Enthalpy Frequency Method and the Application of the Energy-Saving Potential of Total Heat Recovery Analysis

The definition and the statistical method of Enthalpy Frequency are proposed, so are the applicable research areas of Enthalpy Frequency Method. The basic elements and technical line on analyzing the energy-saving potential of total heat recovery are pointed out. Important parameters are defined, such as the critical enthalpy value of outdoor air, the net recovery energy, the operating ratio of heat exchanger, the energy-saving rate of heat recovery. Combined with the project as an example, Enthalpy Frequency Method and Dry Bulb Temperature Frequency Method are adopted to analyze total heat recovery potential of the heat exchanger respectively. By contrast the calculation process, parameters distribution and results, Enthalpy Frequency Method has an obvious advantage on the simplicity of process and accuracy of results. The reason that the calculation result of Dry Bulb Temperature Frequency Method has a large deviation is explained.