KTB Nr. 2006-35-kj-en Collector test according to EN 12975-1,2:2006
KTB Nr. 2006-35-kj-en Collector test according to EN 12975-1,2:2006 KTB Nr. 2006-35-kj-en Collector test according to EN 12975-1,2:2006
5.9 Picture and cut drawing of the collector Figure 1: Picture of the collector Collettore Solare Piano CP4M Kleber Rahmenprofil Flanschplatte Glas Absorber Isolierung Bodenblech Isolierung Figure 2: Cut drawing of the collector Collettore Solare Piano CP4M KTB Nr. 2006-35-k-j-en : Collector test according to EN 12975-1,2:2006 IMMERGAS S.p.A. , Series Collettore Solare Piano CP4M and Collettore Solare Piano CP2M 04.07.2007, Fraunhofer-ISE, Heidenhofstraße 2, D-79110 Freiburg Page 12 of 37
6 Collector efficiency parameters 6.1 Test method Outdoor, steady state according to EN 12975-2:2006 (tracker) Thermal solar systems and components-solar collectors,Part 2: Test methods 6.2 Description of the calculation The functional dependence of the collector efficiency on the meteorological and system operation values can be represented by the following mathematical equation: η (G,(tm−t a) ) = η 0 − a 1a t m − t a G − a (t m − t a ) 2 2a G (2) (based on aperture area) t m = te+t in 2 where: G = global irradiance on the collector area (W/m 2 ) t in = collector inlet temperature ( ◦ C) t e = collector outlet temperture ( ◦ C) t a = ambient temperature ( ◦ C) The coefficients η 0 , a 1a and a 2a have the following meaning: η 0 : Efficiency without heat losses, which means that the mean collector fluid temperature is equal to the ambient temperature: t m = t a The coefficients a 1a and a 2a describe the heat loss of the collector. The temperature depedency of the collector heat loss is described by: a 1a + a 2a ∗ (t m − t a ) KTB Nr. 2006-35-k-j-en : Collector test according to EN 12975-1,2:2006 IMMERGAS S.p.A. , Series Collettore Solare Piano CP4M and Collettore Solare Piano CP2M 04.07.2007, Fraunhofer-ISE, Heidenhofstraße 2, D-79110 Freiburg Page 13 of 37
- Page 1 and 2: Test Report: KTB Nr. 2006-35-k-j-en
- Page 3 and 4: 7 Incidence angle modifier IAM 17 8
- Page 5 and 6: 1 Summary 1.1 Preliminary remark Th
- Page 7 and 8: 2 Test Center Test Center for Therm
- Page 9 and 10: 5.1 Specific data of the smallest c
- Page 11: 5.5 Absorber Material of the absorb
- Page 15 and 16: 6.4 Power output per collector unit
- Page 17 and 18: The power output per collector unit
- Page 19 and 20: Example values from fitted curve: M
- Page 21 and 22: 13 External thermal shock tests Tes
- Page 23 and 24: 18 Mechanical load test 18.1 Positi
- Page 25 and 26: 20 Final inspection The following t
- Page 27 and 28: A Drawing of absorber layout Collet
- Page 29 and 30: C Drawing of absorber layout Collet
- Page 31 and 32: E Efficiency curve and measurement
- Page 33 and 34: E.3 Efficiency curve for the determ
- Page 35 and 36: G Data of the exposure test H: dail
- Page 37: Datum H gueltiger Abschnitt t a Reg
6 <strong>Collec<strong>to</strong>r</strong> effici<strong>en</strong>cy parameters<br />
6.1 Test method<br />
Outdoor, steady state <strong>according</strong> <strong>to</strong> <strong>EN</strong> <strong>12975</strong>-2:<strong>2006</strong> (tracker)<br />
Thermal solar systems and compon<strong>en</strong>ts-solar collec<strong>to</strong>rs,Part 2: Test methods<br />
6.2 Description of the calculation<br />
The functional dep<strong>en</strong>d<strong>en</strong>ce of the collec<strong>to</strong>r effici<strong>en</strong>cy on the meteorological and<br />
system operation values can be repres<strong>en</strong>ted by the following mathematical<br />
equation:<br />
η (G,(tm−t a) ) = η 0 − a 1a<br />
t m − t a<br />
G<br />
− a (t m − t a ) 2<br />
2a<br />
G<br />
(2)<br />
(based on aperture area)<br />
t m = te+t in<br />
2<br />
where: G = global irradiance on the collec<strong>to</strong>r area (W/m 2 )<br />
t in = collec<strong>to</strong>r inlet temperature ( ◦ C)<br />
t e = collec<strong>to</strong>r outlet temperture ( ◦ C)<br />
t a = ambi<strong>en</strong>t temperature ( ◦ C)<br />
The coeffici<strong>en</strong>ts η 0 , a 1a and a 2a have the following meaning:<br />
η 0 : Effici<strong>en</strong>cy without heat losses, which means that the mean collec<strong>to</strong>r<br />
fluid temperature is equal <strong>to</strong> the ambi<strong>en</strong>t temperature:<br />
t m = t a<br />
The coeffici<strong>en</strong>ts a 1a and a 2a describe the heat loss of the collec<strong>to</strong>r. The<br />
temperature deped<strong>en</strong>cy of the collec<strong>to</strong>r heat loss is described by:<br />
a 1a + a 2a ∗ (t m − t a )<br />
<strong>KTB</strong> <strong>Nr</strong>. <strong>2006</strong>-<strong>35</strong>-k-j-<strong>en</strong> : <strong>Collec<strong>to</strong>r</strong> <strong>test</strong> <strong>according</strong> <strong>to</strong> <strong>EN</strong> <strong>12975</strong>-1,2:<strong>2006</strong><br />
IMMERGAS S.p.A. , Series Collet<strong>to</strong>re Solare Piano CP4M and Collet<strong>to</strong>re Solare Piano CP2M<br />
04.07.2007, Fraunhofer-ISE, Heid<strong>en</strong>hofstraße 2, D-79110 Freiburg<br />
Page 13 of 37
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