Demonstration of Solar Heating and Cooling System using Sorption Integrated Solar Thermal Collectors
2014 (English)In: EuroSun 2014 / ISES Conference Proceedings (2014), ISES , 2014Conference paper (Refereed)
Producing cost-competitive small and medium-sized solar cooling systems is currently a significant challenge. Due to system complexity, extensive engineering, design and equipment costs; the installation costs of solar thermal cooling systems are prohibitively high. In efforts to overcome these limitations, a novel sorption heat pump module has been developed and directly integrated into a solar thermal collector. The module comprises a fully encapsulated sorption tube containing hygroscopic salt sorbent and water as a refrigerant, sealed under vacuum with no moving parts. A 5.6m2 aperture area outdoor laboratory-scale system of sorption module integrated solar collectors was installed in Stockholm, Sweden and evaluated under constant re-cooling and chilled fluid return temperatures in order to assess collector performance. Measured average solar cooling COP was 0.19 with average cooling powers between 120 and 200 Wm-2 collector aperture area. It was observed that average collector cooling power is constant at daily insolation levels above 3.6 kWhm-2 with the cooling energy produced being proportional to solar insolation. For full evaluation of an integrated sorption collector solar heating and cooling system, under the umbrella of a European Union project for technological innovation, a 180 m2 large-scale demonstration system has been installed in Karlstad, Sweden. Results from the installation commissioned in summer 2014 with non-optimised control strategies showed average electrical COP of 10.6 and average cooling powers between 140 and 250 Wm-2 collector aperture area. Optimisation of control strategies, heat transfer fluid flows through the collectors and electrical COP will be carried out in autumn 2014.
Place, publisher, year, edition, pages
ISES , 2014.
solar cooling, air conditioning, sorption, heat pump. thermo-chemical storage
Research subject Energi, skog och byggd miljö, Reesbe företagsforskarskola
IdentifiersURN: urn:nbn:se:du-15619OAI: oai:DiVA.org:du-15619DiVA: diva2:746634
EuroSun 2014, Aix-les-Bains (France), 16 – 19 September 2014