{"id":273058,"date":"2024-10-19T18:20:03","date_gmt":"2024-10-19T18:20:03","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-162112015\/"},"modified":"2024-10-25T14:40:48","modified_gmt":"2024-10-25T14:40:48","slug":"bs-en-162112015","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-162112015\/","title":{"rendered":"BS EN 16211:2015"},"content":{"rendered":"

This European Standard specifies simplified methods for the measurement of air flows on site. It provides a description of the air flow methods and how measurements are performed within the margins of stipulated method uncertainties.<\/p>\n

One measurement method is to take point velocity measurements across a cross-section of a duct to obtain the air flow. This simplified method is an alternative to the method described in ISO 3966<\/span> <\/span> and EN 12599<\/span> <\/span>. This European Standard requests certain measurement conditions (length of straight duct and uniform velocity profile) to be met to achieve the stipulated measurement uncertainties for the simplified method.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
4<\/td>\nContents Page <\/td>\n<\/tr>\n
6<\/td>\nForeword <\/td>\n<\/tr>\n
7<\/td>\n1 Scope
2 Normative references
3 Terms, definitions and symbols
3.1 Terms and definitions
3.2 Symbols <\/td>\n<\/tr>\n
9<\/td>\n4 Principles and parameters of influence
4.1 Hydraulic diameter
4.2 Flow disturbances
4.3 Air density, \u03c1
4.4 Dynamic pressure, pd <\/td>\n<\/tr>\n
10<\/td>\n4.5 Corrections for air density, \u03c1
5 Sources of errors
5.1 General <\/td>\n<\/tr>\n
11<\/td>\n5.2 Systematic errors
Figure 1 \u2014 Explanation of systematic error <\/td>\n<\/tr>\n
12<\/td>\n5.3 Random errors
6 Measurement uncertainty
6.1 Overall measurement uncertainty <\/td>\n<\/tr>\n
13<\/td>\n6.2 Standard instrument uncertainty, u1
6.3 Standard method uncertainty, u2
6.4 Standard reading uncertainty, u3
6.5 Expanded measurement uncertainty, Um <\/td>\n<\/tr>\n
14<\/td>\n7 Measurement requirements
7.1 Method requirements and corrections
7.2 Measurements using a manometer
Table 1 \u2014 Resolution for the ranges of manometers <\/td>\n<\/tr>\n
15<\/td>\n7.3 Measurements using an anemometer
7.4 Measurements using Pitot static tube
7.5 Measuring temperature and barometric pressure
7.6 Mean value calculation of measurement signal
8 Methods for measurement of air flows in ducts \u2013 ID (In Duct) methods
8.1 Overview of recommended methods <\/td>\n<\/tr>\n
16<\/td>\nTable 2 \u2014 Methods of measurement of airflows in duct
8.2 Point velocity measurements using a Pitot static tube (method ID 1) or an anemometer (method ID 2)
8.2.1 Method description <\/td>\n<\/tr>\n
17<\/td>\nFigure 2 \u2014 Measurements with Pitot static tubes
8.2.2 Preparations to be made at the site of measurement
8.2.2.1 Equipment <\/td>\n<\/tr>\n
18<\/td>\n8.2.2.2 Necessary straight sections before and after the plane of measurement
Table 3 \u2014 Necessary straight sections before and after the plane of measurement
8.2.2.3 Preparation procedure and selection of measuring planes <\/td>\n<\/tr>\n
19<\/td>\nTable 4 \u2014 Measurement points for circular ducts
Table 5 \u2014 Measurement points for rectangular ducts related to the longer dimension: L2
Table 6 \u2014 Measurements points for rectangular ducts related to the longer dimension \u2014 Values recalculated in accordance with L2 <\/td>\n<\/tr>\n
20<\/td>\nTable 7 \u2014 Measurements points for rectangular ducts on the height, L1
Figure 3 \u2014 Cases A and B \u2014 Cross-section of a horizontal duct \u2014 A bent upstream is in a horizontal or vertical plane
8.2.3 Measurement procedure <\/td>\n<\/tr>\n
21<\/td>\n8.2.4 Corrections of measured values and calculation of air flow
Figure 4 \u2014 Correction factor k1 for density <\/td>\n<\/tr>\n
22<\/td>\nTable 8 \u2014 Correction for duct shape k2 for circular ducts
Table 9 \u2014 Correction for duct shape k2 for rectangular ducts
8.2.5 Standard method uncertainty
