report from iso 9806:2017 the new collector standard · report from iso 9806:2017 the new collector...

Report from ISO 9806:2017

The new collector standard

ESTESC Webinar

27.03.2017

Dr. A. Bohren, SPF Testing

Convenor CEN/TC 312/WG1

Introduction

ESTESC Webinar, ISO 9806, 27.03.17

A. Bohren

2

ISO 9806: How to test Solar thermal collectors.

No requirements, no pass/fail

Standard is adopted in many countries as national standard:

DIN EN ISO 9806, ÖNORM EN ISO 9806 etc.

Other standards/certification schemes are referring to the ISO 9806:

EN12975, SRCC OG-100, AS/NZS 2712 etc.

Currenty valid edition ISO 9806:2013

Revision under the «Vienna Agreement»,

-> Revision of ISO standard under lead of CEN/TC 312/WG1.

Convenor: A. Bohren (presenter)

What’s new?

Scope of the standard ?


A. Bohren

3

Solar Thermal is much more than

«Evacuated Tube Collectors» and «Flat Plate Collectors»

Open the scope: Include «all» Sun2Heat


A. Bohren

4

Tracking collectors

- Require energy to operate

- Not stagnation safe

- Self protecting

Cogenerators of Heat and

Electricity (e.g. PVT)



A. Bohren

5

Façade Elements / Solar activated Building Shell, «unglazed» collectors,

Low temperature systems, Swimming pool collectors, Condensing

collectors, etc….

All that is Sun2Heat.



A. Bohren

6

+ Temperature range +

Process heat

In-situ testing

Overlap with Standards

IEC TC 117 : SOLAR THERMAL ELECTRIC PLANTS

NEW: Collectors with specific attributes


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7

Adapted test procedures for 5 categories

Collectors using external power sources for normal operation

Collectors with active or passive measures for self-protection

Collectors co-generating thermal and electrical power

Wind and/or infrared sensitive collectors (WISC) (*)

Façade collectors

* WISC:

Replacing: unglazed Collectors, uncovered Collectors, non covered Collectors,

Swimming pool Collectors, etc.

These are all deleted from the standard and not existing anymore.

NEW: Performance -> One representation for all


A. Bohren

8

Presentation of performance results is independent of

Flat plate, Evacuated tube collectors, Steady-State, Quasi-Dynamic,

Unglazed, Parabolic Trough, PVT, Switching collectors, Air Collectors,

Liquid Heating, WISC, etc.: Total of 31 Parameters is required.

All other terms already there from

steady state and quasi dynamic

Reduced temperature difference Tm*

is not existing anymore

48

4765

44

32

2100

amaLmaL

amamamddb,bTLbb,G

aTE'uaG'uadtdaTEa

'uaaaGKG,KAQ

From IEC

TC 117



A. Bohren

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Presentation of performance results is independent of

Flat plate, Evacuated tube collectors, Steady-State, Quasi-Dynamic,

Unglazed, Parabolic Trough, PVT, Switching collectors, Air Collectors,

Liquid Heating, WISC, etc.: Total of 31 Parameters is required.

48

4765

44

32

2100

amaLmaL

amamamddb,bTLbb,G

aTE'uaG'uadtdaTEa

'uaaaGKG,KAQ

Θ 0 10 20 30 40 50 60 70 80 90

Kb(θL,0)

Kb(0,θT)

AG η0b Κd a1 a2 a3 a4 a5 a6 a7 a8

m2 -- -- W/m2K W/m2K2 J/m3K -- J/m2K s/m W/m2K4 W/m2K4



A. Bohren

10

Full backward compatibility. Old results can be used. Full comparability

Some parameters will usually be set to zero.

48

4765

44

32

2100

amaLmaL

amamamddb,bTLbb,G

aTE'uaG'uadtdaTEa

'uaaaGKG,KAQ

Θ 0 10 20 30 40 50 60 70 80 90

Kb(θL,0)

Kb(0,θT)

AG η0b Κd a1 a2 a3 a4 a5 a6 a7 a8

m2 -- -- W/m2K W/m2K2 J/m3K -- J/m2K s/m W/m2K4 W/m2K4

NEW: Standard Reporting Conditions SRC


A. Bohren

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Standard reporting conditions (SRC)

All test reports provide the same information in the same format

independent of the collector type for

- Thermal performance

- Incidence angle modifier.

Big advantage for marketing, software, subsidies, new technologies

Climate Classes for testing (Exposure, thermal shocks)


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12

Climate Class

C

«Temperate»

Tamb=10°C

G=800 W/m2

Climate Class

B

«Sunny»

Tamb=15°C

G=900 W/m2

Climate Class

A

«Very Sunny»

Tamb=20°C

G=1000 W/m2

Kangerlussuaq

? ?

Very Mild

summer in

Central Europe

Climate Classes in the last version ISO9806:2013

Climate Classes for testing (Exposure, thermal shocks)


A. Bohren

13

Climate Class

B

«Sunny»

T=15°C

G=900 W/m2

Climate Class

A

«Very Sunny»

T=20°C

G=1000 W/m2

A+

«Extremely

Sunny»

T=40°C

G=1100 W/m2

?

Very Mild

summer in

Central Europe

Mediterranean

Australia

etc.

Climate Classes in the new version ISO9806:2017

But now 3 equivalent methods for faster testing.

Improved: Better description of mechanical load test


A. Bohren

14

1 Collector

2 Attachment points. Relevant for the test result

3 Mounting Hardware to be used for testing.

Attached to the test rig, but not relevant for the test result

4 Stand (not tested)

5 Roof hooks (not tested)

Reduce Text Book, etc..

Editorial, Orthographic, References

Tidy up, rearrange, remove double/triple information, delete nonsense, …

Final inspection: Rating revised and improved

Description of incidence angle modifier tests and models modified

Test sequence offers more flexibility,

…

Further Improvements


A. Bohren

15

Further News


A. Bohren

16

Heat pipe freeze resistance (US, Solar Keymark)

Methods for self-protecting collectors, Methods for collectors using

external power (trackers, motors, pumps, etc.)

Specific aspects of façade collectors

(Part of the exposure test must be vertical).

Material aspects (Informative annex)

Standard is harmonized with IEC TC 117 (mainly parabolic trough

collectors). IEC TC117 will reduce their own standardisation project, but

refer to the new ISO 9806 for performance testing.

…

Consequences & Hopes


A. Bohren

17

Standard is more open to new technologies.

Hope: New concepts.

Hope: No discrimination of technologies

More flexibility for faster testing

Hope: Reduce testing time

Better description of test procedures:

Hope: Less discussions and less “bad” testing

Uniform representation of all performance results

Full comparability of performance results

Hope: Stop discussions about test methods.

Hope: Better comparability of performance results

Hope: Focus on performance and not on m2

Drawbacks


A. Bohren

18

Simulation Softwares must be adapted

Test labs have to adjust some processes and tools.

Subsidy schemes and other official regulations must be adapted

Outlook


A. Bohren

19

Standard is currently at CEN/ISO and should be circulated very soon for

Final Voting

EXPECTED ISO9806:2017

THANKS TO ALL WHO CONTRIBUTED

Questions?

[email protected]

report from iso 9806:2017 the new collector standard · report from iso 9806:2017 the new collector...

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