providing high contact surface/volume ratio. One corrosion resistant solution/ solution heat exchanger has also been designed, using graphene nanoparticles to increase its thermal conductivity. Then beginning of the project involved
establishing the specifications of the system in terms of power requirements, working temperatures, dehumidification level, and other
parameters. Multifunctional nanomaterials science were developed. After this,
exchangers based on latest advancements in
then the full HLD AC
system was designed, which has been constructed and is undergoing testing both in a laboratory and in a demonstration site. Finally, a life cycle assessment methodology will be developed in order to demonstrate a genuine life cycle improvement beyond the existing scenario. A mathematical model of the liquid
desiccant system has been developed in EES software that can be used for both the design and simulation of the entire HLD system and its main components. Scaling up of the proof of concept in real conditions has begun, with a fully operation demonstrator being tested and operated in Taiwan inside a swimming pool where latent heat loads are particularly important. “The humid environment of a swimming pool in a country such as Taiwan is where the nanoCOOL system works best,” says Novotna. A control
system specifically the absorber, regenerator, compressor,
accumulator, the expansion valves and the three heat exchangers: the liquid-liquid solution heat exchanger, a heat exchanger in the absorber and a heat exchanger in the regenerator. The
absorber and the
regenerator are integrated with the evaporator and the condenser respectively of the vapour compression system. The liquid desiccant and refrigerant are simultaneously circulated between the evaporator and condenser for cooling and dehumidifying the air. The liquid desiccant is gravitationally distributed over planar surfaces of fins configured perpendicular to the refrigerant tubes for contact with air forced along the surface of the planar fins. In the absorber, both the air and solution are cooled by evaporation of the refrigerant and the air is dehumidified by the direct contact with the falling solution film. In the regenerator, the regeneration air and solution are heated by condensation of the refrigerant and the solution is regenerated by direct contact with the regeneration air.
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In the solution heat exchanger, the heat exchange
takes place between the hot
regeneration side solution and the cool process side solution. The issue of corrosion has been tackled
through the development of two new tubes made of plastic, which are resistant to the lithium chloride desiccant used. These tubes improve efficiency of the system by
developed to control separately humidity and temperature has been designed. Used in conjunction with rooftop packaged
conventional air conditioners or in stand- alone units, the nanoCOOL system is capable of reaching its temperature and humidity targets more
rapidly and with far less
energy than other equipment. While the primary function of the
nanoCOOL system is dehumidification and cooling, the technology also cleans air. The
heat
The whole consortium with prototype
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