CGA, worldwide leader in aluminum heat exchangers production, developed the Roll Bond technology to the production of new absorber for Solar Thermal, Thermodynamic, Solar Heating and Cooling and PV Hybrid.
CGA Technologies has developed a complete range of natural circulation and pressurised solar absorbers using its own technology from 2000 to the present day.
The channelling arrangement in the CGA Technologies’ solar absorber is obtained thanks to a screen print process that uses a special ink developed during more than 10 years research.
The result is a series of internal channels which are tailored to meet the customer’s requirements and guarantee the best circulation of the thermal-carrier fluid, and consequently, the best energy exchange thanks to large surface area involved.
The absorber-exchanger is then completed with a manifold that includes the hydraulic connections (in aluminium) and is finished with a semi-selective coating (normally black).
The maximum dimensions which can be obtained correspond to 1 metre x 3.6 metres, thereby allowing applications which are also able to satisfy the most demanding architectural requirements. In addition, the surfaces can be flat or Double Channel.
The CGA Technologies solar absorber-exchanger is readily integrated both on the facade of buildings and on the roofs.
The systems constructed using the CGA Technologies absorber-exchanger enable domestic hot water or heating water to be produced, both for private use and for public facilities, for example, swimming pools, hospitals, schools, also integrating with District Heating systems.
The solar panel can also be used during the winter period to preheat the domestic water or the heating system.
The CGA Technologies solar absorber-exchanger needs to be used with a special thermal-carrier fluid to guarantee its maximum performance and duration.
Solar Heating and Cooling
Solar thermal can cover 50% of the total heat demand, if the heat demand is first reduced by energy saving measures.
The main ones are the active solar façade building as offices, hotel, hospital, school; the active solar renovation as social buildings or industrial buildings, solar heat for district heating and cooling too.
Roll Bond Technology is the newest driver of the Sustainable Energy generation all over the world.
From today, air conditioning and the production of hot domestic water are possible with a single and innovative solar absorber produced using ROLL-BOND technology.
For example, the system comprises a solar field composed of the “ROLL-BOND absorber”; two accumulators for the solar thermal-carrier fluid and one accumulator for the cold water to the utility, one absorption machine (for example, a Water - Lithium Bromide single-stage type), a cooling tower to disperse the heat generated by the chiller, a make-up boiler that compensates the possible absence of solar radiation.
Operates virtually in all weather conditions, even at night and in any climatic condition during both the winter and summer periods.
Used to produce hot water for both domestic and industrial plants, for example, greenhouses and farms and for public facilities, for example, swimming pools, schools and hospitals.
Readily integrated in facades, roofs with any type of exposure.
The panel can fully replace the traditional “passive” type aluminium panel on the facades of buildings, transforming a “decorative” surface area into a “decor-active” surface area.
The system comprises a series of ROLL-BOND panels inside which a gas normally circulates (R134A).
A heat pump is obtained, thanks to a low electric power compressor and a condenser included in an accumulation system, this arrangement is able to heat the water in the circuit up to approximately 50°C.
For example: thermal power exceeding 1,500 Watt can be produced with a panel sized approximately 1mx2m. This also enables the Solar Thermodynamic panel to be used in small and medium-size residential complexes.
Contact the CGA Technologies Research and Development service for all specific technical information.