What is the difference between total heat exchange membrane and sensible heat exchange membrane?

Total heat exchange membrane and sensible heat exchange membrane" refer to different types of membranes used in heat exchange applications. Strictly speaking, the main difference between total heat exchange membrane and sensible heat exchange membrane is that the air flow transfer from to another type of energy in the flow.

Total heat exchange membranes, also known as enthalpy or latent heat exchange membranes, can transfer sensible heat and latent heat (moisture) between two air streams, simultaneously transferring thermal energy and moisture, in air-to-air heat exchangers with total heat exchange membranes In which warm exhaust air and cooler incoming air flow on opposite sides of the membrane, the full heat exchange membrane facilitates the transfer of heat energy from the warmer air flow to the cooler air flow, as well as the transfer of moisture. This enables heat recovery and humidity control in ventilation systems, such as in energy recovery ventilation systems (ERV), which not only recover sensible heat but also recover latent heat through temperature transfer, which can add moisture to the incoming dry air or from Humidity enters the air to remove moisture to adjust the humidity level of the space environment, which is very important for adjusting the comfort of the indoor environment and in industries where dehumidification costs are high.

Sensible heat exchange membranes are heat recovery membranes that are designed to transfer sensible heat between two air flows. The sensible heat here refers to the heat energy related to temperature changes. Sensible heat exchange membranes are used in sensible heat energy recovery ventilation systems (HRV). ), these systems primarily recover sensible heat and, while transferring temperature, do not allow moisture to be transferred between the incoming and outgoing air streams. In this type of air exchanger, warm exhaust air and cooler incoming air are placed between the membranes. Opposite side flow, sensible heat exchange membranes facilitate the transfer of heat energy from the warmer air flow to the cooler air flow because the transfer of moisture is not allowed. Therefore, this type of membrane only focuses on heat recovery without affecting the air flow. humidity level.

So, how to judge the selection of these two membranes in practical applications? The choice between total heat exchange membrane and sensible heat exchange membrane depends on the specific requirements of the ventilation system or heat recovery application. If humidity control is important , for example in a humid climate, it may be preferable to use a total heat exchange membrane to recover heat and moisture, whereas if humidity control is not considered, a sensible heat exchange membrane may be used to recover heat while maintaining a separate humidity level in the airflow; if Temperature and humidity control are both important considerations, and an ERV may be more suitable; if you only need to adjust the temperature without affecting the indoor relative humidity, an HRV may be a better choice. There is one thing we must know, although these two The system's membranes all improve energy efficiency by recovering energy from the exhaust gas stream, but none of them can fulfill the insulation and sealing requirements.