Factors affecting the outlet temperature of Roots blowers

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The factors that affect the outlet temperature of a Roots blower mainly include: the volumetric efficiency of the Roots blower, the operating pressure, internal leakage of the blower, and the temperature of the air being drawn in. Some of the factors mentioned above are fixed once the fan is manufactured, and they are closely related to the technical capabilities of the fan manufacturer. All we can do is reduce the outlet pressure, lower the temperature of the incoming air, or find other ways to reduce the outlet temperature. In many cases, due to process limitations, the outlet pressure at wastewater treatment plants cannot be reduced. You can start from the following aspects: 1. If the Roots blower is installed indoors. Air conditioning can be installed if conditions permit. Don’t waste the air conditioner and electricity costs. Because for every 10-degree increase in motor temperature, its lifespan is significantly reduced. Therefore, installing air conditioning indoors can both extend the lifespan of the equipment and lower the outlet temperature. 2. If it is equipped with a soundproof cover, be sure to open the door of the cover in summer. As far as I know, soundproof enclosures available in China don’t provide any real sound insulation; instead, they increase the ambient temperature, which results in higher temperatures of the air being drawn in, as well as very high exit temperatures. 3. Minimize pipeline pressure losses and other types of pressure losses as much as possible. 4. Here’s an empirical formula: the outlet temperature of a three-blade Roots blower = inlet temperature + (10–12) * pressure. The unit for pressure here is meters of water column. For example, if the water level is 6 meters, and the pressure losses due to pipeline friction and diaphragm losses (in sewage treatment plant aeration systems) are 1 meter, with an ambient temperature of 30 degrees, then the outlet temperature will be between 100 and 114 degrees. So from this formula, you can understand the significance of reducing the inlet temperature and outlet pressure. As far as I know, in summer, the inlet temperature of many Roots blowers equipped with soundproof enclosures exceeds 45 degrees. The above content may not be reproduced or used without permission!