Conventional Vapor Compression AC

Key issues and challenges


Outdated Technology

Invented in 1902 by Willis Carrier - Compressor AC technology is more than one century old.


Chemical Refrigerant (CFC/HCFC)

Use of CFC/HCFC & discharge of heat to ambient result in global warming and ozone depletion.


Loud & Noisy

Noisy due to compressor operation.


Coupled Sensible and Latent Cooling

All in one single process makes precise control of parameters difficult.


Vapor Compression COP

Low COP of 3 to 5 (1 unit of cooling for X unit of energy input).


Pressurized System

Can cause potential refrigerant leakage.

Other Disadvantages

Disadvantages of Conventional Air Conditioners

High Energy Consumption and Cost

Low COP results in high energy consumption and cost.

Uses Chemical Refrigerant (CFC/HCFC)

Due to various reasons, CFC/HCFC may leak and increase global warming & ozone depletion.

Constant Discharge of Heat to the Ambient

Increases global warming.

Noisy due to Compressor Operation

Compressor generates noise during operation.

Pressurized System

CFC/HCFC are pressurized and susceptible to leakage.

Coupled Sensible and Latent Cooling

Makes it difficult to achieve precise control of different parameters.

Vapor Compression – Low COP of 3 to 5

1 unit of cooling for X unit of energy input.

Potential Hazards

Large commercial air condition system may use cooling towers, which if not properly maintained, can be a source of legionnaires’ disease and sick building syndrome.