Chromasun, the commercial/industrial solar building solutions provider, is to showcase its MCT (Micro Concentrator) technology in the Arab Emirates.
The move is part of its collaboration with the Abu Dhabi Water and Electricity Authority, which sees the solar driven system supplementing building air-conditioning load and offseting peak electrical consumption with clean, renewable energy.
It has been designed specifically for rooftop integration. The MCT is low profile, lightweight and has no external moving parts, and is claimed to be easy to maintain. Using a 25x Fresnel reflector optic, the MCT generates temperatures up to 220 deg C (428°F).
It harnesses solar energy on the rooftop and outputs high temperature fluid or steam, which can be used to drive efficient double‐stage absorption chillers and provide heating or cooling to a building.
Chromasun driven solar cooling systems are suitable for sunny climates when system sizes of between 50 and 500 refrigeration tons are contemplated.
Unlike larger solar concentrator systems, the MCT integrates on the rooftop because of its flat panel format unlike other commercially available high temperature solar thermal technologies, such as Parabolic Trough and Linear Fresnel, which are said to be expensive, complex, cumbersome and hard to maintain.
Chromasun also claims it has developed the first solar micro‐concentrator that is low‐cost, able to consistently achieve temperatures up to 220 deg C yet seamlessly integrates into the architecture of buildings.
The MCT harvests high grade thermal energy much more efficiently than existing “one sun” solar thermal collectors.
These traditional solar hot water products, such as flat plate and evacuated tube collectors, are architecturally compatible but cannot achieve the temperatures needed to drive double effect chillers and thermal storage systems.
The embodied energy in MCT HT solar collectors is a low 56-MJ/kg. This compares favourably to photovoltaic panels at 410-MJ/kg.
The MCT technology will be installed at the Abu Dhabi Distribution Company Distribution Management Centre, which is presently air-conditioned by conventional electrically driven screw type chillers which have significant peak power demands on hot days.