Kerosene refrigeration units, also known as kerosene fridges or gas absorption refrigerators, work on a different principle compared to conventional electric compressor refrigerators. Here's how the cooling system operates in a kerosene refrigeration unit:
Absorption Cycle: Kerosene refrigerators use an absorption refrigeration cycle, which consists of four main components: the generator, condenser, evaporator, and absorber. The process involves a combination of heat, pressure, and a mixture of ammonia, hydrogen, and water as the refrigerant.
Heat Source: Instead of an electric compressor, a kerosene refrigerator relies on a heat source to generate the necessary energy for the cooling process. This heat can come from burning kerosene, propane, or natural gas. Some models may also use electric heating elements.
Generator: The process starts in the generator, where the heat from the external source is applied to a solution of ammonia and water. This causes the ammonia to vaporize and separate from the water.
Condenser: The ammonia vapor travels to the condenser, where it releases heat and condenses back into a liquid state. This process further cools the ammonia.
Evaporator: The liquid ammonia then flows to the evaporator, where it absorbs heat from the refrigerator's interior. This absorption of heat cools down the interior of the refrigerator.
Absorber: After absorbing heat in the evaporator, the ammonia returns to the absorber, where it combines with a weak solution of ammonia and water. This forms a strong solution, and the process starts all over again in the generator.
Now, when considering a kerosene refrigeration unit for your home, there are some important factors to be aware of:
Energy Source: Kerosene fridges require a continuous supply of kerosene, propane, or natural gas for their operation. This means you'll need to ensure a constant supply of the chosen fuel, which may not always be as readily available or as convenient as electricity.
Maintenance and Safety: Gas absorption refrigerators can be more complex than standard electric refrigerators, and they may require more maintenance. It's crucial to have the unit regularly serviced by a qualified technician to ensure safe and efficient operation.
Cooling Efficiency: Kerosene refrigerators typically have lower cooling efficiency compared to electric compressor refrigerators. They may take longer to cool and might not maintain consistently low temperatures, which can impact food preservation.
Initial Cost: Kerosene fridges can be more expensive than electric refrigerators, mainly due to their specialized design and components.
Environmental Considerations: Gas absorption refrigerators may emit small amounts of harmful gases during operation, such as ammonia. While these emissions are typically within safe levels, it's essential to ensure proper ventilation in the installation area.
Overall, kerosene refrigeration units can be a suitable option for certain off-grid or remote locations where access to electricity is limited. However, for typical home use, electric compressor refrigerators remain the most common and efficient choice. Before purchasing a kerosene refrigerator, carefully consider your energy needs, maintenance requirements, and cooling efficiency to determine if it's the right fit for your specific situation.