Abstract
Heat-driven coolers provide a reliable and environmentally benign alternative to traditional electrically powered chillers. Their main advantage is that they can be driven using low enthalpy heat sources. A solar system is installed at the school of Mechanical Engineering of National Technical University of Athens in order to examine the potential of thermal storage and solar cooling under Athens climatic conditions. The cooling effect is produced using a dual bed, single stage, zeolite/water adsorption chiller with cooling capacity of 10 kW at its nominal conditions of operation. Both vacuum tube collectors and hybrid photovoltaic thermal collectors are installed in order to supply the system with heat. The system is evaluated in terms of solar collectors’ useful energy production, heat stored in the intermediate buffer and cooling system’s performance. It is observed that the cooling system operates satisfactorily under Athens climatic conditions achieving a maximum cooling capacity of 3.7 kW and an average COP around 0.5.
Highlights
Conventional-technology cooling systems consume electricity to actuate their mechanical compressor. When this electrical energy comes from the power grid, the use of traditional vapor compression systems is accompanied by the following disadvantages: 1
Increase of carbon dioxide (CO2 ) emissions since the largest percentage of electrical energy is produced by non-renewable energy sources
Alam et al [9] investigated theoretically the possibility of applying an adsorption solar cooling system under Tokyo, Japan climatic conditions. They used 36.225 m2 of compound parabolic collector panel (CPC) collectors in order to power a silica gel/water adsorption chiller and they found that a cooling capacity around 10 kW was achieved at noon, with maximum COP and SCOP
Summary
Conventional-technology cooling systems consume electricity to actuate their mechanical compressor. Alam et al [9] investigated theoretically the possibility of applying an adsorption solar cooling system under Tokyo, Japan climatic conditions They used 36.225 m2 of CPC collectors in order to power a silica gel/water adsorption chiller and they found that a cooling capacity around 10 kW was achieved at noon, with maximum COP and SCOP around 0.55 and 0.3, respectively. Koronaki et al [14] investigated theoretically the possibility of applying solar cooling in eastern Mediterranean areas They used various types of solar collectors, including PV/Ts, in order to power an adsorption chiller and evaluated the system’s performance in terms of cooling capacity, COP, energy and exergy efficiency. During summer period in terms of cooling capacity and COP and exergy efficiency
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
