Long time durability tests of fabric inlet stratification pipes
E. Andersen* and S. Furbo Department of Civil Engineering, Technical University of Denmark, Brovej, Building 118, DK-2800 Kgs. Lyngby * Corresponding Author, 5an@byg. dtu. dk Abstract The long time durability …
Evaluation of Optical Properties
For each exposed sample a transmission spectrum was measured; in the beginning utilizing a manually operated Zeiss-Spectrometer and since 1995 with computerized Fourier Transform Spectrometers (Bruker, IFS 66), all equipped …
Situation of European standards and quality assurance today
Table 1 gives an overview over the important currently valid European and International Standards which should ensure the quality of solar thermal collectors and PV-modules articulated in application area, standard …
Horizontal fin ray trace analysis
Ray tracing analysis for the horizontal fin is shown in Fig. 10. In Fig. 11 the optical efficiency plot for the horizontal fin ICPC shows an unbalanced curve skewed to …
The building water supply design projects
The majority of the domestic water supply projects developed until now is based on very simply Domestic Hot Water (DHW) systems like electrically heated storage cylinder and gas or oil …
Results — Performance Matrix
The result of the comparison of the failure detection methods against the criteria described in §2.4 is presented in table 4.1. The performance matrix shows the performance of the failure …
Comparison between Steady State and Quasi-dynamic test method. according to EN 12975 — application to flat plate collectors
Jose Afonso1, Nuno Mexa1, Maria Joao Carvalho ^ 1 INETI, Department of Renewable Energies, Campus do Lumiar do INETI, 1649-038 Lisbon, Portugal* Corresponding Author, mioaoa. carvalho@ineti. pt Abstract Presently two …
Weather data
TRNSYS type 15-2 with weather data generated with Meteonorm 5.0 is used in the calculations. The weather data created with Meteonorm has been compared with reference years created based on …
Development of Test Facilities for Solar Thermal Collectors and Systems
D. Bestenlehner[7], H. Widlroither[8], H. Drtick1, S. Fischer1, H. Mtiller-Steinhagen1 1Solar- und Warmetechnik Stuttgart (SWT) Pfaffenwaldring 6, 70550 Stuttgart, GermanyTel.: +49711 / 685-60155, Fax: +49711 / 685-63242Email: bestenlehner@swt-technologie. de; drueck@swt-technologie. …
Emulated water supply mains
The energy balance of the storage tank is drawn a number of times within the course of the efficiency test of SDHW systems. This is achieved by means of highly …
Classification of thermal solar systems
As can be seen from the title of the standards, the thermal solar systems have been divided into two groups: “factory made systems” and “custom built systems”. This division was …
Experimental setup
The experiments are carried out in a domestic hot water tank and a space heating tank. Both tanks are of steel and have a volume of 400 litres with an …
PET and PVC
The PET samples became brittle and degenerated already after 10 years of exposure. In the case of PVC high losses in transmittance were observed, but mechanical destruction occurred only after …
Normative requirements of „Impact Resistance Tests“
Table 2 shows a comparison of the present requirements of the methods of impact resistance tests of the transparent cover of solar thermal collectors and pv-modules which directly influence the …
Reflectivity Measurement
The device shown in Fig. 15 consists of a laser and detector mounted on a support structure that can be positioned to measure reflectance of mirror surface samples from the …
The building design project documents and organization
It would be important to ensure that the homeowner or the condominium could have an operating and instructions manual, identifying equipment schemes, safety procedures, conservations and maintenance information about the …
Conclusion, discussion and outlook
An overview of methods for monitoring and failure detection has been presented in this paper. Several differences are highlighted by means of a partial multi-criteria analysis. The results are presented …
Steady State (SS) versus Quasi-dynamic (QD) test methodology
1.2. Testing limits for both test methodologies For determination of thermal performance of solar collectors, measurement of the environmental and of working conditions relevant for the collector behaviour is needed. …
