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Air-cooling, and generation of hot and cold water are essential utilities for human comfort and convenience. Generally, these utilities are provided by separate systems, each with its own capital costs and energy requirements. A hybrid System for Air-cooling, Cold- and Hot-water generation (SACH), which combines the functions of air-conditioning, water heating, and potable water-cooling has been developed by Prof. Milind Rane of Mechanical Engineering Department. Potentially useful in community and residential places, the 3-in-1 heat pump was successfully demonstrated in a hostel premise on the IITB campus. The system not only provides air-conditioning in the inadequately ventilated computer laboratory, but also heats tap water for use in the kitchen and bathrooms, and cools drinking water in the dining hall. The initial capital cost for this system is lower than the combined cost of conventional methods, with an additional 60 to 70% reduction in the operational cost. These energy-saving, environment-friendly, window and split heat pumps have also been successfully demonstrated in residential and community premises. The table shows a comparison of the power profiles of conventional utilities and the new heat pump developed at IITB. Patent applications have been filed, and the technology is available for licensing for commercial exploitation.

Contact: Prof M V Rane ranemv@me.iitb.ac.in

 

Utilities Produced

EWH+AC+WC HP
Tap Water Heating to 450C 7 x 2 kW 2 x 6 kW
Air Conditioning 2 x 1.5 TR 2 x 1.5 TR
Water Cooling 0.5 TR 2 x 0.25 TR
Power Consumed EWH+AC+WC  HP
Electric Water Heater (EWH)* @ 10 h/day 7 x 2 kW  
Air Conditioners (AC)* @ 12 h/day 2 x 2.08 kW  2 x 1.8 kW
Water Cooler (WC)* @ 12 h/day 0.75 kW  
Total Power Consumption 199 kWh/day 43 kWh/day
Reduction in Power Consumption   78%
 

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