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AS/NZS 2535.1:2007
[Current]Test methods for solar collectors, Part 1: Thermal performance of glazed liquid heating collectors including pressure drop (ISO 9806-1:1994, MOD)
Establishes methods for determining the thermal performance of glazed liquid heating solar collectors. It provides test methods and calculation procedures for determining the steady-state and quasi-steady-state thermal performance of solar collectors. The Standard is technically equivalent to and has been reproduced from ISO 9806-1:1994.
Published: 07/03/2007
Pages: 72
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
1 Scope
1.1
1.2
1.3
1.4
2 Normative references
3 Definitions
4 Symbols and units
5 Collector mounting and location
5.1 General
5.2 Collector mounting frame
5.3 Tilt angle
5.4 Collector orientation
5.5 Shading from direct solar irradiance
5.6 Diffuse and reflected solar irradiance
5.7 Thermal irradiance
5.8 Wind
6 Instrumentation
6.1 Solar radiation measurement
6.1.1 Pyranometer
6.1.1.1 Precautions for effects of temperature gradient
6.1.1.2 Precautions for effects of humidity and moisture
6.1.1.3 Precautions for infrared radiation effects on pyranometer accuracy
6.1.1.4 Mounting of pyranometers outdoors
6.1.1.5 Use of pyranometers in solar irradiance simulators
6.1.1.6 Calibration interval
6.1.2 Measurement of the angle of incidence of direct solar radiation
6.2 Thermal radiation measurement
6.2.1 Measurement of thermal irradiance outdoors
6.2.2 Determination of thermal irradiance indoors and in solar simulators
6.2.2.1 Measurement
6.2.2.2 Calculation
6.3 Temperature measurements
6.3.1 Measurement of heat transfer fluid inlet temperature (tin)
6.3.1.1 Required accuracy
6.3.1.2 Mounting of sensors
6.3.2 Determination of heat transfer fluid temperature difference(ΔT)
6.3.3 Measurement of surrounding air temperature (ta)
6.3.3.1 Required accuracy
6.3.3.2 Mounting of sensors
6.4 Measurement of collector liquid flowrate
6.5 Wind velocity
6.5.1 Required accuracy
6.5.2 Mounting of sensors
6.5.3 Calibration
6.6 Pressure measurements
6.7 Elapsed time
6.8 Instrumentation/data recorders
6.9 Collector area
6.10 Collector fluid capacity
7 Test installation
7.1 General consideration
7.2 Heat transfer fluid The
7.3 Pipework and fittings
7.4 Pump and flow control devices
7.5 Temperature regulation of the heat transfer fluid
8 Outdoor steady-state efficiency test
8.1 Test installation
8.2 Preconditioning of the collector
8.3 Test conditions
8.4 Test procedure
8.5 Measurements
8.6 Test period (steady-state)
8.7 Presentation of results
8.8 Computation of collector efficiency
8.8.1 Solar energy intercepted by the collector
8.8.2 Reduced temperature difference
8.8.3 Graphical presentation of instantaneous efficiency
8.8.3.1 Instantaneous efficiency based on gross collector area
8.8.3.2 Instantaneous efficiency based on absorber area
8.8.4 Conversion of thermal performance test characteristics
9 Steady-state efficiency test using a solar irradiance simulator
9.1 General
9.2 The solar irradiance simulator for steady-state efficiency testing
9.3 Test installation
9.4 Preconditioning of the collector
9.5 Test procedure
9.6 Measurements during tests in solar irradiance simulators
9.6.1 Measurement of simulated solar irradiance
9.6.2 Measurement of thermal irradiance in simulators
9.6.3 Ambient air temperature in simulators
9.7 Test period
9.8 Test conditions
9.9 Computation and presentation of results
10 Determination of the effective thermal capacity and the time constant of a collector
10.1 General
10.2 Determination of thermal capacity
10.3 Test procedure for collector time constant
10.4 Calculation of collector time constant
11 Collector incident angle modifier
11.1 General
11.2 Solar irradiance simulator for the measurement of incident angle modifiers
11.3 Test procedures
11.3.1 Method 1
11.3.2 Method 2
11.4 Calculation of collector incident angle modifier
12 Determination of the pressure drop across a collector
12.1 General
12.2 Test installation
12.3 Preconditioning of the collector
12.4 Test procedure
12.5 Measurements
12.6 Pressure drop caused by fittings
12.7 Test conditions
12.8 Calculation and presentation of results
Annex A
A.1
Annex B
B.1 General
B.1.1 Basic equations using collector mean temperature
B.1.2 Basic equations using collector inlet temperature
B.1.3 Thermal performance test data conversion
B.2 Collector time constant
B.3 Diffuse irradiance
B.4 Effects of angle of incidence
B.5 Equivalent normal solar irradiance
B.6 Wind effects
Annex C
Annex D
Annex E
E.1 Test installation
E.2 Indoor test procedure
E.2.1 Measurements
E.2.2 Calculation of effective thermal capacity
E.2.3 Determination of effective thermal capacity from experimental data
E.3 Outdoor or solar irradiance simulator test procedure
Annex F
Annex G
Annex ZA
Annex ZB
ZB1 Reduced temperature difference conditions during testing
ZB2 Ambient temperature during simulator testing
Annex ZC
ZC1 Reduced temperature difference
ZC2 Instantaneous efficiency equation
ZC3 Correction for the effects of different heat-transfer fluids
ZC4 Effects of mass flow rate
Annex ZD
ZD1 Scope
ZD2 Calculations
ZD3 Choice of collector thermal constants
Annex ZE
Annex ZF
Amendment control sheet
AS/NZS 2535.1:2007
Amendment No. 1 (2014)
Revised text
Cited references in this standard
Content history
[Current]
[Superseded]
[Superseded]
AS/NZS 2535.1:2007 REC:2020
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