ENERGY EFFICIENT LIQUID DESICCENT REGENERATION

摘要

The present invention relates to a novel energy efficient liquid desiccant regeneration, and further relates to the application of rotating contacting discs to provide intimate contact between LID and vapour/gas without problems of carryover of LID in to the vapour/gas stream or flooding and suitable for low liquid throughputs, with significant change in concentration. The main advantages of energy efficient multi-stage regeneration of LID are no carryover problem, no orifices or nozzles to wear or clog, modular system that can be installed with flexibility, silent operation without splashing or spraying sounds and low auxiliary electrical power consumption. The present invention also relates to a novel contacting device to provide intimate contact between fluids to enhance the interfacial area between them for increased heat and/or mass transfer, without problems of carryover of liquid in to the vapour/gas stream or flooding, having the provision to heat/cool the liquid based on the application. The novel contacting device in combination with appropriate devices is capable of being used for applications involving dehumidification, humidification, cooling towers, air-conditioning. Further this can be used for applications involving separation of gases from the liquid, regeneration of liquid desiccants, distillation columns, rectification columns, absorption refrigeration systems, multiphase-multi component adiabatic/non-adiabatic chemical/bio reactors, and cold/heat storage applications. The present invention further relates to a Hybrid Cooling System (HCS), in which air temperature and humidity are simultaneously controlled using a contacting device, which meets the needs of dehumidification, decrease in temperature and significant reduction in electrical power consumption with increase in cooling and/or dehumidification capacity for a given refrigeration compressor. The main advantages of the system are the significantly improved energy efficiency, elimination of carryover of LID into process air streams, increase in cooling capacity for a given compressor in comparison to the conventional HCS using "packed" or "spray type-contacting devices". The pressure ratio across the compressor is reduced up to 36%. The cooling effect produced is increased up to 60% and COP increased up to 45% as compared to VCRS for air conditioning and refrigeration applications involving cooling and/or dehumidification/drying.