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Aquaponics systems show their greatest efficiency when they are operated in a greenhouse. This makes it easier to regulate the temperature and collect the evaporated water. In summer it is important to ensure that the temperature is sufficiently low, otherwise the fish will die. Most plants don't have any problems at 25 degrees Celsius, but above that it becomes problematic. A first indication is the climate zone from which the plant in question comes. Which materials you should use for the greenhouse is a challenging calculation. Must be taken into account (among other things):
The deadline for amortization is particularly important for entrepreneurs; non-commercial cultivation is a completely different matter. Ask us... Here you will find example calculations for energy consumption. See also the article: Thermal Insulation |
Typical values of construction
| Component | Thickness | U-value in W/(m² K) |
| Exterior wall made of concrete without thermal insulation | 25cm | 3.3 |
| Exterior wall made of bricks | 24cm | approx. 1.5 |
| 36.5cm | approx. 0.8 | |
| Exterior wall made of bricks (17.5 cm) with thermal insulation composite system (PUR) |
30 cm | approx. 0.32 |
| Exterior wall made of highly porous perforated brick, unplastered | 50cm | 0.17-0.23 |
| Exterior wall made of wood frame construction, typical apartment structure | 25cm | 0.15-0.20 |
| Exterior wall made of solid wood (without thermal insulation) | 20.5cm | 0.5 |
| Exterior wall made of aerated concrete | 36.5cm | 0.183-0.230 |
| 40cm | 0.163-0.210 | |
| 50cm | 0.125-0.146 | |
| Interior wall made of bricks | 11.5cm | 3.0 |
| Interior wall made of aerated concrete | 28cm | approx. 0.6 |
| Exterior door made of wood or plastic | – | 3.49 |
| Acrylic glass (plexiglass) | 5mm | 5.3 1 |
| Single window | 4mm | 5.9 1 |
| Double windows | – | 3.0 1 |
| Windows with insulated glazing | 2.4cm | 2.8-3.0 |
| Windows with thermal insulation glazing | 2.4cm | approx. 1.3 |
| Total windows requirement energy certificate Switzerland (2011) | – | 1.3 |
| Light building element made of polycarbonate | 5cm | approx. 0.83 |
| Passive house standard windows | – | 0.5-0.8 |
1 For panes, the value is essentially determined by the heat transfer resistance
| Material | Thermal conductivity λ in W/(m K) |
|---|---|
| vacuum insulation board | 0.004…0.006 |
| Airgel | 0.017…0.021 |
| Resol resin | 0.021 |
| Polyurethane (PUR) | 0.021…0.035 |
| Expanded polystyrene with graphite (Gray EPS) | 0.030…0.035 |
| Extruded polystyrene (XPS) | 0.032…0.040 |
| Mineral wool / rock wool (raw density in kg/m 3 from 30 to 220) | 0.032…0.050 |
| Polyethylene foams | 0.034…0.040 [7] |
| Wool | 0.035 |
| Sheep wool | 0.035…0.045 [8] |
| cork | 0.035…0.046 |
| Expanded polystyrene (EPS) | 0.035…0.050 |
| cellulose | 0.037…0.045 |
| Wood fiber insulation board | 0.038 [9] …0.060 |
| jute | 0.038 [8] |
| Straw bales | 0.038…0.067 |
| Hemp insulation mats | 0.042 [10] |
| flax | 0.040 [8] |
| Foam glass | 0.040 |
| hemp | 0.040…0.045 [8] |
| Seaweed | 0.040…0.049 [8] |
| wood fiber | 0.040…0.060 [8] |
| Perlite (rock) | 0.040…0.070 |
| Reed plate | 0.045…0.055 |
| straw | 0.043 [11] …0.072 [8] |
| Thermal insulation plasters, e.g. B. with polystyrene foam balls | 0.055…0.070 [12] |
| Perforated brick, porous | 0.070…0.450 |
| Aerated concrete (gas concrete) | 0.080…0.250 |
| Glass foam granules | 0.080 |
| Wood wool lightweight building board | 0.090 |
| expanded clay | 0.100…0.160 [8] |
| Thermal plaster with mineral lightweight aggregates | 0.110 [13] |
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Source: https://de.wikipedia.org/wiki/W%C3%A4rmeleitf%C3%A4higkeit
Context:
Individual evidence
- ↑ David R. Lide (ed.): CRC Handbook of Chemistry and Physics . 87th edition. (Internet version: 2006-2007), CRC Press/Taylor and Francis, Boca Raton, FL, Properties of Solids, pp. 12-204 ( limited preview in Google book search).
