Provide a drying heat source: Heat pump heat exchangers can raise the temperature of environmental heat or waste heat, providing a stable heat source for the food drying process. For example, in the process of drying fruits and vegetables, a heat pump drying system can heat the air to a suitable temperature (such as 50-70 ℃), allowing the moisture in the fruits and vegetables to slowly evaporate at a lower temperature. This not only preserves the nutritional content and flavor of the food, but also improves the drying efficiency. Compared with traditional hot air drying methods, it can save a lot of energy.
Recycling of Waste Heat from Drying Exhaust Gas: The exhaust gas emitted during the food drying process contains a certain amount of heat and moisture, which can be cooled by a heat pump heat exchanger to recover the heat and condense the moisture in the exhaust gas. The recovered heat can be used to preheat fresh air or other process steps, reducing energy consumption during the drying process. Taking mushroom drying as an example, recovering exhaust heat through a heat pump heat exchanger can reduce drying energy consumption by 20% -30%.