SNZ PAS 5311:2021
Biomass boilers for small and medium heat loads
Objective of this publicly available specification (PAS) is to provide best practice guidance to support the adoption of low-emission biomass boiler systems in commercial, institutional, and industrial heat applications. This PAS provides advice and information on biomass boiler systems for small to medium heat loads (50 kW to 2 MW) providing hot water below 100°C. Within this document, a biomass boiler system is one fuelled by wood chip, wood briquettes, wood pellets, or other biomass. This PAS includes both technical and non-technical guidance on: evaluating heat demand and energy efficiency; generic site requirements; greenhouse gas and local particulate emissions; fuel quality, supply, reception, storage, and handling; operation and maintenance; system efficiency; seasonal efficiency; regulatory and non-regulatory health and safety aspects; and consenting.
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SNZ 5311 2021 Biomass boiler systems for small and medium heat loads
Technical advisory group representation
Acknowledgement
Copyright
CONTENTS
Referenced documents
Latest revisions
Review
Foreword
1 GENERAL
1.1 Scope
1.2 Objective
1.3 Definitions
1.4 Abbreviations
2 OVERVIEW
2.1 What is a biomass boiler system?
2.2 Where to start? Evaluation of options
2.3 Biomass fuel
2.4 Fuel quality characteristics that effect boiler performance
2.5 Fuel management and storage
2.6 Biomass boilers
2.7 Operation, maintenance, and safety
2.8 Attributes of biomass boiler systems
2.9 Scoping and conceptual assessment
2.10 Consenting
2.11 Checklist for biomass boiler systems
3 TECHNICAL SPECIFICATION
3.1 General
3.2 Biomass fuel
3.3 Chip
3.4 Hog fuel
3.5 Pellets
3.6 Briquettes
3.7 Herbaceous fuels
3.8 Specifying the right fuel
3.9 Fuel supply contracts
3.10 Fuel management and storage
3.11 Equipment selection
3.12 Capacity ratings
3.13 Operation, maintenance, and safety
3.14 Consenting, financial life cycle, and environmental and social assessment
Appendix
Appendix A – Wood fuel value by moisture content
Appendix B – Other resources
Table 1 – Fuel type features for heating systems covered by this specification
Table 2 – Fuel specifications
Table 3 – Indicative fuel densities
Table 4 – Financial example comparison
Table A1 – Indicative moisture content and energy
Figure 1 – Stoker biomass boiler system
Figure 2 – Wood chips
Figure 3 – Wood pellets
Figure 4 – Hog fuel
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Copyright in SNZ PAS 5311 is Crown copyright, administered by the New Zealand Standards Executive. Access to this standard has been sponsored by the Energy Efficiency and Conservation Authority under copyright licence LN001390. You are permitted to view and print this standard free of charge (subject to printing costs) for your own use. You are not permitted to reproduce any part of it without prior written permission from Standards New Zealand, on behalf of the New Zealand Standards Executive, unless your actions are covered by Part 3 of the Copyright Act 1994
For queries about copyright, please contact Standards New Zealand at copyright@standards.govt.nz
References
Energy Audits
Life cycle costing - An application guide
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SNZ 5311 2021 Biomass boiler systems for small and medium heat loads
Technical advisory group representation
Acknowledgement
Copyright
CONTENTS
Referenced documents
Latest revisions
Review
Foreword
1 GENERAL
1.1 Scope
1.2 Objective
1.3 Definitions
1.4 Abbreviations
2 OVERVIEW
2.1 What is a biomass boiler system?
2.2 Where to start? Evaluation of options
2.3 Biomass fuel
2.4 Fuel quality characteristics that effect boiler performance
2.5 Fuel management and storage
2.6 Biomass boilers
2.7 Operation, maintenance, and safety
2.8 Attributes of biomass boiler systems
2.9 Scoping and conceptual assessment
2.10 Consenting
2.11 Checklist for biomass boiler systems
3 TECHNICAL SPECIFICATION
3.1 General
3.2 Biomass fuel
3.3 Chip
3.4 Hog fuel
3.5 Pellets
3.6 Briquettes
3.7 Herbaceous fuels
3.8 Specifying the right fuel
3.9 Fuel supply contracts
3.10 Fuel management and storage
3.11 Equipment selection
3.12 Capacity ratings
3.13 Operation, maintenance, and safety
3.14 Consenting, financial life cycle, and environmental and social assessment
Appendix
Appendix A – Wood fuel value by moisture content
Appendix B – Other resources
Table 1 – Fuel type features for heating systems covered by this specification
Table 2 – Fuel specifications
Table 3 – Indicative fuel densities
Table 4 – Financial example comparison
Table A1 – Indicative moisture content and energy
Figure 1 – Stoker biomass boiler system
Figure 2 – Wood chips
Figure 3 – Wood pellets
Figure 4 – Hog fuel
SNZ PAS 5311:2021
Online Library subscription pricing
The cost of your subscription will depend on which standards you want to access, and how many people in your organisation need to be able to access the Online Library subscription at the same time (concurrent users). During your subscription period, we are also able to make any necessary changes and ensure you are aware of any pricing changes that result. For a quote, contact our Online Library team by emailing onlinelibrary@standards.govt.nz.