Prof. M.V. Rane and his student of Department of Mechanical
Engineering have developed a novel hybrid cooling system (HCS)
in which air temperature and humidity are simultaneously controlled
using a novel contacting device, which meets the needs of
dehumidification, decrease in temperature and significant reduction
of consumed electricity. The device increases cooling and dehumidification
capacity of the refrigeration compressor used as well.
The HCS devised uses liquid desiccants to dehumidify the air
drawn. This system has an innovative contacting device. The HCS
has a higher cooling capacity than normal vapour compressor systems.
Also the liquid desiccant can be regenerated without loss to
the outside environment and also does not corrode its parts. The
regenerated desiccant can be used efficiently to dehumidify more air.
The entire system is made of alternative
materials so as to reduce cost,
weight and eliminate corrosion problems
normally faced by air conditioning systems. Liquid-liquid heat exchangers
increase the cooling capacity and
Coefficient of Performance (COP) of the hybrid system. Compared to
the conventional Vapour Compression
Regrigaration System (VCRS), the reheating of air is not needed in
the hybrid system devised. This reduces cooling load,
increases efficiency, cooling capacity and COP and lowers running costs.
Thus, newer generation air conditioners cum dehumidifiers with better features
and technology are possible with HCS
technology devised at IIT Bombay.
Indian patent application no. 154/MUM/2002 Patent grant no. 221716
Inventors: M V Rane and S V Kota Reddy