Kerosene refrigeration units, also known as kerosene fridges, work on the principle of absorption refrigeration. The cooling system in a kerosene fridge utilizes a combination of kerosene, ammonia, water, and hydrogen gas to generate cooling. Here's how it generally works:
Evaporator: The process begins with the evaporator, which is a network of tubes located inside the refrigerator. The evaporator is responsible for absorbing heat from the interior of the fridge, causing the temperature inside to decrease.
Absorber: The ammonia vapor created in the evaporator is then absorbed by a solution of water and ammonia within the absorber. This creates a concentrated ammonia solution.
Generator: The concentrated ammonia solution flows to the generator, where it comes into contact with a heating element (kerosene flame in this case). The heat causes the ammonia to separate from the water, producing ammonia vapor.
Condenser: The ammonia vapor flows into the condenser, which is a coil located outside the fridge. In the condenser, the ammonia vapor releases its heat to the surrounding environment and condenses into a liquid.
Expansion Valve: The high-pressure liquid ammonia passes through an expansion valve, where it undergoes a rapid pressure drop, converting it back into a low-pressure vapor. This vapor is then directed back to the evaporator to start the cycle again.
Regarding potential problems and considerations before buying a kerosene refrigerator:
Operating Cost: Kerosene fridges can be less energy-efficient compared to conventional electric refrigerators. The cost of kerosene or other fuels required to operate the fridge should be considered, especially if you live in an area with high fuel prices.
Maintenance: Absorption refrigeration systems are generally more complex than traditional compressor-based refrigeration units. They might require more maintenance and can be less forgiving if neglected.
Cooling Efficiency: Kerosene fridges may not cool as effectively as electric refrigerators, particularly in very hot climates or during periods of high ambient temperatures.
Safety: Burning kerosene or other fuels to power the refrigerator involves open flames and combustion processes, which carry inherent safety risks. Proper ventilation and installation are crucial to avoid any potential hazards.
Availability: Depending on your location, finding a kerosene refrigerator or obtaining kerosene fuel might be challenging.
Environmental Impact: The use of kerosene or other fuels for cooling can have environmental implications, contributing to greenhouse gas emissions and air pollution.
Before purchasing a kerosene refrigerator, it's essential to research the specific model and consider your individual needs and circumstances. If possible, read reviews from other users to understand their experiences with the product. If you have concerns about the environmental impact or safety of kerosene fridges, you might also explore more eco-friendly and energy-efficient alternatives for refrigeration.