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Publikācija: Determination of Cost-Effective Pipelines Insulation of Solar Thermal System

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Nosaukums oriģinālvalodā Determination of Cost-Effective Pipelines Insulation of Solar Thermal System
Pētniecības nozare 2. Inženierzinātnes un tehnoloģijas
Pētniecības apakšnozare 2.7. Vides inženierija un enerģētika
Autori Andrejs Snegirjovs
Peteris Šipkovs
Galina Kashkarova
Lana Migla
Martinsh Vanags
Atslēgas vārdi solar energy, Pipe isolation, cost-effective solar thermal systems
Anotācija Baltic States climate is colder than the average European climate, and solar radiation amount is less. This gives an increased need to optimize the overall solar thermal system for the Baltic States conditions. Solar thermal system manufacturers and vendors emphasize attention to solar energy absorption unit, but the rest of the system components remain in consumer choice. The publication describes a method for selection of the more energy effective and cost profitable pipe insulation type in solar thermal systems. A certain proportion of the solar thermal system generated energy is missed as the heat loss in pipes between the solar energy absorbing devices to the heat-accumulation tank. Pipe isolation is necessary for both an outdoor and indoor pipes of solar energy heating system. Outdoor pipes insulation should conformed to outdoor climate conditions and indoor pipes insulation accordingly should conform to indoor conditions. Amount of pipe heat losses mostly depends on pipe diameter, heat carrier temperature, air temperature of the room or environment. Solar systems heat carrier temperature depends on solar radiation intensity in a given period, and the outside air temperature changes throughout the year. Instantaneous pipeline heat losses are calculated according to the instantaneous heat carrier, outdoor and indoor air temperatures. Results of calculations using the average values are not correct. Therefore, it is necessary to use modeling programs with precise meteorological data. The amount of pipeline heat energy losses in accordance with the pipeline isolation type of solar thermal system was determined with the PolySun simulation program models. The most popular heat pipe insulation materials in Baltic region were inspected and compared. The amount of absorbing energy value and heat losses were calculated and displayed in the graphic form. As a result the method was defined. The method helps determine most cost-effective solar thermal systems pipe insulation type.
Atsauce Snegirjovs, A., Šipkovs, P., Kashkarova, G., Migla, L., Vanags, M. Determination of Cost-Effective Pipelines Insulation of Solar Thermal System. No: ISES Solar World Congress 2011: CD Proceedings, Vācija, Kassel, 28. Aug-2. Sep., 2011. Kassel: 2011, 1.-8.lpp. ISBN 9781618393647.
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  • Scopus  0
ID 14683