ā Evacuated Solar Energy Collector Technical Reference

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Even though the condenser valve assembly cuts of at 85 °C or 130 °C, heat transfer occurs via the metal assembly and a maximum stagnation temperature of approximately 155 °C (�310 °F) can be reached by both types. Table 2 summarizes some of the recom- � mended applications of the THERMOMAX � MEMOTRON Evacuated Heat-Pipe Tubes. 9 Tube recommended for … Performance TMO 500 S TMO 600 S Domestic and industrial hot water � � Swimming Pool � Space Heating � � A ir C onditioning � Sea Water Desalination � Pow er ranking machines for irrigation purposes � Industrial process heat � Table 2
(5.0) How to design a THERMOMAX � system The first step to ensure enjoyment of � � your THERMOMAX MEMOTRON Evacuated Heat-Pipe System over a long period of time is to design and specify the collector size and the associated components correctly. The following explanations are for installations up to 9 m² (90 tubes) of collector area. Some typical examples for the various components are given at the end of this chapter. (5.1) Collector Area If you are using the installation to provide hot water only it is strongly recommended to aim for 100% solar coverage during the summer months only. If the system has to provide additional energy for heating sy stems in the winter time or other applications an option for re-routing the excess heat has to be installed (i.e. heat-sink, connecting to a swimming pool) to avoid long stagnation times in the summer. Figure 8 shows the solar contribution of a correctly sized solar system over the year. Solar Contribution [ %] 100 80 60 40 20 0 J F M A M J J A S O N D Figure 8 - As a guide you can assume that 1 tube can produce maximum 10 litres of hot water, e.g. your hot water consumption is 200 l per day, a 20 tube manifold system would give you an approximate 60% solar contribution over the year in Middle European climates. - Using equation 5.1, a more accurate estimation of the overall system contribution per square meter can be made. For some cities the average daily global solar radiation per month is given in appendix 1. SC � R �� (5.1) 100 80 60 40 20 0 Solar Contribution [% ] 10 Collector Area Flow rate [m²] [l/min] 2 2.0 – 5.0 3 3.0 – 7.5 4 4.0 – 10.0 5 5.0 – 12.5 6 6.0 – 15.0 7 7.0 – 17.5 8 8.0 – 20.0 9 9.0 – 22.5 Table 3 Sy stem design with … SC … System Contribution [kWh/m²] R … Monthly Solar Rad. [kWh/m²] � … Efficiency [-] (see 4.1) To find the required collector area, the energy demand has to be divided by the sy stem contribution (equation 5.2). ED AR � SC (5.2) with … A R … Required collector area [m²] ED … Energy Demand [kWh] SC … System Contribution [kWh/m²] As THERMOMAX � modules are only available in 2 and 3 m² sizes, the actual collector area A in [m²] has to be chosen accordingly. - For more precise predictions of the overall performance of the solar system � � THERMOMAX offers the SolarMaster simulation software. Using a statistical method, the calculation of the daily divergent total radiation is based on the combination of theoretical solar radiation data and measured solar radiation data, the collector inclination and the azimuth angle. Integrating the 15 minute calculation interv als over each month simulates the sy stem performance over the year. (5.2) Flow rate The specific flow rate per tube V T in [l/(min Tube)] lies in the range of 0.1 � V T � 0.25 [l/(min Tube)]. Some examples are given in Table 3.
Page 1 and 2: thermomax � Evacuated Solar Energ
Page 3 and 4: Contents 9.0 Appendix 33 9.1 Produc
Page 5 and 6: (2.0) How to get the most out of a
Page 7 and 8: Technical product description nal s
Page 9 and 10: (3.3.1) Roof fixing kits MS System
Page 11: (4.0) How does a THERMOMAX � syst
Page 15 and 16: PCU 20- 60 Sys. Kit PCU 90- 240 C o
Page 17 and 18: p d h � p � 0 . 1� h (5.9) wi
Page 19 and 20: Active System with Short Circuit In
Page 21 and 22: Swimming Pool Installation details
Page 23 and 24: - Or the cap and the ring can be re
Page 25 and 26: Installation steps 1 - 4 Installati
Page 27 and 28: (6.4) KS-System Installation detail
Page 29 and 30: 7 B0177 (20) B0178 (30) 13 A0169 A0
Page 31 and 32: 15 A0921 20 Tube 30 Tube 900 - 1200
Page 33 and 34: (6.6) Alternative Methods Installat
Page 35 and 36: (8.0) Trouble Shooting No circulati
Page 37 and 38: Spare Parts continued Fittings and
Page 39 and 40: Energy available during a 4 month p
Page 41 and 42: (9.4) Checklist Appendix This check
Page 43 and 44: Project Data Appendix Thermomax �
Page 45: Project Data Appendix Thermomax �

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