HabitatEnviro
GreenAC
Cost of “Plugging IN” (for Commercial Consumers Maharashtra, 2005–2025)
2019* 10% of electricity generation 90 million tons of Oil equivalent
2037* 50% of peak electricity demand 180 million tons of Oil equivalent *As per India cooling action plan ICAP 2019
2037* 50% of peak electricity demand 180 million tons of Oil equivalent *As per India cooling action plan ICAP 2019
Working Principle: Liquid Desiccant Powered Air-conditioning
Advantages :
1. Cost Savings: Consumes energy from low cost C renewable energy sources
2. Ecological and Natural Refrigerant
How Does GreenAC Cool?
Ideal solution for difficult-to-air-condition
buildings
- Factory shopfloors and warehouses
- Temporary dwellings for workers
- Public buildings (hospitals, transport hubs, schools, etc.)
- Informal and low-income housing
GreenAC Cooling Process
100% Sensible Cooling , 0% Latent Loss
Operating Data
GreenAC Unit
- Stainless steel construction
- Skid-mounted, no separate installation required
- Non-corrosive salt solution
- IoT/PLC driven
- Size:
- 5 m (5 TR)
- 5 m (15 TR)
- Energy input to provide cooling for 12 hrs/day:
- Hot water at 90°C from solar,biogas, biomass, solar PV, etc.
- 4 TR: 6 kWth for 8 hrs a day
- 15 TR: 25 kWth for 8 hrs/day
GreenAC Desiccant
Note:
- GreenAC uses extensive demisting for zero desiccant carryover
- Also used for de-icing aircraft and runways
Typical Water Consumption/TR of cooling
Water consumption for GreenAC
- Air flow: 600 CMH/TR of cooling
- Water needed/TR of cooling: 2 l/hr
- Water evaporation for cooling of desiccant solution: 2 l/hr
- Maximum water consumption: 4 l/hr per TR of cooling + Drift + Blowdown
- Typical airflow for similar cooling: 1200 CMH
- Water requirement: 7 l/hr per TR of cooling
Water consumption of a typical water-cooled chiller
- Heat to be removed from condensing unit/ton of cooling: ~16000 kJ
- Water requirement = 7 l/hr per TR of cooling + (drift C blowdown losses)
Typical Cooling Capacities
GreenAC Efficiency
- Electrical COP (15 TR cooling unit)
- Pumps (EC pumps), cooling tower, electronics (Duct fan excluded): ~1.75 kW
- Electrical COP: ~15×5/1.75 = 30
- Electrical + Thermal COP
- Thermal energy input for 15 TR cooling: ~18 kW
- Total energy input: 75 + 18 ~ 20 kW
- Overall COP: 15×5/20 = 2.7
Superior energy efficiency compared to existing technologies!
Cost and Emission Reduction
- Capital Costs:
- Air-conditioning unit – Rs 50k per TR of cooling
- Heat source – Solar ETC (2 L for 4 TR, 6L for 15 TR), Biomass boiler – 3L (20 kW)
>80% Cost Savings, >80% Emission Reduction!
Air Purification + Fresh Air Intake+ Safety
- Maintains PM2.5 < 25 and PM10<50 (as per ISHRE recommendations) for healthy indoor air
- Fresh air intake (0 to 100% configurable)
- Anti-viral effect: High temperature regeneration and lower humidity reduces chances of virus survival
- Works at atmospheric pressure, no refrigerant, no chance of fire or explosion.
GreenAC at IIT Delhi
Demonstration of flexibility in input energy
source : Solar-thermal