Strip angle and strip width
Calculations are carried out with different strip angles for the curved absorbers and different strip widths for the flat absorbers. The interval for the strip angle investigated is from 150° …
The all-in-one test facility
The requirements for performance testing of solar collectors and thermal solar systems are different. Therefore, it is common practice to use specifically designed test facilities for testing these two categories …
Ambient air temperature
For the testing of heat storages the ambient air temperature needs to be kept at a certain level. This is achieved by climatisation of the testing laboratory. By means of …
Solar collectors — EN 12975 Part 1 and 2
With regard to the standard series EN 12975 for solar thermal collectors, a major change undertaken during this revision process was e. g. the presentation of the thermal performance by …
Quality Control of Concentrating Collector Components for the Optimization of Performance
W. J. Platzer, A. Heimsath, C. Hildebrandt, A. Georg, G. Morin Fraunhofer Institute for Solar Energy Systems, Heidenhofstr. 2, 79110 Freiburg, GermanyCorresponding Author, werner. platzer@fse. fraunhofer. de Abstract In order …
Thermal Performance Measurements on CPC Collectors
S. Fischer* and H. Mdller-Steinhagen University of Stuttgart, Institute for Thermodynamics and Thermal Engineering (ITW), Pfaffenwaldring 6, 70550 Stuttgart, Germany * Corresponding Author, fischer@itw. uni-stuttgart. de Abstract This paper presents …
Assessment of the normative requirements
It is obvious that the diameter of hailstones is a good indicator for the damage potential of solar energy systems caused by hailstones. As shown in table 2, the standards …
Study and Application of the Automation System Based on Labview. for Domestic Solar Water Heating Test System
Xing Li1,2, Zhifeng Wang1 , Xiao Han2 1 Institute of Electrical Engineering, Chinese Academy of Sciences Beijing 100080, P. R.CHINA2 Himin Solar Energy Group Co.,Ltd, Dezhou, Shangdong 253090, P. R.CHINACorresponding …
The cases of not obligatory implementation of solar collectors
In buildings placed on historical zones is not obligatory to install solar collectors if the south- oriented roof area available is going to create a negative visual impact. As we …
Solar thermal collector yield — experimental validation of calculations. based on steady-state and quasi-dynamic test methodologies
P. Horta[13]* , M. J. Carvalho1 and S. Fischer[14] 1 INETI, Department of Renewable Energies, Campus do Lumiar do INETI, 1649-038 Lisbon, Portugal2 Institute for Thermodynamics and Thermal Engineering (ITW) …
Characteristic heat balance equations
In a solar thermal collector the heat balance can be written according to the following equation: C — d t (1) T represents the collector temperature and C …
Transmittance-absorptance product
The transmittance-absorptance product describes the properties of the glass and the absorber. The products are for all four solar collectors varied in the interval from 0.77 to 0.90. As expected …
System tests according to ISO 9459-2 and ISO 9459-5
In part two and five of the standard series ISO 9459, two possibilities for performance testing of domestic solar thermal hot water systems are described. With the CSTG (Complete System …
CORRESPONDENCE BETWEEN TECHNOLOGICAL. SOLUTIONS AND THE ENERGY LABEL OF RESIDENTIAL. BUILDINGS IN PORTUGAL
Sebastiao Carvalho, Vftor Leal and E. Oliveira Fernandes FEUP - Faculty of Engineering of the University of PortoRua Dr. Roberto Frias, s/n 4200-465 Porto PORTUGAL* Corresponding Author: Vitor Leal, vleal@fe. …
Factory made systems — EN 12976 Part 1 and 2
The standard series EN 12976 for factory made systems was changed e. g. with regard to the requirements concerning the suitability for drinking water according to EN 1717 (protection against …
Quality Assessment for Concentrating Collectors
The solar field within a solar power plant has to be optimized in several aspects. First optical and thermal design is necessary to develop technical solutions with large efficiency. Secondly …
General difficulty
The thermal performance of concentrating collectors depends strongly on the concentration ratio C. The concentration ratio for collectors having tubular absorbers is calculated by the ratio between aperture area and …
