extension ducts.
Performance charts show the relationship between volume flow and pressure increase, helping users select the appropriate fan model for their needs.

Critical Information:

All dimensions are for informational purposes and not binding; additional specifications are available upon request.
Fans are available with or without guide vanes, affecting their performance characteristics.
Accessories are load-dependent and should be selected based on specific installation requirements.

Catalog excerpts

www.howden.com AXIAL – STANDARDVENTILATOREN STANDARD AXIAL FANS I VENTILATEURS HÉLICOÏDES STANDARDS I ОСЕВЫЕ ВЕНТИЛЯТОРЫ HOWDEN TURBOWERKE GMBH

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AXIAL-STANDARDVENTILATOREN I FIRMENPROFIL 1 deutsch français по русски Firmenprol COMPANY PROFILE PROFIL DE L‘ENTREPRISE СФЕРЫ ИСПОЛЬЗОВАНИЯ Die Howden Turbowerke GmbH ist ein weltweit tätiges Unternehmen mit über 100-jähriger Erfahrung im Ventilatorenbau. Wir sind ein Mitglied der Howden-Group, einem der weltweit größten Hersteller von Ventilatoren. Howden Turbowerke GmbH is a globally active company with over 100 years of experience in fan design and production. We are a member of the Howden-Group, one of the world’s largest producers of fans. Howden Turbowerke GmbH conçoit et fabrique des...

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2 AXIAL-STANDARDVENTILATOREN I INHALT 3 deutsch english français по русски INHALTSVERZEICHNIS TABLE OF CONTENTS TABLE DES MATIÈRES СОДЕРЖАНИЕ Vorwort Forewords Préface Предисловие 2 Inhaltsverzeichnis Table of contents Table de matières Содержание 4 Vorstellung Axial-Standardventilatoren Conception standard axial fans Présentation Ventilateurs hélicoïdes standards Представление осевых стандартных вентиляторов 8 Anwendungsgebiete und Einsatzgrenzen Applications and operational limits Domaines d’application et limites d’utilisation Сферы использования и границы применения 10 Konstruktive Merkmale...

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4 AXIAL-STANDARDVENTILATOREN I ALLGEMEINES 5 deutsch english français по русски VORSTELLUNG AXIAL-STANDARDVENTILATOREN CONCEPTION STANDARD AXIAL FANS PRÉSENTATION VENTILATEURS HÉLICOÏDES STANDARDS ПРЕДСТАВЛЕНИЕ ОСЕВЫХ СТАНДАРТНЫХ ВЕНТИЛЯТОРОВ VAN 0400 – 1000 VAN 0400 – 1000 VAN 0400 – 1000 VAN 0400 – 1000 Axialventilator mit Nachleitapparat Drehrichtung links in Förderrichtung Für beidseitigen Rohranschluß Antrieb direkt oder Keilriemen Aluminiumglocke mit Kunststoffschaufeln oder Aluminiumschaufeln Im Stillstand verstellbare Schaufeln Nabenverhältnis 0,5; 0,56; 0,63 Druckbereich bis 1100 Pa...

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6 AXIAL-STANDARDVENTILATOREN I ALLGEMEINES 7 deutsch english français по русски VORSTELLUNG AXIAL-STANDARDVENTILATOREN CONCEPTION STANDARD AXIAL FANS PRÉSENTATION VENTILATEURS HÉLICOÏDES STANDARDS ПРЕДСТАВЛЕНИЕ ОСЕВЫХ СТАНДАРТНЫХ ВЕНТИЛЯТОРОВ VANK 0500 – 1000 VANK 0500 – 1000 VANK 0500 – 1000 VANK 0500 – 1000 Axialventilator mit Nachleitapparat und aufklappbarem Gehäuse Drehrichtung links in Förderrichtung Für beidseitigen Rohranschluß Antrieb direkt Aluminiumglocke mit Kunststoffschaufeln oder Aluminiumschaufeln Im Stillstand verstellbare Schaufeln Nabenverhältnis 0,5; 0,56; 0,63 Druckbereich...

