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Read More Why Ammonia?
Ammonia is the best substance to use for cooling and refrigeration since it has the following qualities:
- Ammonia is a well-known and recognized refrigerant that has been used safely in refrigeration for more than 100 years.
- Like other natural refrigerants, it poses no damage to either the ozone layer or the earth’s climate.
- Better efficiency.
- Better heat transfer coefficient.
- Greater availability at a lower cost.
- Non-miscibility with lubricating oil.
- Less energy for pumping.
- Suitability for all temperatures, from Low -50°C to High +70°C.
- Ideal for both reciprocating and screw compressors.
- Flexibility when plant and extensions and modifications are needed.
- Suitable for all refrigeration capacities.
AMMONIA AS A REFRIGERANT: FACTS VS MISCONCEPTIONS
| Actual Facts | Misconceptions |
|---|---|
| Ammonia has a very pungent odour and even small leaks as low as 5PPM can be detectable, serving as an early warning. Lab trials have proved that continuous exposure for levels up to and exceeding 242PPM even for 10-15 years has no adverse effects on human beings. | Ammonia is Toxic |
| Ammonia is extremely hard to ignite, even up to 650°C. It is classified as a B2L, which is less flammable compared to many other hydrocarbons used in everyday life. Due to high affinity of ammonia for atmospheric humidity, it is hardly flammable. | Ammonia is Flammable |
| Ammonia air cooled condensers are available and even hybrid condensers are becoming popular. | Ammonia cannot be used for air cooled applications |
| Low charge factory made packaged refrigeration systems of less than 0.3kg of ammonia per ton are available. | Ammonia Systems require much more refrigerant as compared to other refrigerant systems |
| Ammonia compressors with 7kW capacity have been developed for small capacity package units. Semi as well as fully hermetic compressors now developed. Direct expansion systems with miscible oils using electronic expansion valves are available. | Unavailability of smaller capacity and direct expansion Ammonia Systems. |
| Increased use of natural refrigerants and due to its excellent energy saving properties, many countries now use ammonia with secondary fluids like water, brines and CO2. Heathrow Terminal 5 & Singapore Airport are such examples. | Ammonia cannot be used for Air Conditioning systems |
| Fully automatic Ammonia refrigeration plants being used for the last 30 years, some even remote controlled from a central panel. | No automation in Ammonia Plants |
| This is a myth. Ammonia is a natural refrigerant whereas most man made refrigerants on their way out as developed countries are doing away with them. | Ammonia is going to be banned |
