A simple pedal-powered generator could theoretically be used to run a household refrigerator during an extended power outage, but there are several practical considerations to take into account.
Power Output: As you mentioned, your refrigerator uses about 100 watts while running. To power it continuously for an extended period, you would need to generate at least 100 watts of continuous power from the pedal-powered generator. Achieving this output can be challenging, as it requires a sustained effort from the person pedaling.
Human Endurance: Pedaling for an extended period to generate continuous power for a refrigerator can be physically demanding. While it can provide a workout, it's essential to consider the stamina and endurance required for this task. Not everyone may be able to pedal for long periods consistently.
Efficiency Losses: Pedal-powered generators may not be as efficient as grid electricity or conventional generators, and there will be energy losses in the mechanical system, conversion, and transmission. This means you may need to pedal more than 100 watts to account for these inefficiencies.
Battery Storage: To handle the fluctuations in power generation and consumption, you may need to incorporate a battery storage system. This will allow you to store excess power generated during high pedaling periods and use it when the refrigerator needs power but the generator is not actively being pedaled.
Food Safety: During a power outage, it's crucial to maintain the appropriate temperature inside the refrigerator to keep food safe for consumption. If the generator cannot consistently meet the power demands of the refrigerator, there could be safety concerns regarding food spoilage.
Emergency Preparedness: While a pedal-powered generator can be an interesting project and potentially serve as a backup power source during short-term outages, it might not be the most practical or reliable solution for extended power disruptions. For long-lasting power needs during emergencies, traditional backup generators (either gasoline, diesel, natural gas, or solar-powered) or other renewable energy systems are more suitable options.
In summary, while it's possible to use a pedal-powered generator to run a household refrigerator during a power outage, it requires careful consideration of power output, human endurance, efficiency losses, battery storage, and food safety. Depending on the circumstances, a pedal-powered generator might not be the most efficient or sustainable solution for an extended outage.