8.3 Fixed devices for flow measurement \u2013 Method ID 3
8.3.1 Method description
8.3.2 Preparations of measurements \u2014 Equipment <\/td>\n<\/tr>\n
23<\/td>\n8.3.3 Measurement procedure
8.3.4 Correction of measured values
8.3.5 Standard method uncertainty
8.4 Tracer gas measurement \u2013 Method ID 4
8.4.1 Method description <\/td>\n<\/tr>\n
24<\/td>\n8.4.2 Equipment
Figure 5 \u2014 Tracer gas measurement equipment <\/td>\n<\/tr>\n
25<\/td>\nFigure 6 \u2014 Nozzle device for injecting tracer gas
8.4.3 Calculation of air flow
Table 10 \u2014 Example of density of N2O
8.4.4 Standard measurement uncertainty <\/td>\n<\/tr>\n
26<\/td>\n8.4.5 Conditions for homogeneous mixing of tracer gas
Table 11 \u2014 Mixing length (L) required for standard method uncertainty to fall below 5 % and 10 % <\/td>\n<\/tr>\n
27<\/td>\n9 Methods for measurement of air flows in Supply ATDs (air terminal devices) \u2013 ST (Supply (Air) Terminal (Devices)) methods
9.1 Overview of recommended methods
Table 12 \u2014 Methods of measurement of supply airflows at ATD
9.2 Measurement of reference pressure \u2013 Method ST 1
9.2.1 Introduction <\/td>\n<\/tr>\n
28<\/td>\nFigure 7 \u2014 Example: Effects of disturbance from a 90 bend for terminal with pressure nozzles in the intake
9.2.2 Equipment
9.2.3 Correction of measured values <\/td>\n<\/tr>\n
29<\/td>\n9.2.4 Standard method uncertainty
9.3 Measurement with tight bag \u2013 Method ST 2
9.3.1 Method description
Figure 8 \u2014 The principles of the measurement bag method
9.3.2 Limitations
9.3.3 Equipment <\/td>\n<\/tr>\n
30<\/td>\n9.3.4 Preparation
9.3.5 Measurement
9.3.6 Correction of measured values
9.3.7 Standard method uncertainty
9.4 Measurements with flow hood \u2013 Method ST 3
9.4.1 Introduction <\/td>\n<\/tr>\n
31<\/td>\n9.4.2 Equipment <\/td>\n<\/tr>\n
32<\/td>\nFigure 9 \u2014 Example of measurement using method ST 31
Figure 10 \u2014 Flow hood with auxiliary fan (ST 32)
9.4.3 Measurement <\/td>\n<\/tr>\n
33<\/td>\n9.4.4 Correction of measured values
9.4.5 Standard method uncertainty <\/td>\n<\/tr>\n
34<\/td>\n10 Methods for Exhaust ATDs (air terminal devices) \u2013 ET (Exhaust (Air) Terminal (Devices)) methods
10.1 Overview of recommended methods
Table 13 \u2014 Methods of measurement of exhaust airflows at ATD
10.2 Measurement of reference pressure at exhaust ATD \u2013 Method ET 1
10.2.1 Method description <\/td>\n<\/tr>\n
35<\/td>\nFigure 11 \u2014 Example of measurement using Method ET 1
10.2.2 Limitations
10.2.3 Equipment
10.2.4 Correction of measured values <\/td>\n<\/tr>\n
36<\/td>\n10.2.5 Standard method uncertainty
10.3 Measurement using a flow hood \u2013 Method ET 2
10.3.1 Introduction
10.3.2 Equipment <\/td>\n<\/tr>\n
37<\/td>\nFigure 12 \u2014 Example of measurement using method ET 21
Figure 13 \u2014 Example of measurement using method ET 22
10.3.3 Measurement <\/td>\n<\/tr>\n
38<\/td>\n10.3.4 Correction of measured values
10.3.5 Standard method uncertainty <\/td>\n<\/tr>\n
39<\/td>\nAnnex A (informative) Uncertainties
A.1 Examples of calculations <\/td>\n<\/tr>\n
40<\/td>\nA.2 Compound uncertainties
A.3 Example of applications <\/td>\n<\/tr>\n
41<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Ventilation for buildings. Measurement of air flows on site. Methods<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2015<\/td>\n44<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":273064,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[264,2641],"product_tag":[],"class_list":{"0":"post-273058","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-17-120-10","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/273058","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/273064"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=273058"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=273058"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=273058"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}