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ASHRAE Guideline 21 2012

ASHRAE Guideline 21 2012

$29.25

IEEE/ASHRAE Guideline 21-2012 Guide for the Ventilation and Thermal Management of Batteries for Stationary Applications

Published By Publication Date Number of Pages
ASHRAE 2012 110
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This new guideline serves as a bridge between electrical designers and HVAC designers for new stationary battery installations. Ventilation of stationary battery installations is critical to maximize battery life while minimizing the hazards associated with hydrogen production. Vented lead-acid (VLA), valve-regulated lead-acid (VRLA), and nickel-cadmium (NiCd) stationary battery installations are discussed in this guide. This guide describes battery operating modes and the hazards associated with each. It provides the HVAC designer with the information to provide a cost-effective ventilation solution. The primary purpose of this guide is to assist users involved in the design and management of new stationary battery installations. The focus is the environmental design and management of the installation to maximize battery reliability as well as the safety of personnel and equipment. This guide is a joint effort by the IEEE and ASHRAE.

PDF Catalog

PDF Pages PDF Title
1 IEEE Std 1635-2012/ASHRAE Guideline 21-2012 Front cover
3 Title page
6 Notice to users
Laws and regulations
Copyrights
Updating of IEEE documents
Errata
Patents
8 Participants
11 Introduction
12 Contents
15 Important notice

1. Overview
1.1 Scope
16 1.2 Purpose
1.3 Exclusions
1.4 Document organization
17 2. Normative references
18 3. Definitions, acronyms, and abbreviations
3.1 Definitions
3.2 Acronyms and abbreviations
20 4. Battery safety hazards and considerations
5. Fundamentals
5.1 Battery types
23 5.2 Battery application
24 5.3 Installation enclosure applications
25 6. Heating, ventilation, and air conditioning
6.2 HVAC design for performance
27 6.3 HVAC design for safety
29 7. Environmental design
7.2 Operating modes
40 7.3 Heating, ventilating, and air-conditioning system design requirements
42 7.4 HVAC system design for ventilation
44 7.5 Integrated battery areas
7.6 Controls and alarms
45 7.7 Battery room hazard classification
7.8 Enclosure design applications
46 8. Economics
48 9. Environmental management (operation and maintenance)
50 Annex A (informative)
Hydrogen generation in lead-acid and nickel-cadmium batteries
A.1 Purpose
A.2 Gassing equations for lead-acid batteries
62 A.3 Sample gassing calculations for vented lead-acid batteries
64 A.4 Sample gassing calculations for lead-calcium-tin VRLA batteries
66 A.5 Sample gassing calculations for vented lead-antimony batteries
68 A.6 Battery gassing calculations for NiCd batteries
70 A.7 Sample gassing calculations for vented NiCd batteries
73 Annex B (informative)
Heat generation in lead-acid batteries
B.1 Purpose
B.2 Basics of battery heat generation
94 B.3 Sample battery heat generation calculations for vented lead-acid batteries
96 B.4 Sample heat generation calculations for lead-calcium tin VRLA batteries
98 B.5 Sample heat generation calculations for vented NiCd batteries
100 Annex C (informative)
Existing U.S. codes and standards
102 Annex D (informative)
Explosive and toxic gas allowance considerations
D.1 Permissible hydrogen concentrations
D.2 Permissible hydrogen sulfide concentrations and responsive actions
103 D.3 Permissible arsine and stibine concentrations
104 Annex E (informative)
Thermal runaway
105 E.1 Thermal runaway in NiCd batteries
106 Annex F (normative)
Hydrogen sulfide gas
107 Annex G (informative)
Bibliography

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ASHRAE Guideline 21 2012
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