Discover everything you need to know in order to spec CHP to meet the requirements of the Combined Heat and Power Quality Assurance (CHPQA) standard.
CHPQA is an initiative that enables CHP schemes to qualify as ‘Good Quality’, enabling the client to enjoy a great deal of additional benefits from their CHP system. Here we cover the principles of the standard, why CHPQA is important, how to ensure that the scheme complies with the standard and how to get help with the necessary paperwork.
Principles of CHPQA
“CHPQA is an initiative by the Government to encourage the wider practical application of Good Quality Combined Heat and Power, Community Heating and Alternative Fuel technologies. CHPQA aims to monitor, assess and improve the quality of UK Combined Heat and Power”
In practical terms, CHPQA requires that the relevant CHP scheme provides evidence that it will operate more efficiently in terms of both power and heat delivery than the 'non-CHP' alternative. There is an annual cycle of re-assessment designed to demonstrate that the scheme continues to deliver its benefits.
Importance of CHPQA
The economic payback of a CHP scheme will depend on a combination of energy, heat and carbon savings, together with financial incentives through various Government initiatives. Such incentives largely rely on the scheme achieving, and maintaining, the CHPQA standard. These initiatives include:
- Exemption from the Climate Change Levy (CCL) of all fuel inputs to Good Quality CHP and electricity outputs consumed onsite or supplied direct to a third known party.
- Eligibility for Enhanced Capital Allowances (ECA) for Good Quality CHP plant and machinery.
- Extension of the eligibility for Renewables Obligation Certificates (ROCs) for Good Quality CHP, using specified primary fuels.
Ensuring your scheme complies
If your proposed CHP scheme is from an established supplier and with a relatively standard technology and specification, the chances are it has already been designed to meet the CHPQA standard. If the technology is more innovative and the specification less standard, then compliance may not be a given.
In either case, it is important to run through the calculation using the design figures for fuel inputs and power and heat outputs to be satisfied that the CHP standard is going to be achieved, and maintained.
If the figures don't achieve the standard, or are marginal at this stage, it could be time for a re-design – for the fastest possible return on investment it makes sense to gain access to the widest range of incentives for CHP.
Doing the paperwork
There is more detailed information available to help consultants and clients understand compliance with the standard: firstly the Simple Guide, then full details of calculations in the CHPQA Standard.
In simple terms, the forms needed to comply with CHPQA requirements are summarised as:
F1 - to register scheme and contact details
F2 - to enter scheme description
F3 - to enter predicted performance for new/upgraded schemes
F4 - to enter actual performance data for previous calendar year
- There is value in addressing these issues at the earliest/design stage as problems with meeting the CHPQA standard are highly likely to compromise overall CHP scheme economics.
- Read the documents above to get an adequate understanding of the CHPQA standard. This is probably necessary for both the consultant and the client.
- Calculate, using the predicted performance data, to ensure your scheme will meet the standard.
- Finalise the design specification of your CHP scheme - will the supplier guarantee performance to achieve the CHPQA standard?
- Develop the procedures to continually monitor performance data in order to be fully prepared for the annual re-assessment.