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2024 | Book

Air Curtains for Buildings and Industrial Processes


About this book

This book is based on several decades of authors’ research and practical experience in the areas of industrial and commercial buildings ventilation and energy efficiency as well as in process optimization in different types of industrial facilities. The Book discusses different types of air curtains used around the world and describes design, applications, pros and cons and examples for each type of air curtain. The book is illustrated with schematics of air curtains and pictures from their real-life implementation from around-the -world. To compare various design of air curtains, authors propose several indicators/efficiency criteria, which address effectiveness of air curtains, their energy and performance efficiency.

The target audience for this book are energy and process engineers and designers of large commercial and industrial facilities, warehouses, and hangars.

Table of Contents

Chapter 1. Introduction
Air curtains are local ventilation devices used in large commercial, industrial buildings, warehouses, and maintenance facilities to reduce the leakage of airflow through dedicated apertures (gates, doors, windows, etc.) in building enclosures. The operation of air curtains is based on the damping effect of air jets installed and operated near the open aperture. The use of air curtains offers several advantages; they improve working conditions near open apertures, reduce the consumption of heat and electric energy used to heat the building, and reduce the loss of usable working space near the apertures due to ingress of cold air into the building. Well-designed air curtains can improve the indoor air environment of the premises, reduce construction costs, and reduce energy consumption during the building operation by 10–20%.
Alexander Zhivov, Andrey Strongin
Chapter 2. Classification of Air Curtains and Requirements for Their Performance
This book discusses the following types of air curtains:
  • Air curtain that supply heated indoor air (ACHI).
  • Air curtains that supply unheated indoor air (ACUHI).
  • Combined air curtains (CAC).
  • Air curtains with recirculation of unheated outdoor air (ACUHO).
  • Air curtains for cooled spaces (ACC).
  • Mixing-type air curtain (MAC).
  • Combined Air Curtain with a Lobby (CACL)
  • Air curtains for emission prevention from process equipment (used in industrial buildings) (ACPE).
  • Air curtains for activated exhaust hoods (ACH).
Alexander Zhivov, Andrey Strongin
Chapter 3. Indicators/Efficiency Criteria of Air Curtains
Selection of the optimal air curtain type, even determination of parameters to guide selection, requires technical evaluation and economic analysis. This task is made more difficult when the technology will be used in atypical applications or with large-size gates since science-based and field-proven information is not readily available for these less common uses. Air curtain manufacturers’ guidelines are limited; the information they contain does not support optimal air curtain selection. This absence of specific selection criteria or guidelines, when combined with a lack of case studies, can sometimes result in the selection of suboptimal or mismatched technologies that provide poor protection to the building’s apertures. The following performance dimensionless criteria for air curtains support the informed selection of air curtain archetypes.
Alexander Zhivov, Andrey Strongin
Chapter 4. Calculations
The dynamic method of calculating air curtains described in this chapter, which is based on the laws of conservation of impulse and of mechanical energy within an isolated contour, is used to determine the main parameters for air curtain design.
Alexander Zhivov, Andrey Strongin
Chapter 5. Design Methods and Examples of Calculations
These air curtains may be double-sided with a horizontal air supply (Fig. 5.1), or a single-sided with horizontal or vertical air supply.
Alexander Zhivov, Andrey Strongin
Chapter 6. Conclusions
Unprotected open doorways/apertures of buildings and process enclosures can result in an uncomfortable and unhealthy environment and working conditions, significant heat loss, and reduced usable space near the apertures—especially in buildings located in cold climates.
Alexander Zhivov, Andrey Strongin
Air Curtains for Buildings and Industrial Processes
Alexander Zhivov
Andrey Strongin
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Electronic ISBN
Print ISBN