Overview of different standards for measuring and calculating SPF – How far apart are we really?

Roger NordmanSP Technical Research Institute of Sweden

SEERASHRAE

206

SCOPEN14511/EN14825/EN16147

APFJIS C 9612

Understanding of comparable HP systems’ performance

SWOT: EN 14511IN

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The standard covers not only capacity measurement but also safety in operation

Different temperature levels on sink side provided

Capacity controlled heat pumps are not covered

Nominal capacity of capacity controlled HPs is not clearly defined

Circulation pumps are included in the testing procedure

Broadly accepted and used also as a basis for quality assurance schemes (e.g. EHPA, ErP)

Broadly accepted for different funding programs in Europe

Might change to an ISO standard

Large effort to modify and adapt because referenced within a variety of other standards

HARMFULTo achieving the objectives

HARMFULTo achieving the objectives

HELPFULTo achieving the objectives

HELPFULTo achieving the objectives

SWOT: EN 14825IN

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Different climatic conditions (3) are considered

Different temperature levels on the sink side are accounted for in heating mode and source temperatures on the source side, respectively

Transparent calculation method Auxiliary el. heating included

Mandatory test points are not clearly defined

Missing default values for auxiliary operating hours and power

Not clear how to apply Only for heating applications

Basis for the calculation of ErP Continuous improvement by the CEN

Committee International standard In-line with a number of other EN

standards such as EN 14511, EN 12309

Might be misleadingly applied

HARMFULTo achieving the objectives

HARMFULTo achieving the objectives

HELPFULTo achieving the objectives

HELPFULTo achieving the objectives

Standard 206-2013 -- Method of Testing for Rating of Multipurpose Heat Pumps for Residential Space Conditioning and Water Heating (ANSI Approved)

Task 3 & 6 Deliverable –Approach

Wayne Reedy chaired the committee and Bill Craddick acted as secretary.

Standard 206 Is an extension of and consistent with:ANSI/ASHRAE Standard 37ANSI/ASHRAE Standard 116 AHRI Standard 210/240 ANSI/AHRI/ASHRAE ISO Standard 13256-1AHRI Standard 870ANSI/ASHRAE Standard 118.2

Standard 206 replaced:ANSI/ASHRAE Standard 137and various waivers from DOEs Central Air Conditioner and Central Air Conditioning Heat Pump Test Procedure

Status Task 3 & 6 Deliverable –Approach, cont’d.

Standard 206 addresses air-source, water-source, ground water-source, ground-source closed loop, and direct geoexchange units for single-capacity, dual-capacity, and variable-capacity equipment.

Provides for up to 7 modes of equipment operationSpace conditioning onlyDedicated water heatingDehumidification+space conditioningDehumidificationSpace conditioning+water heatingDehumidification+space conditioning+water heatingDehumidification+water heating

Status Task 3 & 6 Deliverable –Approach, cont’d.

The standard method of test supports metrics for integrated appliances that allow easy comparison to metrics for individual appliances:

For Air Source Equipment:

SEERca; HSPFca; EFca

For Ground or Water Source Equipment:

EERca; COPca; EFca

“ca” = combined appliance, referring to values for the integrated appliance, rather than the comparable metric for a standard appliance

Status Task 3 & 6 Deliverable• Draft test standard completed and approved for public review by the

committee in December, 2012

• ASHRAE approved release for public review in January, 2013.

– Annex 39 members provided links to download copy of draft standard

• Review Period: 3/15 - 4/29/2013

– No comments received

– ASHRAE prepared Standard 206 for official release later 2013, nosw released!

Status Task 3 & 6 Deliverable – Standard 206 Next Steps and Future Plans

The ASHRAE committee is required to respond to every comment submitted during the public review period. In this case since no comments were received the draft standard is now being processed by ASHRAE for publication.

Efforts will then be made to engage and collaborate with AHRI to generate a rating standard for multifunction (or integrated) heat pump systems based on the test standard.

Harmonisation or local initiatives?

The work in annex 39 have showed that:• The difference in test points in different regions doesn’t differ a lot, but

timing between revisions is a threshold to harmonisation

• Harmonisation could instead happen on ISO level,

• Harmonisation could be made on test points, but there must me room for local variations, especially regarding climatic conditions and building demand profiles.

THANK YOU!WHO WILL HAVE THE FIRST QUESTION?