Low temperature evaporators are often equipped with technologies such as heat pumps and multi effect evaporation, and are often operated in a vacuum environment for low-temperature operation. The improvement in heat transfer efficiency compared to traditional evaporators varies greatly depending on the specific model and application scenario. In some scenarios, the improvement is significant, as follows:

Low temperature heat pump evaporator: This type of low-temperature evaporator recovers the latent heat of secondary steam and reuses it. Compared to traditional evaporators that rely on steam or electric heating, the energy-saving effect corresponds to a significant improvement in heat transfer efficiency. For example, Huannuo Energy's low-temperature heat pump evaporator has an energy utilization rate of over 80%, which is 50% -70% more energy-efficient than traditional methods; The Huanmei low-temperature heat pump evaporator can achieve over 90% energy savings, indirectly reflecting its heat transfer efficiency far superior to traditional steam or electric heating evaporators. After all, the core support of energy-saving effect is the improvement of thermal energy utilization rate during the heat transfer process.

Low temperature multi effect horizontal tube falling film evaporator: This model has a temperature difference of only 2.5-3 ℃ per effect, which is only one-third of the traditional vertical tube falling film evaporator. Under the same conditions, a traditional vertical tube falling film evaporator can only complete a one effect cycle using a steam compressor with a temperature rise of 10 ℃, while it can complete a three effect cycle evaporation, with an evaporation capacity three times that of traditional models. This means that when consuming the same amount of energy (such as the energy consumption of a steam compressor), the evaporation efficiency from the heat exchanger is significantly improved, and the heat exchange efficiency is significantly ahead. Moreover, when completing the same amount of evaporation, its electricity consumption is only one-third of that of traditional models.

Siphon type low-temperature evaporator: In refrigeration scenarios such as cold storage, the heat transfer coefficient of siphon type low-temperature evaporator reaches 1800-2200W/(m ² · K), while traditional evaporator is about 1200-1500W/(m ² · K). Based on this, the heat transfer efficiency is estimated to be improved by about 40%. At the same time, it can make the refrigerant distribution more uniform. For example, in a Freon refrigeration system, the fluctuation of the outlet refrigerant superheat can be controlled within ± 1 ℃, which is much better than the fluctuation range of ± 3-5 ℃ in traditional evaporators. While improving heat transfer stability, it also increases the overall heat transfer efficiency by 10% -15% compared to traditional models.

However, it should be noted that if a regular single effect low-temperature evaporator is not equipped with enhanced technologies such as heat pumps and relies solely on vacuum to achieve low-temperature operation, the improvement in heat transfer efficiency compared to traditional single effect evaporators is relatively small, and the heat transfer temperature difference may even be reduced due to low temperature, resulting in a slightly lower heat transfer rate. In this case, its core advantage is more reflected in protecting thermosensitive materials rather than simply improving heat transfer efficiency.