CHPQA - Quality Assurance for Combined Heat and Power

CHP Helpline 0845 365 5153

Guidance Notes

Please also see documents in the CHPQA Documents and CHPQA Forms sections. Please also read the important notes below the list of documents.

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Simple Guide

A simple guide has been produced to give an overview of CHPQA,covering the application and certification procedures and the benefits of being certified as Good Quality (GQ)CHP. This Guide also provides a list of relevant contacts, such as the Office of the Gas and Electricity Markets (Ofgem) and HM Revenue & Customs (HMRC). This guide is aimed at both existing and new applicants to the programme.

 Simple Guide to the CHP Quality Assurance (CHPQA) Programme

 

The CHPQA Guidance Notes are structured as follows:

  • GN0 to GN9 Introduction
  • GN10 to GN16 Scheme Details and Thresholds
  • GN17 to GN29 CHPQA Analysis
  • GN30 to GN39 Treatment of Special Cases
  • GN40 to GN49 Uses for CHPQA

 

  • Version Control Index

  • GUIDANCE NOTE 00: Introduction to the CHPQA Guidance Notes Information
    • Citation, Applicability & Commencement
    • Scope
    • Purpose and Aims
    • Participation in the CHPQA programme
    • Requirements for Certification
    • Procedure and Time scale
    • Certification
    • Penalties
    • Appeals
  • GUIDANCE NOTE 1: CHPQA Application for Registration (Form F1)

  • GUIDANCE NOTE 2: CHP Scheme Description (Form F2) Information
    • CHP Scheme Description (Form F2)
    • Procedure for completing Form F2
  • GUIDANCE NOTE 2s: CHP Scheme Description (Form F2(S)) Information

    A short version of Guidance Note 2 

  • GUIDANCE NOTE 3 Self-Assessment for Proposed New and Upgraded CHP Schemes (Form F3) Information

    Self-Assessment of Proposed New and Upgraded CHP Schemes (Form F3). The subsequent requirements for claiming ECAs are described in GN42.

  • GUIDANCE NOTE 3s: Self Assessment of Proposed New CHP Schemes (Form F3(S)) Information

    <span class="printversion">A short version of Guidance Note 3 </span>

  • GUIDANCE NOTE 4: Self-Assessment for Existing Schemes (Form F4) Information
    • Self-assessment for existing Schemes (Form F4) Procedure
    • Part 1 Scheme Identification and Declaration
    • Part 2 Scheme Energy Inputs and Outputs
    • Part 3 Criteria 1: Power Efficiency
    • Part 4 Criteria 2: Quality Index (QI)
    • Part 5 Calculation of CHPQPO and CHPQPC
    • Part 6 Exports of Electricity and Heat
  • GUIDANCE NOTE 4s: Self-Assessment for Existing Schemes (Form F4(S)) Information

    A short version of Guidance Note 4

  • GUIDANCE NOTE 10: Defining Good Quality CHP Information

     

    • Defining Good Quality CHP
    • Criterion for Good Quality CHP
    • QI Methodology and Treatment of Different Plant
    • The General Form
    • Quality Index Definition(s)
    • Criterion for Certification of "Good Quality"
    • CHP Qualifying Fuel Input (CHPQFI)
    • CHP Qualifying Power Output (CHPQPO)
    • CHP Qualifying Power Capacity (CHPQPC)
    • Future Criterion for Good Quality CHP
    • Special Cases
    • Initial Operation (IO)
    • Residential Community Heating (RCH)

     

  • GUIDANCE NOTE 11: CHP Scheme Definition Information
    • CHP Scheme Definition
    • Utilities Area
    • Process Area
    • CHP Scheme Boundary
  • GUIDANCE NOTE 12: CHP Scheme Description Information
    • CHP Scheme Description
    • Economic Sector
    • CHP Scheme Line Diagram
    • CHP Scheme Energy Flow Diagram
    • Heat Profiles
    • CHP Scheme Equipment
    • CHP Scheme Monitoring Equipment Arrangements
    • CHP Scheme Capacity
    • Additional Equipment
    • Selection of QI Definition(s)
  • GUIDANCE NOTE 13: CHP Scheme Monitoring Information
    • CHP Scheme Monitoring
    • Schemes Below 2MWe with No Heat Rejection Facility
    • Schemes Below 2MWe with Heat Rejection Facility
    • Schemes over 2MWe
    • Metering Requirements
    • Uncertainty
  • GUIDANCE NOTE 14: CHP Scheme Energy Inputs Information
    • CHP Scheme Energy Inputs
    • Fuel Inputs
    • Conventional Fuels
    • Alternative Fuels
    • Metering Requirements
    • Uncertainties
    • CHP Total Fuel Input (CHPTFI)
  • GUIDANCE NOTE 15: CHP Scheme Power Outputs Information
    • CHP Scheme Power Outputs
    • Total Power Output and Total Power Capacity
    • Mechanical Power Outputs
    • Metering Requirements
    • Exported Power
  • GUIDANCE NOTE 16: CHP Scheme Heat Outputs Information
    • CHP Scheme Power Outputs
    • Total Power Output and Total Power Capacity
    • Mechanical Power Outputs
    • Metering Requirements
    • Exported Power
  • GUIDANCE NOTE 17: Uncertainty in Metered Inputs and Outputs

  • GUIDANCE NOTE 18: Uncertainty in Calculated Energy Inputs and Outputs

  • GUIDANCE NOTE 19: Adjustment of Energy Inputs and Outputs for Excessive Uncertainty