- ↑ Walter J. Moore: Physical Chemistry. Walter de Gruyter, 1986, ISBN 978-3-11-010979-5 , p. 47 ( limited preview in Google book search).
- ↑ Confusion about thermal conductivity . In: Deutsches Architektenblatt , October 1, 2013.
- ↑ Handbook Concrete Protection through Coatings, Expert Verlag 1992, page 413
- ↑ Sven Fuchs, Andrea Förster: Rock thermal conductivity of Mesozoic geothermal aquifers in the Northeast German Basin . In: Chemistry of the Earth – Geochemistry . Volume 70, Supplement 3, August 2010, pp. 13–22, doi : 10.1016/j.chemer.2010.05.010 ( edoc.gfz-potsdam.de [PDF]).
- ↑ Information sheet 821 (PDF; 877 kB); Stainless steel – properties; Publisher: Stainless Steel Information Center Table 9; Status: 2014.
- ↑ Data sheets for Trocellen PE insulation materials, accessed on July 30, 2010 ( Memento from August 21, 2010 in the Internet Archive )
- ↑ Jump up to: a b c d e f g h Guide to ecological insulation materials (PDF; 6.3 MB) from BENZ GmbH & Co. KG Baustoffe, accessed on March 1, 2017.
- ↑ Product information Thermosafe-homogen® from the company GUTEX Holzfibreboardworks H. Henselmann GmbH & CO. KG, accessed on November 2, 2021.
- ↑ Product information THERMO HEMP PREMIUM from THERMO NATUR GmbH & Co. KG, accessed on February 22, 2020.
- ↑ ISO-Stroh, data sheet on dpm-gruppe.com, accessed on June 2, 2021
- ↑ Thermal insulation plasters from Hasit. In: Hasit.de. Retrieved November 2021
- ↑ ThermoPutz , mineral; Baumit company. In: Baumit.de
- ↑ Hans-Jürgen Bargel, Hermann Hilbrans: Materials Science . Springer, 2008, ISBN 978-3-540-79296-3 , p. 275 ( limited preview in Google book search).
- ↑ Material properties of the casting alloys (PDF) and the pipe materials (PDF) from Wieland-Werke AG, accessed in August 2014.
- ↑ Thermal conductivity . ( Memento from March 11, 2016 in the Internet Archive )
- ↑ Jump up to: a b c d e f g h i David R. Lide (ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press/Taylor and Francis, Boca Raton, FL, Fluid Properties, pp. 6-184. Values apply at 300 K.
- ↑ schweizer-fn.de
- ↑ Jump up to: a b c d e f g h i j k Horst Czichos (ed.): The basics of engineering, D materials, thermal conductivity of materials . 31st edition. Springer, 2000, ISBN 3-540-66882-9 , p. D 54.
- ↑ Jump up to:a b Data sheets technical plastics and their properties, accessed on November 23, 2010 .
- ↑ Entry at makeitfrom.com
- ↑ Jump up to: a b c d schweizer-fn.de
- ↑ David R. Lide (ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press/Taylor and Francis, Boca Raton, FL, Fluid Properties, pp. 6-220.
- ↑ Lecture notes Hydroscript. – PTB Braunschweig ( Memento from September 24, 2015 in the Internet Archive ).
- ↑ geizhals.eu
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