The Difference Between Energy Recovery Ventilator And Heat Recovery Ventilator

Abstract: do you know that there is a difference between HRV ERV system?

With the aggravation of indoor air pollution, the use of fresh air system is becoming more and more popular. If we want to breathe fresh and natural air without increasing the burden of daily living expenses and achieve the dual purposes of indoor air purification and energy saving, then we must choose the new air blower equipped with heat recovery machine which is suitable for our own use. It can ensure efficient indoor ventilation and ventilation, reduce energy loss, and maximize energy saving.

Before, perhaps you have understood the structure of the filter mesh, understand the role of electrostatic dust collector, then you also know that there is a total heat exchange and sensible heat? First of all, we need to know whether it is full heat or sensible heat, heat exchanger is to save the running cost of the machine, to achieve the purpose of energy saving.

Next, let's popularize the science. The energy recovery ventilation is a kind of air supply and exhaust system with heat recovery function added on the basis of bidirectional flow. The principle of the system is the same as the two-way flow. The difference is that the air supply and exhaust are only completed by one host, and a heat exchange core with the function of energy exchange is added to the host. The dirty air discharged from the outside and fresh air sent into the room are exchanged for heat in this full heat exchange device, so as to achieve the purpose of recovering cold and heat.

From the material point of view, the heat exchange core of the energy recovery ventilation belongs to the paper foil heat conduction material, because it can transfer more heat, so it should be better in the heat exchange effect. The heat exchange core body of the sensible hot fresh air exchanger is made of aluminum foil material. The water vapor cannot be permeated and the heat in the water vapor cannot be transferred well. Therefore, the heat exchange rate should be slightly lower. In terms of the composition of the atmosphere of indoor air, in addition to the molecules of gas, there are also molecules of water, both of which contain heat. The difference between total heat and sensible heat is whether the heat is exchanged with the water molecules. First of all, we distinguish from the heat exchange of energy recovery ventilation: if water molecules participate in the heat exchange, it belongs to the all-hot fresh air exchanger. If only the gas molecules participate in the heat exchange, it belongs to the heat recovery ventilator.