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8 AXIAL-STANDARDVENTILATOREN I ANWENDUNG UND EINSATZ 9 deutsch english français по русски ANWENDUNGSGEBIETE UND EINSATZGRENZEN APPLICATIONS AND OPERATIONAL LIMITS DOMAINES D’APPLICATION ET LIMITES D’UTILISATION СФЕРЫ ИСПОЛЬЗОВАНИЯ И ГРАНИЦЫ ПРИМЕНЕНИЯ Anwendung in Anlagen und Geräten zur Beund Entlüftung, Trocknung, Absaugung, Kühlung und Klimatisierung, vorzugsweise als Rohr- oder Düsenventilator Application in systems and units for ventilation, aeration and drying, extraction, cooling and air conditioning, preferably as pipe or nozzle fan Application dans des installations de ventilation, aération,...

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10 AXIAL-STANDARDVENTILATOREN I KONSTRUKTION UND ANTRIEB 11 deutsch english français по русски KONSTRUKTIVE MERKMALE DESIGN CHARACTERISTICS CARACTÉRISTIQUES DE CONSTRUCTION КОНСТРУКЦИОННЫЕ ОСОБЕННОСТИ Die Baureihen bestehen aus 3 Teilreihen mit drei verschiedenen Laufraddurchmesserverhältnissen 0,50; 0,56 und 0,63 und sind in der Nenngrößenabstufung nach der Normalzahlenreihe gemäß DIN 323 R 20 aufgebaut. Damit wird eine dichte Kennfeldabdeckung erreicht. The lines consists of 3 components with three different ratios of impeller diameters 0,50; 0,56 and 0,63 and the rated quantity stages are...

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12 AXIAL-STANDARDVENTILATOREN I LEISTUNGSANPASSUNG UND -REGELUNG 13 deutsch english français по русски LEISTUNGSANPASSUNG UND LEISTUNGSREGELUNG FÜR ALLE VENTILATOREN OUTPUT ADAPTATION AND REGULATION FOR ALL FANS ADAPTATION DES CARACTÉRISTIQUES POUR TOUS LES VENTILATEURS СОГЛАСОВАНИЕ ПО МОЩНОСТИ И РЕГУЛИРОВКА ПРОИЗВОДИТЕЛЬНОСТИ ДЛЯ ВСЕХ ВЕНТИЛЯТОРОВ 1. Drehzahlregelung durch Einsatz polumschaltbarer Motoren 1. Speed control by means of pole changing motor 1. Réglage de la vitesse de rotation en utilisant des moteurs à nombre de pôles variables 1. Регулировка количества оборотов за счет использования...

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AXIAL-STANDARDVENTILATOREN I 14 LEISTUNGSANPASSUNG UND LEISTUNGSREGELUNG 15 deutsch Bild / Ill. / Fig. / Рис. 2 Aluminiumnabe mit Aluminiumschaufel Aluminium hub with aluminium blades Moyeu en aluminium avec pales en aluminium Cтупица из алюминия с алюминиевыми лопатками 2 +20° 0 2. Согласование по мощности The adaptation of the performance parameters by to the desired operating point by means of blades that can be adjusted during standstill. The characteristic curves emphasized in the performance characteristics VAN 0400 ... 2000 represent individual characteristic curves within the innitely...

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16 AXIAL-STANDARDVENTILATOREN I AUSWAHL VON VENTILATOREN 17 deutsch Индекс 1 Index 2 Index 2 Index 2 Индекс 2 Gewünschter Betriebspunkt Desired operating point Point de fonctionnement souhaité Желательная рабочая точка p . t2 V t2 hOrt pOrt pstat1 [Pa] [m³/s] [°C] [m] [Pa] [Pa] p2 [Pa] t1 1 pN 2 pt1 20 [°C] 1,20 [kg/m³] 101325 [Pa] [kg/m³] [Pa] по русски FAN SELECTION SÉLECTION DE VENTILATEURS ВЫБОР ВЕНТИЛЯТОРОВ Benutzung der Kennlinien bei verschiedenen Betriebszuständen: Bezugswert im Kennfeld von ρ1 = 1,20 kg/m³ bei pN = 101325 Pa und t1 = 20 °C Reference value in the characteristic curve...

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