  • GUIDANCE NOTE 20: Indirect Determination of Energy Inputs Information
    • Indirect Determination of Energy Inputs
    • Problematic Energy Inputs
    • The Losses Method
    • Energy Balance Models
    • Uncertainties
  • GUIDANCE NOTE 21: Indirect Determination of Heat Outputs Information
    • Indirect Determination of Energy Outputs (Heat)
    • Hot Water and Thermal Fluid Systems
    • Direct Use of Exhaust Gases
    • Multi-pressure Steam Systems
  • GUIDANCE NOTE 22: Indirect Determination of Mechanical Power Outputs Information
    • Indirect Determination of Energy Outputs (Mechanical Power)
    • Main Prime Movers
    • Secondary Steam Turbines
  • GUIDANCE NOTE 23: Correction of Bias in Inputs and Outputs Information
    • Determination of Uncertainties of in Inputs and Outputs
    • Uncertainties (Errors)
    • Calculation of Uncertainty
  • GUIDANCE NOTE 24: Determination of Scheme Quality Information
    • Determination Scheme Quality
    • Quality Index
    • Calculation of CHP Scheme Efficiency
    • Power Efficiency Threshold
    • Calculating the QI Definition
    • Calculation of the Quality Index
    • Quality Index Threshold
  • GUIDANCE NOTE 25: Determination of CHP Qualifying Fuel Input Information
    • Determination of CHP Qualifying Fuel Input
    • Qualifying Fuel Input (CHPQFI)
    • Calculating Qualifying Fuel Input
  • GUIDANCE NOTE 26: Determination of CHP Qualifying Power Output Information
    • Determination of CHP Qualifying Power Output
    • Qualifying Power Output (CHPQPO)
    • Calculating Qualifying Power Output
  • GUIDANCE NOTE 27: Determination of CHP Qualifying Power Capacity Information
    • Determination of CHP Qualifying Power Capacity
    • Qualifying Power Capacity (CHPQPC)
    • Calculating QI(MaxHeat)
    • Calculating Qualifying Power Capacity
  • GUIDANCE NOTE 28: The Determination of Z Ratio Information
    • The Determination of Z-Ratio
    • Definition and Use of Z-Ratio
    • Determination of Z-Ratio
  • GUIDANCE NOTE 29: Alternative Fuels - Energy Inputs
  • GUIDANCE NOTE 30: CHP Serving Community Heating Information
    • CHP Serving Community Heating
    • Residential Community Heating
    • Non-residential Community Heating
  • GUIDANCE NOTE 31: CHP Schemes Less Than 2MWe

  • GUIDANCE NOTE 41: Use of CHPQA to Obtain CCL Exemption Information
    • Use of CHPQA to obtain CCL Exemption
    • Please contact HM Revenue & Customs (telephone 0845 010 9000) for any queries on the use of CHPQA to obtain CCL Exemption
    • For queries associated with the Secretary of States (exemption) Certificate, please go to the CHPQA Certificates page on this site
  • GUIDANCE NOTE 42: Use of CHPQA to Obtain Enhanced Capital Allowances

  • GUIDANCE NOTE 43: Use of CHPQA to Obtain Exemption from Business Rating of CHP Plant and Machinery

  • GUIDANCE NOTE 44: Use Of CHPQA To Obtain Support For Electrical Output From Renewable CHP Under The Renewables Obligation
  • Appendix 1: Example 1 - a Simple Small-Scale chpScheme Information
    • Completing Form F2 (GN2)
    • Completing Form F4 (GN4)
  • Appendix 2: Example 2 - a CCGT Scheme with Mixed Fuels Information
    • Completing Form F2 (GN2)
    • Completing Form F4 (GN4)
  • Appendix 3: Example 3 - Determination of Useful Heat Output by Direct Use of Gas Turbine (or Engine) Exhaust Gases

  • Appendix 4: Example 4 - Determination of Z-Ratio by Plant Performance Test

  • Generic Scheme Energy Flow Diagrams

  • Summary of Standards

  • Glossary

 

CHPQA CHP Unit List (Specs' for CHP's <500KWe)

IMPORTANT

These Guidance Notes are comprehensive and cover a wide variety of CHP Schemes. Not all Guidance Notes are applicable to every CHP Scheme.

  • Read guidance set out in GN2 before completing Form F2
  • Read guidance set out in GN4 before completing Form F4
  • Refer to GN31 and Guidance Notes for Forms F2 and F4 (short) for simplified arrangements for CHP Schemes <2MWe
  • Appendices 1 and 2 show how the Forms can be completed for small scale and large scale CHP Schemes
  • Registration and Certification under CHPQA is available to CHP Schemes in the whole of the United Kingdom (UK) of Great Britain and Northern Ireland or owned by companies registered here. In addition, overseas CHP schemes that wish to export electricity from Good Quality CHP into the UK may also apply.
  • The Guidance Notes should be read in conjunction with the CHPQA Standard (also downloadable from this website), which sets out definitions, criteria and methodologies for the operation of CHPQA. The Guidance Notes provide detailed information on how the Standard will be interpreted by Government Departments and Agencies as well as guidance on compliance with the Standard. A number of worked examples are also included.
  • The purpose of the Guidance Notes is to help and guide applicants in completing the required forms and in carrying out Self-assessment of their CHP Schemes. They may be updated from time to time and the latest version of each Note and Form will be held on this website.
  • Whilst this document includes issues relating to the use of CHPQA for determining eligibility for fiscal benefits, where further clarification is required, reference should be made to the appropriate Government Department.

CHPQA Helpline

01235 75 3004

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